Mine detail: Tanama Deposit

Previously called ''

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Location

Lat / long:

18.25899, -66.79086

Resource(M)

Primary:	Copper, Gold
Ore:	Chalcopyrite, Magnetite, Pyrite
Discovery year:	1958

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host type:	Tonalite
Associated type:	Tonalite
Structure:	The Mineralized Pluton Is In An Elongate Cluster Of Stocks Aligned Perpendicular To The Regional Grain Of The Island.
Tectonic:	Gold-Rich Porphyry System In Low-Potassium Island-Arc Environment
Alteration processes:	Three Alteration Zones Are Present:(1)An Inner, Amphibole-Dominated Assemblage Containing Abundant Magnetite And Of Low Copper Grade;(2)An Outer, Chlorite-Dominated Assemblage, Locally Containing Traces Of Hydrothermal Biotite And Potassium Feldspar And Abundant Chalcopyrite Replacing Magnetite; And (3)An Upper, Sericite-Clay-Calcite-Pyrite Zone

References

MRDS	W701014
DEP	10085423
Reference	{Deposit:: 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.}{Deposit:: NELSON, A. E., AND TOBISCH, O. T., 1968, GEOLOGIC MAP OF THE BAYANEY QUADRANGLE, PUERTO RICO: U. S. GEOLOGICAL SURVEY MISC. GEOL. INV. MAP I-525.}{Deposit:: COX, DENNIS P., 1985, GEOLOGY OF THE TANAMA AND HELECHO PORPHYRY COPPER DEPOSITS AND VICINITY, PUERTO RICO: U.S. GEOLOGICAL SURVEY PROF. PAPER 1327, 59 P.}
Reporter	Paidakovich, Matthew E.