Commodities
PrimaryManganese
Commodity typeM
Deposit
Model97: Volcanogenic Mn
Deposit sizeS
Orebody formREPLACEMENT BODIES, LENSES, RESIDUAL ORE
Materials
Ore mineralsBraunite, Pyrolusite
GangueQuartz
Geology
Host rockDiorite
StructureSteeply Dipping To Nearly Vertical Faults Between Cherty Shale And Diorite; Shear Zones
Tectonic settingNicoya Ophiolite Complex
AlterationSilicification, Supergene Enrichment
Economic & production
Development statusPast Producer
Last production1920
Identification
Deposit ID10007843
MRDS IDCS00069
RegionNA
Data scoreB
Coordinates10.30107, -85.76803
References
SEARS, J. D., 1919, DEPOSITS OF MANGANESE ORE IN COSTA RICA: U.S. GEOL. SURV. BULL. 710-C, P. 70-71.WEBBER, B. N., 1942, MANGANESE DEPOSITS OF COSTA RICA, CENTRAL AMERICA: AM. INST. MIN. METALL. PETROL. ENG. TECH. PUB. 1445, P. 6.ROBERTS, R. J., 1944, MANGANESE DEPOSITS IN COSTA RICA: U.S. GEOL. SURV. BULL. 935-H, P. 398-399.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.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.ROBERTS (1944)