The Heddleston Copper Project is a copper mine located in Lewis and Clark county, Montana at an elevation of 5,518 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Elevation: 5,518 Feet (1,682 Meters)
Primary Mineral: Copper
Lat, Long: 47.0233, -112.36270
Map: View on Google Maps
Heddleston Copper Project MRDS details
Primary: Heddleston Copper Project
Secondary: Heddleston Group
Secondary: Carbonate Mine - 0300490040
Secondary: Midnight Mine - 0300490284
Secondary: Paymaster Mine - 0300490242
Secondary: Anaconda Mine - 0300490146
Secondary: Mike Horse Mine - 0300490362
Secondary: Heddleston Deposit
County: Lewis and Clark
District: Silver District
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land or if it is in an area that is generally private property. It does not indicate a claim status and does not necessarily indicate an area is open to prospecting.
Type: Private Lease
Type: Located Claim
Owner Name: Asarco (American Smelting And Refining Co.)
Company ID: 2401105
Home Office: Washington
Info Year: 1984
Record Type: Deposit
Operation Category: Past Producer
Deposit Type: Porphyry Cu-Mo
Operation Type: Surface
Mining Method: Open Stope - Gophering (Coyoting)
Milling Method: Flotation
Year First Production: 1915
Discovery Year: 1898
Years of Production:
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Model Name: Porphyry Cu-Mo
Model Name: Porphyry Mo, low-F
Form: lenses and shoots
Structure: TWO NW-TRENDING FAULTS:MIKE HORSE FAULT&BLACKFOOT FAULT
Structure: LEWIS THRUST FAULT
Structure: LEWIS AND CLARK LINEAMENT
Alteration Type: L
Alteration Type: L
Age Type: Associated Rock
Age Young: Eocene
Comment (General): This deposit was centered around the Mike Horse Mine. Exploration was for large tonnage porphyry copper deposit, while original mining was of lead, gold,copper, and silver. Some information from the Mike Horse property has been consolidated into this record.
Comment (Production): TOTAL EST. PROD. OF DISTRICT $120,000, HALF WAS PB REST AU, AG, CU
Comment (Reserve-Resource): Current drill-indicated resource estimate of 125 million tons of ore at .49% Cu, .015% Mo and .15 opt Ag. (Potential to add at least another 50 million tons of ore to resource at peripheral areas is reported in sale papers.)
Comment (Workings): Anaconda completed extensive RC, core and churn drilling of the project in the 1960?s and Asarco continued a drilling program into the 1990?s. (358 holes with over 250,000 feet of churn, RC and diamond drilling)
Comment (Production): PRODUCTION AND DEVELOPMENT reported from 1940 TO 1952 at Mike Horse mine.
Comment (Economic Factors): APPROXIMATELY $25,000,000 PRODUCED FROM 1889 TO 1958 OF LEAD, ZINC, COPPER, SILVER, AND GOLD (MILLER AND OTHERS, 1973). ?THE U.S BUREAU OF MINES HAS CREDITED THIS DISTRICT WITH A PRODUCTION OF ABOUT $11.6 MILLION, WITH THE BULK OF THE VALUE COMING FROM THE MIKE HORSE MINE.? (MCCLERNAN, 1983) RESERVES (EYDE, 1972): DEVELOPED- 20 MILLION TONS @0.53 CU, 0.01 TO 0.015% MO AND 0.15 OPT AG PROBABLE- 40 MILLION TONS @0.51 CU, ? MO, 0.15 OPT AG MARGINAL ORE 30 MILLION TONS @0.32% CU, ? MO, AND 0.15 OPT AG POSSIBLE ORE 30 MILLION TONS@0.55% CU, ? MO, AND 0.15 OPT AG
Comment (Names): MIKE HORSE, ANACONDA, MIDNIGHT, CARBONATE AND PAYMASTER ARE NAMES OF PATENTED CLAIMS, VEINS AND MINES.
Comment (Workings): WORKINGS IN 1933 INCLUDED 3 ADITS, TUNNELS 1, 2, AND 3, SPACED THROUGH A VERTICAL RANGE OF ABOUT 300 FT.
Comment (General): The Heddleston Copper Project consists of approximately 41 patented lode mining claims and 189 unpatented claims.
