Dept. of Geological and Environmental Sciences
Stanford University
Stanford, CA, 94305-2115, U.S.A.
Phone: (415) 723-2537
Fax: (415) 725-2199
munt@pangea.stanford.edu

Stanford University, Dept. of Geological and Environmental Sciences, Stanford, CA
Doctor of Philosophy in Geology, expected July 1997, Advisor: Marco Einaudi
Dissertation: "Magmatic-Hydrothermal Gold Deposits of the Maricunga Belt, Northern Chile"

University of Michigan, Dept. of Geological Sciences, Ann Arbor, MI
Master of Science in Geology, 1989, Advisor: Stephen Kesler
Thesis: "Evolution of the Monte Negro Acid Sulfate Gold-Silver Deposit, Pueblo Viejo, Dominican Republic: Important Factors in Grade Development"
Awards/Honors: National Science Foundation Graduate Fellowship, 1987-1989
University of Michigan Regent's Fellowship, 1986-1987

Purdue University, Dept. of Earth and Atmospheric Sciences, West Lafayette, IN
Bachelor of Science in Geology with Honors, 1986, Advisor: Robert Loucks
Senior Thesis: "Gold Mineralization in Proterozoic Shear Zones, Medicine Bow Mountains, Wyoming"
Awards/Honors: Phi Beta Kappa 1986
Nominated for Senior of the Year, School of Science, 1986
W.A. Tarr Award (Sigma Gamma Epsilon - Geoscience Honors Society), 1985
Golden Key National Honor Society, 1985
School of Science Professorial Assistantship, 1982-1984

Stanford University, Dept. of Geological and Environmental Sciences, Stanford, CA 1992-Present

Developed a genetic model for porphyry gold deposits, a new class of ore deposits recently discovered in the high Andes of northern Chile, based on detailed geologic mapping and logging of drill core from four separate porphyry gold deposits and petrographical and analytical methods including optical microscopy, the electron microprobe, x-ray diffraction and x-ray fluorescence.

Evaluated time-space relations between hypabyssal intrusions and varous types of associated hydrothermal alteration and mineralization by documenting cross-cutting relationships and 40Ar-39Ar dating.

Tested hypotheses concerning the partitioning of copper and gold in magmatic-hydrothermal systems by employing thermodynamic phase equilibria and aqueous geochemistry constrained by fluid inclusion thermobarmetry and mineral assemblages identified by petrographical methods.

Secured funding for field work from mining companies and assisted in writing a successful National Science Foundation proposal to help fund my research and salary at Stanford.

University of Michigan, Dept. of Geological Sciences, Ann Arbor, MI 1986-1989

Investigated time-space relations between gold mineralization and advanced argillic hydrothermal alteration and identified principal geologic and geochemical controls on gold grade development in the Monte Negro orebody at the Pueblo Viejo gold mine in the Dominican Republic. Methods employed included logging of drill core, optical microscopy, the electron microprobe, x-ray diffraction, x-ray fluorescence, and thermodynamic phase equilibria and aqueous geochemistry including reaction path computer modeling.

Conducted hydrogen and oxygen isotope analyses at the University of Wisconsin and University of Michigan stable isotope laboratories and evaluated the relative importance of magmatic, meteoric, and seawater sources of hydrothermal fluids at Pueblo Viejo.

Purdue University, Dept. of Earth and Atmospheric Sciences, West Lafayette, IN 1984-1986

Investigated processes of formation of Proterozoic gold lodes and their relationship to the metamorphic history of the Medicine Bow Mountains. Methods employed included optical microscopy, fluid inclusion thermobarometry, electron microprobe analysis, thermodynamic phase equilibria and aqueous geochemistry.

Geologist, Amax Gold Inc., Englewood, CO, Supervisor: Neil Muncaster 1993-1995

Completed field study component of my dissertation research in a remote location in the high Andes of northern Chile. Mapped over 10 km of road cuts at three separate gold deposits at a 1:1000 scale and logged about 4000 m of drill core.

Geologist, Santa Fe Pacific Mining Inc., Reno, NV, Supervisor: Ronald Parratt 1989-1993

Managed and performed all phases of precious metal exploration in Nevada including regional reconnaissance and detailed prospect evaluation.

Participated in a regional helicopter-based stream sediment sampling program, mapped and sampled prospects, synthesized large data sets, generated drill targets, formulated budgets, managed both rotary and core drilling programs, logged rotary chips and drill core, delivered recommendations, supervised consultants, and guided a summer student intern.

Associate Geologist, Atlas Precious Metals, Inc., Sparks, NV, Supervisor: Frank Fenne 1988

Logged rotary chips from gold deposits in Nevada and Oregon, mapped and sampled prospects.

Geologist, United States Geological Survey, Menlo Park, CA, Supervisor: James Rytuba 1986

Summer internship awarded by National Association of Geoscience Teachers and U.S.G.S. based on outstanding performance at Indiana University geologic field camp.

Mapped and assessed mineral potential of wilderness study areas in southeastern Oregon and northern Nevada.

Teaching Assistant, Stanford University, Dept. of Geological and Environmental Sciences 1992-1993

Mineralogy, Fall 1992, Professor: Gordon Brown. Taught laboratory section, developed laboratory exercise in optical mineralogy, graded problem sets.
Introductory Geology, Winter, Spring 1993, Professors: Juhn Liou and Gordon Brown. Taught laboratory sections, led field trips, graded problem sets and exams.

