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Tuesday, May 5, 2020 | History

5 edition of Ophiolites and oceanic crust found in the catalog.

Ophiolites and oceanic crust

new insights from field studies and the ocean drilling program

  • 72 Want to read
  • 22 Currently reading

Published by Geological Society of America in Boulder, Colo .
Written in English

    Subjects:
  • Ophiolites,
  • Ocean bottom,
  • Earth -- Crust

  • Edition Notes

    Includes bibliographical references and index.

    Statementedited by Yildirim Dilek ... [et al.].
    SeriesSpecial paper -- 349, Special papers (Geological Society of America) -- 349.
    ContributionsDilek, Yildirim, 1957-
    Classifications
    LC ClassificationsQE462.O6 O635 2000
    The Physical Object
    Paginationviii, 552 p. :
    Number of Pages552
    ID Numbers
    Open LibraryOL15498187M
    ISBN 100813723493
    LC Control Number00030831
    OCLC/WorldCa43885801

    An ophiolite is a section of the Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea rocks which make up ophiolites are an altered form of basalt. The rocks are often green.. They are found in the mountain belts such as the Alps or the show where former ocean basins were consumed by subduction. The present title of Mantle and Lower Crust Exposed in Oceanic Ridges and in Ophiolites shows that the center of inter­est has slightly shifted with respect to the initial objective: in order to under­ stand the processes involved in accretion taking place at oceanic ridges, it is crucial to study the interaction between uppermost mantle and.

    Get this from a library! Ophiolites and oceanic crust: new insights from field studies and the ocean drilling program. [Yildirim Dilek;].   Ophiolites are distinctive assemblages of mafic, ultramafic, and felsic igneous rocks that are commonly thought to represent oceanic crust and mantle that has been accreted to a continental margin. The accretion of ophiolite and island arc terranes has been the primary mechanism of continental growth since the Proterozoic.

    oceanic crust and ophiolites. Henry Dick compared structural and magmatic pro-cesses at spreading centers, as seen from in situ lower oceanic crust and shallow mantle. He discussed large variations in the stratigraphy of the ocean crust at slow-spreading ridges, reflecting along-axis transport of melt in the lower crust from aFile Size: 59KB. Ophiolite suites. Since the late s, the term ophiolite has been used to describe sections of oceanic crust and upper mantle, along with sedimentary rocks deposited on the sea floor, emplaced as thrust slices onto continental process, called obduction, results from continent-continent collision following subduction of oceanic crust and the closure of oceans or back-arc basins.


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Ophiolites and oceanic crust Download PDF EPUB FB2

In oceanic crust: Study of ophiolites. Great strides in understanding the oceanic crust were made by the study of ophiolites. These are slices of the ocean floor that have been thrust above sea level by the action of plate tectonics. In various places in the world, the entire sequence of Read More; plate tectonics.

Ophiolites are remnants of oceanic crust and upper mantle, emplaced tectonically and at low temperature on a cratonic or oceanic substratum (Coleman, ; Dilek et al., ; Hess, ; ; Moores, ; Temple and Zimmerman, ). Ophiolites and related terranes are considered to be key aspects for the understanding of orogeny.

The purpose of this book is to provide a starting point for anyone interested in the background and state of knowledge concerning ophiolites (ancient oceanic lithosphere). Because ophiolites represent fragments of old oceanic crust their tectonic setting and age are extremely important in the reconstruction of ancient plate by: The purpose of this book is to provide a starting point for anyone interested in the background and state of knowledge concerning ophiolites (ancient oceanic lithosphere).

Because ophiolites represent fragments of old oceanic crust their tectonic setting and age are extremely important in the reconstruction of ancient plate : Springer-Verlag Berlin Heidelberg.

Outstanding problems include differences between the chemical properties of Ophiolites and rocks thought to represent present-day oceanic cr12, the lack in some complexes of recognised dyke Cited by: Comparison of volcanic construction in the Troodos Ophiolite and oceanic crust using paleomagnetic inclinations from Cyprus Crustal Study Project (CCSP) CY-1 and CY-1A and Ocean Drilling Program (ODP) B drill cores.

