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

Richard, S.M.; Spencer, J.E.

dc.contributor.author	Richard, S.M.
dc.contributor.author	Spencer, J.E.
dc.date.accessioned	2018-11-10T02:50:28Z
dc.date.available	2018-11-10T02:50:28Z
dc.date.issued	1994
dc.identifier.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.
dc.identifier.uri	http://hdl.handle.net/10150/630790
dc.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produced contained about 11 % lead, 3.5% copper, 7 oz/ton of silver, and .2 oz/ton of gold [Arizona Geologic Survey, unpublished data]. 2.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])
dc.language.iso	en
dc.publisher	Arizona Geological Survey (Tucson, AZ)
dc.relation.ispartofseries	OFR-94-14
dc.relation.url	https://library.azgs.arizona.edu/item/AOFR-1552429381723-867
dc.rights	Arizona Geological Survey. All rights reserved.
dc.subject	Arizona Geological Survey Open File Reports
dc.subject	La Paz County
dc.subject	Plomosa Mountains
dc.subject	Ramsay Mine Area
dc.subject	Arizona
dc.subject	topography
dc.subject	geomorphology
dc.subject	Mine
dc.subject	map
dc.subject	Geology
dc.subject	Black Mesa
dc.subject	Supai Formation
dc.subject	Redwall Formation
dc.subject	copper
dc.subject	galena
dc.subject	anglesite
dc.subject	mineralization
dc.title	Detailed geologic map and cross sections of the Ramsay Mine Area, southeastern Plomosa Mountains, West-central Arizona
csdgm.bounding.west	-114.156
csdgm.bounding.east	-113.805
csdgm.bounding.north	33.7264
csdgm.bounding.south	33.4335
dc.description.collectioninformation	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.
refterms.dateFOA	2018-11-10T02:50:28Z