Pinto Valley

Deposit with commodities copper, molybdenum, rhenium, gold, silver

More information at and near this site: Re-AZ00020

About this location

Feature ID Re-Mo00278
Geographic coordinates -110.96468, 33.409888
Point definition Approximate center of polygon
Polygon definition Plan View of Block Model at Elevation 3050' with 0.001-0.55 % Cu Grades
Reference Bush and others (2016); Figure 14-27
Date: 2016; Scale: Large (>1:24,000)

Geologic information

Commodities copper; molybdenum; rhenium (1); gold; silver
Valuable materials chalcopyrite; molybdenite; pyrite
Associated materials chalcocite; biotite; quartz; sericite; magnetite; sphalerite; galena
Mineralization style veins; grains
Age of mineralization 59.1 Ma (1)
Host rock age Precambrian
Host unit name Lost Gulch
Host lithologies quartz monzonite; aplite; granite porphyry; diabase
Alteration potassic; argillic; sericitic; propylitic
Reference Bush, G., Hoag, C., Freiman, T.J., Kirkham, G., Major, K.W., and Marek, J., 2016, Pinto Valley Mine Life Extension - Phase 3 (PV3) Pre-Feasibility Study, NI 43-101 Technical Report, Pingo Valley Mine, Miami, Arizona: Prepared by Capstone Mining Corp., 193 p.
Additional references (1) Kirkham (2013)

Deposit models and geoenvironmental models

Type Model Reference
Deposit model Porphyry Cu-Au John, D.A., and Taylor, R.D., 2016, By-Products of Porphyry Copper and Molybdenum Deposits in Verplanck, P.L., and Hitzman, M.W., (eds), 2016, Rare Earth and Critical Elements in Ore Deposits: Society of Economic Geologists, Inc., Reviews in Economic Geology, Volume 18, p. 137-164.
Geoenvironmental model Porphyry Cu du Bray, E.A., 1995, ed., Preliminary compilation of descriptive geoenvironmental mineral deposit models: U.S. Geological Survey Open-File Report 95-831, 272 p.

Resource estimate summaries

Date Description Class Type Material Contained Units
1974 Reserve ore copper 3,080,000,000 pounds
2017 Mineral Resource Measured plus Indicated plus Inferred ore molybdenum 230,096,397 pounds
2017 Mineral Resource Measured plus Indicated plus Inferred ore copper 9,651,614,610 pounds
2017 Mineral Reserve Proven plus Probable ore copper 3,110,986,183 pounds
2017 Mineral Inventory Proven plus Probable ore molybdenum 90,318,954 pounds

Detailed resource estimates

1974: Reserve,
Year of estimate 1974
Resource description Reserve
Material copper
Material type ore
Material amount 350,000,000
Amount units tons
Grade 0.44
Grade units percent
Contained commodity 3,080,000,000
Contained commodity units pounds
Material amount SI 320,000,000
Material amount SI units metric tons
Grade SI 0.44
Grade SI units percent
Contained commodity SI 1,400,000
Contained commodity SI units metric tons
Short reference Jett and Miller (1976)Page 24
Reference Jett, H.J., (director), and Miller, G.A., (mineral resources specialist), 1976, A Profile of Arizona's Primary Copper Industry for 1974-1975, Volume 1: Arizona Department of Mineral Resources, 58 p.
2017: Mineral Resource, Measured plus Indicated plus Inferred
Year of estimate 2017
Resource description Mineral Resource
Resource classification Measured plus Indicated plus Inferred
Resource classification system SEC
Material molybdenum
Material type ore
Material amount 1,527,000,000(includes amounts of more than one commodity)
Amount units tonnes
Grade 0.007
Grade units percent
Contained commodity 230,096,397
Contained commodity units pounds
Material amount SI 1,527,000,000(includes amounts of more than one commodity)
Material amount SI units metric tons
Grade SI 0.007
Grade SI units percent
Contained commodity SI 104,370
Contained commodity SI units metric tons
Short reference Capstone Mining Corp (2017)Table 1
Reference Capstone Mining Corp., 2017, Annual Information Form For the year ended December 31, 2016, 87 p.
2017: Mineral Resource, Measured plus Indicated plus Inferred
Year of estimate 2017
Resource description Mineral Resource
Resource classification Measured plus Indicated plus Inferred
Resource classification system SEC
Material copper
Material type ore
Material amount 1,527,000,000(includes amounts of more than one commodity)
Amount units tonnes
Grade 0.29
Grade units percent
Contained commodity 9,651,614,610
Contained commodity units pounds
Material amount SI 1,527,000,000(includes amounts of more than one commodity)
Material amount SI units metric tons
Grade SI 0.29
Grade SI units percent
Contained commodity SI 4,377,900
Contained commodity SI units metric tons
Short reference Capstone Mining Corp (2017)Table 1
Reference Capstone Mining Corp., 2017, Annual Information Form For the year ended December 31, 2016, 87 p.
2017: Mineral Reserve, Proven plus Probable
Year of estimate 2017
Resource description Mineral Reserve
Resource classification Proven plus Probable
Resource classification system SEC
Material copper
Material type ore
Material amount 455,200,000(includes amounts of more than one commodity)
Amount units tonnes
Grade 0.31
Grade units percent
Cut-off grade 0.174999997
Cut-off grade units percent
Contained commodity 3,110,986,183
Contained commodity units pounds
Material amount SI 455,200,000(includes amounts of more than one commodity)
Material amount SI units metric tons
Grade SI 0.31
Grade SI units percent
Cut-off grade SI 0.174999997
Cut-off grade SI units percent
Contained commodity SI 14(calculated)
Contained commodity SI units metric tons
Short reference Capstone Mining Corp (2017)Table 2
Reference Capstone Mining Corp., 2017, Annual Information Form For the year ended December 31, 2016, 87 p.
2017: Mineral Inventory, Proven plus Probable
Year of estimate 2017
Resource description Mineral Inventory
Resource classification Proven plus Probable
Resource classification system SEC
Material molybdenum
Material type ore
Material amount 455,200,000(includes amounts of more than one commodity)
Amount units tonnes
Grade 0.009
Grade units percent
Cut-off grade 0.174999997
Cut-off grade units percent
Contained commodity 90,318,954
Contained commodity units pounds
Material amount SI 455,200,000(includes amounts of more than one commodity)
Material amount SI units metric tons
Grade SI 0.009
Grade SI units percent
Cut-off grade SI 0.174999997
Cut-off grade SI units percent
Contained commodity SI 40,968
Contained commodity SI units metric tons
Short reference Capstone Mining Corp (2017)Table 2
Reference Capstone Mining Corp., 2017, Annual Information Form For the year ended December 31, 2016, 87 p.

History of the site

Dates Status Detail Reference
2006 to 2015 Exploration Drilling Bush and others (2016)

Geographic context based on the point coordinates