Description
By Spanish And Indians
Commodities
PrimaryCopper, Molybdenum
SecondaryGold, Silver
Commodity typeM
Deposit
Model53: Porphyry Cu
Deposit sizeL
WorkingsUnderground
Orebody formCHIMNEY
Ore controlN55 E Striking Faults And Veins Centered On And Dipping Away From Braden Pipe
Materials
Ore mineralsBornite, Brochantite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Cuprite, Enargite, Ferrimolybdite, Galena, Huebnerite, Malachite, Molybdenite, Olivenite, Pyrite, Sphalerite, Stibnite, Tennantite, Tenorite
GangueAnhydrite, Ankerite, Barite, Biotite, Calcite, Chlorite, Gypsum, Hematite, Limonite, Magnetite, Quartz, Rhodochrosite, Sericite, Tourmaline
Geology
Host rockAndesite · Lower Farellones Formation
Associated rockDiorite,Dacite,Lamprophyre · Lampophyre Dike;;Branden Formation;;Upper Farellones Formation;Middle Farellones Formation;Lower Farellones Formation;Coya-Machali Formation (Chilense Formation)
StructureNorth Trending Folds, Faults, And Plutonic Masses, Braden Pipe (Old Explosive Volcanic Vent) Is A Circular Inverted Conical Shaped Hole 5200 Ft Deep In The Volcanics, Filled With Breccia, Surrounded By The Orebody
Tectonic settingAndean Cordillera And Batholith
AlterationPotassic, Secondary Biotite-Kspar-Anhydrite-Quartz-Sericite; Quartz-Sericite Alteration; Propylitic Alteration; Supergene Argillic Alteration.
Economic & production
Development statusProducer
First production1906
Discovery year1706
Identification
Deposit ID10068475
MRDS IDW001540
Alternate namesBraden
RegionSA
Data scoreA
Coordinates-34.08914, -70.33783
References
RUIZ, F., CARLOS, 1965, GEOLOGIA Y YACIMENTOS METALIFERO DE CHILE: INST. INV. GEOL. CHILE, P. 177-181. (SPANISH)BEALL, J. F., 1969, COPPER IN THE ANDES: MIN. ENG., V. 21, NO. 11, P. 62-66HOWELL, F. H. AND MALLOY, J. S.,960, GEOLOGY OF THE BRADEN OREBODY, CHILE, SOUTH AMERICA: ECONOMIC GEOLOGY, V. 55, NO. 5, P. 863-905MINING JOURNAL ANNUAL REVIEW, JUNE, 1970, P. 299.MINING JOURNAL ANNUAL REVIEW, JUNE, 1969, P. 257-258.MINING JOURNAL ANNUAL REVIEW, JUNE, 1972, P. 306-307.AMERICAN METAL MARKET, V. 65, NO. 150, P. 18.METALS WEEK - METALS SOURCEBOOK, 6/16/75, #C3005.CAMUS, F., 1975, GEOLOGY OF THE EL TENIENTE OREBODY WITH EMPHASIS ON WALL ROCK ALTERATION: ECONOMIC GEOLOGY, V. 70, NO. 8, P. 1341-1372.1906 DIREXPL BRADEN COPPER CPRODUCTION INFORMATION IS FROM MINING JOURNAL ANNUAL REVIEW, 1969, 1970, AND 1972, BEALL, 1969, HOWELL, 1960 AND AMERICAN METAL MARKET, 1977. CAMUS (1975). HOWELL AND MOLLOY (1960)EST. BY G GOUDARZI 3/73