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地质通报  2003 

吉林延边开山屯地区蓝片岩相变质作用――来自硬绿泥石+纤锰柱石+多硅白云母组合的证据

, PP. 651-654

Keywords: 开山屯低级变质作用硬绿泥石+纤锰柱石蓝片岩相延边缝合带

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Abstract:

吉林延边开山屯低级变质作用发育于兴凯地块西南晚古生代活动大陆边缘,这里产出二叠纪末的消减增生杂岩。低级变质作用矿物除冻蓝闪石、阳起石、玉髓、黝帘石、多硅白云母、绿泥石、钠长石外,还在灰黑色变泥质岩中发现硬绿泥石纤锰柱石多硅白云母组合。这是国内首次报道的以泥质岩为原岩并具有硬绿泥石纤锰柱石标志矿物组合的蓝片岩相岩石。研究表明,该组合的形成温度290.14(或370.8)℃,具明显的低温特征。

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