Biographical Information: Jeffrey C. Alt
EDUCATION
Ph.D. Marine Geology and Geophysics, University
of Miami, 1984
M.S. Marine Geology and Geophysics, University
of Miami, 1981
B.S. Honors in Geology and Mineralogy,
University of Michigan, 1975
PROFESSIONAL EXPERIENCE
Research Scientist, Dept. Geological Sciences, Univ. Michigan,
1998-present
Associate Research Scientist, Dept Geol. Sciences, Univ.
Michigan, 1991- 1998
Visiting Professor, Institut de Geologie, Universite Louis
Pasteur,
Strasbourg, France 3/96-8/96
Assistant Research Scientist, Dept. Geol. Sciences, Univ.
Michigan, 1989-1991
Senior Research Scientist, Washington University in St.
Louis, 1987-1989
Research Scientist, Washington University in St. Louis,
1985-1987
FIELD EXPERIENCE
Metamorphic Petrologist, Ocean Drilling Program Leg 206,
Superfast Pacific Crust, 2002
Yellowstone Lake, WY, ROV sampling hydrothermal vents,
7/97, 7/98
Metamorphic Petrologist, ODP Leg 185, Old Pacific Crust,
1998
Metamorphic Petrologist, Ocean Drilling Program 176, SW
Indian Ridge,1997
Hydrothermal vents in Yellowstone Lake, Wyoming, USA,
7/97, 7/98
Metamorphic Petrologist, Ocean Drilling Program Leg 158,
TAG hydrothermal deposit, Mid- Atlantic Ridge, 1994
Co-Chief Scientist, Ocean Drilling Program Leg 148,
Costa Rica Rift, 1993
Metamorphic Petrologist, Ocean Drilling Program Leg 140,
Costa Rica Rift, 1991
Igneous Petrologist, Ocean Drilling Program Leg 137, Costa
Rica Rift, 1991
Troodos Ophiolite, Cyprus, 1990
Igneous Petrologist, Ocean Drilling Program Leg 111, Costa
Rica Rift, 1986
Atlantis II-ALVIN, Hydrothermal vents and deposits on
seamounts near 21˚N, East Pacific Rise,
1985
Atlantis II-ALVIN, Seamounts in the E. Pacific, 1984
Igneous Petrologist, Deep Sea Drilling Project, Leg 83
Costa Rica Rift, 1981
PROFESSIONAL SOCIETIES AND COMMITTEES
Associate Editor, Geochimica et Cosmochimica Acta, 1993-present
NSF OCE-Marine Geology and Geophysics Review Panel (1995-1998)
RIDGE Steering Committee (1993-1996)
JOIDES Sedimentary and Geochemical Processes Panel (1989-1993)
Member: Geochemical Society, American Geophysical
Union,
Geological Society of America
RESEARCH INTERESTS
Water-rock interactions and metamorphism;
Geochemical cycling at mid-ocean ridges and subduction zones; Formation
of hydrothermal deposits.
HONORS AND AWARDS
2001 Research Scientist Achievement Award, LS&A, University of Michigan
1999 Excellence in Research Award, LS&A, University of Michigan
1983/1984 Koczy fellowship, University of Miami
PAPERS SUBMITTED/IN PRESS:
Teagle, D.A.H., and Alt, J.C., Hydrothermal alteration of basalts beneath
the Bent Hill Massive Sulfide Deposit, Middle Valley, Juan de Fuca Ridge,
Econ. Geol., in press, 9/03.
PUBLISHED PAPERS
2003
Alt, J.C., Davidson, G.J., Teagle, D.A.H., and Karson, J.A., The Isotopic
Composition of Gypsum in the Macquarie Island Ophiolite: Implications for
the Sulfur Cycle and the Subsurface Biosphere in Oceanic Crust, Geology,
31: 549–552;
Alt, J.C., and Teagle, D.A.H., Hydrothermal Alteration of Upper Oceanic Crust
Formed at a Fast Spreading Ridge: Mineral, Chemical, and Isotopic Evidence
from ODP Site 801. Chem Geol, 201, 191-211.
Alt, J. C., Stable isotopic composition of upper oceanic crust formed at
a fast spreading ridge, ODP Site 801, Geochem. Geophys. Geosyst., 4(5), 8908,
doi:10.1029/2002GC000400.
Alt, J.C., Hydrothermal Fluxes At Mid-Ocean Ridges And On Ridge Flanks, Comptes
Rendus Geoscience, 335, 853-864.
Alt, J.C., Alteration Of The Upper Oceanic Crust:Mineralogy, Chemistry, And
Processes, in: Elderfield, H. and Davis, E., eds, Hydrogeology of the Oceanic
Lithosphere, Elsevier, in press.
Alt, J.C., and W. Bach. Alteration of Oceanic Crust: Subsurface Rock-Water
Interactions, in: Energy and mass transfer in marine hydrothermal systems,
P.E. Halbach, V. Tunnicliffe, and J.R. Hein, eds., Dahlem University Press,
7-27.
Alt, J.C. and W.C. Shanks, Serpentinization of abyssal peridotites from the
MARK area, Mid-Atlantic Ridge: Sulfur geochemistry and reaction modeling,
Geochim. Cosmochim. Acta, 67, 641-653.
Kesler, S.E., Fortuna, J., Alt, J.C., Ye, Z., Core, D.P., Zohar, P., Borhauer,
J., and Chryssoulis, S.L., Evaluation of the role of sulfidation in deposition
of gold, Screamer section of the Betze-Post Carlin-Type gold deposit, Nevada,
Econ. Geol. 98, 1137-1157.
Devey, C.W., J.C. Alt, W. Bach, J. Erzinger, A.T. Fisher, K.M. Gillis, M.
Kinoshita, P. Nehlig, H. Staudigel, 2002. What Is the Nature of Sub-seafloor
Fluid Circulation and Reaction Processes? in: Energy and mass transfer in
marine hydrothermal systems, P.E. Halbach, V. Tunnicliffe, and J.R. Hein,
eds., Dahlem University Press, 71-84.
Teagle, D.A.H., M.J. Bickle, J.C. Alt, 2003. Recharge flux to ocean-ridge
black smoker systems: a geochemical estimate from ODP Hole 504B Earth Planet.
Sci. Lett. 210, 81-89
2002
Chan, Lui-Heung, J.C. Alt, and D.A.H. Teagle, Lithium and lithium isotope
profiles through the upper oceanic crust:A study of seawater basalt exchange
at ODP Sites 504b and 896A. Earth Planet. Sci. Lett., 201, 187-201.
2001
Alt, J.C. and W. Bach, Low Grade Hydrothermal Alteration Of Uplifted Lower
Oceanic Crust, Hole 735B: Mineralogy And Isotope Geochemistry. Proc. OCP,
Sci. Results., Ocean Drilling Program, College Station, TX, v. 176,. http://www-odp.tamu.edu/publications/176_SR/
Bach, W. Alt, J.C., Niu, Y., Humphris, S.E., Erzinger, J., and Dick, H.J.B.,
The chemical consequences of late-stage hydrothermal circulation in an uplifted
block of lower ocean crust at the SW Indian Ridge: Results from ODP Hole
735B (Leg 176). Geochimica et Cosmochimica Acta, 19: 3267-3287.
