Mine detail: Toncrae Mine

Previously called 'Toncray MineToncrae-Howard Mine'

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Location: Floyd County, Virginia, United States, North America
Lat / long: 36.83007, -80.37562
dep_id: 10068221
mrds_id: W001171
Commodity type: metallic
Major mineral: Copper, Iron, Iron, Pig Iron
Minor mineral: Sulfur-Pyrite, Silver
Trace mineral: Cobalt, Nickel
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Chalcocite, Chalcopyrite, Covellite, Limonite, Pyrite, Pyrrhotite
gangue: Biotite, Feldspar, Garnet, Quartz
orebody_fm: FOLDED LENS
work_type: Surface/Underground
model: 91: Massive sulfide, Besshi (Japanese deposits)
Reporter: Coury, Anny B., Meintzer, Robert E. (Le Van, D.C.)
hrock_unit: Lynchburg Formation
hrock_type: Gneiss
Structure: Blue Ridge Anticlinorium, Foliation Strikes N 15-25 Deg E And Dips 35-50 Deg Se.
tectonic: Orogen
Year first produced: 1800
disc_yr: 1800
References:
  • Deposit:: DIETRICH, R V, 1959, GEOLOGY AND MINERAL RESOURCES OF FLOYD COUNTY OF THE BLUE RIDGE UPLAND, SOUTHWESTERN VIRGINIA: VIRGINIA POLYTECHNIC INSTITUTE BULLETIN, ENGINEERING EXPERIMENT STATION SERIES NO 134, 160 P.
  • Deposit:: ESPENSHADE, G H, 1963, GEOLOGY OF SOME COPPER DEPOSITS IN NORTH CAROLINA, VIRGINIA, AND ALABAMA: U S GEOLOGICAL SURVEY BULLETIN 1142-I, 50 P.
  • Deposit:: SWEET, P C AND BELL, S C, 1980, METALLIC MINERALIZATION IN THE BLUE RIDGE PROVINCE OF VIRGINIA: VIRGINIA DIVISION OF MINERAL RESOURCES, IN PREPARATION.
  • Deposit:: GROSH, W.A., 1948, INVESTIGATION OF THE TONCRAE-HOWARD COPPER DEPOSITS, FLOYD COUNTY, VA: U.S. BUREAU OF MINES REPORT OF INVESTIGATION 4362, 4 P.
  • Deposit:: 1800? DIREXPL MINING OF GOSSAN FOR IRON UNTIL ABOUT 1850, FOLLOWED BY MINING OF SMUT ORE FOR CU, 1854-1855.
  • Deposit:: 1905 DIREXPL NEW YORK AND VIRGINIA COPPER CO.: DEVELOPMENT OF PRIMARY SULFIDES UNTIL 1908.
  • Deposit:: 1938 DIREXPL AMERICAN METALS CO: DRILLING AND SELECTIVE MINING UNTIL 1941.
  • Production:: ESPENSHADE (1963), SWEET AND BELL (1979)
  • Reserve-Resource:: UNPUBLISHED REPORT BY R.J. WRIGHT, 1943, USGS
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