新甘交界红柳河地区辉长质糜棱岩的确定及其意义

北京大学学报（自然科学版）

新甘交界红柳河地区辉长质糜棱岩的确定及其意义

郭召杰,谢艳霞,马军,刘瑞,张志诚

北京大学地质学系，北京，100871

收稿日期:1995-06-13 出版日期:1996-03-20 发布日期:1996-03-20

The Discovery of Gabbric Mylonites from Hongliuhe Ophiolitic Complex, NW China

GUO Zhaojie, XIE Yanxia, MA Jun, LIU Ruixun, ZHANG Zhicheng

Department of Geology, Peking University, Beijing, 100871, zguo@geoms.geo.pku.edu.cn

Received:1995-06-13 Online:1996-03-20 Published:1996-03-20

摘要/Abstract

摘要： 新甘交界处的红柳河蛇绿岩套中发育辉长质糜棱岩，辉石、斜长石具有良好的塑性变形特征。辉长质糜棱岩主要集中于蛇绿岩套的堆晶辉长岩单元内，可能是洋壳生成后不久下部不同层次间滑脱的产物。

关键词: 红柳河蛇绿岩, 堆晶辉长岩, 辉长质糜棱岩

Abstract: The preliminary data are presented on microstructures of the gabbric mylonites from the Hongliuhe (HLH)(红柳河) ophiolitic complex, in the border area between Xinjiang and Gansu, NW China. The HLH ophiolitic complex are remnants of the Silurian South Tianshan oceanic crust, while the Mid-Tianshan Terrane collided with the Tarim plate in the Upper Carboniferous. The accumulative gabbros from the HLH ophiolites preserve a fine example of mylonitic rocks. The ductile deformation of clinopyroxene and plagioclase in HLH area are different from those in granulite terrain of North China craton. Generation of these gabbric mylonites is interpreted instead as due to ductile shear at the lower oceanic crust near the spreading centre, soon after new oceanic crust was formed.

Key words: Hongliuhe ophiolitic complex, accumulative gabbros, gabbric mylonites

中图分类号:

P545

郭召杰,谢艳霞,马军,刘瑞,张志诚 . 新甘交界红柳河地区辉长质糜棱岩的确定及其意义[J]. 北京大学学报（自然科学版）.

GUO Zhaojie,XIE Yanxia,MA Jun,LIU Ruixun,ZHANG Zhicheng. The Discovery of Gabbric Mylonites from Hongliuhe Ophiolitic Complex, NW China[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y1996/V32/I2/222