Mine detail: Pioneer Group

Previously called 'Vein Names: Highland Mary, Lone Star, Colorado, Guillermina, PioneerPioneer-Lone Star'

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Location

Lat / long:

14.01756, -84.63327

Resource(M)

Primary:	Gold
Secondary:	Lead, Zinc, Copper
Ore:	Bornite, Chalcopyrite, Galena, Gold, Sphalerite
Gangue:	Chlorite, Hematite, Pyrite, Quartz

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Past Producer

Geology

Host rock:	Matagalpa Volcanics;Basement Yojoa Limestones, Shales, Greywackes;Basement Shcists And Marbles
Host type:	Volcanic Rock (Aphanitic)
Associated type:	Diorite
Structure:	Three Upthrown Blocks With Veins Separated By Two Downthrown Blocks; E-W Dip-Slip Faults With Small To Moderate Horizontal Displacement; Paleocaldera Structures?
Tectonic:	Chortis Block, Central Nicaraguan Uplift
Alteration processes:	Slight Wallrock Replacement; Alteration Abundant

References

MRDS	TC34626
DEP	10105202
Reference	{Deposit:: ROBERTS, R.J., IRVING, E.M., 1957, MINERAL DEPOSITS OF CENTRAL AMERICA: U.S. GEOLOGICAL SURVEY BULLETIN 1034, P. 187-188}{Other Database:: CIMRI}
Reporter	Carbonaro, Marguerite M. (Venable, M.)