Rapid Eocene extension in the Robinson district, White Pine County, Nevada: Constraints from 40Ar/39Ar dating

Abstract

Research Article| June 01, 2001 Rapid Eocene extension in the Robinson district, White Pine County, Nevada: Constraints from 40Ar/39Ar dating Phillip B. Gans; Phillip B. Gans 1Department of Geological Sciences, University of California, Santa Barbara, California 93106-9630, USA Search for other works by this author on: GSW Google Scholar Eric Seedorff; Eric Seedorff 2Specialty Product Systems LLC, 6336 North Oracle Road, Suite 326, PMB 387, Tucson, Arizona 85704-5480, USA Search for other works by this author on: GSW Google Scholar Patrick L. Fahey; Patrick L. Fahey 37831 Wade Springs Drive, Tucson, Arizona 85743, USA Search for other works by this author on: GSW Google Scholar Richard W. Hasler; Richard W. Hasler 4BHP Tintaya S.A., Avenida San Martín 301, Urbanización Vallecito, Arequipa, Peru Search for other works by this author on: GSW Google Scholar David J. Maher; David J. Maher 57920 North Royal Court, Tucson, Arizona 85704, USA Search for other works by this author on: GSW Google Scholar Richard A. Jeanne; Richard A. Jeanne 63055 Natalie Street, Reno, Nevada 89509-3873, USA Search for other works by this author on: GSW Google Scholar Stephen A. Shaver Stephen A. Shaver 7Department of Forestry and Geology, 735 University Avenue, University of the South, Sewanee, Tennessee 37383-1000, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Phillip B. Gans 1Department of Geological Sciences, University of California, Santa Barbara, California 93106-9630, USA Eric Seedorff 2Specialty Product Systems LLC, 6336 North Oracle Road, Suite 326, PMB 387, Tucson, Arizona 85704-5480, USA Patrick L. Fahey 37831 Wade Springs Drive, Tucson, Arizona 85743, USA Richard W. Hasler 4BHP Tintaya S.A., Avenida San Martín 301, Urbanización Vallecito, Arequipa, Peru David J. Maher 57920 North Royal Court, Tucson, Arizona 85704, USA Richard A. Jeanne 63055 Natalie Street, Reno, Nevada 89509-3873, USA Stephen A. Shaver 7Department of Forestry and Geology, 735 University Avenue, University of the South, Sewanee, Tennessee 37383-1000, USA Publisher: Geological Society of America Received: 29 Sep 2000 Revision Received: 06 Feb 2001 Accepted: 09 Feb 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (6): 475–478. https://doi.org/10.1130/0091-7613(2001)029<0475:REEITR>2.0.CO;2 Article history Received: 29 Sep 2000 Revision Received: 06 Feb 2001 Accepted: 09 Feb 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Phillip B. Gans, Eric Seedorff, Patrick L. Fahey, Richard W. Hasler, David J. Maher, Richard A. Jeanne, Stephen A. Shaver; Rapid Eocene extension in the Robinson district, White Pine County, Nevada: Constraints from 40Ar/39Ar dating. Geology 2001;; 29 (6): 475–478. doi: https://doi.org/10.1130/0091-7613(2001)029<0475:REEITR>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Precise 40Ar/39Ar ages on pretectonic, syntectonic, and posttectonic rhyolites from the Robinson mining district, which is within a highly extended domain in east-central Nevada, indicate that extreme extension (∼400%) occurred in fewer than 900 k.y. during the Eocene. The duration of extension is tightly delimited by an Eocene lacustrine unit that was horizontal prior to extension and by younger rhyolitic units. The rhyolites represent at least five eruptive episodes, including the preextensional and synextensional rhyolite of White Hill emplaced between 37.6 and 37.4 Ma, and the postextensional rhyolite of Garnet Hill emplaced at 36.7 Ma, although some of it is perhaps as old as 37.1 Ma. Thus, the duration of extreme extension at Robinson was between 0.9 and 0.3 m.y., comparable to or shorter than other highly extended areas in western North America. The extensional domain in east-central Nevada is a composite feature, produced by localized, episodic, rapid extension that began in early Eocene time and continued to at least middle Miocene time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.