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Multistage melange formation within an accretionary complex, Diego Ramirez Islands, southern Chile

1989; Geological Society of America; Volume: 17; Issue: 1 Linguagem: Inglês

10.1130/0091-7613(1989)017 2.3.co;2

1943-2682

T. J. Wilson, Richard E. Hanson, Anne Grunow,

Geological and Tectonic Studies in Latin America

Research Article| January 01, 1989 Multistage melange formation within an accretionary complex, Diego Ramirez Islands, southern Chile Terry J. Wilson; Terry J. Wilson 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Richard E. Hanson; Richard E. Hanson 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Anne M. Grunow Anne M. Grunow 2Lamont-Doherty Geological Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information Terry J. Wilson 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Richard E. Hanson 1Department of Geology and Mineralogy, Ohio State University, Columbus, Ohio 43210 Anne M. Grunow 2Lamont-Doherty Geological Observatory, Palisades, New York 10964 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1989) 17 (1): 11–14. https://doi.org/10.1130/0091-7613(1989)017 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 Terry J. Wilson, Richard E. Hanson, Anne M. Grunow; Multistage melange formation within an accretionary complex, Diego Ramirez Islands, southern Chile. Geology 1989;; 17 (1): 11–14. doi: https://doi.org/10.1130/0091-7613(1989)017 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 Accretionary complex rocks on the Diego Ramirez Islands of southern Chile formed during subduction along the convergent Pacific margin of Gondwanaland. Tectonic melange was produced during a sequence of deformation phases that included early (prelithification?) strata) disruption; isoclinal folding and ductile shearing associated with dynamothermal metamorphism; and postmetamorphic cataclastic flow and brittle faulting. Stratal disruption and melange formation are interpreted to have begun during initial underthrusting beneath the accretionary prism, and to have continued by ductile processes at deeper levels during progressive underthrusting-underplating. Pervasive cataclastic shearing to produce a later generation of melange, followed by slip along two generations of discrete fault zones, occurred as underplated material was tectonically transported to progressively higher levels within the accretionary prism. The multiple stages of melange formation reflect strata) disruption in distinct deformation regimes associated with different structural levels of the accretionary prism. 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.