Geologic Map of the Swansea-Copper Penny Area, Central Buckskin Mountains, West-Central Arizona

Spencer, J.E.; Reynolds, S.J.

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dc.contributor.author	Spencer, J.E.
dc.contributor.author	Reynolds, S.J.
dc.date.accessioned	2018-11-13T23:29:32Z
dc.date.available	2018-11-13T23:29:32Z
dc.date.issued	1987-02-01
dc.identifier.citation	Spencer, J.E., Reynolds, S.J., 1987, Geologic Map of the Swansea-Copper Penny Area, Central Buckskin Mountains, West-Central Arizona. Arizona Geological Survey Open File Report, OFR-87-02, 1 map sheet, map scale 1:12,000, 12 p.
dc.identifier.uri	http://hdl.handle.net/10150/630961
dc.description	The Buckskin-Rawhide detachment fault separates a variety of Proterozoic through Cenozoic rock types from underlying mylonitic crystalline rocks. In the Swansea-Copper Penny area of the central Buckskin Mountains, the detachment fault defines a gently ENE-plunging synform. Upper-plate rocks are preserved in the synform, whereas lower-plate myloni tic crystalline rocks compose the flanking, topographically higher, ENE-trending antifonns. Mylonitization of lower-plate crystalline rocks was the result of ductile shearing along the down-dip projection of the Buckskin-Rawhide detachment fault early in its movement history. TWo assemblages of rocks are preserved in the upper plate of the Buckskin-Rawhide detachment fault in the Swansea-Cbpper Penny area: (l) Pre-Tertiary rocks, especially Paleozoic and Mesozoic metasedimentary rocks, are complexly deformed and have undergone greenschist-facies metamorphism. Metamorphism, folding, cleavage development, and tectonic interleaving of diverse rock types is interpreted to be the result of Merozoic thrust faulting. (2) A litholcgically diverse stratigraphic sequence of Miocene and upper Oligocene(?) volcanic and sedimentary rocks generally dips moderately to steeply to the southwest and is folded into two north-south trending, south-plunging anticlines.
dc.language.iso	en
dc.publisher	Arizona Geological Survey (Tucson, AZ)
dc.relation.ispartofseries	OFR-87-02
dc.relation.url	https://library.azgs.arizona.edu/item/AOFR-1552431203916-662
dc.rights	Arizona Geological Survey. All rights reserved.
dc.subject	Arizona Geological Survey Open File Reports
dc.subject	west-central Arizona
dc.subject	Central Buckskin Mountains
dc.subject	Swansea-Copper Penny Area
dc.subject	map
dc.subject	Geology
dc.subject	Mississippian
dc.subject	Pennsylvanian
dc.subject	Permian
dc.subject	Paleozoic
dc.subject	Tertiary
dc.subject	Quaternary
dc.subject	basin-fill
dc.subject	bedrock geology
dc.subject	Beaverdam Thrust Fault
dc.subject	thrust fault
dc.subject	alluvial deposits
dc.subject	Copper Penny Mine
dc.subject	volcanics
dc.subject	greenschist-facies
dc.subject	metasedimentary rocks
dc.subject	antiform
dc.subject	synform
dc.subject	mylonites
dc.subject	detachment fault
dc.title	Geologic Map of the Swansea-Copper Penny Area, Central Buckskin Mountains, West-Central Arizona
csdgm.bounding.west	-114.193
csdgm.bounding.east	-114.088
csdgm.bounding.north	34.2653
csdgm.bounding.south	34.1807
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	2018-11-13T23:29:32Z