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

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)...

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Published in:Geological Journal
Main Authors: Xiong, Chen, Chen, Hongde, Niu, Yaoling, Chen, Anqing, Zhang, Chenggong, Li, Feng, Xu, Shenglin, Yang, Shuai
Format: Report
Language:English
Published: WILEY 2019
Subjects:
Online Access:http://ir.qdio.ac.cn/handle/337002/161139
https://doi.org/10.1002/gj.3253
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spelling ftchinacasciocas:oai:ir.qdio.ac.cn:337002/161139 2023-05-15T14:03:36+02:00 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 Chen, Hongde Niu, Yaoling Chen, Anqing Zhang, Chenggong Li, Feng Xu, Shenglin Yang, Shuai 2019-03-01 http://ir.qdio.ac.cn/handle/337002/161139 https://doi.org/10.1002/gj.3253 英语 eng WILEY GEOLOGICAL JOURNAL http://ir.qdio.ac.cn/handle/337002/161139 doi:10.1002/gj.3253 Cathaysia Block crustal evolution geochemistry provenance South China tectonic zircon U-Pb geochronology Geology Geosciences Multidisciplinary EARLY PALEOZOIC TECTONISM LU-HF ISOTOPES EAST ANTARCTICA OROGENIC BELT YANGTZE BLOCK METASEDIMENTARY ROCKS CAMBRIAN SANDSTONES CONTINENTAL-CRUST SEDIMENTARY-ROCKS PLATE-TECTONICS 期刊论文 2019 ftchinacasciocas https://doi.org/10.1002/gj.3253 2022-06-27T05:40:38Z 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 ... Report Antarc* Antarctica East Antarctica Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR East Antarctica Geological Journal 54 2 897 912
institution Open Polar
collection Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
op_collection_id ftchinacasciocas
language English
topic Cathaysia Block
crustal evolution
geochemistry
provenance
South China
tectonic
zircon U-Pb geochronology
Geology
Geosciences
Multidisciplinary
EARLY PALEOZOIC TECTONISM
LU-HF ISOTOPES
EAST ANTARCTICA
OROGENIC BELT
YANGTZE BLOCK
METASEDIMENTARY ROCKS
CAMBRIAN SANDSTONES
CONTINENTAL-CRUST
SEDIMENTARY-ROCKS
PLATE-TECTONICS
spellingShingle Cathaysia Block
crustal evolution
geochemistry
provenance
South China
tectonic
zircon U-Pb geochronology
Geology
Geosciences
Multidisciplinary
EARLY PALEOZOIC TECTONISM
LU-HF ISOTOPES
EAST ANTARCTICA
OROGENIC BELT
YANGTZE BLOCK
METASEDIMENTARY ROCKS
CAMBRIAN SANDSTONES
CONTINENTAL-CRUST
SEDIMENTARY-ROCKS
PLATE-TECTONICS
Xiong, Chen
Chen, Hongde
Niu, Yaoling
Chen, Anqing
Zhang, Chenggong
Li, Feng
Xu, Shenglin
Yang, Shuai
Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
topic_facet Cathaysia Block
crustal evolution
geochemistry
provenance
South China
tectonic
zircon U-Pb geochronology
Geology
Geosciences
Multidisciplinary
EARLY PALEOZOIC TECTONISM
LU-HF ISOTOPES
EAST ANTARCTICA
OROGENIC BELT
YANGTZE BLOCK
METASEDIMENTARY ROCKS
CAMBRIAN SANDSTONES
CONTINENTAL-CRUST
SEDIMENTARY-ROCKS
PLATE-TECTONICS
description 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 ...
format Report
author Xiong, Chen
Chen, Hongde
Niu, Yaoling
Chen, Anqing
Zhang, Chenggong
Li, Feng
Xu, Shenglin
Yang, Shuai
author_facet Xiong, Chen
Chen, Hongde
Niu, Yaoling
Chen, Anqing
Zhang, Chenggong
Li, Feng
Xu, Shenglin
Yang, Shuai
author_sort Xiong, Chen
title Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
title_short Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
title_full Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
title_fullStr Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
title_full_unstemmed Provenance, depositional setting, and crustal evolution of the Cathaysia Block, South China: Insights from detrital zircon U-Pb geochronology and geochemistry of clastic rocks
title_sort provenance, depositional setting, and crustal evolution of the cathaysia block, south china: insights from detrital zircon u-pb geochronology and geochemistry of clastic rocks
publisher WILEY
publishDate 2019
url http://ir.qdio.ac.cn/handle/337002/161139
https://doi.org/10.1002/gj.3253
geographic East Antarctica
geographic_facet East Antarctica
genre Antarc*
Antarctica
East Antarctica
genre_facet Antarc*
Antarctica
East Antarctica
op_relation GEOLOGICAL JOURNAL
http://ir.qdio.ac.cn/handle/337002/161139
doi:10.1002/gj.3253
op_doi https://doi.org/10.1002/gj.3253
container_title Geological Journal
container_volume 54
container_issue 2
container_start_page 897
op_container_end_page 912
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