Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks

doi:10.1002/gj.3253

IOCAS-IR

	Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
	Xiong, Chen 1,2; Chen, Hongde 1,3; Niu, Yaoling 2,4; Chen, Anqing 1; Zhang, Chenggong 1; Li, Feng 1,5; Xu, Shenglin 1; Yang, Shuai 1
	2019-03-01
发表期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
卷号	54 期号:2 页码:897-912
通讯作者	Xiong, Chen([email protected]) ; Chen, Hongde([email protected])
摘要	We report the results of a combined study of detrital zircon U-Pb geochronology and bulk-rock elemental geochemistry on late Neoproterozoic to Cambrian clastic sedimentary rocks from South Jiangxi within Cathaysia. These clastic rocks are characterized by moderate chemical index of alteration (CIA) values of 73 and high Th/U ratios (>3.8), indicating moderate weathering of the source area. The relatively high index of compositional variability (ICV=0.62-1.30) values indicates a source compositionally dominated by immature material that lacks alumina-rich minerals. Bulk-rock major and trace element systematics on discrimination diagrams are consistent with the source provenance being felsic-intermediate igneous rocks of ancient continental crust origin. The geochemistry is also consistent with the clastic sedimentary rocks being deposited in a setting at or in the vicinity of passive continental margins. Detrital zircon U-Pb ages of the clastic rocks record five major age populations: 2,614-2,376Ma (peak at ca. 2,482Ma), 1,953-1,353Ma, 1,000-900Ma (peak at ca. 958Ma), 850-730Ma (peaks at ca. 845 and 763Ma), and 685-571Ma (peak at ca. 635Ma). The age data provide a record of igneous activity in the source provenance: the 2,482Ma peak is consistent with the global Neoarchean continental crust growth; the 1,953-1,353Ma population correlates with the period of assembly and breakup of the Columbia supercontinent; the prominent peak at ca. 958Ma corresponds to a common thermal-tectonic event associated with the assembly of Rodinia, and the 850-730Ma population is consistent with the breakup of the Rodinia supercontinent. The ca. 850Ma age is indicative of initial stage of Rodinia breakup in South China. Our data also reveal a 670-530Ma population that correlates well with the Pan-African event associated with the formation of the Gondwana supercontinent, although no direct geological evidence for this event has been found within the SCB. Moreover, complex zircon morphology and comparisons of detrital zircon U-Pb age spectra in a global context suggest the late Neoproterozoic-Cambrian sedimentary rocks in the Cathaysia Block must have sourced from an exotic source with magmatic activities of late Archean, Grenvillian, and Pan-African ages, which do not outcrop in the Cathaysia Block or adjacent regions and need to be further explored.
关键词	Cathaysia Block crustal evolution geochemistry provenance South China tectonic zircon U-Pb geochronology
DOI	10.1002/gj.3253
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2017ZX05008005]###2526; Open Foundation of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation[PLC201605]###2527; National Science and Technology Major Project[2017ZX05008005]; Open Foundation of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation[PLC201605]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000463807400016
出版者	WILEY
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/161141
专题	中国科学院海洋研究所
通讯作者	Xiong, Chen; Chen, Hongde
作者单位	1.Chengdu Univ Technol, Inst Sedimentary Geol, 1 Dongsanlu, Chengdu 610059, Sichuan, Peoples R China 2.Univ Durham, Dept Earth Sci, Durham, England 3.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu, Sichuan, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Qingdao, Shandong, Peoples R China 5.SINOPEC Southwest China Oil & Gas Co, Gas Prod Plant 3, Deyang, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Chen,Chen, Hongde,Niu, Yaoling,et al. Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks[J]. GEOLOGICAL JOURNAL,2019,54(2):897-912.
APA	Xiong, Chen.,Chen, Hongde.,Niu, Yaoling.,Chen, Anqing.,Zhang, Chenggong.,...&Yang, Shuai.(2019).Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks.GEOLOGICAL JOURNAL,54(2),897-912.
MLA	Xiong, Chen,et al."Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks".GEOLOGICAL JOURNAL 54.2(2019):897-912.

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