Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction?
Widely distributed Meso- to Neoproterozoic igneous rocks record the evolution of the Jiangnan orogen. We present integrated geochemical and geochronological data for basalts from the Gaoqiao area, northwestern Hunan Province. U-Pb dating of zircons indicates that the formation of Gaoqiao basalts occ...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2019
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/98790/ https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:98790 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:98790 2023-05-15T13:38:16+02:00 Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? Wan, Le Zeng, Zuoxun Asimow, Paul D. Zeng, Zhihui Peng, Lianhong Xu, Daliang Wei, Yunxu Liu, Wei Lu, Chengdong Chang, Wenqi 2019-11 https://authors.library.caltech.edu/98790/ https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677 unknown Elsevier Wan, Le and Zeng, Zuoxun and Asimow, Paul D. and Zeng, Zhihui and Peng, Lianhong and Xu, Daliang and Wei, Yunxu and Liu, Wei and Lu, Chengdong and Chang, Wenqi (2019) Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? Journal of Asian Earth Sciences, 185 . Art. No. 104039. ISSN 1367-9120. doi:10.1016/j.jseaes.2019.104039. https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677 <https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677> Article PeerReviewed 2019 ftcaltechauth 2021-11-18T18:52:26Z Widely distributed Meso- to Neoproterozoic igneous rocks record the evolution of the Jiangnan orogen. We present integrated geochemical and geochronological data for basalts from the Gaoqiao area, northwestern Hunan Province. U-Pb dating of zircons indicates that the formation of Gaoqiao basalts occurred in the Neoproterozoic, no earlier than 757 ± 16 Ma. Like the contemporaneous mafic rocks in neighboring areas, the Gaoqiao basalts show trace element characteristics suggesting derivation from a source similar to ocean-island basalts (OIBs), including strong enrichment in large-ion lithophile elements (LILEs), high-field strength elements (HFSEs) and TiO_2, and high Ti/Y ratios. Placed in a regional tectonic context, however, the Gaoqiao suite is most consistent with an intracontinental rift model and offers no support to the idea of ongoing subduction in middle-late Mid-Neoproterozoic time in the western Jiangnan orogen. Despite the coincidence between the age of this rift and the separation of East Antarctica-Australia from Laurentia, we argue that the rift recorded in the South China Block (SCB) was an independent and probably unrelated event during the break-up of the Rodinia supercontinent. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ocean Island Caltech Authors (California Institute of Technology) East Antarctica |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
description |
Widely distributed Meso- to Neoproterozoic igneous rocks record the evolution of the Jiangnan orogen. We present integrated geochemical and geochronological data for basalts from the Gaoqiao area, northwestern Hunan Province. U-Pb dating of zircons indicates that the formation of Gaoqiao basalts occurred in the Neoproterozoic, no earlier than 757 ± 16 Ma. Like the contemporaneous mafic rocks in neighboring areas, the Gaoqiao basalts show trace element characteristics suggesting derivation from a source similar to ocean-island basalts (OIBs), including strong enrichment in large-ion lithophile elements (LILEs), high-field strength elements (HFSEs) and TiO_2, and high Ti/Y ratios. Placed in a regional tectonic context, however, the Gaoqiao suite is most consistent with an intracontinental rift model and offers no support to the idea of ongoing subduction in middle-late Mid-Neoproterozoic time in the western Jiangnan orogen. Despite the coincidence between the age of this rift and the separation of East Antarctica-Australia from Laurentia, we argue that the rift recorded in the South China Block (SCB) was an independent and probably unrelated event during the break-up of the Rodinia supercontinent. |
format |
Article in Journal/Newspaper |
author |
Wan, Le Zeng, Zuoxun Asimow, Paul D. Zeng, Zhihui Peng, Lianhong Xu, Daliang Wei, Yunxu Liu, Wei Lu, Chengdong Chang, Wenqi |
spellingShingle |
Wan, Le Zeng, Zuoxun Asimow, Paul D. Zeng, Zhihui Peng, Lianhong Xu, Daliang Wei, Yunxu Liu, Wei Lu, Chengdong Chang, Wenqi Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
author_facet |
Wan, Le Zeng, Zuoxun Asimow, Paul D. Zeng, Zhihui Peng, Lianhong Xu, Daliang Wei, Yunxu Liu, Wei Lu, Chengdong Chang, Wenqi |
author_sort |
Wan, Le |
title |
Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
title_short |
Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
title_full |
Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
title_fullStr |
Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
title_full_unstemmed |
Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? |
title_sort |
mid-neoproterozoic mafic rocks in the western jiangnan orogen, south china: intracontinental rifting or subduction? |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://authors.library.caltech.edu/98790/ https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica Ocean Island |
genre_facet |
Antarc* Antarctica East Antarctica Ocean Island |
op_relation |
Wan, Le and Zeng, Zuoxun and Asimow, Paul D. and Zeng, Zhihui and Peng, Lianhong and Xu, Daliang and Wei, Yunxu and Liu, Wei and Lu, Chengdong and Chang, Wenqi (2019) Mid-Neoproterozoic mafic rocks in the western Jiangnan orogen, South China: Intracontinental rifting or subduction? Journal of Asian Earth Sciences, 185 . Art. No. 104039. ISSN 1367-9120. doi:10.1016/j.jseaes.2019.104039. https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677 <https://resolver.caltech.edu/CaltechAUTHORS:20190923-095416677> |
_version_ |
1766103275596152832 |