Blake, R.E., Alt, J.C. and Martini, A.M., Oxygen isotope ratios of PO4: An
inorganic indicator of enzymatic activity and P metabolism and a new biomarker
in the search for life. Proc. Nat. Acad. Sci. 98: 2148-2153.
Robinson, P.T., et al., Lower oceanic crust formed at an ultraslow spreading
rideg: Ocean Drilling Program Hole 735B, SW Indian Ridge. in: Dilek, Y.,
E. Moores, and D. Elthon and A. Nicolas, eds., Geol. Soc. Am. Spec. Paper
349, Ophiolites and Oceanic Crust: New Insights from Field Studies and Ocean
Drilling Program, 75-86.
Zhou, W., D.R. Peacor, J. Alt, R. Van der Voo, L.-S. Kao. TEM Study of the
Alteration of Glass in MORB by Inorganic Processes. Chem. Geol. 174, 365-376.
2000
Alt, J.C. and P. Mata, 2000. On the role of microbes in the alteration of
submarine basaltic glass: A TEM Study. Earth Planet. Sci. Lett., 181,
301-313.
Alt, J.C. and D.A.H. Teagle. Hydrothermal alteration and fluid fluxes
in
ophiolites and oceanic crust, in: Dilek, Y., E. Moores,
and D. Elthon and A. Nicolas, eds., Ophiolites and Oceanic Crust: New Insights
from Field Studies and the Ocean Drilling Program, Geol. Soc. Am. Spec. Paper
349, 273-282.
Smith, Spivack, Fisk, Haveman, Staudigel, and Shipboard Scientific Party.
Methods for quantifying microbial contamination during deep ocean coring,
ODP Technical Note 28, http://www-odp.tamu.edu/publications/tnotes/tn28/INDEX.HTM.
Plank, T., Ludden, J.., Escutia, C., et al., Initial Reports ODP, v. 185,
http://www-odp.tamu.edu/publications
Dick, H.J.B., J. Natland, J. Alt, W. Bach, D. Bideau, J. Gee, S. Haggas,
J. Hertogen, G. Hirth, P. Holm, B. Ildefonse, G. Iturrino, B. John, D. Kelley,
E. Kikawa, A. Kingdon, P. LeRoux, J. Maeda, P. Meyer, D.J. Miller, H.R. Naslund,
Y.L. Niu, P. Robinson, J. Snow, R. Stephen, P. Trimby, H.U. Worm, A. Yoshinobu.
A long in-situ section of the lower ocean crust: Results of ODP Leg 176 drilling
at the southwest Indian Ridge. Earth Planet. Sci. Lett. 179, 31-51.
Yi, W., A.N. Halliday, M. Garcia, C. Langmuir, J. Alt, D.C. Lee. Tellurium,
Cadmium and sulfur in oceanic basalts and chalcophile element fractionation
in the mantle. J. Geophys. Res.,105, 18,927-18,948.
D.A.H. Teagle, M.J. Bickle, and J.C. Alt, High Temperature Mid-ocean Ridge
Hydrothermal Flux Estimates from Sr-transport Modeling of Fluid-rock Exchange
in Hole 504B, (extended abstract) Goldschmidt conference Journal of Conference
Abstracts Volume 5(2), 987, Cambridge Publications, Oxford, UK.
Robinson, P.T., et al., 2001. Lower oceanic crust formed at an ultra-slow-spreading
ridge:
Ocean Drilling Program Hole 735B, Southwest
Indian Ridge. In Dilek, Y.,
Moores, E., Elthon, D., and Nicolas,
A. (Eds.), Ophiolites and Oceanic Crust:
New Insights from Field Studies and
the Ocean Drilling Program, Spec.
Pap. Geol. Soc. Am., 349:75-86.
1999.
Alt, J.C., Hydrothermal alteration of the oceanic crust: Mineralogy, geochemistry
and processes. In: Vocanic Associated Massive Sulfide Deposits, Reviews In
Economic Geology, vol. 8, Barrie, T., and Hannington, M. eds., Soc. Econ.
Geol. Chelsea, MI, 133-155.
Alt, J.C., Very Low Grade Hydrothermal Metamorphism of Basic Igneous Rocks.
In: Very Low Grade Metamorphism. M. Frey and D. Robinson, eds., Blackwell
Scientific, pp. 169-201.
Fisk, M. and Leg 185 Shipboard Scientific Party. New Shipboard Laboratory
May Answer Questions about Deep Biosphere. EOS, 80, 580..
Alt, J.C. and D.A. H. Teagle. Uptake of carbon during alteration of oceanic
crust. Geochim. Cosmochim. Acta, 63, 1527-1535.
Rehkamper, M. A.N. Halliday, J. Alt, J.G. Fitton, J. Zipfel, and E. Takazawa,
Non-Chondritic Platinum-Group Element Ratios in Abyssal Peridotites: Petrogenetic
Signature of Melt Percolation?, Earth Planet. Sci. Lett.,172, 65-81.
Teagle, D.A.H. and J.C. Alt, Alteration and vein log of ODP Holes 917A and
918D, SE Greenland Margin, In Duncan, R.A. H.C. Larsen, J.F. Allan eds.,
Proc. ODP Sci. Results, 163.
1998
Alt, J.C. and W.C. Shanks, Sulfur in serpentinized oceanic peridotites:
Serpentinization processes and microbial sulfate reduction, J. Geophys. Res.,
103, 9917-9929.
Alt, J.C., D.A.H. Teagle,T.S. Brewer, W.C. Shanks, and A.N. Halliday,
Alteration and mineralization of an oceanic forearc and the ophiolite-ocean
crust analogy, J. Geophys. Res., 103, 12,365-12,380.
Teagle, D.A.H., J.C. Alt, and A.N. Halliday, Tracing the chemical evolution
of fluids during hydrothermal recharge: Constraints from anhydrite recovered
in ODP Hole 504B, Earth Planet. Sci. Lett., 155, 167-182.
Teagle, D.A.H., J.C. Alt, H. Chiba, S. Humphris, and A.N. Halliday. Strontium
and oxygen isotopic constraints on fluid mixing, alteration and mineralization
in the TAG hydrothermal deposit. Chem. Geol. 149, 1-24
Teagle, D.A.H., J.C. Alt and A.N. Halliday. Tracing the evolution of
hydrothermal fluids in the upper oceanic crust: Sr isotopic constraints from
DSDP/ODP Holes 504B and 896A, in: Modern Ocean-Floor Processes and the Geological
Record, R.A. Mills and K. Harrison, eds, Geol. Soc. Lond. Spec. Pub. 148,
pp. 81-97.
