Ulysses S. "Trey" Hargrove, III, M.S., Ph.D.


ADEXCO Production Company
ADEXCO Operating Company
309 W. 7th St., Suite 400
Fort Worth, TX  76102

Office/Voicemail: (817) 332-3891 x206
Fax: (817) 332-3894
Email: trey@adexco.net


Click for my Academic and Professional History
    Academic Research

  1. Research for my doctoral degree in the Department of Geosciences at the University of Texas at Dallas focused on developing a comprehensive model of the evolution of continental crust in the Neoproterozoic by studying island-arc and potential oceanic-plateau terranes in the western Arabian shield. Detailed isotopic, geochemical, petrological, and structural analyses of major volcanic and plutonic units along the flanks of the Neoproterozoic Bi'r Umq Suture Zone in Saudi Arabia will be used to identify and characterize the nature and evolution of magmatic systems in a juvenile intraoceanic arc setting. Part of the study also involves the identification of units or terranes that represent accreted oceanic plateaux or other remnants of a manlte plume that were involved in the rapid generation of the Arabian-Nubian Shield. This project is funded by a grant from the National Science Foundation to my supervisor, Dr. Robert J. Stern, a grant from the Geological Society of America to myself, and the support of the Saudi Geological Survey.

    2. Click on Project Summary to read the details of the research grant proposal.

  2. I have been involved in an ongoing research on the active tectonics, volcanology, geomorphology, and geochemical cycling in the Izu-Bonin-Mariana (IBM) arc and back-arc system. Two cruises were undertaken as part of different projects. The first cruise in Mar-Apr 2001 was aboard the R/V Melville and involved HMR-1 high-resolution bathymetric and side-scan sonar surveys, SeaBeam bathymetric surveys, and 77 dredges of active and extinct volcanic centers along the arc axis and cross-chains as well as the back-arc basin spreading axis. This cruise was funded by an NSF grant to my supervisor, Dr. Robert J. Stern, and to Dr. Sherm Bloomer (Oregon State University), as part of the Subduction Factory experiment of the NSF MARGINS program.

    3. The second cruise in June 2004 aboard the Japanese ship M/V Yokosuka involved SeBeam bathymetric surveys along of the Ogasawara (Bonin) Ridge and four dives along the western escarpment of the Ogasawara Ridge using the manned submersible DSV Shinkai 6500. The dives recovered samples from the western flanks of the Ogasawara ridge that will be used to investigate the composition and crustal structure of the earliest arc crust in the IBM system, exposed here along steep scarps associated with early uplift and faulting of the Ogasawara arc. This project was funded by a grant from the Japanese Marine Science and Technology Center (JAMSTEC) to Yasuhiko Ohara (Hydrographic and Oceanographic Department of Japan) and Sherman Bloomer.

  3. Stemming from work conducted for my M.S. thesis in the Geology Department at Texas Christian University, I am also currently involved in a project exploring the geochemical and isotopic (Nd, Sr) evolution of Neoproterozoic supracrustal rocks and Neoproterozoic to Paleoproterozoic middle-crustal basement granitoids and lower-crustal granulites in part of the Neoproterozoic Zambezi Orogenic Belt in northeastern Zimbabwe. This project is in collaboration with my former M.S. supervisor, Dr. Richard E. Hanson, and several scientists in the Department of Geosciences at UT Dallas.

Click on Bibliography to see a list of my publications

    Major Field Experience

  1. 2001-2003 Reconnaissance structural, petrological, volcanological, isotopic, and geochemical studies of Neoproterozoic juvenile volcanic arc, ophiolitic, and potentially mantle-plume-related igneous units in the Arabian Shield along the Pan-African Bi'r Umq Suture Zone, Saudi Arabia (6 months).

  2. 1997 Reconnaissance field mapping, structural, petrological, geothermobarometric, isotopic, and geochemical studies of Neoproterozoic to Paleoproterozoic supracrustal, granitoid, and lower-crustal granulite-facies basement rocks in the Pan-African Zambezi Orogenic Belt, Zimbabwe (1.5 months).

  3. 1995 Detailed field mapping and volcanological study of a large-scale peperite complex associated with a multiphase andesitic sill intruded into wet, unconsolidated Jurassic arc-apron sediments, Northern Sierra terrane, California, USA (1 month).

    Shipboard Experience

  1. 2004 R/V Yokosuka (Japan) - Manned submersible dives in the DSV Shiknai 6500 and SeaBeam bathymetric mapping of the Ogasawara Ridge, Ogasawara Islands, Japan (8 days).

  2. 2001 R/V Melville (USA) - SeaBeam and HMR1 high-resolution bathymetric and side-scan sonar mapping and tow-dredging of the southern Mariana seamount province, Mariana Islands and Guam, USA (1.5 months).


      3. Grants and Awards

    1. National Science Foundation / Japan Society for the Promotion of Science Graduate Research Fellow, East Asian and Pacific Summer Institutes Program - Japan, 2004.

    2. National Science Foundation Grant EAR0309799, Petrology and Geochemistry, awarded to Robert J. Stern, supporting doctoral research of Ulysses S. Hargrove, University of Texas at Dallas, 2003.

      Click on Project Summary to see details of the research grant proposal.

    3. Geological Society of America Grant 7151-02, awarded to Ulysses S. Hargrove, University of Texas at Dallas, 2002.