Arizona Mineral Districts v. 4 Graham and Greenlee Counties by Jan C. Rasmussen and Stanley B. Keith was recently released in March 2025.

Paperbacks or hardbacks copies of this publication can be ordered through Amazon.com.  Search for Arizona Mineral Districts.

Describing the geology, mineralogy, age dates, location, and production, it  is profusely illustrated with 1:62,500 scale topographic maps, mineral photographs, and geologic maps and diagrams.

Nirio Mendoza Inca, Colorado School of Mines, Geology and Hydrothermal Alteration of Red Mountain Lithocap, Eastern Lake City Caldera, Hinsdale County, Colorado, U.S.A. (59 minutes)

Long-time AGS member Richard (Dick) Jones has recently submitted a paper on Laterite-Hosted Gold Deposits.  This interesting article can be viewed at this link.

Mark Holland, Ph.D. Arizona Geological Survey, The Ghost of Sutures Past: A Re-evaluation of the Yavapai-Mazatzal Province Boundary in Central Arizona (59 minutes)

AGS regrets to inform its members that James Briscoe, exploration geologist and mining prospector/developer, passed away in Tucson in November 2024. Jim graduated from Catalina High School in Tucson and received his college education at The University of Arizona including a BA.Sc and M.S. in geology and economic geology. He was a member of the Kappa Sigma fraternity.

He worked as an ASARCO geologist at the Silver Bell operation from 1965 to 1968 and helped to discover significant additional ore reserves. James Brisco founded JABA U.S., Inc. in 1995 to evaluate and develop mineral exploration properties. He was the co-founder of Liberty Gold Corp. (later reorganized as Liberty Star Uranium & Metals Corp) (resigned as Director in 2019).  James also served as the Director of Mayo Gold from 2008 to 2010.  He used both traditional and innovative technology methods to explore for mineral resources in Arizona, Alaska, and Nevada. He was an early adopter of the ZTEM (Z-Axis Tipper Electromagnetic) surveying technology.

James Briscoe was a long-time member of AGS and the Tucson chapter of SME and was both an Arizona-registered Professional Geologist (9424) and a California-registered Professional Geologist (518).  He encouraged his colleagues to seek state licensing certification to raise the professionalism and respect for those in exploration and mining geology careers. James is survived by his wife, Mardee Briscoe. No service was held.

Brian Gootee and Tawnya Wilson, Arizona's Deep Subsurface: Exploring energy Resiliency through Gas Storage, Mineral-Sequestration, and Geothermal Energy.  This 65 minute presentation include 10-minutes of Q&A.

Steve Reynolds, Ph.D., “Untangling the stratigraphy of the upper Paleozoic Supai and Naco Groups of the Mogollon Escarpment,” recorded 3 Dec. 2024. The 67-minute presentation includes 20-minutes of Q&A 

Guido Merino and Priscilla R. Martinez

On 4 December 2024, the AGS Scholarship Committee 2024 announced the awardees of the J. Harold Courtright ($3,000) and the M. Lee Allison ($3,000) scholarships. This year’s review committee comprised Sterling Cook (AGS Councilor) and Michael McCarrel (AGS Secretary). Sterling was on hand to present the awards.

Guido Merino

The winner of the J. Harold Courtright scholarship, which focuses on economic geology, is Guido Merino.  Guido is an M.S. candidate at the University of Arizona working on the ore chemistry of an epithermal-porphyry system in the Vicuna Belt of Argentina. He earned an Honors Degree in Geological Sciences from the University of Buenos Aires in July 2017.

Priscilla R. Martinez

The winner of the M. Lee Allison scholarship, Priscilla R. Martinez, is a Ph.D. candidate at the University of Arizona. Her dissertation research involves an interdisciplinary study to characterize the interplay between Cenozoic climatic-biotic events and Andean volcanism along the western South American margin.

Priscilla earned a B.S. in Geology at California State University- Northridge in 2022, and M.S. in Geology from California State University-Fullerton.

Born on January 12, 1932 in Spokane, Washington, Ted Eyde recently passed away in Tucson on November 15, 2024 at the age of 92.  Ted graduated from Montana College of Mineral Science and Technology with a Master's degree in Geological Engineering (1957), a field he dedicated over six decades of his life.

Ted was an active member in the mining industry and affiliated with numerous professional organizations; including the Mining Metallurgy and Exploration of AIME, the Tucson Section of the American Institute of Mining, Metallurgical, and Petroleum Engineers, Southwestern Minerals Exploration Association, Arizona Council of Engineering and Scientific Associations, American Institute of Professional Geologists, Arizona Geological Society, and New Mexico Geological Society. He was an expert in his field with over seventy publications and discovered one of the world’s largest zeolite (i.e., chabazite) deposits north of Bowie, Arizona in 1961 while working for Union Carbide.

A lifetime member, Ted joined the Arizona Geological Society in 1959, and served on its Investment Committee.  He was instrumental in getting the Arizona Geological Society’s two scholarship funds separated from the general fund, insuring the interest from these investments would fund all future scholarships.  Ted also authored two AGS industrial minerals field trip guidebooks in 1986 and 1992.

A Funeral Mass will be held on December 7, 2024, at 10:30 a.m. at St. Odilia Church, 7570 N. Paseo del Norte, Oro Valley, Arizona.

Articles contained within the Arizona Geological Society Digests 1 through 22 are now available on-line at our publications page.  Our out-of-print Digests are available to the public, While our in-print Digests are only accessible to AGS members. 

Anyone who is interested in purchasing Printed Copies of In-Print AGS Digests can do so on-line or contact the AGS Secretary for more details.  Copies of current AGS Guidebooks and Digests are also for sale at a reduced price at AGS monthly dinner meetings.