1997
Alt, J.C., and Teagle, D.A.H., Probing the TAG hydrothermal mound and
stockwork: Oxygen isotopic profiles from deep ocean drilling, In: Humphris,
S.E., Herzig, P.M., Miller, D.J., Zierenberg, R. (Eds.), Proc. ODP, Sci.
Results, 158: College Station, TX (Ocean Drilling Program), 285-294.
Honnorez, J.C. Alt, and S. Humphris. Vivisection and autopsy of active and
fossil hydrothermal alterations of basalt beneath and within the TAG hydrothermal
mound. In: Humphris, S.E., Herzig, P.M., Miller, D.J., Zierenberg, R. (Eds.),
Proc. ODP, Sci. Results, 158: College Station, TX (Ocean Drilling Program),
231-254.
Humphris, S.E., J.C. Alt, D.A.H. Teagle, and J. Honnorez. Geochemical
changes during hydrothermal alteration of basement in the stockwork beneath
the active TAG Hydrothermal mound. In: Humphris, S.E., Herzig, P.M.,
Miller, D.J., Zierenberg, R. (Eds.), Proc. ODP, Sci. Results, 158: College
Station, TX (Ocean Drilling Program), 255-276.
Teagle, D.A.H., J.C. Alt, S.H. Humphris and A.N. Halliday. Dissecting
an active hydrothermal deposit: The strontium and oxygen isotopic anatomy
of the TAG hydrothermal mound - whole rock and silicate minerals. In:
Humphris, S.E., Herzig, P.M., Miller, D.J., Zierenberg, R. (Eds.), Proc.
ODP, Sci. Results, 158: College Station, TX (Ocean Drilling Program), 297-312.
Teagle, D.A.H., J.C. Alt, H. Chiba, and A.N. Halliday. Dissecting an
active hydrothermal deposit: The strontium and oxygen isotopic anatomy of
the TAG hydrothermal mound - Anhydrite. In: Humphris, S.E., Herzig,
P.M., Miller, D.J., Zierenberg, R. (Eds.), Proc. ODP, Sci. Results, 158:
College Station, TX (Ocean Drilling Program), 129-142.
1996
Alt, J.C., D.A.H. Teagle, C. Laverne, D. Vanko, W. Bach, J. Honnorez,
K. Becker, M. Ayadi, and P.A. Pezard. Ridge flank alteration of upper
ocean crust in the eastern Pacific: A synthesis of results for volcanic
rocks of holes 504B and 896A. In: Alt, J.C., Kinoshita, H., Stokking, L.B.,
and Michael, P.,J. (Eds.), Proc. ODP, Sci.Results, 148: College Station,
TX (Ocean Drilling Program, 435-452).
Alt, J.C., C. Laverne, D. Vanko, P. Tartarotti, D.A.H. Teagle, W. Bach, E.
Zuleger, J. Erzinger, J. Honnorez, P.A. Pezard, K. Becker, M. H. Salisbury,
and R.H. Wilkens. Hydrothermal alteration of a section of upper oceanic
crust in the eastern equatorial Pacific: A synthesis of results from Site
504 (DSDP legs 69, 70, and 83, and ODP legs 111, 137, 140, and 148). In:
Alt, J.C., Kinoshita, H., Stokking, L., and Michael, P., et al., Proc. ODP,
Sci. Results, 148: College Station, TX (Ocean Drilling Program), 417-434.
Alt, J.C., D.A.H. Teagle, W. Bach, A.N. Halliday, and J. Erzinger.
Stable and strontium isotopic profiles through hydrothermally altered upper
oceanic crust, ODP Hole 504B. In Alt, J.C., Kinoshita, H., Stokking, L.,
and Michael, P., Proc. ODP, Sci. Results, 148, College Station, TX (Ocean
Drilling Program), 47-70.
Alt, J.C., Kinoshita, H., Stokking, L., and Michael, P., Proc. ODP,
Scientific Results, 148, ODP, College Station, TX, 512 pp.
Bach, W., J. Erzinger, J. Alt, and D.Teagle. Chemistry of the lower
sheeted dike complex, ODP Hole 504B: The influence of magmatic differentiation
and hydrothermal alteration. In Alt, J.C., Kinoshita, H., Stokking,
L., and Michael, P., Proc. ODP, Sci. Results, 148,College Station, TX (Ocean
Drilling Program), 39-56.
Mills, R. A., T. Clayton and J.C. Alt. Low-temperature fluid
flow through sulfidic sediments from TAG: modification of fluid chemistry
and alteraion of mineral deposits. Geophys. Res. Lett., 23: 3495-3498.
Teagle, D.A.H., J.C. Alt, W. Bach, A.N.Halliday, and J. Erzinger. Alteration
of upper oceanic crust in a ridge flank hydrothermal upflow zone: Mineral,
chemical and isotopic constraints from ODP Hole 896A. In Alt, J.C.,
Kinoshita, H., Stokking, L., and Michael, P., Proc. ODP, Sci. Results, 148,College
Station, TX (Ocean Drilling Program), 119-150.
Vanko, D.A., C. Laverne, P. Tartarotti, and J. C. Alt. Chemistry and origin
of secondary minerals from the deep sheeted dikes cored during ODP Leg 148,
Hole 504B. In Alt, J.C., Kinoshita, H., Stokking, L., and Michael,
P., Proc. ODP, Sci. Results, 148, College Station, TX (Ocean Drilling Program),
71086.
Zuleger, E., J.C. Alt and J. Erzinger. Trace element geochemistry of
the lower sheeted dike complex: Hole 504B, Leg 140. In Alt, J.C., Kinoshita,
H., Stokking, L., and Michael, P., Proc. ODP, Sci. Results, 148,College Station,
TX (Ocean Drilling Program), 455-466.
1995
Alt, J.C. Subseafloor processes in mid-ocean ridge hydrothermal systems.
In: Humphris, S., J. Lupton, L. Mullineaux, and R. Zierenberg, eds., Seafloor
hydrothermal Systems: , Physical, Chemical, and Biological Interactions,
Geophys. Monogr. 91, AGU, Wash. DC; 85-114.
Alt, J.C. Sulfur Isotopic Profile through the Oceanic Crust: Sulfur
mobility and seawater-crustal sulfur exchange during hydrothermal alteration.
Geology, 23: 585-588.
Humphris, S.H., P.M. Herzig, D.J. Miller, J.C. Alt, et al., The internal
structure of an active seafloor massive sulfide deposit, Nature, 377: 713-716.
Kadko, D., J. Baross, and J.C. Alt. Hydrothermal fluxes and global change.
In: Humphris, S., J. Lupton, L. Mullineaux, and R. Zierenberg, eds., Seafloor
Hydrothermal Systems: , Physical, Chemical, and Biological Interactions,
Geophys. Monogr. 91, AGU, Wash. DC; 446-466.
Alt, J.C., Zuleger, E., and Erzinger, J. Stable isotopic compositions of
hydrothermally altered lower sheeted dikes, ODP Hole 504B, Leg 140. In: Dick,
Erzinger, Stokking et al., Proc. ODP, Scientific Results, V. 140; 155-166.
