Mine detail: Pioneer Group

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

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Location: Nicaragua, North America
Lat / long: 14.01756, -84.63327
dep_id: 10105202
mrds_id: TC34626
Commodity type: metallic
Major mineral: Gold
Minor mineral: Lead, Zinc, Copper
Operation type: Unknown
Production size: Production occurred
Development status: Past Producer
ore: Bornite, Chalcopyrite, Galena, Gold, Sphalerite
gangue: Chlorite, Hematite, Pyrite, Quartz
alteration: Slight Wallrock Replacement; Alteration Abundant
conc_proc: More Base Metals In Sw End Of District, More Gold To The Ne. See Individual Descriptions.
ore_ctrl: Faults; Ore Shoots Often In Vein Junctions And Branch Points; Second Enrichment In Oxide Zone (50-100 M)
Reporter: Carbonaro, Marguerite M. (Venable, M.)
hrock_unit: Matagalpa Volcanics;Basement Yojoa Limestones, Shales, Greywackes;Basement Shcists And Marbles
hrock_type: Volcanic Rock (Aphanitic)
arock_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
References:
  • 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
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