气候变化领域集成服务门户(CCPortal): Petrology of metamorphic rocks from the Atbashy complex, Southern Tien-Shan, Kyrgyzstan

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DOI	10.1016/j.gsf.2017.11.005
	Petrology of metamorphic rocks from the Atbashy complex, Southern Tien-Shan, Kyrgyzstan
	Satybaev, Maksatbek; Ding, Lin; Takasu, Akira; Bakirov, Apas; Sakiev, Kadyrbek; Cai, Fulong; Orozbaev, Rustam; Bakirov, Azamat; Baslakunov, Janybek
通讯作者	Satybaev, M (通讯作者)
发表日期	2018
ISSN	1674-9871
起始页码	1795
结束页码	1807
卷号	9 期号:6
英文摘要	The high-to ultrahigh-pressure metamorphic rocks of the Atbashy complex were petrologically investigated. The eclogites of the Choloktor Formation show a prograde evolution from epidote-blueschist facies (P = 17-21 kbar and T = 450-515 degrees C) to peak eclogite-UHP conditions (P = 26-29 kbar and T = 545-615 degrees C) with a subsequent epidote-amphibolite and greenschist facies overprint. The mica-schists of the Choloktor Formation also show a clockwise P-T path from blueschist/epidote-blueschist facies conditions through peak eclogite facies conditions (P = 21-23 kbar and T = 530-580 degrees C) to retrograde epidote-amphibolite and greenschist facies stages. A comparison of the P-T paths in the eclogites and mica-schists of Choloktor Formation reveal that they may have shared their P-T history from peak to retrograde stages. The mica-schists of the Atbashy Formation record peak metamorphism of P = 10-12 kbar and T = 515-565 degrees C, which indicates that the highest grade of regional metamorphism in the Atbashy Ridge was epidote-amphibolite facies. The newly obtained P-T conditions for the mica-schists of Choloktor Formation indicate that sheets of sedimentary rocks were brought to great depths along the subduction zone and they metamorphosed under eclogite facies HP conditions. The eclogite blocks were amalgamated with mica-schists of Choloktor Formation in the eclogite facies HP conditions and together they experienced isothermal decompression to similar to 40 km. During this path, the eclogites and mica-schists of Choloktor Formation docked with mica-schists of Atbashy Formation at 10-12 kbar and 515-565 degrees C, and from this depth (similar to 40 km) the whole sequence was exhumed together. These new results improve our understanding of high-pressure metamorphism in subduction-related accretionary prism zones and the exhumation processes of deeply-seated rocks in the Atbashy HP-UHP complex. (C) 2017, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
关键词	WESTERN TIANSHAN OROGEN HP-LT ROCKS P-T PATH NW CHINA TECTONIC IMPLICATIONS NORTH QAIDAM ECLOGITES EVOLUTION CRUST BELT
英文关键词	Eclogite; Mica-schists; P-T conditions; Atbashy; Kyrgyz Tien-Shan
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000448116200018
来源期刊	GEOSCIENCE FRONTIERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259277
推荐引用方式 GB/T 7714	Satybaev, Maksatbek,Ding, Lin,Takasu, Akira,et al. Petrology of metamorphic rocks from the Atbashy complex, Southern Tien-Shan, Kyrgyzstan[J]. 中国科学院青藏高原研究所,2018,9(6).
APA	Satybaev, Maksatbek.,Ding, Lin.,Takasu, Akira.,Bakirov, Apas.,Sakiev, Kadyrbek.,...&Baslakunov, Janybek.(2018).Petrology of metamorphic rocks from the Atbashy complex, Southern Tien-Shan, Kyrgyzstan.GEOSCIENCE FRONTIERS,9(6).
MLA	Satybaev, Maksatbek,et al."Petrology of metamorphic rocks from the Atbashy complex, Southern Tien-Shan, Kyrgyzstan".GEOSCIENCE FRONTIERS 9.6(2018).