Appold, M., Kesler, S., and Alt, J. Geochemical constraints on the
genesis of Mississippi Valley-type mineralization in the central Appalachians,
Econ. Geol.90: 902-919.
Laverne, C., J.C. Alt, P. Tartarotti, and D. Vanko. Chemistry and geothermometry
of secondary minerals from the deep sheeted dike complex, Hole 504B, Leg
140. In: Dick, Erzinger, Stokking et al., Proc. ODP, Scientific Results,
V. 140; 167-191.
Zuleger, E., J.C. Alt, and J. Erzinger. Primary and secondary variations
in major and trace element geochemistry of the lower sheeted dike complex,
ODP Hole 504B, Leg 140. In: Dick, Erzinger, Stokking et al., Proc. ODP, Sci.
Results, V. 140; 65-80.
Fisk, M.R., K.T.M. Johnson, and J.C. Alt. The effect of assimilation of altered
oceanic crust on magma chemistry: an experimental study. In:
Dick, Erzinger, Stokking et al., Proc. ODP, Scientific Results, V. 140; 43-52.
Magenheim, A.J., A.J. Spivack, J.C. Alt, G. Bayhurst, and J.M. Gieskes. Borehole
fluid chemistry in Hole 504B, Leg 137: Formation water or in-situ reaction?
In: Dick, Erzinger, Stokking et al., Proc. ODP, Scientific Results, V. 140;
141-154.
1994
Alt, J.C. A sulfur isotopic profile through the Troodos Ophiolite, Cyprus:
Primary composition and the effects of seawater hydrothermal alteration.
Geochim. Cosmochim. Acta, 58: 1825-1840.
1993
Alt, J.C., W.C. Shanks, and M.C. Jackson. Cycling of sulfur in subduction
zones: The geochemistry of sulfur in the Mariana Island Arc and back-arc
Trough. Earth Planet. Sci. Lett. 119: 477-494.
Alt, J.C. Low-temperature alteration of basalts from the Hawaiian Arch,
ODP leg 136. Proc. ODP, Sci. Results, 136: College Station, TX (Ocean Drilling
Program), 133-146.
Alt, J.C., Kinoshita, H., Stokking, L., et al., Proc. ODP, Init. Results
148 (Ocean Drilling Program) 352 pp.
Alt, J.C., H. Kinoshita, L. Stokking, and the Leg 148 Scientific party. ODP
Leg 148 barely misses deepest layer. EOS, Trans. AGU, 74: 489-494.
1992
Alt, J.C., C.F. Lanord, P.A. Floyd, P. Castillo, and A. Galy. Low-temperature
hydrothermal alteration of Jurassic ocean crust, Site 801. In: R.L. Larson,
Y. Lancelot et al., Proc. ODP, Scientific Results, v. 129, College Station,
TX (Ocean Drilling Program): 415-427
Alt, J.C. and J.W. Burdett. Sulfur in Pacific Deep sea sediments (Leg 129)
and implications for cycling of sulfur in subduction zones, In: R.L.
Larson,, Y. Lancelot et al., Proc. ODP, Scientific Results, v. 129, College
Station, TX (Ocean Drilling Program): 283-294.
Boni, M., J.C. Alt, G. Balassone, and A. Russo. A reappraisal of the stratabound
ores at the mid-Ordovician unconformity in SW Sardinia. In: L. Carmignani
and F.P. Sassi, eds., Contributions to the Geology of Italy with Special
Reference to Paleozoic basement. IGCP No 276, v. 5: 57-60.
Castillo, P.R., P.A. Floyd, C.F. Lanord, and J.C. Alt. Summary of geochemical
data for Leg 129 Igneous rocks. In: R.L. Larson,, Y. Lancelot et al.,
Proc. ODP, Scientific Results, v. 129, College Station, TX (Ocean Drilling
Program): 653-670.
Magenheim, A.J., G. Bayhurst, J.C. Alt, and J.M. Geiskes. ODP Leg 137, Borehole
fluid chemistry in Hole 504B. Geophys. Res. Lett., 19: 521-524.
Magneheim, A.J., J.M. Geiskes, G. Bayhurst, and J.C. Alt. Oceanic borehole
fluid chemistry from Site 504B: Seawater rock reaction within the borehole
environment. In: Water-rock interaction, Proc. 7th Internat. Symp. on Water-Rock
Interaction, Y.K. Kharaka and A.S. Maest, eds., A.A. Balkema (Rotterdam),
p. 1655-1658.
Mottl, M.J., and J.C. Alt. Minor and trace element and sulfur isotopic
composition of pore waters from Sites 778 through 786. Pearce, J.A.,
Fryer, P., et al., Pearce, J.A., Fryer, P., et al., Proc. ODP, Sci. Results,
125, College Station, TX (Ocean Drilling Program):683-688.
Pezard, P., R.N. Anderson, W.B.F. Ryan, K. Becker, J.C. Alt, and P. Gente.
Accretion, structure and hydrology of intermediate spreading-rate oceanic
crust from drillhole experiments and seafloor observations. Mar. Geophys.
Res., 14: 93-123.
1991
Alt, J.C. A sulfur isotopic profile through the Troodos Ophiolite,
Cyprus: Preliminary results and implications. Tj. Peters et al.
(Eds), Ophiolite genesis and evolution of oceanic lithosphere, Kluwer (Dordrecht),
p. 427-443.
Alt, J.C., and T.F. Anderson, The mineralogy and isotopic composition of
sulfur in Layer 3 gabbros from the Indian Ocean, ODP Hole 735B. Von
Herzen, R.P., Robinson, P.T., et al., Proc. ODP, Scientific Results, 118:113-125.
Alt, J.C., and W.T. Jiang. Hydrothermally precipitated mixed-layer
illite-smectite in recent massive sulfide deposits from the seafloor.
Geology, 19: 570-573.
Weissel, J. Pierce, J., Taylor, E., Alt, J., et al. Proc ODP Sci. Results,
121: College Station, TX (Ocean Drilling Program), 990 pp.
1990
Anderson, R.N., J.C. Alt, J. Malpas, M. Lovell, P.K. Harvey, and E.L. Pratson.
Geochemical well logging in basalts: The Palisades Diabase Sill and
the oceanic crust of Hole 504B, eastern equatorial Pacific. Jour. Geophys.
Res., 95: 9265-9242.
Hannington, M., P. Herzig, and J.C. Alt. The distribution of gold in
sub-seafloor stockwork mineralization from DSDP Hole 504B and the Agrokipla
B deposit, Cyprus. Can. J. Earth Sci., 27: 1409-1417.
1989
Alt, J.C., T.F. Anderson, and L. Bonnell, The geochemistry of sulfur in a
1.3km section of hydrothermally altered oceanic crust, DSDP Hole 504B.
Geochim. Cosmochim. Acta, 53: 1011-1023.
Alt, J.C., and M. Chaussidon, Ion microprobe analysis of the sulfur isotopic
composition of sulfides in hydrothermally altered rocks, DSDP/ODP Hole 504B.
