Mg-O isotopes trace the origin of Mg-rich fluids in the deeply subducted continental crust of Western Alps
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- 作者：Yi-Xiang Chena ; yxchen07@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Hans-Peter Schertlb ; Yong-Fei Zhenga ; Fang Huanga ; Kun Zhoua ; Ying-Zeng Gonga
- 关键词：whiteschist ; Mg isotopes ; O isotopes ; metasomatism ; subduction channel ; serpentinite
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 December 2016
- 年：2016
- 卷：456
- 期：Complete
- 页码：157-167
- 全文大小：3399 K
文摘
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The Mg-rich whiteschist in Western Alps has a protolith of Permian granite.
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Low δ18O metamorphic zircon indicates metasomatism by low δ18O fluids.
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High δ26Mg values for whiteschist suggest metasomatism by high δ26Mg fluids.
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The metasomatic fluid was derived from dehydration of talc and antigorite in serpentinite.
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The supracrustal rock was infiltrated by the Mg-rich fluid at the slab–mantle interface.