Description
R.R. Richardson
Commodities
PrimaryGold
SecondaryLead, Copper, Silver
TertiaryMolybdenum, Zinc
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Ore controlE-W Trending Irregular Lensing Quartz-Calcite Fissure Veins Cutting Rhyolitic Tuff And Andesitic Flows; 2 Main Veins And Several Minerali Zed Cross Veins
Materials
Ore mineralsGold, Silver, Wulfenite
GangueBiotite, Calcite, Fluorite, Hornblende, Kaolin, Magnetite, Quartz
Geology
Host rockAndesite
Associated rockDacite · Middle Member Of Bathtub Formation (Andesite Flows);Gringo Gulch Volcanics , Dacite Porphyry
StructureE-W Trending Quartz Fissure Veins; Andesite Is Cut By Steeply S-Dip Ping Sheeting Structures, Dipping About Parallel With Lode, Gold Is Uniformly Distributed In Vein But Generally Favors Footwal L And Is Only Rarely Found In Hanging Wall
Tectonic settingMt Wrightson Fault Block
AlterationDeeply Oxidized; Epidotized; Propylitic Alteration
Economic & production
Development statusPast Producer
First production1907
Last production1937
Discovery year1893
Identification
Deposit ID10037110
MRDS IDM030418
Alternate namesFrancis Group, Temporal Group
RegionNA
Data scoreB
Coordinates31.5718, -110.7704
References
KEITH, 1975, ABM BULL 191SCHRADER, 1915, USGS BULL 582DREWES, 1971, USGS MAP I-614ABGMT FILE DATA, STANTON B. KEITHUSBM FILES, GRINGO MINE GROUPABGMT-USBM FILE DATAABGMT CLIPPINGS FILES, GRINGO GROUPADMR FILE DATA, GRINGO MINEKEITH, 1975, P. 89