Becker, K., Sakai, H., et al., Part B Proceedings of the Ocean Drilling Program,
vol. 111; 41-45.
Alt, J.C., T.F. Anderson, L. Bonnell, and K. Muehlenbachs, The mineralogy,
chemistry and stable isotopic compositions of hydrothermally altered sheeted
dikes: ODP Hole 504B, Leg 111. Becker, K., Sakai, H., et al.,
Part B Proceedings of the Ocean Drilling Program, vol. 111; 27-40.
Becker, K., H. Sakai, et al., Ground-truth from the young oceanic crust at
Hole 504B: Summary of results from DSDP/ODP Legs 69, 70, 83, 92, and
111. Rev. Geophys., 27; 79-102.
Laverne, C., J. Honnorez, and J. Alt, Transition entre l'alteration Ö
basse temperature et l'alteration hydrothermale de la croute oceanique:
Etude petrographique et geochimique du puits 504B, Est Pacifique. Bull.
Geol. Soc. France, 8; 327-337.
Anderson, R.N., J.C. Alt, and J. Malpas, Geochemical well logs and the determination
of integrated chemical fluxes in Hole 504B, Eastern Equatorial Pacific.
Becker, K., Sakai, H., et al., Part B Proceedings of the Ocean Drilling Program,
vol. 111; 119-132.
1988
Alt, J.C., Hydrothermal oxide and nontronite deposits on seamounts in the
eastern Pacific, Mar. Geol., 81, p. 227-239.
Alt, J.C., The chemistry and sulfur isotopic composition of massive sulfide
and associated deposits on Green Seamount, Eastern Pacific, Econ. Geol.,
83, p. 1026-1033.
1987
Alt, J.C., Lonsdale, P., Haymon, R., and Muehlenbachs, K., Hydrothermal sulfide
and oxide deposits on seamounts near 21˚N, East Pacific Rise, Geol. Soc.
Am. Bull., v. 98; 157-168.
Leg 111 Scientific Party, Costa Rica Rift hole deepened and logged, Geotimes,
32; 14-16.
1986
Alt, J.C., Honnorez, J., Laverne, L., and Emmermann, R., Hydrothermal alteration
of a 1 km section through the upper oceanic crust, DSDP Hole 504B:
The mineralogy, chemistry, and evolution of seawater-basalt interactions.
Jour. Geophys. Res., v. 91, p. 10,309-10,335.
Alt, J.C., Muehlenbachs, K., and Honnorez, J., An oxygen isotopic profile
through the upper kilometer of the oceanic crust, DSDP Hole 504B. Earth
Planet. Sci. Lett., v. 80, p. 217-229.
1985
Alt, J.C., Laverne, C., and Muehlenbachs, K., Alteration of the upper oceanic
crust: Mineralogy and processes in DSDP Hole 504B, Leg 83. DSDP
Initial Reports, v. 83, 217-248.
Alt, J.C., and Emmermann, R., Geochemistry of hydrothermally altered basalts,
DSDP Hole 504B, Leg 83, DSDP Initial Reports, v. 83, 249-262.
Alt, J.C., Saltzman, E.S., and Price, D.A., Anhydrite in hydrothermally altered
basalts: DSDP Hole 504B, Leg 83. DSDP Initial Reports, v. 83,
283-288.
Honnorez, J., Alt, J.C., Honnorez-Guerstein, B.M., Laverne, C., Muehlenbachs,
K., Ruiz, J., and Saltzman, E.S., Stockwork-like sulfide mineralization in
young oceanic crust: DSDP Hole 504B. DSDP Initial Reports, v.
83, 263-282.
1984
Alt, J.C., and Honnorez, J., Alteration of the Upper Oceanic Crust:
DSDP Site 417. Mineralogy and Chemistry. Contrib. Mineral. Petrol.,
37; 149-169.
Bohlke, J.K., Alt, J.C., and Muehlenbachs, K., Oxygen Isotope-Water Relationships
in Altered Deep-Sea Basalts: Low Temperature Mineralogical Controls,
Can. J. Earth Sci., 21; 67-77.
1983
Alt, J.C., Honnorez, J., Hubberten, H.-W., and Saltzman, E.S., Occurrence
and Origin of Anhydrite from DSDP Leg 70, Hole 504B, Costa Rica Rift, in
Cann, J.R., Langseth, M.D., Honnorez, J., von Herzen, R.P., White, S.M.,
et al., Init. Repts. DSDP, 69: Washington (U.S. Government Printing
Office), 547-550.
Anderson, R.N., Honnorez, J., Becker, et al., Une coupe de reference de la
croute oceanique: le leg 83 du programme international de forages oceanique
profonds (IPOD) au voisinage du rift de Costa Rica, Pacifique Oriental.
C.R. Acad. Sc. Paris, 296: 281-286.
1982
Anderson, R.N., Honnorez, J., Becker, K. et al., Challenger Drills Deep Into
Basement, Geotimes, vol. 27, no. 5, 26-28.
Anderson, R.N., Honnorez, J., Becker, et al., DSDP Hole 504B, The First Reference
Section Over 1 km through Layer 2 of the Oceanic Crust, Nature, vol. 3000,
no. 5893, 589-594.
Becker, K., et al., In situ Electrical Resistivity and Bulk Porosity of the
Oceanic Crust, Costa Rica Rift, Nature, vol. 3000, no. 5893, 594-598.
ABSTRACTS AND UNPUBLISHED REPORTS
2004.
Nielsen, S.G., M. Rehkamper, J. Alt, D. Butterfield, K. Haase, A. N. Halliday,
J. Ishibashi, K. Okamura, Y. Sohrin.. An elemental and isotopic study
of the marine geochemistry of thallium. AGU Ocean Sciences meeting,
abstract
2003.
Alt, J. C. anmd W.S. Shanks. Hydration And Sulfur Metasomatism of Forearc
Mantle, Geol. Soc. Am. Ann. Mtg, Program with Abstracts, Paper No. 60-10
(abstrac)
LAVERNE, C., ALT, J.C., BANERJEE, N.R. , COGGON, R., TEAGLE, D.A.H., WILSON,
D.S. , ACTON, G.D., LEG 206 SHIPBOARD SCIENTIFIC PARTY Le puits DSDP/ODP
504b a eu un petit frère: naissance du puits ODP/IPOD 1256D dans le
bassin du Guatemala en Décembre 2002. Altération de la croûte
océanique, Eur. Union Geos. (abstract)
King. L.E., D.A. Teagle, M.J. Cooper, J.C. Alt, Sr Isotopic Constraints from
the CCSP CY-4 Drill Hole, Troodos Ophiolite, Cyprus. EOS Trans AGU, V21D-0548
(Abstract)
Wilson, D.W., D.A.H. Teagle, G.D. Acton and the Leg 206 Scientific Party.
