Synextensional Pliocene–Pleistocene eruptive activity in the Camargo volcanic field, Chihuahua, México

Abstract

Research Article| March 01, 2003 Synextensional Pliocene–Pleistocene eruptive activity in the Camargo volcanic field, Chihuahua, México José Jorge Aranda-Gómez; José Jorge Aranda-Gómez 1Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, P.O. Box 1-742, Querétaro, Querétaro 76001, México Search for other works by this author on: GSW Google Scholar James F. Luhr; James F. Luhr 2Department of Mineral Sciences, NHB-119, Smithsonian Institution, Washington, D.C. 20560, USA Search for other works by this author on: GSW Google Scholar Todd B. Housh; Todd B. Housh 3Department of Geological Sciences, University of Texas at Austin, Austin, Texas 78712, USA Search for other works by this author on: GSW Google Scholar Charles B. Connor; Charles B. Connor 4Department of Geology, University of South Florida, Tampa, Florida 33620, USA Search for other works by this author on: GSW Google Scholar Tim Becker; Tim Becker 5Berkeley Geochronology Center, Berkeley, California 94709, USA Search for other works by this author on: GSW Google Scholar Christopher D. Henry Christopher D. Henry 6Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557-0088, USA Search for other works by this author on: GSW Google Scholar Author and Article Information José Jorge Aranda-Gómez 1Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, P.O. Box 1-742, Querétaro, Querétaro 76001, México James F. Luhr 2Department of Mineral Sciences, NHB-119, Smithsonian Institution, Washington, D.C. 20560, USA Todd B. Housh 3Department of Geological Sciences, University of Texas at Austin, Austin, Texas 78712, USA Charles B. Connor 4Department of Geology, University of South Florida, Tampa, Florida 33620, USA Tim Becker 5Berkeley Geochronology Center, Berkeley, California 94709, USA Christopher D. Henry 6Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557-0088, USA Publisher: Geological Society of America Received: 28 Jun 2001 Revision Received: 01 May 2002 Accepted: 09 Jul 2002 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2003) 115 (3): 298–313. https://doi.org/10.1130/0016-7606(2003)115<0298:SPPEAI>2.0.CO;2 Article history Received: 28 Jun 2001 Revision Received: 01 May 2002 Accepted: 09 Jul 2002 First Online: 01 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 José Jorge Aranda-Gómez, James F. Luhr, Todd B. Housh, Charles B. Connor, Tim Becker, Christopher D. Henry; Synextensional Pliocene–Pleistocene eruptive activity in the Camargo volcanic field, Chihuahua, México. GSA Bulletin 2003;; 115 (3): 298–313. doi: https://doi.org/10.1130/0016-7606(2003)115<0298:SPPEAI>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 SocietyGSA Bulletin Search Advanced Search Abstract The Camargo volcanic field is the largest mafic alkalic volcanic field in the Mexican Basin and Range province, and the relationship between volcanism and normal faulting is especially strong. The Camargo volcanic field lies in the northern part of the province, midway between the Sierra Madre Occidental and Trans-Pecos Texas. It is formed by Pliocene–Pleistocene (4.7–0.09 Ma) intraplate mafic alkalic volcanic rocks, some of which contain peridotite, pyroxenite, and granulite xenoliths. The volcanic field covers ∼3000 km2 and has an estimated volume of ∼120 km3 erupted from >300 recognized vents. Twenty-six new 40Ar/39Ar age determinations for the Camargo volcanic field and its environs show that volcanic activity began in the southwest part of the field and shifted toward the northeast at ∼15 mm/yr. The average magmatic eruption rate during growth of the field was ∼0.026 km3/k.y.The Camargo volcanic field lies within an accommodation zone with west-dipping faults and east-tilted blocks to the north and east-dipping faults and west-tilted blocks to the south. These faults are expressed in the volcanic field by a N30°W-trending graben with scarps up to ∼100 m high through its central part. Volcanism and faulting were at least in part coeval, and younger volcanic products commonly drape fault scarps that cut earlier lavas. Normal faulting is bracketed between 4.7 and 2.1 Ma and may have also migrated northeastward. Estimated vertical slip rates on four Pliocene faults range from 0.03 mm/yr, a likely long-term rate, to 1.67 mm/yr, interpreted as a short-term rate operative during periods of active faulting. Northwest-striking normal faults that cut alluvial-fan deposits and Pleistocene lavas in the northern Camargo volcanic field and geomorphic evidence for recent uplift to the south of the volcanic field suggest that the region is still extending. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.