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Precambrian Geology of ChinaNeoproterozoic Era of South China Craton

Precambrian Geology of China: Neoproterozoic Era of South China Craton [The Neoproterozoic of the Yangtze block may be subdivided into early Pt3 (1000–850 Ma), middle Pt3 (850–780 Ma), and late Pt3 (780–541 Ma). The Neoproterozoic sequence is most developed in the Jiangnan orogenic belt. The early Pt3 strata, or the lower structure sequence of Neoproterozoic, include the Sibao (Guangxi Province), Fanjingshan (Guizhou Province), Lengjiaxi (Hunan Province), Xiko (Anhui Province), Shuangxiwu (Zhejiang Province), and Pingshui (Zhejiang Province) Groups. The middle Pt3 strata, or the upper structure sequence of Neoproterozoic, include the Danzhou (Guangxi Province), Xiajiang (Guizhou Province), Banxi (Hunan Province), Likou (Anhui Province), and Heshangzhen (Zhejiang Province) Groups. The upper sequence unconformably overlies the lower sequence. The tectonic movement between the two sequences was responsible for the amalgamation of the Yangtze and Cathaysian blocks, thus formed the South China craton. But it is still controversy on the time and mechanism of the movement. The early and middle Pt3 strata are represented by the Yanbian Group, the Suxiong, and Kaijianqiao Formations at the western Yangtze block. The Huodiya and Xixiang Groups occur at the northern margin. Besides the Pt3 strata, voluminous magmatic rocks of the period are present from Panxi (Panzhihua and Xichang regions in western Sichuan Province) to Hannan region in southern Shaanxi Province, including the basic gabbros to intermediate-acid granites during 850–780 Ma ago, so forming the Panxi-Hannan magmatic belt. In the Cathaysian block, the early and middle Pt3 sequences are characterized by the Chencai and Longquan Groups, while the late Pt3 strata in the South China Craton are manifested by the Nanhua System (corresponding to the Cryogenian System) and the Sinian System (corresponding to the Ediacaran System), which are widely distributed as the cover sequence in southern China after the consolidation of the South China Craton.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Precambrian Geology of ChinaNeoproterozoic Era of South China Craton

Part of the Springer Geology Book Series
Editors: Zhai, Mingguo
Geng, Yuan-Sheng
Precambrian Geology of China — Aug 12, 2015
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39 pages

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Publisher
Springer Berlin Heidelberg
Copyright
© Springer-Verlag Berlin Heidelberg 2015
ISBN
978-3-662-47884-4
Pages
263 –301
DOI
10.1007/978-3-662-47885-1_7
Publisher site
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Abstract

[The Neoproterozoic of the Yangtze block may be subdivided into early Pt3 (1000–850 Ma), middle Pt3 (850–780 Ma), and late Pt3 (780–541 Ma). The Neoproterozoic sequence is most developed in the Jiangnan orogenic belt. The early Pt3 strata, or the lower structure sequence of Neoproterozoic, include the Sibao (Guangxi Province), Fanjingshan (Guizhou Province), Lengjiaxi (Hunan Province), Xiko (Anhui Province), Shuangxiwu (Zhejiang Province), and Pingshui (Zhejiang Province) Groups. The middle Pt3 strata, or the upper structure sequence of Neoproterozoic, include the Danzhou (Guangxi Province), Xiajiang (Guizhou Province), Banxi (Hunan Province), Likou (Anhui Province), and Heshangzhen (Zhejiang Province) Groups. The upper sequence unconformably overlies the lower sequence. The tectonic movement between the two sequences was responsible for the amalgamation of the Yangtze and Cathaysian blocks, thus formed the South China craton. But it is still controversy on the time and mechanism of the movement. The early and middle Pt3 strata are represented by the Yanbian Group, the Suxiong, and Kaijianqiao Formations at the western Yangtze block. The Huodiya and Xixiang Groups occur at the northern margin. Besides the Pt3 strata, voluminous magmatic rocks of the period are present from Panxi (Panzhihua and Xichang regions in western Sichuan Province) to Hannan region in southern Shaanxi Province, including the basic gabbros to intermediate-acid granites during 850–780 Ma ago, so forming the Panxi-Hannan magmatic belt. In the Cathaysian block, the early and middle Pt3 sequences are characterized by the Chencai and Longquan Groups, while the late Pt3 strata in the South China Craton are manifested by the Nanhua System (corresponding to the Cryogenian System) and the Sinian System (corresponding to the Ediacaran System), which are widely distributed as the cover sequence in southern China after the consolidation of the South China Craton.]

Published: Aug 12, 2015

Keywords: South China Craton; Neoproterozoic; Jiangnan (orogenic) belt; Nanhua system; Sinian system

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