First Results From Hole 1256D - a New Ocean-Crust Reference Hole Drilled
in Fast-Spread Crust During ODP Leg 206, EOS Trans AGU, U12A-02 (abstract)
Teagle, D.A., R.M. Coggon, J.C. Alt, and G.Davidson. Strontium and Oxygen
Isotopic Profiles Through a Complete Sequence of Oceanic Crust Exposed on
Macquarie Island. EOS Trans AGU, V22F-08, (abstract)
2002
Core, D.P., Essene, E., Kesler, S., And Alt, J. C. Stability Of S-Bearing
Apatite And Biotite, Geol. Soc. Am. Ann Mtg,, Paper No. 234-10 (Abstract)
Shanks, W. C. III, Balistrieri, L., Alt, J., Morgan, L., Meeker, G., Rye,
R., And Schwartz, C., Hydrothermal Vents And Sublacustrine Siliceous Spires
In Yellowstone Lake, Geol. Soc. Am. Ann Mtg,, Paper No. 228-11 (Abstract)
2001
Alt, J C, Davidson, G Teagle, D A, Isotopic Studies of Gypsum in the Macquarie
Island Ophiolite: Tracing Hydrothermal Reactions, AGU Fall meeting, Abstract.
Alt, J.C., Davidson, G., and Teagle, D.A.H., Isotopic Compositions of Gypsum
in the Macquarie Island Ophiolite: Tracing Hydrothermal Reactions,
abstract, GSA annual meeting, 2001, http://gsa.confex.com/gsa/2001AM/finalprogram/abstract_27699.htm
Bach, W., Alt, J.C., and Humphris, S.E., A Geochemical And Isotopic Study
Of The Magmatic-Hydrothermal Transition In The Lower Oceanic Crust (ODP Hole
735B), abstract, GSA annual meeting, 2001, http://gsa.confex.com/gsa/2001AM/finalprogram/abstract_28350.htm
Davidson, G., J.C. Alt, R. Varne, and A.V. Brown, 2001. The Effect of Increased
Slow Spreading Extension On The Ocean Crust Dike/Basalt Hydrothermal Sulfur
Anomaly (Macquarie Island, Southern Ocean). Abstract, GSA Annual meeting.
http://gsa.confex.com/gsa/2001AM/finalprogram/abstract_24333.htm
Farr, L C , Plank, T , Kelley, K , Alt, J C , U Mineral Hosts and Enrichment
Processes in Altered Oceanic Crust. AGU Fall meeting, Abstract.
Teagle, D A , Bickle, M J, Alt, J.C., Ridge-Flank Hydrothermal Circulation
is not a Cure for the Imbalance in Oceanic Sr-Isotope Budgets, Abstract AGU
ann mtg,
Valentine, R B, Alt, J C, Morris, J D, Kelley, K A, Lithium
Budget and Isotopic Characterization of Materials Entering the Izu-Mariana
Subduction Zone. Abstact, AGU fall meeting.
2000
Alt and Mata, A TEM Study of Altered Submarine Basaltic Glass: Are
Microbes Responsible? RIDGE Theoretical Institute, Subsurface biosphere in
ocean crust, Big Sky Montana.
R.E. Blake, J.C. Alt, and N. Moreira, d18O of Phosphate:
A Geochemical Fingerprint for Biological Activity, EOS Trans AGU.
Kelley, K., Plank, T., Farr, L., Ludden, J., Staudigel, H., and Alt, J.,
Subduction cycling of altered oceanic crust: U, Th and Pb budgets. EOS Trans
AGU
1999
Bach, W., Niu, Y., Alt, J.C., and Humphris, S.E. (1999) Alteration of oceanic
troctolites by magmatic fluids in Ocean Drilling Program Hole 735B? in Ninth
Annual V.M. Goldschmidt Conference, pp. 15-16. LPI Contribution No. 971,
Lunar and Planetary Institute, Houston.
Halliday, A N, W. yi, J.C. Alt, D.C. Lee, D. A. Teagle, C.H. Langmuir, M.O.
Garcia, and M. Rehkamper, Trace chalcophile element geochemistry of the Earth,
EOS, Trans AGU. (abstract)
Shipboard Scientific Party, Leg 185, Drilling Input to the Subduction Factory:
ODP Leg 185. MARGINS Newsletter, vX.
Fisk, M., and Leg 185 Shipboard Scientific Party,. Evidence of Microbial
Activity in the Oldest Ocean Crust, EOS.
Larson, R.L., and Leg 185 Shipboard Scientific Party. Multiple Reversals
and/or Intensity Fluctuations in the Jurassic Magnetic Quiet Zone (JQZ) Measured
by Downhole Logging in ODP Hole 801C, EOS.
Murray, and Leg 185 Shipboard Scientific Party, 1999.Dispersed Volcanic
Ash in Marine Sediments, EOS.
Smith, D., and Leg 185 Shipboard Scientific Party. Evaluation of Drilling
Induced Contamination of Deep Sea Sediments and Volcanic Rocks for Microbiological
Studies on the Drillship JOIDES Resolution, EOS.
Steiner, M., and Leg 185 Shipboard Scientific Party. Finally! Origin(s)
of the Jurassic Quiet Zone (JQZ), EOS.
M. Rehkämper, A. N. Halliday, J. Alt, J. G. Fitton, J. Zipfel, E. Takazawa,
Non-Chondritic Platinum-Group Element Ratios in Abyssal Peridotites: Petrogenetic
Signature of Melt Percolation?, EUG, Strasbourg.
1998
Alt, J.C. and W.C. Shanks, Uptake of sulfur during serpentinization of abyssal
peridotites, EOS, Trans. AGU.
M. Rehkämper, A. N. Halliday, J. Alt, J. G. Fitton, J. Zipfel, E. Takazawa
Non-Chondritic Platinum-Group Element Ratios in Abyssal Peridotites:
Petrogenetic Signature or Evidence for Core-Mantle Interaction ?, EOS, Trans
AGU.
Shanks, W.C., L. Balistrieri, J. Alt, A. Meier, and D. Lovalvo, Geology and
geochemistry of hydrothermal systems in Yellowstone Lake, Yellowstone 125th
Anniversary Symposium Abstracts, p. 52.
1997
Shanks, W.C. III, J. Alt, A. Meier, and V. Klump. Geochemical Studies
of Hydrothermal Deposits Related to Sublacustrine Hydrothermal Vents in Yellowstone
Lake. EOS, Trans. AGU.
Teagle, D.A.H., J.C. Alt and J.C.G. Walker. The Influence of Hydrothermal
Circulation at Mid-ocean ridges on the Oxygen Isotopic Composition of Seawater
Sulfate. EOS, Trans. AGU.
Teagle, D.A.H., J.C. Alt, and A.N. Halliday, Tracing the evolution of hydrothermal
fluids in the upper oceanic crust: Constraints from DSDP/ODP Hole 504B, Geol.
Soc. Lond. May 1997.
Teagle, D.A.H., J.C. Alt, A.N. Halliday, H. Chiba, and S. Humphris, Dissecting
an active hydrothermal deposit: The strontium and oxygen isotopic anatomy
of the TAG mound, in Modern ocean-floor processes and the geological record,
Geol. Soc. Lond. May 1997.
