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Shangshu Formation
Click to display on map of the Ancient World at:
Shangshu Fm base reconstruction

Shangshu Fm

Period: 
Neoproterozoic

Age Interval: 
latest Qingbaikouan (late Tonian), Qb (61)


Province: 
Zhejiang

Type Locality and Naming

North Zhejiang. The Shangshu Fm was named by the Zhejiang Party of Regional Geological Survey in 1970 (Guidebook of 1: 200 000 Scale Geological Map of Quzhou Sheet). The typical section is situated in Shangshu village (now Shangzhi village) in Quzhou City and the reference section is in Fenghuangwu in Xiaoshan County, Zhejiang Province.

Synonym: （上墅组）


Lithology and Thickness

The Shangshu Fm (in the reference section of Fenghuangwu) is a suite of red purple, grayish purple and gray basic, intermediate to acidic lava intercalated with minor pyroclastic rock and sedimentary rock. Lower part is dominated by greenish gray and purple gray andesitic basalt-porphyrite and tuff. Middle part consists of greenish gray andesite interbedded with red rhyolite. Upper part is red purple rhyolite porphyry. From west to east, the thickness varies from 400 m to 1400 m and the degree of metamorphism somewhat decreases.


Lithology Pattern: 
Lava


Relationships and Distribution

Lower contact

It rests conformably on the underlying Hongchicun Fm

Upper contact

It underlies conformably the overlying Nanhuan Xiuning Fm. [However

Regional extent

North Zhejiang..


GeoJSON

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Fossils


Age 

A Rb-Sr age date in the upper part is 817±87 Ma and a SHRIMP U-Pb date is 766 Ma (Gao Linzhi et al., 2008). latest Qingbaikouan (late Tonian) on schematic stratigraphic section

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.7

    Beginning date (Ma): 
804.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.8

    Ending date (Ma):  
776.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracts from The Neoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.