Through comparisons with ophiolites (sections of oceanic or oceanic-like crust exposed on land), exposures of faulted oceanic crust, and laboratory measurements of rock samples, a generalized view of crustal structure has emerged, where seismic layer 2 corresponds with the extrusive rocks and dikes of the upper crust, and where seismic layer 3.

Franciscan-type ophiolites are accreted pieces of oceanic crust scraped off the subducted plate onto the upper plate, as in Japan today. Like so much in geology, ophiolites started out simple and are growing more complex as the data and theory of plate tectonics become more : Andrew Alden.

Ophiolites are pieces of oceanic plate that have been thrusted (obducted) onto the edge of continental plates. They provide models for processes at mid-ocean ridges. Ophiolites are an assemblage of mafic and ultramafic lavas and hypabyssal rocks found in association with sedimentary rocks like. Rock types similar to those found in ophiolites have been recovered from the floors of ocean basins 1– is critical evidence for the theory that ophiolites represent the ocean crust 4,5 Cited by: 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. An "ophiolite" is a section of the Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea level and often emplaced onto continental crustal rocks.

Editorial Reviews. Ophiolites are distinctive assemblages of malic to ultramalic rocks representing fragments of the oceanic lithosphere.

Nicolas (tectonophysics, U. of Montpelier) establishes a global comparison between ophiolites and their various oceanic environments, to aid in understanding the physical processes of the accretion and evolution of the oceanic lithosphere, and the use of Author: A.

Nicolas. Oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries.

Oceanic crust is about 6 km (4 miles) thick. It is composed of several layers, not including the overlying sediment. Studies of oceanic crust exposed in tectonic windows and in ophiolites have revealed the importance of normal faulting and attendant tilting of upper crustal rock units in the accretion process at.

oceanic crust definition: 1. the part of the outer rocky layer of the earth that is under the oceans and is thinner than the. Learn more. In: Dilek Y, Moores EM, Elthon D, Nicolas A (eds) Ophiolites and oceanic crust: new insights from field studies and the ocean drilling program, special paper Geological Society of America, Boulder, CO, pp – CrossRef Google ScholarAuthor: Jeffrey Alan Karson.

The diagram to the right shows an cross-section of such an ophiolite. To be precise, it shows a cross-section of a vertical ophiolite, in which the layers are horizontal and the sheets are vertical.

We may perfectly well find an ophiolite lying on its side, as a result of the tectonic events that emplace it; but the relationships between the rocks remain the same. The Mesozoic Rocas Verdes are a group of mafic igneous complexes in the southernmost Andes.

They consist of pillow lavas, dykes and gabbros, interpreted as the upper parts of ophiolites formed along mid-ocean-ridge-type spreading centres that rifted the southwestern margin of the Gondwana continental crust, during the onset of spreading in the South Atlantic, to form the mafic igneous part of.

Read "Mantle and Lower Crust Exposed in Oceanic Ridges and in Ophiolites Contributions to a Specialized Symposium of the VII EUG Meeting, Strasbourg, Spring " by available from Rakuten Kobo. This volume follows a Specialized Symposium on Brand: Springer Netherlands. Shadows over Oman mantle peridotite, January def.

Ophiolite:An ophiolite is a segment of ocean crust and mantle tectonically exposed on land by obduction (overthrust), usually when an ocean basin closes. An ophiolite sequence consists of variably altered oceanic rocks, including marine sediments, ocean crust, and part of the mantle.

The name ophiolite means “snakestone” from “ophio.Learn ophiolite with free interactive flashcards. Choose from 7 different sets of ophiolite flashcards on Quizlet.Lithology of ophiolites and seismic structure of the oceanic crust.- Serpentinite sea-floor in slow spreading environments and LOT.- Abyssal and ophiolitic peridotites.- Serpentinized peridotites as sea-floor.-