Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block
This work was supported by the National Natural Science Foundation of China (Grant No. 41772106 and 41472086) and by the Australian Research Council (Grant FL160100168). Neoproterozoic paleogeography of the South China is dominated by the formation of Rodinia, its break-up, and the subsequent amalga...
Published in: | Precambrian Research |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/10023/18052 https://doi.org/10.1016/j.precamres.2018.07.003 |
id |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18052 |
---|---|
record_format |
openpolar |
spelling |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18052 2024-06-23T07:46:37+00:00 Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block Qi, Liang Xu, Yajun Cawood, Peter A. Du, Yuansheng University of St Andrews. School of Earth & Environmental Sciences 2019-07-07 32486515 application/pdf https://hdl.handle.net/10023/18052 https://doi.org/10.1016/j.precamres.2018.07.003 eng eng Precambrian Research 254549176 a0f7189d-974d-4d35-bc01-eca70681f483 85049756980 000440959700024 Qi , L , Xu , Y , Cawood , P A & Du , Y 2018 , ' Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block ' , Precambrian Research , vol. In press . https://doi.org/10.1016/j.precamres.2018.07.003 0301-9268 RIS: urn:2EE2BC10C798DFE2E279C7014435C0C2 https://hdl.handle.net/10023/18052 doi:10.1016/j.precamres.2018.07.003 South China Neoproterozoic Rodinia Gondwana Detrital zircon North India GE Environmental Sciences QE Geology NDAS GE QE Journal article 2019 ftstandrewserep https://doi.org/10.1016/j.precamres.2018.07.003 2024-06-11T23:58:14Z This work was supported by the National Natural Science Foundation of China (Grant No. 41772106 and 41472086) and by the Australian Research Council (Grant FL160100168). Neoproterozoic paleogeography of the South China is dominated by the formation of Rodinia, its break-up, and the subsequent amalgamation of Gondwana. Two negative excursions of the chemical index of alteration (CIA) and the chemical index of weathering (CIW) recorded in the Cryogenian to Ediacaran sedimentary rocks of the Cathaysia Block, South China, indicate two cooling events. In combination with available age constraints, this data suggests correlation with the global Marinoan (ca. 650-635 Ma) and Gaskiers (ca. 579 Ma) glaciations. U-Pb ages of detrital zircons from the Cryogenian to lower Ediacaran strata define two distinctive age peaks at 1056 Ma and 998 Ma, whereas the upper Ediacaran strata show only one age peak at 957 Ma. These data demonstrate Neoproterozoic sedimentary rocks in the Cathaysia Block were derived from a source external to the craton. The predominant late Mesoproterozoic to early Neoproterozoic (1140-870 Ma) detrital zircons were most likely derived from a source dominated by North India and East Antarctica with limited input from Western Australia. Furthermore, εHf(t) values of detrital zircons are similar to the coeval detrital zircons from Rayner-Eastern Ghats. The detrital record of the late Cryogenian and Ediacaran strata in the Cathaysia Block suggests that the South China Block was connected to the northern margin of India during the dispersal of Rodinia and the assembly of East Gondwana. Detrital zircons from Cryogenian strata overlying the Jiangnan Orogen are largely in the range 900-700 Ma with scattered Archean and Paleoproterozoic grains. These ages are consistent with derivation from local sources within South China. The timing of accumulation of these units, after collisional assembly of South China, likely accounts for their more restricted provenance with collision generated relief providing both a ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica University of St Andrews: Digital Research Repository East Antarctica Rayner ENVELOPE(-45.166,-45.166,-60.650,-60.650) Precambrian Research 314 452 467 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
South China Neoproterozoic Rodinia Gondwana Detrital zircon North India GE Environmental Sciences QE Geology NDAS GE QE |
spellingShingle |
South China Neoproterozoic Rodinia Gondwana Detrital zircon North India GE Environmental Sciences QE Geology NDAS GE QE Qi, Liang Xu, Yajun Cawood, Peter A. Du, Yuansheng Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
topic_facet |
South China Neoproterozoic Rodinia Gondwana Detrital zircon North India GE Environmental Sciences QE Geology NDAS GE QE |
description |
This work was supported by the National Natural Science Foundation of China (Grant No. 41772106 and 41472086) and by the Australian Research Council (Grant FL160100168). Neoproterozoic paleogeography of the South China is dominated by the formation of Rodinia, its break-up, and the subsequent amalgamation of Gondwana. Two negative excursions of the chemical index of alteration (CIA) and the chemical index of weathering (CIW) recorded in the Cryogenian to Ediacaran sedimentary rocks of the Cathaysia Block, South China, indicate two cooling events. In combination with available age constraints, this data suggests correlation with the global Marinoan (ca. 650-635 Ma) and Gaskiers (ca. 579 Ma) glaciations. U-Pb ages of detrital zircons from the Cryogenian to lower Ediacaran strata define two distinctive age peaks at 1056 Ma and 998 Ma, whereas the upper Ediacaran strata show only one age peak at 957 Ma. These data demonstrate Neoproterozoic sedimentary rocks in the Cathaysia Block were derived from a source external to the craton. The predominant late Mesoproterozoic to early Neoproterozoic (1140-870 Ma) detrital zircons were most likely derived from a source dominated by North India and East Antarctica with limited input from Western Australia. Furthermore, εHf(t) values of detrital zircons are similar to the coeval detrital zircons from Rayner-Eastern Ghats. The detrital record of the late Cryogenian and Ediacaran strata in the Cathaysia Block suggests that the South China Block was connected to the northern margin of India during the dispersal of Rodinia and the assembly of East Gondwana. Detrital zircons from Cryogenian strata overlying the Jiangnan Orogen are largely in the range 900-700 Ma with scattered Archean and Paleoproterozoic grains. These ages are consistent with derivation from local sources within South China. The timing of accumulation of these units, after collisional assembly of South China, likely accounts for their more restricted provenance with collision generated relief providing both a ... |
author2 |
University of St Andrews. School of Earth & Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Qi, Liang Xu, Yajun Cawood, Peter A. Du, Yuansheng |
author_facet |
Qi, Liang Xu, Yajun Cawood, Peter A. Du, Yuansheng |
author_sort |
Qi, Liang |
title |
Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
title_short |
Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
title_full |
Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
title_fullStr |
Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
title_full_unstemmed |
Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block |
title_sort |
reconstructing cryogenian to ediacaran successions and paleogeography of the south china block |
publishDate |
2019 |
url |
https://hdl.handle.net/10023/18052 https://doi.org/10.1016/j.precamres.2018.07.003 |
long_lat |
ENVELOPE(-45.166,-45.166,-60.650,-60.650) |
geographic |
East Antarctica Rayner |
geographic_facet |
East Antarctica Rayner |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_relation |
Precambrian Research 254549176 a0f7189d-974d-4d35-bc01-eca70681f483 85049756980 000440959700024 Qi , L , Xu , Y , Cawood , P A & Du , Y 2018 , ' Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block ' , Precambrian Research , vol. In press . https://doi.org/10.1016/j.precamres.2018.07.003 0301-9268 RIS: urn:2EE2BC10C798DFE2E279C7014435C0C2 https://hdl.handle.net/10023/18052 doi:10.1016/j.precamres.2018.07.003 |
op_doi |
https://doi.org/10.1016/j.precamres.2018.07.003 |
container_title |
Precambrian Research |
container_volume |
314 |
container_start_page |
452 |
op_container_end_page |
467 |
_version_ |
1802647064047255552 |