Teagle, D.A.H., J.C. Alt, and the Leg 169 Shipboard Scientific Party, Alteration
of basalts from the Bent Hill massive sulfide deposit, Ninth Internat. Symp.
Water-Rock Interact., Taupo, New Zealand.
Yi, W., A.N. Halliday, M. Garcia, C. Langmuir, J. Alt, D.C. Lee. Tellurium,
Cadmium and sulfur in oceanic basalts and chalcophile element fractionation
in the mantle. EOS, Trans. AGU
1996
Alt, J.C. Upper crustal hydrothermal systems: Progress and problems. In:
The oceanic lithosphere and scientific drilling into the 21st century, ODP-Interridge-IAVCEI
workshop report, Woods Hole, MA. p. 23.
Alt, J.C. and D.A.H. Teagle. Probing the TAG Hydrothemal mound and stockwork:
Oxygen isotope profiles from deep ocean drilling. EOS, Trans. AGU, 77, F764.
Chan, L., J.C. Alt, and D.A.H. Teagle. Alterations of the upper 1.8 km of
oceanic crust: A lithium isotope record at ODP Site 504B. EOS, Trans. AGU,
77, F805.
Honnorez, J.C. Alt, and S. Humphris. Active and fossil hydrothermal alteratinos
of basalt beneath and within the TAG hydrothermal mound. EOS, Trans. AGU,
77, F763.
Humphris, S.E., J.C. Alt, D.A.H. Teagle, and J. Honnorez. Geochemical changes
during hydrothermal alteration of basement in the stockwork beneath the TAG
active hydrothermal mound, ODP Leg 158. EOS, Trans. AGU, 77, F764.
Teagle, D.A.H., J.C. Alt, and A.N. Halliday. Dissecting an active hydrothermal
deposit: The strontium and oxygen isotopic anatomy of the TAG hydrothermal
mound. EOS, Trans. AGU, 77, F764.
Teagle, D.A.H., J.Alt, and A. Halliday. Tracingthe chemical evolution of
hydrothermal fluids during recharge as recorded by anhydrite from DSDP/ODP
Hole 504B. In: The oceanic lithosphere and scientific drilling into the 21st
century, ODP-Interridge-IAVCEI workshop report, Woods Hole, MA. p. 110.
1995
Alt, J.C., and T.S. Brewer, Submarine alteration and mineralization of volcanic
basement from the Izu-Bonin forearc: comparison with MORB and ophiolite sections,
EOS, Trans. AGU, 76: F710.
Teagle, D.A.H., J.C. Alt, and A.N. Halliday, Tracing the chemical evolution
of hydrothermal fluids during recharge as recorded by anhydrite from Hole
504B, EOS, Trans. AGU, 76: F709.
Alt, J.C., and Teagle, D.A.H., Measurement of Fractures in the Upper
Oceanic Crust. In: Faulting and Magmatism at Mid-Ocean Ridges, RIDGE Thoretical
Institute short course notes: O, p.4 (abstract).
1994
Alt, J.C., D.A.H. Teagle, W. Bach, A.N. Halliday, and J. Erzinger, Alteration
in a ridge flank hydrothermal upflow zone: Strontium and oxygen isotopic
constraints from ODP Hole 896A. EOS, Trans. AGU, 75: 706 (abstract)
Teagle, D.A.H., J.C. Alt, W. Bach, A.N.Halliday, and J. Erzinger, Tracing
fluid-rock interaction in the upper oceanic crust: Strontium isotopic constraints
from DSDP/ODP Hole 504B, EOS, Trans. AGU, 75: 707 (abstract).
Bickle, M.J., J.C. Alt and D.A.H. Teagle. Sulphur transport and sulphur
isotope fractionation in ocean floor hydrothermal systems. Gosdschmidt Conference,
Edinburgh. (abstract)
1993
Alt, J.C. and the Leg 148 Scientific Party. Probing the Layer 2/Layer 3 Transition
in Hole 504B, ODP Leg 148. EOS Trans. AGU. v. 74 no 43: 645 (abstract).
Alt, J.C. Subseafloor processes affecting mineralization. RIDGE Theoretical
Institute Short Course, Physical, Chemical, Biological and Geological Interactions
within Seafloor Hydrothermal Systems, Big Sky, MT: H1-H2.
Dick, H.J.B., J. Erzinger, L. Stokking, and the Leg 140 Scientific Party.
Drilling to the Layer 2-3 boundary at Hole 504B. EOS Trans. AGU. v.
74 no 43: 604 (abstract).
Fisk, M.R., R.L. Nielsen, and the Leg 148 Shipboard Scientific Party. Cumulates
in the oceanic crust: an estimate of mineral abundance
and bulk composition. EOS Trans. AGU. v. 74 no 43: 645 (abstract).
Laverne, C., P. Tartarotti, J.C. Alt, D.A. Vanko, and the ODP Leg 140 shipboard
party. Chemistry and geothermometry of amphibole, chlorite, and mixed-layer
chlorite-smectite from the deep sheeted dike complex, DSDP-ODP Hole 504B
(Eastern Pacific). European Union of Geosciences VII, Strasbourg, France
(abstract).
McNeill, A.W., and the Legs 140 and 148 shipboard scientific parties. ODP
Legs 140 and 148: Deepening the Hole 504B "Reference Section" to the layer2/3
transition. IAVCEI (abstract), Canberrra, Australia.
Vanko, D., C. Laverne, P. Tartarotti, and J.C. Alt. Alteration minerals in
the lower sheted dikes, Hole 504B: Increased T and Ca-enriched fluids on-axis
at the base of Layer 2. EOS Trans. AGU, v. 74 no 43: 645 (abstract).
1992
Alt, J.C. Hydrothermal alteration of a 2 km reference section of upper ocean
crust, DSDP/ODP Hole 504B. IGCP Project 294: Very low grade metamorphism.
The transition from basalt to metabasalt: Environments, processes, and petrogenesis.
Abstracts and program, p. 6.
Alt, J.C., and D. Vanko. Hydrothermal alteration of the lower sheeted dike
complex, ODP Hole 504B: approaching the dike-gabbro transition. EOS, Trans.
AGU. 73, no. 43: 255 (abstract).
Appold, M.S., S.E. Kesler, and J.C. Alt. Sulfur isotopic study of Missippi-Valley-Type
mineralization in the central and southern Applachians. Geol. Soc. Am. Ann.
Mtg., Abstracts with Programs, (abstract).
Pezard, P., R.N. Anderson, W.B.F. Ryan, K. Becker, J.C. Alt, and P. Gente.
Accretion, structure and hydrology of intermediate spreading-rate oceanic
crust and the role of massive flows. EOS, Trans. AGU 73, no. 14,:274 (abstract)
Magenheim, A.J., J.M. Gieskes, G. Bayhurst, and J.C. Alt. Oceanic borehole
fluid chemistry from Site 504B: Seawater-rock reaction within the borehole
environment. Seventh Internat. Symp. Water-Rock Interact., Parks City, Utah
(abstract).
