Mine detail: Golconda

Previously called ''

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Location

Lat / long:

-18.42114, -41.71253

Resource(B)

Primary:	Niobium (Columbium), Tantalum, Gemstone, Mica
Ore:	Aquamarine, Muscovite, Tantalite
Gangue:	Amblygonite, Biotite, Cassiterite, Cleavelandite, Feldspar, Lepidolite, Phenacite, Quartz, Tourmaline
Orebody form:	SILL-LIKE WITH CURVED, IRREGULAR CONTACTS

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Producer
First production started:	1908

Geology

Host type:	Pegmatite
Associated type:	Amphibole Schist
Structure:	Asymmetric And Overturned To West Isoclinal Antiform With N25w, 60ne Axial Plane And N10 Plinge Of The Axis.

References

MRDS	TC42488
DEP	10066333
Reference	{Deposit:: PECORA, W.T., KLEPPER, M.R., LARRABEE, D.M., BARBOSA, A.L.M., AND FRAYHA, RESK, 1950, MICA DEPOSITS IN MINAS GERAIS, BRAZIL: U.S. GEOLOGICAL SURVEY BULLETIN 964-C, P. 205-305.}{Deposit:: PECORA, W.T., AND BARBOSA, A.L.M., 1944, THE GOLCONDA PEGMATITE MINE, MUNICIPIO OF GOVERNADOR VALADARES, MINAS GERAIS, BRAZIL: U.S. GEOLOGICAL SURVEY UNPUBLISHED REPORT 14P.}{Other Database:: CIMRI}{Production:: PECORA AND BARBOSA (1944); PECORA AND BARBOSA (1944), PECORA ET AL (1950).}
Reporter	Page, Norman J.