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Xiawuzhai Formation
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Xiawuzhai Fm base reconstruction

Xiawuzhai Fm

Period: 
Neoproterozoic

Age Interval: 
late-Middle Qingbaikouan (middle Tonian)? Qb (62)


Province: 
Zhejiang

Type Locality and Naming

North-central Zhejiang. Naming and Type Locality: The Xiawuzhai Fm was named by Kong Xiangsheng et al. in 1989 and published in 1995. The naming section is situated in Xiawuzhai, Xiaosi, Zhuji City, Zhejiang Province. Upper-middle formation of the Chencai Gr.

Synonym: （下屋宅组）


Lithology and Thickness

The formation is composed of grey-black, grey augite amphibolite, hornblende leptite, biotite-monzo-leptite, plagioclase leptite and hornblende plagioclase leptite, accompanied with laminated and striated migmatite. Its lower part is dominated by different kinds of leptite and the upper part is dominated by hornblendite. The thickness varies in the range from 439 m to 690 m.


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

It is in conformable contact both with the underlying Xiahetu Fm

Upper contact

It is in conformable contact both with the overlying Xu'an Fm

Regional extent

The formation is mainly distributed in Zhuji, Longshan, Yuyao and Shangyu counties of Zhejiang Province.


GeoJSON

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Fossils


Age 

SHRIMP U-Pb dates of 848±10 Ma are 845±9 Ma are found in the formation (Gao Linzhi et al., 2014). late-Middle Qingbaikouan (middle Tonian)?

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.4

    Beginning date (Ma): 
888.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
860.00

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.