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GEOREF RECORD

Ophiolites and their origins

Yildirim Dilek and Harald Furnes
Ophiolites and their origins (in Ophiolites, Yildirim Dilek (editor) and Harald Furnes (editor))
Elements (April 2014) 10 (2): 93-100

Abstract

Ophiolites are suites of temporally and spatially associated ultramafic, mafic, and felsic rocks that are interpreted to be remnants of ancient oceanic crust and upper mantle. Ophiolites show significant variations in their internal structure, geochemical fingerprints, and emplacement mechanisms. These differences are controlled by (1) the proximity, when formed at the magmatic stage, to a plume or trench; (2) the rate, geometry, and nature of ocean-ridge spreading; (3) mantle composition, temperature, and fertility; and (4) the availability of fluids. The oceanic crust preserved in ophiolites may form in any tectonic setting during the evolution of ocean basins, from the rift-drift and seafloor spreading stages to subduction initiation and terminal closure. An ophiolite is emplaced either from downgoing oceanic lithosphere via subduction-accretion or from the upper plate in a subduction zone through trench-continent collision. Subduction zone tectonics is thus the most important factor in the igneous evolution of ophiolites and their emplacement into continental margins.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 10
Serial Issue: 2
Title: Ophiolites and their origins
Title: Ophiolites
Author(s): Dilek, YildirimFurnes, Harald
Author(s): Dilek, Yildirimeditor
Author(s): Furnes, Haraldeditor
Affiliation: Miami University, Department of Geology and Environmental Earth Science, Oxford, OH, United States
Affiliation: Miami University, Department of Geology and Environmental Earth Science, Oxford, OH, United States
Pages: 93-100
Published: 201404
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 32
Accession Number: 2014-062694
Categories: Igneous and metamorphic petrologySolid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 table, geol. sketch map
Secondary Affiliation: University of Bergen, NOR, NorwayUniversity of Bergen, NOR, Norway
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201433
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