Mine detail: Playa Real Mines

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Location:	Guanacaste, Costa Rica, North America
Lat / long:	10.38301, -85.84164
dep_id:	10007817
mrds_id:	CS00035
Commodity type:	metallic
Major mineral:	Manganese
Operation type:	Unknown
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Bixbyite, Braunite, Hollandite, Pyrolusite, Wad
orebody_fm:	THIN ELONGATE TO LENTICULAR, SUBHORIZONTAL BODIES, IRREGULAR POCKETS, RESIDUAL CAPPING
model:	97: Volcanogenic Mn
alteration:	Silicification
Reporter:	Howe, Stephen S., Mosier, Dan
hrock_type:	Shale
Structure:	Several Faults Cut Orebodies While Others Are Subparallel To Ore Lenses
tectonic:	Nicoya Ophiolite Complex
yr_lst_prd:	1918
References:	Deposit:: SEARS, J. D., 1919, DEPOSITS OF MANGANESE ORE IN COSTA RICA: U.S. GEOL. SURV. BULL. 710-C, P. 68-70. Deposit:: ROBERTS, R. J., 1944, MANGANESE DEPOSITS IN COSTA RICA: U.S. GEOL. SURV. BULL. 935-H, P. 392. Deposit:: KUYPERS, E. P., AND DENYER CH., PERCY, 1979, VOLCANIC EXHALATIVE MANGANESE DEPOSITS OF THE NICOYA OPHIOLITE COMPLEX, COSTA RICA: ECON. GEOL., V. 74, P. 672-678. Deposit:: HEIN, J. R., KUIJPERS, E. P., DENYER, PERCY, AND SLINEY, R. E., 1983, PETROLOGY AND GEOCHEMISTRY OF CRETACEOUS AND PALEOGENE CHERTS FROM WESTERN COSTA RICA, IN IIJIMA, A., HEIN, J. R., AND SIEVER, R., EDS., SILICEOUS DEPOSITS IN THE PACIFIC REGION: AMSTERDAM, ELSEVIER SCIENTIFIC PUB. CO., P. 149, 150. Deposit:: U.S. GEOLOGICAL SURVEY, DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS, UNIVERSIDAD DE COSTA RICA, 1987, MINERAL RESOURCE ASSESSMENT OF THE REPUBLIC OF COSTA RICA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES MAP I-1865, 75 P. Production:: SEARS (1919), ROBERTS (1944)