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MORB emplacement and structure: Insights from the Semail Ophiolite, Oman
Author(s) -
Pezard Philippe A.,
Einaudi Florence,
Hermitte Daniel,
Cochemé JeanJacques,
Coulon Christian,
Laverne Christine
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011877
Subject(s) - geology , ophiolite , lava , seafloor spreading , geochemistry , volcanism , geophysics , volcano , petrology , dredging , earth science , seismology , tectonics , oceanography
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.