云南省卓潘碱性杂岩体矿物学、地球化学特征及其地质意义

发布时间：2018-06-05 21:58

  本文选题：卓潘碱性杂岩体 + 电子探针　； 参考：《现代地质》2017年03期

【摘要】：卓潘杂岩体是金沙江—哀牢山富碱侵入岩带的重要组成部分,位于兰坪盆地西部。岩体主要由辉长岩、辉石岩及正长岩组成,各岩石的K_2O含量为0.96%~7.36%,Na_2O含量为0.52%~6.62%,Na_2O+K_2O含量为1.98%~8.97%,K_2O/Na_2O比值介于0.35~11.15之间,属于高钾、富碱的钾玄岩系列。岩石中的辉石为透辉石,长石主要为钠长石(An5)和正长石,黑云母为镁质黑云母。计算获得辉石的结晶温度范围介于1 070~1 490℃之间。各矿物成分特征表明卓潘杂岩体属于富铁、高氧逸度的岩浆体系,形成于后碰撞的挤压环境向伸展环境转换的构造背景。
[Abstract]:The Zhuopan complex is an important part of the Jinshajiang-Ailaoshan alkali-rich intrusive rock belt, located in the western part of the Lanping basin. The rock mass is mainly composed of gabbro, pyroxenite and syenite. The K _ 2O content of each rock is 0.96 / 7.36 and the content of Na2O is 0.52 / 6.62. The K _ 2O / Na _ 2O ratio of K _ 2O / Na _ 2O is between 0.3511.15 and belongs to the series of high-potassium and alkali-rich kalomite. The pyroxene in the rock is diopside, the feldspar is mainly albite An5) and orthoclase, and the biotite is magnesia biotite. The crystallization temperature range of pyroxene is from 1 070 鈩，

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