Major and trace element and Sr and Nd isotopic results from mantle diapirs in the Oman ophiolite: Implications for off-axis magmatic processes
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- 作者：Marie Nicollea ; mnicolle@crpg.cnrs-nancy.fr" class="auth_mail" title="E-mail the corresponding author ; David Jousselina ; Laurie Reisberga ; Delphine Boschb ; Aurore Stephanta
- 关键词：mantle ; ophiolite ; off-axis magmatism ; pyroxenite ; major and trace elements ; Sr and Nd isotopes
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：1 March 2016
- 年：2016
- 卷：437
- 期：Complete
- 页码：138-149
- 全文大小：3897 K
文摘
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Structure, petrology and geochemistry of off-axis diapir differ from on-axis case.
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Huge clinopyroxene lenses and no plagioclase in off-axis Moho Transition Zone (MTZ).
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Incompatible element depletion but “enriched” Nd isotope ratios in off-axis MTZ.
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Melting of pyroxenite-rich source and assimilation of depleted hydrated lithosphere.
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Residual melts injected into adjacent mantle and overlying crust, forming gabbros.