Iron isotopic fractionation and origin of chromitites in the paleo-Moho transition zone of the Kop ophiolite, NE Turkey

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• 作者：Peng-Fei Zhang^a ; Mei-Fu Zhou^a ; ^{mfzhou@hkucc.hku.hk} ; Ben-Xun Su^b ; Ibrahim Uysal^c ; Paul T. Robinson^a ; Erdi Avcı^c ; Yong-Sheng He^d ; ^{heys@cugb.edu.cn}
• 关键词：Magnesiochromite ; Kop ophiolite ; Moho transition zone ; Fe isotopic fractionation ; Magma mixing
• 刊名：Lithos
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：268-271
• 期：Complete
• 页码：65-75
• 全文大小：2377 K
• 卷排序：268

文摘

Subsolidus Mg–Fe exchange was a main cause of the lighter δ56Fe values of chromites than their coexisting olivines. Massive crystallization of chromites happened earlier than olivines during the formation of MTZ chromitites. Magma mixing played an important role for the oversaturation of chromites in magma chambers of ophiolitic MTZ.