| 吴川-四会断裂带大王山花岗岩早期韧性变形特征 |
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| 引用本文： | 周永生,何绍勋.吴川-四会断裂带大王山花岗岩早期韧性变形特征[J].桂林工学院学报,1989(2). |
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| 作者姓名： | 周永生 何绍勋 |
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| 作者单位： | 桂林冶金地质学院，中南工业大学 长沙 |
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| 摘 要： | 大王山剪切带内出现一系列规模不等的糜棱岩条带,广泛发育S面理和C面理,还出现一系列次级拉伸折劈理、剪切条带和不对称小褶纹。剪切带中的石英、云母等基质矿物以塑性变形为主,出现动态重结晶、亚晶、波状消光等显微构造。长石主要以破裂和香肠化为主,出现粒内的张裂隙和肿缩构造。石英和长石存在明显的流变学差异。通过构造和显微构造特征判定,大王山剪切带为右旋剪切带。吴川-四会断裂曾经历过右旋韧性剪切作用。
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| 关 键 词： | 断裂带 剪切带 花岗岩 岩组学 广东 |
STRUCTURAL CHARACTERISTICS OF EARLY-FORMED DUCTILE DEFORMATION OF DAWANGSHAN GRANITOID IN THE WUCHUAN-SIHUI FAULT ZONE |
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| Zhou Yongsheng,He Shaoxun Guilin College of Geology Cetral South University of Technology,Changsha.STRUCTURAL CHARACTERISTICS OF EARLY-FORMED DUCTILE DEFORMATION OF DAWANGSHAN GRANITOID IN THE WUCHUAN-SIHUI FAULT ZONE[J].Journal of Guilin University of Technology,1989(2). |
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| Authors: | Zhou Yongsheng He Shaoxun Guilin College of Geology Cetral South University of Technology Changsha |
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| Abstract: | A series of mylonite bands, S-cleavages, C-cleavages, secondary ex-tensional crenulation cleavages, shear bands and minor asymmetric foldsare developed in the Dawangshan shear zone where quartz, mica andother matrix minerals mainly suffered plastic deformation and micro-structures such as dynamic recrystallization. subgrain, wave extinctionetc. were formed. Feldspar mainly experienced brittle deformation. Frac-tures, boudinages, pinch-and-swell structures etc. were formed. It isobvious that there was flow difference between quartz and feldspar.Observed and measured structures and microstructures suggest thatthe Dawangshan shear zone is a dextral or clockwise and the Wuchuan-Sihui fault zone underwent dextral ductile deformation. |
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| Keywords: | fault zone shear zone granite petro-fabrics Guangdong |
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