| 内蒙古东五分子地区韧性剪切变质作用的特征 |
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| 引用本文： | 刘喜山,李树勋,张履桥.内蒙古东五分子地区韧性剪切变质作用的特征[J].岩石矿物学杂志,1987,6(4):306-316. |
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| 作者姓名： | 刘喜山 李树勋 张履桥 |
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| 作者单位： | 长春地质学院
(刘喜山，李树勋)，内蒙古地质研究队(张履桥) |
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| 摘 要： | 东五分子地区花岗-绿岩地体经受了三种类型变质作用的改造。韧性剪切带不仅控制了区域变质岩组合的分布,而且也导致其变质作用的强度出现了逆转序列。根据岩石的结构、碎斑含量及矿物成分,韧性剪切变质岩划分为三类,其共同特点是具有碎斑结构。其变形结构分为单矿物型及组合型。同一块韧性剪切变质岩由处在单变平衡的一组矿物组成。根据岩石变形及重结晶的特点,结合其产状,确定出两种不同类型韧性剪切变质带。共生矿物对的研究证明它们形成于地壳不同深度及温度、压力条件。本区的金矿化、运移、沉淀与韧性剪切变质带紧密相关。
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| 关 键 词： | 糜梭岩 韧性剪切变质作用 单矿物型及组合型变形结构 碎斑结构 D—B型及B—D型带 共生矿物对 |
Characteristics of Ductile Shear Metamorphism in the Dongwufenzi Area, Inner Mongolia |
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| Liu Xishan,Li Shuxun,Zhang Luqiao Changchun College of Geology Institute of Geology,Inner Mongolia.Characteristics of Ductile Shear Metamorphism in the Dongwufenzi Area, Inner Mongolia[J].Acta Petrologica Et Mineralogica,1987,6(4):306-316. |
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| Authors: | Liu Xishan Li Shuxun Zhang Luqiao Changchun College of Geology Institute of Geology Inner Mongolia |
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| Abstract: | Granite-greenstone terrain in the Dongwufenzi area had undergone threedifferent types of metamorphism. The ductile shear zones not only controlledthe distribution of different metamorphic rock associations, but also resulted inreversed series of regional metamorphic grades. According to the contents ofporphyroclast in rock, the ductile shear metamorphic rocks can be divided intothree groups: mylonitization rock, mylonite and mylonite schist. All of the three group rocks have mylonite texture and deformationtextures can be divided into single mineral type and associated type. A ductileshear metamorphic rock consists of minerals being inuni Variant equilibrium.According to the rock association, characteristic of mylonite texture and recry-stallization in rocks, two different ductile shear metamorphic zones have beenrecognized: Ductile-Brittle type and Brittle-Ductile type, They formed at the different depth of the earth crust and conditions of temperature and pressuredetermined by calculations of coexisting mineral pairs. The results obtainedshow that the gold mineralization, transportion and deposition are related tothe ductile shear metamorphic zones closely. |
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| Keywords: | mylonite ductile shear metamorphism porphyroclast texture single mineral deformation texture associated deformation texture D-B and B-Dtype metamorphic zones coexisting mineral pairs |
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