Oriented structures in Yuechengling granite pluton
Oriented structures in Yuechengling granite pluton
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发表时间：
2002
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通讯作者：
Liangxu Jin
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作者：
Liangxu Jin
月城岭花岗岩岩体的定向构造包括断裂变质与剪切冲蚀构造、韧性剪切构造、遗迹区域变质构造、模拟置换生长构造和碎裂流构造，其中断裂变质与剪切冲蚀构造是基本的造岩构造，韧性剪切构造是最重要的叠加构造。韧性剪切带剪切意义为正左旋，古应力差为55 ~ 135 MPa，古应变速率为9.6×10 -12 ~ 3.5×10 -10 / s，形成绿片岩相变形变质作用。月城岭花岗岩体西段的片麻岩构造可能与新宁紫源断裂的长期活动有关。
The oriented structures in the Yuechengling granite pluton include fault metamorphic and shear anatectic,ductile shear,relic regional metamorphic,mimetic replacement and growth and cataclastic flow structures,among which the fault metamorphic and shear anatectic structures are basic rock forming structures,and the ductile shear structures are the most important superimposed ones. The shear sense of ductile shear zones is normal sinistral with the paleo stress difference ranging from 55 to 135 MPa and paleo strain rate from 9.6×10 -12 to 3.5×10 -10 per second,resulting in forming of greenschist facies distortional metamorphism. The gneissic structures in the west part of the Yuechengling granite pluton might be associated with the long term activatity of the Xinning Ziyuan fault.