Technical Team

Ed Walker PhD, P Geo.

Principal Consulting Geologist, New Enterprise Project & Nevada Exploration Program

Dr. Ed Walker is an independent consultant, and President of the geologic consulting firm, PetroLogic Inc. based in Lakefield, Ontario Canada.

Dr. Walker has over 30 years of technical and management experience in exploration and resource development of precious, base, and rare metal, and industrial mineral deposits. He has designed, managed and implemented mineral exploration programs to test the mineral resource potential of properties including, precious and base metal deposits; field mapping, sampling, and drilling, geochemical, textural, and mineralogical testing, design, implementation, and monitoring of QC and QA programs and, computer compilation and 3D modelling of mineral resource data, as well as process mineralogy, beneficiation, and predictive metallurgy, and geological and mineral resource characterization.

He is a Qualified Person, (QP) authorized to write NI 43-101 technical reports for mineral exploration and, is registered in good standing with the Association of Professional Geoscientists of Ontario, (APGO). Dr. Walker is a joint author of the NI 43-101 Technical Report Assessing the Au, Cu Porphyry Potential of Pershing Resources’ New Enterprise Project near Kingman Arizona.

Dr. Walker received his BSc in Geological Sciences with first class honors from Brock University in 1984 and completed his doctorate work at the University of Western Ontario in 1991.

Luis A. Vega, P.Geo

Luis A. Vega, P.Geo

Technical Consultant & Geologist, Arizona Exploration Program

Luis Vega is a senior geologist with over 40 years of experience in working for publicly traded mining companies involved in exploration for precious and base metals His work has focused on investigation of polymetallic and porphyry copper deposits, as well as porphyry gold and sedimented hosted gold deposits throughout North America and South America. Mr. Vega is bilingual speaker in Spanish and English, and has extensive experience in business negotiations in Latin America with both private and governmental entities. He has directed exploration programs in the US, Mexico, Costa Rica, Honduras and Argentina and conducted submittal evaluations in Panama, El Salvador, Nicaragua, Colombia, Ecuador, Peru, Venezuela, Brazil, Uruguay and Chile.

He has worked for or contracted with companies such as Utah International, Duval Corporation, and Battle Mountain Gold Company, (BMGC),. While at BMGC, he established an exploration office in Chile and discovered the Angelina Porphyry copper/gold occurrence, which was sold to Gold Fields Corporation. He also participated in the discovery and definition of El Higo epithermal gold deposit in the Dominican Republic and, the Casposo Epithermal gold deposit, Argentina. In Bolivia, he supervised and conducted the early geologic work at the Kori Kollo Mine resulting in the definition of over 8 million ounces of gold resource.

While with Utah International he assisted with the definition drilling of several poly-metallic exploration projects in Utah.

During his time with Duval Corporation as head of exploration at the Mineral Park Mine near Kingman, Arizona, Mr. Vega directed the exploration programs that resulted in identification of additional copper and molybdenum reserves. He also co-established and managed the exploration operation for Duval in Argentina. Duval is a division of Pennzoil Corporation.

Mr. Vega is a co-author of several technical papers including:

Geology and Ore Deposits at Mineral Park: Mohave County, Arizona by William H. Wilkinson, Jr., Luis Alfonso Vega and Spencer R. Titley, in Advances in Geology of the Porphvrv Copper Deposits. Southwestern North America, 1980.

Exploration in Lessor Explored Countries: A Geologist's Perspective by Kirk P. Kinart and Luis Alfonso Vega; in Mining Engineering, February 1993, Vol. 45 No. 2, pp 145147.

Cuerpo Subvolcanico en la Quebrada del Chorrillo, Nueva evidencia de mineralizacion en Cordillera Frontal; San Juan, Argentina by Gustavo Sotarello, Irma Belvideri, Ivan Grassi and Luis Vega, in XVI Geological Conference Abstracts, 1997.

Mr. Vega is a member/fellow of the Society of Economic Geologists (SEG) and the American Institute of Professional Geologists (AIPG) (Ret) He holds a Bachelor of Science degree in Geology and a Master of Science in Economic Geology from the University of Arizona, Tucson. 

Thomas E. Callicrate, P. Geo.

Thomas E. Callicrate, P. Geo.

Technical Consultant & Geologist, Nevada Exploration Program

Tom Callicrate is an independent consultant and Owner of Mountain Gold Claims, LLC, (MGC) a generative, mineral exploration and consulting company based in Reno, Nevada, USA.  Mr. Callicrate has over 35 years as an exploration geologist, focused primarily on generating and conducting grass-roots exploration in the Great Basin of the Western US with a primary focus on Nevada.  He has done exploration work in Alaska, Honduras and Venezuela.  Mr. Callicrate has wide experience in exploring for precious metals systems, including gold, silver and platinum group metals, placer gold deposits, base metals-massive sulfide systems, diamonds, gemstones and industrial minerals. 