Instructor, Academy of Art College, Liberal Arts Program, San Francisco, CA 1996

Introduction to Physical Geography, Fall 1996, Sole instructor of a geography course that is being offered for the first time. Developing syllabus, lectures, assignments, map exercises, quizzes, exams, class projects, and grading schemes. Course covers all aspects of physical geography including map skills, meteorology, hydrology, and geology.

Supervisor: Sue Rowley

Geological Society of America

Society of Economic Geologists

Peer-Reviewed Journal Articles

Muntean, J. L., Kesler, S. E., Russell, N., and Polanco, J., 1990, Evolution of the Monte Negro acid-sulfate Au-Ag deposit, Pueblo Viejo, Dominican Republic: Important factors in grade development: Economic Geology, v. 85, p. 1738-1758.

Venneman, T. W., Muntean, J. L., Kesler, S. E., and O'Neil, J. R., Valley, J. W., Russell, N., 1993, Stable isotope evidence for magmatic fluids in the Pueblo Viejo epithermal acid-sulfate Au-Ag deposit, Dominican Republic: Economic Geology, v. 88, p. 55-71.

Abstracts (oral presentations at national and international conferences except where noted)

Muntean, J. L., 1997, Descriptive Exploration Model For Porphyry Gold Deposits: An Update from the Maricunga Belt, Northern Chile [abs.]: AIME/SME Annual Meeting Abstracts. (accepted).

Muntean, J. L., and Einaudi, M. T., 1996, Evolution of porphyry copper-gold mineralization to low-sulfidation epithermal gold mineralization, Maricunga belt, northern Chile [abs.]: Geological Society of America. (accepted)

Muntean, J. L., 1995, Magmatic-hydrothermal gold deposits at Refugio, Maricunga belt, northern Chile [abs.]: in Geological Society of Nevada, U.S.G.S., and Sociedad Geologica de Chile, Symposium on the Geology and Ore Deposits of the American Cordillera Program with Abstracts, Reno, Nevada, p. A56-A57. (poster presentation)

Muntean, J. L., 1992, Pueblo Viejo, Dominican Republic: a world class magmatic-hydrothermal, epithermal, acid-sulfate gold deposit associated with a maar-diatreme complex [abs]: in Randol International Gold Conference Program with Abstracts, Las Vegas, Nevada. (invited paper)

Venneman, T. W., Muntean, J. L., Kesler, S. E., O'Neil, J. R., and Valley, J. W., 1991, Stable isotope evidence for magmatic fluids: Pueblo Viejo acid-sulfate Au-Ag deposits, Dominican Republic [abs.]: Geological Society of America, Progaram with Abstracts, v. 23, pA229. (I gave the presentation.)

Muntean, J. L., Kesler, S. E., Russell, N., 1990, Exploration models for acid-sulfate, epithermal Au deposits [abs]: AIME/SME Annual Meeting Abstracts.

Kesler, S. E., and Muntean J. L., 1990, Acid-sulfate gold-silver deposits in Greater Antilles [abs]: Geological Society of Canada, v. 15, p. 60. (Kesler gave the presentation)

Muntean, J. L., Kesler, S. E., and Valley, J. W., 1988, Evidence for fluid mixing during mineralization, Monte Negro Au-Ag deposit, Pueblo Viejo, Dominican Republic [abs.]: Geological Society of America, Program with Abstracts, v. 20, p. A301.

Kesler, S. E., Muntean, J. L., and Russell, N., 1988, Spatial and temporal zoning of acid-sulfate alteration and mineralization, Pueblo Viejo gold-silver district, Dominican Republic: Bicentennial Gold 88 Extended Abstracts Oral Programme, Melbourne, p. 173-176. (I gave the presentation.)

Muntean, J. L., and Loucks, R. R., 1986, Gold mineralization in Proterozoic ductile shear zones, Keystone district, Medicine Bow Mountains, Wyoming [abs.]: Geologic Society of America, Program with Abstracts, Rocky Mountain Section, v. 18, p. 398.

Papers in Preparation

Einaudi, M. T., Muntean, J. L., and Marsh, T., Porphyry-Epithermal Transition: Evidence from the Andes of Northern Chile, Society of Economic Geologists Special Issue on the Ore Deposits of the Andes.

Key References

Marco Einaudi, Professor
Dept. of Geological and Environmental Sciences
Stanford University
Stanford, CA 94305
415-723-0575

Stephen Kesler, Professor
Dept. of Geological Sciences
1006 C.C. Little Building
University of Michigan
Ann Arbor, MI, 48109
313-763-5057

Dennis Bird, Professor
Dept. of Geological and Environmental Sciences
Stanford University
Stanford, CA 94305
415-723-1664

Additonal References

James Rytuba, Senior Geologist
United States Geological Survey
345 Middlefield Road 94025
Menlo Park, CA
415-329-5418

James O'Neil, Professor
Dept. of Geological Sciences
1006 C.C. Little Building
University of Michigan
Ann Arbor, MI, 48109
313-764-1435

Robert Loucks, Research Associate
Research School of Earth Sciences
Australian National University
Canberra, A.C.T. 0200
Australia

Ronald Parratt, Vice-President of Exploration
Santa Fe Pacific Mining Corp.
6200 Uptown Blvd., Suite 400
Albuquerque, NM 87110
505-880-5300

Antonio Arribas Jr., Exploration Geologist
Placer Dome Inc.
2085 Hamilton, Suite 150
San Jose, CA 95125
408-377-3538