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Precambrian Geology of ChinaMesoproterozoic Era of South China Craton

Precambrian Geology of China: Mesoproterozoic Era of South China Craton [The Mesoproterozoic terranes are mainly distributed at the northern and western margin of the Yangtze Block and can be discerned into 2 major stages, early Pt2 (1.8–1.5 Ga) and late Pt2 (1.5–1.0 Ga), according to the formation time. The sequence of early Pt2 stage is present as the Dahongshan, Dongchuan, and Hekou Groups at the southwestern margin of the Yangtze Block, consisting of sandstone, siltstone, slate, phyllite, dolomitic marble, and marble, with volcanic intercalation in which usually produce the Fe–Cu deposits. In addition, some magmatic rocks of early Pt2 stage occur as stocks and dykes intruding the early Pt2 sequence in the area. The magmas can be subdivided into two events: the early ca 1.7 Ga dominated by dolerites and the late ca 1.5 Ga gabbro stocks and dykes. The sequence of late Pt2 stage crop out as the Kunyang, Huili Groups at the southwestern margin and the Shennongjia Group at the northern margin of the Yangtze Block. Magmatic events are obviously manifested in the period (1.1–1.0 Ga) in the block, but magmatic rocks (including the eruptives and intrusives) in different areas vary in formation setting according to their association and geochemical features. While in the Cathaysian Block and Jiangnan orogenic belt, the Mesoproterozoic terranes are only rarely exposed, such as the 1.5–1.4 Ga Baoban Group (including part of the Shilu Group) in Hainan Island of the Cathaysian Block, and the Tianli schist and Tieshajie Formation of Late Mesoproterozoic in the eastern segment of the Jiangnan belt.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Precambrian Geology of ChinaMesoproterozoic 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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20 pages

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Publisher
Springer Berlin Heidelberg
Copyright
© Springer-Verlag Berlin Heidelberg 2015
ISBN
978-3-662-47884-4
Pages
241 –261
DOI
10.1007/978-3-662-47885-1_6
Publisher site
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Abstract

[The Mesoproterozoic terranes are mainly distributed at the northern and western margin of the Yangtze Block and can be discerned into 2 major stages, early Pt2 (1.8–1.5 Ga) and late Pt2 (1.5–1.0 Ga), according to the formation time. The sequence of early Pt2 stage is present as the Dahongshan, Dongchuan, and Hekou Groups at the southwestern margin of the Yangtze Block, consisting of sandstone, siltstone, slate, phyllite, dolomitic marble, and marble, with volcanic intercalation in which usually produce the Fe–Cu deposits. In addition, some magmatic rocks of early Pt2 stage occur as stocks and dykes intruding the early Pt2 sequence in the area. The magmas can be subdivided into two events: the early ca 1.7 Ga dominated by dolerites and the late ca 1.5 Ga gabbro stocks and dykes. The sequence of late Pt2 stage crop out as the Kunyang, Huili Groups at the southwestern margin and the Shennongjia Group at the northern margin of the Yangtze Block. Magmatic events are obviously manifested in the period (1.1–1.0 Ga) in the block, but magmatic rocks (including the eruptives and intrusives) in different areas vary in formation setting according to their association and geochemical features. While in the Cathaysian Block and Jiangnan orogenic belt, the Mesoproterozoic terranes are only rarely exposed, such as the 1.5–1.4 Ga Baoban Group (including part of the Shilu Group) in Hainan Island of the Cathaysian Block, and the Tianli schist and Tieshajie Formation of Late Mesoproterozoic in the eastern segment of the Jiangnan belt.]

Published: Aug 12, 2015

Keywords: Mesoproterozoic; Dahongshan Group; Hekou Group; Dongchuan Group; Kunyang Group; Huili Group; Shennongjia Group; 1.7 and 1.5 Ga magmatic event; 1.0 Ga magmatic event

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