Mine detail: Quilca District

Previously called ''

<< Back to the map

Location

Lat / long:

-16.6394, -72.34132

Resource(N)

Primary:

Mica

Production

Operation type:	Unknown
Deposit type:	PEGMATITES
Production size:	Yes
Development status:	Past Producer
First production started:	1905

Geology

Structure:

ENTIRE REGION UNDERLAIN BY REDDISH OR PINK PREDOMINANTLY MASSIVE SYENITIC GNEISS OF POSSIBLE PRECAMBRIAN AGE. IT CONSISTS MAINLY OF PINK POTASH FELDSPAR, WITH MINOR HORNBLENDE, BIOTITE, AND A LITTLE QUARTZ THAT IS THOUGHT TO BE SECONDARY. INCLUDED IN THE GNEISS ARE NUMEROUS STREAKS OR LENSES OF DARKER MATERIAL, POSSIBLE METAMORPHOSED DIKES, AS WELL AS OF HIGHLY FELSIC ROCK MADE UP ALMOST ENTIRELY OF FELDSPAR WITH A LITTLE QUARTZ. CUTTING THE GNEISS ARE DIABASE DIKES OF AT LEAST TWO AGES. PEGMATITES ARE FOUND THROUGHOUT THE REGION BUT SEEM TO BE MORE ABUNDANT IN AREAS WHERE OLDER DIABASE DIKES ALSO ARE ABUNDANT.

Alteration processes:

WALL ROCK ALTERATION IS STRONG NEAR THE PEGMATITES BUT DIMINISHES RAPIDLY IN INTENSITY AWAY FROM THEM. ALTERATION IS STRONGEST AT THE FOOTWALL. THE GNEISS APPEARS TO HAVE BEEN RATHER SUSCEPTIBLE TO ALTERATION, WHERE AS THE DIABASE DIKES WERE RESISTANT. ALTERATION PRODUCTS INCLUDE BIOTITE, MUSCOVITE, QUARTZ, AND CALCITE.

References

MRDS	W002270
DEP	60001614
Reference	{Deposit:: SIMONS, FRANK, 1960, UNPUBLISHED REPORT, P. 1701}{Deposit:: PERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969}{Deposit:: CAMMINATI, LUIS, 1944, INFORME SOBRE EL RECONOCIMIENTO PRACTICADO A LA ZONA MICACEA DE LOS DEPARTAMENTOS DEL SUR DEL PERU: CUERPO DE ING. DE MINAS DEL PERU BOL., NO. 130, P. 97-118}