Tectonic shortening and crustal thickness in the Central Andes: How good is the correlation? 论文

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Research Article| August 01, 1998 Tectonic shortening and crustal thickness in the Central Andes: How good is the correlation? Jonas Kley; Jonas Kley 1Geologisches Institut, Universität Karlsruhe, P.O. Box 6980, D-76128 Karlsruhe, Germany Search for other works by this author on: GSW Google Scholar César R. Monaldi César R. Monaldi 2Universidad Nacional de Salta-Conicet, Buenos Aires 177, 4400 Salta, Argentina Search for other works by this author on: GSW Google Scholar Author and Article Information Jonas Kley 1Geologisches Institut, Universität Karlsruhe, P.O. Box 6980, D-76128 Karlsruhe, Germany César R. Monaldi 2Universidad Nacional de Salta-Conicet, Buenos Aires 177, 4400 Salta, Argentina Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1998) 26 (8): 723–726. https://doi.org/10.1130/0091-7613(1998)026<0723:TSACTI>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jonas Kley, César R. Monaldi; Tectonic shortening and crustal thickness in the Central Andes: How good is the correlation?. Geology 1998;; 26 (8): 723–726. doi: https://doi.org/10.1130/0091-7613(1998)026<0723:TSACTI>2.3.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 Exceptional thickening of continental crust beneath the Central Andes is believed to be mainly a result of tectonic shortening of the South American plate in Neogene time. This shortening has been estimated to have contributed as much as 70%–80% of the present crustal volume. A compilation of published shortening values and our own estimates based on balanced cross sections from the Central Andes between lat 3°S and 40°S suggest that 70%–80% is a maximum rather than an average value for this part of the Andes. Tectonic shortening and the crustal cross-section area are only loosely correlated. Variations in tectonic shortening are more abrupt than those of crustal areas, particularly near the northern and southern ends of the Altiplano-Puna high plateau, where thick crust is associated with relatively small amounts of shortening. Shortening there may account for no more than about 30% of the present crustal cross-section area. The processes that created the remaining crustal area are not clear, but are likely to involve poorly constrained pre-Neogene tectonic shortening, moderate magmatic additions to the crust, tectonic underplating of material derived from the forearc, and possible flow of ductile lower crust along strike. This content is PDF only. Please click on the PDF icon to access. 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.