Extension of Laramide magmatism in southwestern North America into Trans-Pecos Texas

Abstract

Research Article| May 01, 2003 Extension of Laramide magmatism in southwestern North America into Trans-Pecos Texas A.K. Gilmer; A.K. Gilmer 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA Search for other works by this author on: GSW Google Scholar J.R. Kyle; J.R. Kyle 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA Search for other works by this author on: GSW Google Scholar J.N. Connelly; J.N. Connelly 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA Search for other works by this author on: GSW Google Scholar R.D. Mathur; R.D. Mathur 2Department of Geosciences, University of Arizona, Tucson, Arizona 85701, USA Search for other works by this author on: GSW Google Scholar C.D. Henry C.D. Henry 3Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557, USA Search for other works by this author on: GSW Google Scholar Author and Article Information A.K. Gilmer 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA J.R. Kyle 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA J.N. Connelly 1Department of Geological Sciences, University of Texas, Austin, Texas 78712, USA R.D. Mathur 2Department of Geosciences, University of Arizona, Tucson, Arizona 85701, USA C.D. Henry 3Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557, USA Publisher: Geological Society of America Received: 25 Sep 2002 Revision Received: 29 Jan 2003 Accepted: 30 Jan 2003 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (5): 447–450. https://doi.org/10.1130/0091-7613(2003)031<0447:EOLMIS>2.0.CO;2 Article history Received: 25 Sep 2002 Revision Received: 29 Jan 2003 Accepted: 30 Jan 2003 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation A.K. Gilmer, J.R. Kyle, J.N. Connelly, R.D. Mathur, C.D. Henry; Extension of Laramide magmatism in southwestern North America into Trans-Pecos Texas. Geology 2003;; 31 (5): 447–450. doi: https://doi.org/10.1130/0091-7613(2003)031<0447:EOLMIS>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 The Red Hills intrusion hosts the easternmost porphyry copper-molybdenum system in southwestern North America and consists of quartz-sulfide stockwork veins in sericitized porphyritic quartz monzonite. Zircon U-Pb and molybdenite Re-Os analyses yield ages of 64.2 ± 0.2 Ma and 60.2 ± 0.3 Ma, respectively, indicating that the Red Hills intrusion and mineralization are distinctly older than all other Tertiary magmatism (48–17 Ma) in the Trans-Pecos region of Texas, including the nearby 32 Ma Chinati Mountains caldera. The Red Hills intrusive system is contemporaneous with and genetically related to other Laramide magmatic systems (75–54 Ma) that host porphyry copper deposits in Arizona, southwestern New Mexico, and northern Mexico. These results significantly extend the Laramide magmatic province eastward and suggest that Laramide subduction-related magmatism and deformation are coextensive over a broad area of southwestern North America. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.