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Sixteen 40Ar/39Ar geochronology analyses from southeastern Arizona

dc.contributor.authorPeters, L.
dc.contributor.authorFerguson, C.A.
dc.contributor.authorSpencer, J.E.
dc.contributor.authorOrr, T.R.
dc.contributor.authorDickinson, W.R.
dc.date.accessioned2018-09-29T02:17:34Z
dc.date.available2018-09-29T02:17:34Z
dc.date.issued2003-05-01
dc.identifier.citationPeters, L., Ferguson, C.A., Spencer, J.E., Orr, T.R., and Dickinson, W.R., 2003, Sixteen 40Ar/39Ar geochronology analyses from southeastern Arizona. Arizona Geological Survey Open File Report, OFR-03-02, 46 p.
dc.identifier.urihttp://hdl.handle.net/10150/629965
dc.descriptionThe results of 40 Ar/39 Ar analyses of 15 samples of rhyolitic ash-flow tuffs and one sample of a dacitic dome from Mid-Tertiary and Cretaceous volcanic successions in the Tucson area are presented in this report. Most of the samples were collected from variably tilted Mid-Tertiary supracrustal successions surrounding the Catalina metamorphic core complex in the Tortolita Mountains, Black Mountain, San Pedro trough, and Cienega Gap areas. Four samples of Upper Cretaceous ash-flow tuffs from the Santa Rita and Roskruge Mountains were also collected. Ten samples (FO-660, FO-927, FL-354, FK-1336, FK-1702, FK-1706, FK-1707, FK-1832, FK-3062 and FK-3277) were submitted in the fall of 200 1. Sanidine was separated from all but samples FK-3062 and FK-3277 from which biotite was separated (sample preparation in Table 1). In May of 2002, six additional rhyolites were submitted (CAF-02-1680, CAF-02-3628, T02-715, JES-3-26-02-1, WRD-CPH-l and WRD-CPH-2). Sanidine was separated from all of these samples. (4 pages)
dc.language.isoen
dc.relation.ispartofseriesOFR-03-02
dc.relation.urlhttps://library.azgs.arizona.edu/
dc.rightsArizona Geological Survey. All rights reserved.
dc.subjectArizona Geological Survey Open File Reports
dc.subjectPima County
dc.subjectRoskruge Mountains
dc.subjectSanta Rita Mountains
dc.subjectSan Pedro Trough Area
dc.subjectCienega Gap Area
dc.subjectBlack Mountains
dc.subjectTortolita Mountains
dc.subjectTucson
dc.subjectArizona
dc.subjectsanidine
dc.subjectdacitic dome
dc.subjectrhyolitic ash-flow tuffs
dc.subjectgeochronology
dc.subjectargon
dc.subjectcretaceous
dc.subjectMid-Tertiary
dc.subject40 Ar/39 Ar
dc.subjectbiotite
dc.titleSixteen 40Ar/39Ar geochronology analyses from southeastern Arizona
csdgm.bounding.west-111.434
csdgm.bounding.east-110.511
csdgm.bounding.north32.3336
csdgm.bounding.south31.5598
dc.description.collectioninformationDocuments 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.dateFOA2018-09-29T02:17:34Z


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