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Uplifted Turbidite Basins on the Seaward Wall of the Peru Trench

1974; Geological Society of America; Volume: 2; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1974)2 2.0.co;2

1943-2682

R. A. Prince, Johanna M. Resig, L. D. Kulm, T. C. Moore,

Geological and Tectonic Studies in Latin America

Research Article| December 01, 1974 Uplifted Turbidite Basins on the Seaward Wall of the Peru Trench R. A. Prince; R. A. Prince 1School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar Johanna M. Resig; Johanna M. Resig 2Hawaii Institute of Geophysics, University of Hawaii, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar L. D. Kulm; L. D. Kulm 3School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar Ted C. Moore, Jr. Ted C. Moore, Jr. 3School of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar Geology (1974) 2 (12): 607–611. https://doi.org/10.1130/0091-7613(1974)2 2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation R. A. Prince, Johanna M. Resig, L. D. Kulm, Ted C. Moore; Uplifted Turbidite Basins on the Seaward Wall of the Peru Trench. Geology 1974;; 2 (12): 607–611. doi: https://doi.org/10.1130/0091-7613(1974)2 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 Hemipelagic sediment layers inter-bedded with silt turbidite units were recovered from an elongate basin seaward of the axis of the Peru Trench. The basin is elevated 700 m above the shallowest depth of the present trench axis between lat 7°20′ and 8°30′ S. Micro-faunal content, mineralogy, and topography point to a source for this turbidite on the continental shelf to the northeast of the basin. A radiocarbon date of 5,100 B.P. was obtained for the youngest turbidite in the core, which dates the beginning of uplift in the basin. Although the nature of vertical motion is difficult to determine, the data suggest that there has been a combination of uplift of the seaward wall of the trench and subsidence of the trench axis. These rapid vertical movements may be a consequence of rupturing and decoupling of the Nazca plate into two segments that are being subducted at differential rates or different angles. If the seaward wall is under compressional stress as we suggest, we have an apparent contradiction with earthquake first motions, which indicate extensional stress on the seaward wall of this and other trenches. 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.