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, Chen1,2; Chen, Hongde1,3; Niu, Yaoling2,4; Chen, Anqing1; Zhang, Chenggong1; Li, Feng1,5; Xu, Shenglin1; Yang, Shuai1
2019-03-01
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Volume54Issue:2Pages:897-912
Corresponding AuthorXiong, Chen(xiongchen105@163.com) ; Chen, Hongde(chd@cdut.edu.cn)
AbstractWe 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.
KeywordCathaysia Block crustal evolution geochemistry provenance South China tectonic zircon U-Pb geochronology
DOI10.1002/gj.3253
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project[2017ZX05008005] ; Open Foundation of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation[PLC201605]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000463807400016
PublisherWILEY
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/161141
Collection中国科学院海洋研究所
Corresponding AuthorXiong, Chen; Chen, Hongde
Affiliation1.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
Recommended Citation
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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