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Diaoyutai Formation
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Diaoyutai Fm base reconstruction

Diaoyutai Fm

Period: 
Neoproterozoic

Age Interval: 
Late-middle Qingbaikouan (middle Tonian), Qb （23, 24）


Province: 
Liaoning, Jilin

Type Locality and Naming

Northeast Liaoning. The name Diaoyutai Fm is derived from the Diaoyutai Quartzite as named by Aoji in 1928. The naming section is located along the Xihe River and the typical section is in Dafangzi, Benxi, Liaoning Province.

[Figure: The Diaoyutai Formation in Liaodong Peninsula and sampling in the Changxing Island]

Synonym: （钓鱼台组）


Lithology and Thickness

The Diaoyutai Fm is dominated by grayish white to light brown, medium to thick-bedded quartzose sandstone. Lower part consists of grayish white quartzose sandstone, the Middle part is yellowish green to purple silty shale, and the Upper part is composed of grayish green glauconitic sandstone. Its thickness varies from 57 to 656 m.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

In Fuzhou area, the Diaoyutai Formation rests conformably or disconformably on the underlying the Yongning Gr

Upper contact

In Benxi area, it overlaps the Archean migmatitic granite or Paleoproterozoic strata, commonly with the basal conglomerate. The quartzose sandstone in upper part is so pure that it can be mined as the raw material of glass.

Regional extent

The Diaoyutai Formation is distributed in the Hunjiang River drainage area in south Jilin, the Taizi River drainage area in east Liaoning and Yingkou, Lushun, Fuxian area.


GeoJSON

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Fossils

It yields microplants: Leiopsophosphaera minor, L. densa, L. aff. effusa, Trachysphaeridium planum, T. incrassatum, T. rugosum, T. simplex, T. cultum, T. cf. laminaritum, T. stipticum, Stictosphaeridium sp., Dictyosphaera sp. etc. Macroscopic algae fossils: Chuaria circularis, Shouhsienia shouhsiensis etc.


Age 

The glauconite collected from Jilin Province is dated as 818 Ma by the K-Ar method, and another from upper part in Fuxian, Liaoning Province yield 746±7 Ma by the Ar-Ar whole-melted method. A SHRIMP U-Pb date of 1075 Ma had been found in detrital zircon within the Diaoyutai Formation (Gao Linzhi et al., 2010). Late-middle Qingbaikouan (middle Tonian) on schematic stratigraphic section

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
860.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.65

    Ending date (Ma):  
818.00

Depositional setting

The Diaoyutai Formation has inclined beddings, cross- beddings and ripple marks.


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.