Detailed geologic map and cross sections of the Ramsay Mine Area, southeastern Plomosa Mountains, West-central Arizona

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Author
Richard, S.M.
Spencer, J.E.
Issue Date
1994
Keywords
Arizona Geological Survey Open File Reports
La Paz County
Plomosa Mountains
Ramsay Mine Area
Arizona
topography
geomorphology
Mine
map
Geology

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Citation
Richard, S.M., Spencer, J.E., 1994, Detailed geologic map and cross sections of the Ramsay Mine Area, southeastern Plomosa Mountains, West-central Arizona. Arizona Geological Survey Open File Report, OFR-94-14, 2 map sheet, map scale 1:12,000, 17 p.
Publisher
Arizona Geological Survey (Tucson, AZ)
Description
Detailed Geologic map and cross sections of the Ramsay Mine Area, southeastern Plomosa Mountains, West-central Arizona. Report and two map sheets, scale 1:12,000, with cross-sections. Locations of altered or mineralized rocks, mines and prospects are indicated on the geologic map, two examples below. 1. Black Mesa mine of Keith [1978] (same location as site # 11 of Richard [1992]). Tunnels and shaft in brecciated fault zone between Redwall and Martin formations. Waste heap contains massive 12 and comb-structured silica-FeOx vein material, as well as spongy quartz-limonite (after pyrite) stockwork. Sparse malachite and chrysocolla fill open space in refractured silica-FeOx veins. Brecciated quartz vein material with silica-FeOx cement also present. In shaft on SE side of canyon mineralized breccia zones in carbonate are irregular and lenticular, with both steep and gentle dip. Adjacent carbonate rocks show little evidence of alteration. Keith [1978] describes "spotty cerrusite, anglesite, galena, chrysocolla, malachite, and brochantite,with siderite, quartz, ankerite, calcite and limonite in lensing replacement deposits in steeply dipping Paleozoic limestone beds. Cellular boxwork and vugs. Some native copper and cerargyrite". Available production data through 1981 indicate that the ore produced contained about 11 % lead, 3.5% copper, 7 oz/ton of silver, and .2 oz/ton of gold [Arizona Geologic Survey, unpublished data]. 2. Shaft in fault, oriented 134/64 NE, between Redwall and Supai Formations. Massive, dense silica-hematite in irregular clots along fault zone. Also earthy hematite along fractures. A few lenses of sericitized Bolsa quartzite are present in the fault zone, otherwise alteration outside of fault zone is minimal. (Same location as site #16 of Richard [1992])
URI
http://hdl.handle.net/10150/630790
Additional Links
https://library.azgs.arizona.edu/item/AOFR-1552429381723-867
Language
en
Series/Report no.
OFR-94-14
Rights
Arizona Geological Survey. All rights reserved.
Collection Information
Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
North Bounding Coordinate
33.7264
South Bounding Coordinate
33.4335
West Bounding Coordinate
-114.156
East Bounding Coordinate
-113.805
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