Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia
Early Cambrian and Mid–Late Neoproterozoic volcanic rocks in China are widespread on several Precambrian continental blocks, which had aggregated to form part of the Rodinia supercontinent by ca. 900 Ma. On the basis of petrogeochemical data, the basic lavas can be classified into two major magma ty...
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ftdoajarticles:oai:doaj.org/article:8c42fca126064f43bbb71989643db9fe 2023-10-01T03:52:06+02:00 Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia Linqi Xia Zuchun Xia Xueyi Xu Xiangmin Li Zhongping Ma 2012-07-01T00:00:00Z https://doi.org/10.1016/j.gsf.2011.10.004 https://doaj.org/article/8c42fca126064f43bbb71989643db9fe EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S1674987111001058 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2011.10.004 https://doaj.org/article/8c42fca126064f43bbb71989643db9fe Geoscience Frontiers, Vol 3, Iss 4, Pp 375-399 (2012) Neoproterozoic Bimodal volcanism Continental rift Mantle plume Rodinia supercontinent China Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.1016/j.gsf.2011.10.004 2023-09-03T00:43:16Z Early Cambrian and Mid–Late Neoproterozoic volcanic rocks in China are widespread on several Precambrian continental blocks, which had aggregated to form part of the Rodinia supercontinent by ca. 900 Ma. On the basis of petrogeochemical data, the basic lavas can be classified into two major magma types: HT (Ti/Y > 500) and LT (Ti/Y < 500) that can be further divided into HT1 (Nb/La > 0.85) and HT2 (Nb/La ≤ 0.85), and LT1 (Nb/La > 0.85) and LT2 (Nb/La ≤ 0.85) subtypes, respectively. The geochemical variation of the HT2 and LT2 lavas can be accounted for by lithospheric contamination of asthenosphere- (or plume-) derived magmas, whereas the parental magmas of the HT1 and LT1 lavas did not undergo, during their ascent, pronounced lithospheric contamination. These volcanics exhibit at least three characteristics: (1) most have a compositional bimodality; (2) they were formed in an intracontinental rift setting; and (3) they are genetically linked with mantle plumes or a mantle surperplume. This rift-related volcanism at end of the Mid–Neoproterozoic and Early Cambrian coincided temporally with the separation between Australia–East Antarctica, South China and Laurentia and between Australia and Tarim, respectively. The Mid–Late Neoproterozoic volcanism in China is the geologic record of the rifting and break-up of the supercontinent Rodinia. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Directory of Open Access Journals: DOAJ Articles East Antarctica Geoscience Frontiers 3 4 375 399 |
institution |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Neoproterozoic Bimodal volcanism Continental rift Mantle plume Rodinia supercontinent China Geology QE1-996.5 |
spellingShingle |
Neoproterozoic Bimodal volcanism Continental rift Mantle plume Rodinia supercontinent China Geology QE1-996.5 Linqi Xia Zuchun Xia Xueyi Xu Xiangmin Li Zhongping Ma Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
topic_facet |
Neoproterozoic Bimodal volcanism Continental rift Mantle plume Rodinia supercontinent China Geology QE1-996.5 |
description |
Early Cambrian and Mid–Late Neoproterozoic volcanic rocks in China are widespread on several Precambrian continental blocks, which had aggregated to form part of the Rodinia supercontinent by ca. 900 Ma. On the basis of petrogeochemical data, the basic lavas can be classified into two major magma types: HT (Ti/Y > 500) and LT (Ti/Y < 500) that can be further divided into HT1 (Nb/La > 0.85) and HT2 (Nb/La ≤ 0.85), and LT1 (Nb/La > 0.85) and LT2 (Nb/La ≤ 0.85) subtypes, respectively. The geochemical variation of the HT2 and LT2 lavas can be accounted for by lithospheric contamination of asthenosphere- (or plume-) derived magmas, whereas the parental magmas of the HT1 and LT1 lavas did not undergo, during their ascent, pronounced lithospheric contamination. These volcanics exhibit at least three characteristics: (1) most have a compositional bimodality; (2) they were formed in an intracontinental rift setting; and (3) they are genetically linked with mantle plumes or a mantle surperplume. This rift-related volcanism at end of the Mid–Neoproterozoic and Early Cambrian coincided temporally with the separation between Australia–East Antarctica, South China and Laurentia and between Australia and Tarim, respectively. The Mid–Late Neoproterozoic volcanism in China is the geologic record of the rifting and break-up of the supercontinent Rodinia. |
format |
Article in Journal/Newspaper |
author |
Linqi Xia Zuchun Xia Xueyi Xu Xiangmin Li Zhongping Ma |
author_facet |
Linqi Xia Zuchun Xia Xueyi Xu Xiangmin Li Zhongping Ma |
author_sort |
Linqi Xia |
title |
Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
title_short |
Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
title_full |
Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
title_fullStr |
Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
title_full_unstemmed |
Mid–Late Neoproterozoic rift-related volcanic rocks in China: Geological records of rifting and break-up of Rodinia |
title_sort |
mid–late neoproterozoic rift-related volcanic rocks in china: geological records of rifting and break-up of rodinia |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://doi.org/10.1016/j.gsf.2011.10.004 https://doaj.org/article/8c42fca126064f43bbb71989643db9fe |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Geoscience Frontiers, Vol 3, Iss 4, Pp 375-399 (2012) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674987111001058 https://doaj.org/toc/1674-9871 1674-9871 doi:10.1016/j.gsf.2011.10.004 https://doaj.org/article/8c42fca126064f43bbb71989643db9fe |
op_doi |
https://doi.org/10.1016/j.gsf.2011.10.004 |
container_title |
Geoscience Frontiers |
container_volume |
3 |
container_issue |
4 |
container_start_page |
375 |
op_container_end_page |
399 |
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1778517673633644544 |