Vanko, D.A., H.J.B. Dick, J.C. Alt, D.S. Kelley, and Leg 140 Shipboard Party.
Hydrothermal alteration deep within sheeted dikes, DSDP/ODP Hole 504B, Eastern
EquatorialPacific. RIDGE theoretical institute, Tucson, AX, Abstracts, p.
29 (abstract).
1991
Alt, J.C., C. France-Lanord, A. Galy, P.A. Floyd and P. Castillo. Low
temperature hydrothermal alteration of Jurassic ocean crust. EOS Trans.
AGU, 72:453 (abstract).
Alt, J.C., and J.W. Burdett. Sulfur in Pacific deep-sea sediments,
ODP Leg 129, and implications for cycling of sediment in subduction zones.
Geol. Soc. Am. Ann. Mtg., Abstracts with Programs (Abstract).
Boni, M., J.C. Alt, G. Balassone and A. Russo, Stratabound ores at the Mid-Ordovician
unconformity in SW Sardinia: Depositional environment and isotopic
characteristics. UNESCO Symposium: Geologia del Basamento Italiano
(Abstract).
Karpoff, A.M., B.C. France-Lanard, J. Duplay, J.L. Crovisier, and J. Alt.
La paragenese d'alteration inusuelle a thaumasite des tuffs Miocenes du bassin
des Mariannes (Site 802, Leg 129). Bull. liason Soc. fr. Miner. Cristal.,
2: 40 (Abstract).
Magenheim, A.J., G. Bayhurst, J.C. Alt, and J.M. Gieskes. Borehole
fluid chemistry in DSDP/ODP Hole 504B: An investigation of in situ
water/rock reaction. EOS, Trans. AGU, 72:539 (abstract)
1990
Alt, J.C., The geochemistry of sulfur in oceanic and ophiolitic crust.
Symposium on ophiolite genesis and evolution of oceanic lithosphere.
Muscat, Oman.
Alt, J.C., A sulfur isotopic profile through the Troodos Ophiolite, Cyprus.
Geol. Soc. Am. Ann. Mtg., Abstracts with programs (Abstract).
Alt, J.C., Crustal alteration from the perspective of Ocean Drilling.
EOS, Trans. AGU (Abstract).
Boni, M., J. Alt, A. Arribas, and T. Bechstadt. The stratabound ores
of the Aracena Belt: Depositional environment and isotopic characteristics,
Eleventh Mtg: Geology of the Western Peninsula. Huelva, Spain
(Abstract).
Jones, H.D., S.E. Kesler, and J.C. Alt, Sulfur isotopes in central Appalachian
MVT mineralization. Geol. Soc. Am. Ann. Mtg., Abstracts with programs
(Abstract).
1989
Alt, J.C., and W.C. Shanks, Sources and cycling of sulfur in subduction zones:
The Mariana Island Arc and back-arc Trough. Geol. Soc. Am. Ann. Mtg.,
Abstracts with programs (Abstract).
Alt, J.C., The petrology of sulfides and sulfur contents of oceanic gabbros.
Drilling the oceanic lower crust and mantle. Woods Hole Oceanogr. Tech.
Rept. WHOI-89-39 (Abstract).
1988
Alt, J.C., Hydrothermal mixed-layer illite-smectite in recent massive sulfide
deposits from the seafloor. Geol. Soc. Amer. Ann. Mtg., Abstracts with
Programs (Abstract).
Alt, J.C., and T.F. Anderson, The distribution of sulfur in the oceanic crust,
DSDP/ODP Holes 504B and 735B. EOS, Trans. AGU, 69; 1402 (Abstract).
Hannington, M.D., P.M. Herzig, and J.C. Alt, The distribution of gold in
sub-seafloor stockwork mineralization from DSDP Hole 504B and the Agrokipia
B deposit, Cyprus, Geol. Assoc. Can. annual meeting (Abstract).
1987
Alt, J.C., T.. Anderson, L. Bonnell, Geochemistry of sulfur in hydrothermally
altered seafloor rocks, Geol. Soc. Amer. Ann. Meeting, Abstracts with programs,
19(7); 570 (Abstract).
Alt, J.C., T.F. Anderson, and L. Bonnell, The mobility of sulfur during hydrothermal
metamorphism of the oceanic crust, EOS, Trans. AGU, 68: 1546 (Abstract).
Allan, J.F., R. Batiza, R. Haymon, T. Smith, and J. Alt, Observed relations
between fractionated basalts and hydrothermal processes on near-EPR axis
seamounts, EOS, Trans. AGU, 68: 1540 (Abstract).
1986
Alt, J.C., A hydrothermal/bacterial iron deposit from a seamount near 21˚N,
East Pacific Rise, Geol. Soc. Am. Ann. Mtg., Abstracts with Programs, 18(6);
526 (Abstract).
1985
Alt, J.C., Lonsdale, P., and Haymon, R., Hydrothermal deposits on seamounts
near 21˚N East Pacific Rise, EOS, Trans. AGU, 66: 921 (Abstract).
1984
Alt, J.C., The structure, chemistry and evolution of a submarine hydrothermal
system, DSDP Site 504, unpublished Ph.D. dissertation, University of Miami,
Miami, FL, 286 pp.
Batiza, R., Castillo, P., Alt, J., Simkin, T., Vanko, D., McNutt, M., Mottl,
M., Levin, L., Brett, R., ALVIN dives on four seamounts near the EPR-preliminary
geologic, volcanologic and petrologic results. EOS Trans. AGU, 65;
1078 (Abstract).
1983
Alt, J.C., Honnorez, J., Honnorez, B.-M., and Ruiz, J., Hydrothermal fluctuation
and formation of a sulfide-rich stockwork mineralization, DSDP Hole 504B,
EOS, Trans. AGU, 64(18): 240 (Abstract).
1982
Alt, J.C., Multi-stage Alteration of the Oceanic Crust, DSDP Hole 504B.
EOS, Trans. AGU, 63(45): 1116 (Abstract).
Alt, J.C., Honnorez, J., Hubberten, H.-W., and Saltzman, E., Anhydrite from
the Oceanic Crust, DSDP Leg 70, Hole 504B, Geol. Soc. Am. Ann. Mtg., Abstracts
with Programs, 14(7): 431 (Abstract).
1981
Alt, J.C., Alteration of the Upper Oceanic Crust, DSDP Site 417, M.S. Thesis,
University Miami, 116 pp.
Alt, J.C., and Honnorez, J., A Model for the Aging of the Upper Oceanic Crust
at Low Temperature, Geol. Soc. Am. Ann. Mtg., Abstracts with programs, 13(7):
395 (Abstract).
1980
Alt, J.C., and Honnorez, J., Extreme Heterogeneous Alteration of Layer 2
Basalts, DSDP Site 417, EOS, Trans. AGU, 61(46): 992 (Abstract).