Commodities
PrimaryIron, Copper
Commodity typeM
Deposit
Model62: Skarn Fe
Deposit sizeY
Orebody formTWO LENTICULAR LAYERS
Ore controlContact Metamorphic In Tuffaceous Marble
Materials
Ore mineralsChalcopyrite, Cuprite, Goethite, Hematite, Magnetite, Malachite
GangueCalcite, Epidote, Garnet, Quartz
Geology
Host rockMarble
Associated rockDiorite
Economic & production
Development statusProducer
First production1951
Last production1953
Identification
Deposit ID10107483
MRDS IDW701123
Alternate namesLa Mina, La Esperanza, Juncos Mine
RegionCR
Data scoreB
Coordinates18.23399, -65.89778
References
COX, DENNIS P., AND BRIGGS, REGINALD P., 1973, METALLOGENIC MAP OF PUERTO RICO: U.S. GEOLOGICAL SURVEY, MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-721, ACCOMPANIED BY EXPLANATORY PAMPHLET, 6 P.VAZQUEZ, LEOVIGILDO, AND OWENS,JAMES P., 1958, GEOLOGY AND ORE DEPOSITS OF THE KEYSTONE IRON MINE NEAR JUNCOS, PUERTO RICO; ECONOMIC DEVELOPMENT ADMINISTRATION, DEPT. OF INDUSTRIAL RESEARCH, BULL.6,VAZQUEZ, LEOVIGILDO, 1960, GEOLOGY AND ORE DEPOSITS OF THE KEYSTONE IRON MINE NEAR JUNCOS, PUERTO RICO, ECONOMIC DEVELOPMENT ADMINISTRATION, DEPT. OF INDUSTRIAL RESEARCH, BULL. NO. 7BROEDEL, C. H., 1961, PRELIMINARY GEOLOGIC MAP SHOWING IRON AND COPPER PROSPECTS IN THE JUNCOS QUADRANGLE, PUERTO RICO: U. S. GEOLOGICAL SURVEY MISC. GEOL. INV. MAP I-326.VAZQUEZ,L.,1960, GEOLOGY AND ORE DEPOSITS OF THE KEYSTONE IRON MINE, DEPT. OF INDUSTRIAL RESEARCH, BULL.7