西昆仑麻扎构造混杂带变形特征
The Deformation Characteristics of Mazha Tectonic Melange in West Kunlun
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摘要: 麻扎构造混杂带南北边界断裂具有明显的韧性变形特征,笔者通过野外区域地质调查重新对混杂带边界断裂建立了新的认识,认定南北边界断裂具有早期韧性剪切与晚期脆性活动的多期次构造活动特征.早起韧性剪切发育了大量糜棱岩化与不对称旋转碎斑现象.通过对北边界断裂火山弧岩块的岩石化学分析,得出了麻扎构造混杂岩带内大量出露的岩浆岩形成于板块边缘的岛弧构造环境的结论.Abstract: South and north boundary faults of the Mazha tectonic melange belt have obvious deformation and toughness. Through field regional geological survey, the author aimed to establish a new understanding of the mixed boundary fault zone, and found that the north and south boundary faults have multiple periods of tectonic features of early ductile shear and late brittle activities. The early ductile shear developed a lot of mylonitization and asymmetry rotated porphyroclast phenomenon. Through the petrochemical analysis on north boundary fault arc volcano rock, it is concluded that the widespread magmatite in Mazha tectonic melange belt formed in the island arc tectonic environment on the edge of the plate.
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Key words:
- Mazha tectonic melange /
- boundary fault /
- magmatic arc /
- tectonic environment
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陕西省地质调查院.中华人民共和国区域地质报告[R],1:25万《麻扎幅》,2004.
李荣社,计文华,杨永成.昆仑山及邻区地质[M].北京:地质出版社,2008 Li Rongshe,Ji Wenhua, Yang Yongcheng.Geology of Kunlun mountains and adjacent regions[M]. Geological Publishing House,Beijing, 2008.
丁道桂, 王道轩, 刘伟新, 等.西昆仑造山带与盆地[M].北京: 地质出版社, 1996: 9-148.
Ding Dogui,Wang Daoxuan,Liu Weixin.The westernnkunlun orogenic belt and basin[M]. Geological Publishing House, Beijing,1996:9-148.
张志德,李嵩龄,杨德朴,等.康西瓦断裂的地质特征及形成和发展[J].新疆地质.1987,(3):50-57.
Zhang Zhide,Li Songling,Yang Depu, et al. The Geologic Characteritics of Kangxiwa Fault and its formation and evelopment[J].Xinjiang Geology,1987,(3):50-57.
李向东,王元龙,黄智龙.康西瓦走滑构造带及其大地构造意义[J].新疆地质.1996,(3):204-212.
Li Xiangdong,Wang Yuanlong, Huang Zhilong.Kangxiwa Shove Tectonic bell and its significance[J].Xinjiang Geology,1996,(3):204-212.
潘裕生.西昆仑山构造特征与演化[J].地质科学.1990,(03):224-232 Pan Yusheng.Structures and evolution of the multiple accretionary complexes,western kunlun orogenic belt(China)[J].Geoscience,1990,(3):224-232.
潘桂棠,李兴振,王立全,等.青藏高原及邻区大地构造单元初步划分[J].地质通报.2002,21(11):701-707.
Pan Guitang,Li Xingzhen,Wang Liquan, et al.Preliminary division of tectonic units of the Qinghai-Tibet Plateau and its adjacent regions[J]. Geological Bulletin of China,2002,21(11):701-707.
许志琴, 戚学祥,杨经绥,等.西昆仑康西瓦韧性走滑剪切带的两类剪切指向、形成时限及其构造意义[J].地质通报,2007,26(10):1252-1261.
Xu Z Q,Qi X X,Yang J S.Senses and timings of two kinds of Shear in the Kangxiwa strike-slip shear zone,West Kunlun,and their tectonic significance[J].Geological Bulletin of China,2007,26(10):1252-1261.
李博秦,计文化,边小卫,等. 西昆仑麻扎构造混杂岩的组成及其地质意义[J]. 现代地质,2007,21(1):78-86.
Li Boqin,Ji Wenhua,Bian xiaowei,et al. The Composition and geological significance of the Mazha tectonic Melange in west Kunlun Mountains.Geoscience[J]. Geoscience, 2007,21(1):78-86.
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