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Tieshajie Formation

Tieshajie Fm

Period: 
Mesoproterozoic

Age Interval: 
Yuxian (Stenian) Yx (39)


Province: 
Jiangxi

Type Locality and Naming

NE Jiangxi-S Anhui. The Tieshajie Formation was named by the Regional Team of Geological Survey of Jiangxi Province in 1982. The typical section is located in Xuguang Town, Yiyang County, Jiangxi Province. Coordinate: 28°25´00″N；117°16´00″E

[Figure: The Tieshajie Fm. in Xuguang Town of Yiyang County of the Jiangxi Province. a-c-Sampling locality in the Tieshajie Fm; b-The section of the Tieshajie Fm]

Synonym: （铁沙街组）


Lithology and Thickness

The Tieshajie Formation is dominantly composed of light gray to greenish gray meta-siltstone and debris sandstone with carbonaceous phyllite and marble. Spilite and quartz kerato-porphyry is developing in the lower and middle parts of the formation. Its total thickness varies from 1000 to 1300 m.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

Bottom of the formation is a faulted contact

Upper contact

The top of the formation is a faulted contact. Next higher regional unit indicated on the schematic stratigraphic column is the Lengjiaxi Gr (early Qingbaikouan = early Tonian), but that is in North Hunan.

Regional extent

NE Jiangxi-S Anhui. The Tieshajie Formation is dominantly exposed in Xuguang Town of Yiyang County of the Jiangxi Province


GeoJSON

null

Fossils


Age 

SHRIMP U-Pb dates of 1132±8, 1140.5±6.5, 1143.0±8.5, and 1172.3±9.7 Ma, (Gao Linzhi et al., 2013; Zhang Heng et al., 2015). Schematic stratigraphic column shows spanning Yuxian (Stenian).

Age Span: 

    Beginning stage: 
Stenian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1,200.00

    Ending stage: 
Stenian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
1,000.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

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