Comment (General): This is the full text of the PDF reference. An aerial photos is missing from this description. Heddleston Copper Project, Lewis and Clark County, Montana ASARCO, Incorporated is offering for sale its Heddleston Copper Project in Lewis and Clark County, Montana. The Heddleston Project is located in west central Montana, about 50 miles NW of Helena, and consists of a major Cu-Mo porphyry deposit. The mineralization is a chalcopyrite-molybdenite Eocene instrusive complex which cuts Proterozoic belt sediments. The primary mineralization has been weathered and enriched, and at the surface consists of a chalcocite blanket overlying chalcopyrite. The project consists of approximately 41 patented lode mining claims and 189 unpatented claims. Anaconda completed extensive RC, core and churn drilling of the project in the 1960?s and Asarco continued a drilling program into the 1990?s. INVESTMENT HIGHLIGHTS: ? Total drilling database of 358 holes with over 250,000 feet of churn, RC and diamond drilling ? Current drill-indicated resource estimate of 125 million tons of ore at .49% Cu, .015% Mo and .15 opt Ag ? Potential to add at least another 50 million tons of ore to resource at peripheral areas ? Open pit minable resource combined with SXEW processing facilities ? Metallurgical testwork demonstrates 60% leach recoveries from chalcocite ores Exclusively represented by: Andrew A. Brodkey Managing Director T 520.323.5120 Andrew.Brodkey@cbre.com www.cbre.com/imm John T. Perry Vice President & Director T 520.323.5158 John.Perry@cbre.com www.cbre.com/imm
Comment (Reserve-Resource): COPPER PRIORITY. ONE DRILL HOLE - NO OTHER DATA.
Comment (Deposit): REC-040 27 MILES OF EXPLORATION/DEVELOPMENT ROADS CONSTRUCTE THAN 1 MILE OF GRAVELLED ROAD ACCESSES THE PROPERTY. MAKE UP WATER CAN BE SUPPLIED FROM WELLS LESS THAN 2 MILES DISTANT. A TRANSMISSION LINE LEADS TO THE PROPERTY FROM HWY 2 MILES DISTANT. REC-080 ATTITUDE AND DIMENSIONS PERTAIN TO THE MINERALIZED Z CONTAINED SECONDARY ENRICHED MINERAL DEPOSITS COMPRI HEDDLESTON COPPER-MOLYBDENUM PROPERTY. RECS-101-105 RESERVES/RESOURCES OF COMBINED DEPOSITS-ANACOND ESTIMATE. MILL RCVY ASSUMD. -84% CU, 53% MO. MILL CONC. ASSUMD.-25% CU, 57% MO. REC 160-161 CONC. DESTINATION-ANACONDA (217 KM). ASARCO ACQUIRED THE PROPERTY IN 1982. SINCE THAT TIME, ASSESSMENT WORK. THE COMPANY HAS NO PLANS TO PUT THE PROERTY INTO PRODUCTION IN THE NEAR FUTURE. IN SECTION 21 AND ALSO SECTION 29.
Reference (Deposit): ROBERTSON, F., 1956, GEOCHEMICAL PROSPECTING BY SOIL ANALYSES IN MT, MT BUREAU OF MINES & GEOLOGY BULL. 7.
Reference (Deposit): PARDEE, J.T. AND SCHRADER, F.C., 1933, METALLIFEROUS DEPOSITS OF THE GREATER HELENA MINING REGION: USGS BULL. 842, 318 p.
Reference (Deposit): MELSON, W.G., 1964, GEOLOGY OF THE LINCOLN AREA, MONTANA AND CONTACT METAMORPHISM OF IMPURE CARBONATE ROCKS: PH. D. DISSERTATION, PRINCETON UNIVERSITY, 153 P.
Reference (Deposit): RICHMOND, R.C., 1975, GEOLOGICAL EXPLORATION IN THE HEDDLESTON DISTRICT, MONTANA. PROCEDDINGS OF THE 1973 PACIFIC NWMINING AND METALS CONFERENCE, APRIL 1973. MONT. BUREAU OF MINES AND GEOL. BULLETIN 95, P. 14.
Reference (Deposit): LAWSON, D.C., 1975, DIRECTORY OF MINING ENTERPRISES FOR 1974: MBMG BULLETIN 95, P. 14.
Reference (Deposit): MILLER, R.N. SHEA, E.P., GODDARD, C.C. JR., POTTER, C.W., AND BROX, G.B., APRIL 1973, GEOLOGY OF THE HEDDLESTON COPPER-MOLYBDENITE DEPOSIT, LEWIS AND CLARK COUNTY, MT.: PROCEEDINGS OF THE 1973 PACIFIC NW MINING AND METALS CONFERENCE; American Institute of Mining, Metallurgical and Petroleum Engineers, Coeur d'Alene, Idaho.
Reference (Deposit): MCCLERNAN, H.G., 1983, METALLIC MINERAL DEPOSITS OF LEWIS AND CLARK COUNTY, MONTANA: MBMG MEMOIR 52, 73 P.
Reference (General): http://www.cbre.com/NR/rdonlyres/B8A28904-58AE-4CD5-B26A-BBD8289AF853/479303/HeddlestonTeaser.pdf (Information provided to prospective buyers of the property).