DOI: 10.1007/s00531-016-1304-5
Scopus记录号: 2-s2.0-84959083838
论文题名: Geochemistry of fine-grained clastic rocks in the Mesoproterozoic Kawabulake Group: implications for provenance and the tectonic model of the Eastern Tianshan, Xinjiang, NW China
作者: Li D.-F. ; Chen H.-Y. ; Zhang L. ; Fralick P. ; Hollings P. ; Mi M. ; Lu W.-J. ; Han J.-S. ; Wang C.-M. ; Fang J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 1 起始页码: 115
结束页码: 129
语种: 英语
英文关键词: Eastern Tianshan
; Geochemistry
; Kawabulake Group
; Provenance
; Sedimentary rocks
; Tarim Craton
Scopus关键词: clastic rock
; fine grained sediment
; isotopic composition
; Proterozoic
; provenance
; rare earth element
; sediment chemistry
; tectonic evolution
; China
; Tarim Block
; Tien Shan
; Xinjiang Uygur
英文摘要: The Mesoproterozoic Kawabulake Group, which is unconformably overlain by the Lower Cambrian Huangshan Formation and conformably overlies the Mesoproterozoic Xingxingxia Group in the Eastern Tianshan area, NW China, is comprised mainly of siltstone, slate, sandstone and phyllite. New geochemical data for the clastic rocks from the Kawabulake Group were investigated to constrain the provenance and weathering history of the source rocks, in order to evaluate the tectonic evolution of the Eastern Tianshan area. Kawabulake Group rocks are compositionally similar to PAAS (average Post-Archean Australian Shale), indicating derivation from a felsic source that is characterized by depletion in some HFSEs such as Nb, Ta and Ti. The Chemical Index of Alteration (CIA) for the sandstone, siltstone and slate samples (CIA = 60 on average) suggests intensely weathered sources. Light REE-enrichment patterns ((La/Yb)CN = 4–20) coupled with negative Eu anomalies (Eu/Eu* between 0.44 and 0.89 with an average of 0.62) are similar to those of PAAS, consistent with cratonic sources. The major and trace element compositions imply a dominantly Precambrian felsic source region with a minor contribution from mafic materials. The Sr–Nd isotopic compositions and the ages of TDM2 (~3.4, 2.5–1.8, 1.2 and 1.0 Ga) are consistent with the evolutionary history of Kuluketage in the northern Tarim, suggesting that the Tarim Craton was the main source area for the Kawabulake Group. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959083838&doi=10.1007%2fs00531-016-1304-5&partnerID=40&md5=b60df704d4a2f44cce5282d2fcdaafa4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70083
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, P.O. Box 1131, Tianhe District, Guangzhou, Guangdong, China; Graduate University of Chinese Academy of Sciences, Beijing, China; Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada
Recommended Citation:
Li D.-F.,Chen H.-Y.,Zhang L.,et al. Geochemistry of fine-grained clastic rocks in the Mesoproterozoic Kawabulake Group: implications for provenance and the tectonic model of the Eastern Tianshan, Xinjiang, NW China[J]. International Journal of Earth Sciences,2017-01-01,106(1)