Discoveries credited to or, participated in, by Mr. Callicrate, include the Lincoln Hill gold-silver deposit in north-central Nevada of which he is an owner. The Lincoln Hill Project also includes an unusual, industrial-semi-precious gem mineral deposit that Mr. Callicrate is developing as a separate commercial asset. Other discoveries he personally made or assisted with include the Gemfield, Midway and Castle gold-silver deposits in south-central Nevada; Midas, Big Springs and Wood Gulch gold deposits in northern Nevada; Cahuilla gold-silver deposit in southern California and Eureka Creek Ni-Cu-Co-PGE deposit in central Alaska.

Mr. Callicrate began his career working as a field exploration geologist for several major and junior companies, including Freeport Exploration, FMC, Romarco Minerals, Electrum Resources, AuEx Ventures-Renaissance Gold, US Borax, and Kennecott Exploration. After building a strong base of field exploration skills, Mr. Callicrate moved on to get involved as co-founder and in senior corporate levels with start-up junior mining companies, such as Western Goldfield (TSX:WGI/OTC-BB:WGD) He was instrumental in the acquisition and development of Western Goldfield’s +4m oz. Mesquite gold deposit which was acquired from Newmont Mining.  Western Goldfields was able to advance the Mesquite Project and ultimately merged with New Gold Inc.,(NYSE-AMEX::NGD) which resulted in a substantial gain for its shareholders. 

Currently, Mr. Callicrate is working through his private company (MGC) and his extensive Nevada database focusing on generating quality gold-silver projects and leasing these properties to junior and major exploration and mining companies.  Mr. Callicrate also continues to perform consulting project management and geologic field work for a number of junior and major exploration and mining companies including Coeur Mining and Orla Mining focused on mapping, sampling and drilling to discover world class, economic precious metal deposits.    

Mr. Callicrate is a Qualified Person (QP) and Professional Geologist (P. Geo) with American Institute of Professional Geologists and holds a Bachelor of Science degree in Geology from Southern Oregon State University, Ashland, Oregon.

Nicholas R. Barr

Consulting Geologist, New Enterprise Project & Nevada Exploration Program

Nick Barr is an independent consulting geologist with over 35 years of experience, working with numerous public and private companies in the mineral exploration business. He has worked for or contracted with companies such as, J.H. Montgomery Consultants, Cambior Exploration USA, St. Joe Gold, Technica Group Inc. and GeoXplor Corp., among others. His work has primarily focused on gold-silver and base metals, and including massive sulfides, chromite, uranium, lithium, and industrial/rare earth metals, mostly in Arizona, Nevada, Idaho, Utah, California and Oregon.

Mr. Barr's experience includes target generation, land work, permitting and reclamation, surface and underground mapping, grid soil, mobile metallic ion (MMI) and biogeochemical sampling, and supervision/logging of rotary, RC and core drilling. He has remained active brokering and evaluating mineral properties in western U.S. and managing crews for all phases of mineral exploration.

He has a strong personal interest in gold-silver exploration and small, high-grade mine development. As a private contractor, Nick has owned and operated a Simco 4000 track mount drill and, authored/co-authored NI 43-101 compliant reports. Early work experience included three years of Federal Agency geotechnical investigation work, including extensive slope stability studies.

Mr. Barr holds a Bachelor of Science degree in Geology from Southern Oregon State University, Ashland, Oregon.

Donald J. McDowell, PLS

Consultant for Exploration and Project Management

Don McDowell is a consultant to the Pershing Resources on exploration strategy and project management. Mr. McDowell has over 30 years of geological exploration, property evaluation, and development experience primarily focused in the mineral exploration industry in Nevada.  Since 2008, Don has served as the founding President of Americas Gold Exploration Inc., a private company dedicated to Nevada mineral exploration.  In late 2017, he was instrumental in the acquisition of the Carlin Vanadium Property by Cornerstone Metals, as well as, having established ongoing joint ventures on major advanced exploration and development stage copper-gold projects in the Carlin, Eureka and Battle Mountain districts of Nevada with  Barrick, McEwen Mining and Timberline Resources. He is a director on the board of Timberline Resources, (OTCQB: TLRS; TSX-V: TBR). Previously, Don’s experience includes 17 years with major corporations including Nippon Mining of Japan, Santa Fe Pacific Gold and Kennecott Exploration, where he was involved in exploration, resource/reserve evaluations and mine development. Mr. McDowell is a registered professional land surveyor in the state of California and has proven exploration and development expertise in advancing gold and copper projects.