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新街岩体铁钛矿中磁铁矿出溶片晶的发现及其成因机制
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摘要
<正>钛铁矿(FeTiO_3)和赤铁矿(Fe_2O_3)在高温条件(大于650℃)下能够以异价类质同像置换的方式2Fe~(3+)→Ti~(4+)+Fe~(2+),形成钛铁矿-赤铁矿固溶体(以下简称钛铁矿固溶体)。由于钛铁矿固溶体中Fe~(3+)的含量与结晶时的温度和氧逸度直接相关,因此,钛铁矿固溶体是岩石学研究中多种"温度-氧逸度计"的重要组成部分。另外,钛铁矿固溶体在不同类型的岩石中分布广泛,一直是地磁学领域中重要的载磁矿物。钛铁矿固溶体在不混溶温度(约600-700℃)的范围内会
引文
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    [4]Tan W He H,Wang C Y,Xing C,Liang X,Zhu J.Magnetite exsolution in ilmenite from the Fe-Ti oxide gabbro in the Xinjie intrusion,SW China[J].American Mineralogist(待刊).
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