Title: Paleomagnetism of Cretaceous volcanic rocks from central Chile and implications for the tectonics of the Andes
Abstract: Research Article| February 01, 1986 Paleomagnetism of Cretaceous volcanic rocks from central Chile and implications for the tectonics of the Andes Myrl E. Beck, Jr.; Myrl E. Beck, Jr. 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Robert E. Drake; Robert E. Drake 2Department of Geology, University of California, Berkeley, California 94720 Search for other works by this author on: GSW Google Scholar Robert F. Butler Robert F. Butler 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Author and Article Information Myrl E. Beck, Jr. 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Robert E. Drake 2Department of Geology, University of California, Berkeley, California 94720 Robert F. Butler 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (2): 132–136. https://doi.org/10.1130/0091-7613(1986)14<132:POCVRF>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Myrl E. Beck, Robert E. Drake, Robert F. Butler; Paleomagnetism of Cretaceous volcanic rocks from central Chile and implications for the tectonics of the Andes. Geology 1986;; 14 (2): 132–136. doi: https://doi.org/10.1130/0091-7613(1986)14<132:POCVRF>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 mean direction of remanent magnetization in well-dated, structurally and petrologically simple Cretaceous ash-flow tuffs from the central valley of Chile, near Santiago, indicates that the region has undergone a small (about 14°) clockwise rotation. Two other paleomagnetic studies on Cretaceous rocks from coastal Chile give a similar result. We tentatively attribute these rotations to dextral shear caused by oblique subduction of the Nazca plate beneath South America. In contrast, Cretaceous rocks from Peru seem from paleomagnetic evidence to have been rotated counterclockwise relative to the stable interior of the continent. This sense of apparent rotation agrees with the sense of deflection of geologic trends from north-south to north-northwest at about the Peru-Chile border (the Arica deflection). On the basis of these observations, several authors have suggested that the Arica deflection is an orocline. However, uncertainty in all such paleomagnetic interpretations is introduced by what seems to be a very streaked distribution of Cretaceous reference poles from the South American craton. The cause of this streaking is not known. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 39
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