气候变化领域集成服务门户(CCPortal): Indo-Burma passive amalgamation along the Kaladan Fault: Insights from zircon provenance in the Chittagong-Tripura Fold Belt (Bangladesh)

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DOI	10.1130/B35429.1
	Indo-Burma passive amalgamation along the Kaladan Fault: Insights from zircon provenance in the Chittagong-Tripura Fold Belt (Bangladesh)
	Yang L.; Xiao W.; Rahman M.J.J.; Windley B.F.; Schulmann K.; Ao S.; Zhang J.; Chen Z.; Hossain M.S.; Dong Y.
发表日期	2020
ISSN	167606
起始页码	1953
结束页码	1968
卷号	132 期号:2021-09-10
英文摘要	A clear insight of the Indo-Burma amalgamation is required for an understanding of the complex processes of the Indo-Asian collision. Where and when the northeastern part of the Indian subcontinent amalgamated with the Burma plate has not yet been well defined. In order to better understand the tectonic affiliations and evolution of the Indo-Burma Ranges (IBR), we report new detrital zircon U-Pb and Hf isotope data of nine sandstone/siltstone samples (late Miocene-Pliocene) from the Chittagong-Tripura Fold Belt, Bangladesh, which is in the Neogene belt of the IBR. Our results show that the zircon ages of all nine samples have three peaks at <200 Ma, ca. 500 Ma, and 800-1000 Ma. The percentage of young (<200 Ma) zircons increase from the Boka Bil Formation (6.9% to 15.2%) to the Tipam Formation (20.3% to 27.6%). The εHf(t) of most young zircons from the Boka Bil Formation suggest derivation from the Gangdese arc, whereas those from the Tipam Formation show an affinity with the Burma magmatic arc. Therefore, we suggest that the increase of young zircons in the Tipam Formation came from the Burma plate. Comparing provenances of the Paleogene and Neogene belts of the IBR, we suggest that they belong to the Burma plate and Indian subcontinent, respectively, and that the Kaladan Fault, separating these two belts, is the suture between the Indian and Burma terranes. The time of amalgamation is constrained by the ca. 2.5-3.9 Ma boundary between the Boka Bil and Tipam formations, and the eastern Indian promontory likely collided with the Burma plate ca. 11-12 Ma. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184732
作者单位	State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Science, Chinese Academy of Sciences, Beijing, 100101, China; Department of Geological Sciences, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh; Department of Geology, University of Leicester, Leicester, LE1 7RH, United Kingdom; Institut de Physique du Globe de Strasbourg, UMR 7516, University of Strasbourg, École et Observatoire des Sciences de la Terre, Centre National de la Recherche Scientifique, Strasbourg, France
推荐引用方式 GB/T 7714	Yang L.,Xiao W.,Rahman M.J.J.,et al. Indo-Burma passive amalgamation along the Kaladan Fault: Insights from zircon provenance in the Chittagong-Tripura Fold Belt (Bangladesh)[J],2020,132(2021-09-10).
APA	Yang L..,Xiao W..,Rahman M.J.J..,Windley B.F..,Schulmann K..,...&Dong Y..(2020).Indo-Burma passive amalgamation along the Kaladan Fault: Insights from zircon provenance in the Chittagong-Tripura Fold Belt (Bangladesh).Bulletin of the Geological Society of America,132(2021-09-10).
MLA	Yang L.,et al."Indo-Burma passive amalgamation along the Kaladan Fault: Insights from zircon provenance in the Chittagong-Tripura Fold Belt (Bangladesh)".Bulletin of the Geological Society of America 132.2021-09-10(2020).