MORB emplacement and structure: Insights from the Semail Ophiolite, Oman

As opposed to discontinuous seafloor dredging and coring, ophiolites and downhole geophysical measurements provide continuous sections along which high frequency accretion processes at mid‐ocean ridges may be studied. A multidisciplinary study carried out on a volcanic section of the Semail ophiolit...

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Bibliographic Details
Published in:Geophysical research letters 2000-12, Vol.27 (23), p.3933-3936
Main Authors: Pezard, Philippe A., Einaudi, Florence, Hermitte, Daniel, Cochemé, Jean-Jacques, Coulon, Christian, Laverne, Christine
Format: Article
Language:English
Subjects:
Crystalline rocks
Earth sciences
Earth, ocean, space
Exact sciences and technology
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Marine
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Summary:As opposed to discontinuous seafloor dredging and coring, ophiolites and downhole geophysical measurements provide continuous sections along which high frequency accretion processes at mid‐ocean ridges may be studied. A multidisciplinary study carried out on a volcanic section of the Semail ophiolite with MORB‐like chemical composition reveals two main petrological and geochemical members. The boundary between the two is marked by the presence of a massive flow equating to the most primitive lava sampled, and across which significant changes are obtained. Petrophysical profiles are correlated to geochemical variations and provide thus a description of the magmatic activity through time. These temporal variations may be compared to those derived from crustal drilling and continuous logging measurements.
ISSN:0094-8276
1944-8007
DOI:10.1029/2000GL011877