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Huashan Formation

Huashan Fm

Period: 
Mesoproterozoic

Age Interval: 
Changchengian (Statherian) Ch (18)


Province: 
Jilin, Liaoning, North Korea

Type Locality and Naming

Southernmost Jilin. The Huashan Fm was named by the Southern Jilin Party of Regional Geological Survey, Changchun College of Geological Exploration in 1960. The type section is at Huashan Township (Laosandui-Huashan-Linjiang), Hunjiang City, Jilin Province. Is part of the Laoling Gr. Middle (3 of 5) formation in Laoling Gr.

Synonym: （花山组）


Lithology and Thickness

In the type section: Lower part of the formation consists of mica-quartz schist, two-mica quartz schist, intercalated with staurolite two-mica schist and four beds of calcareous marble. Middle part is composed of zoisitic two-mica schist, two-mica quartz schist, magnetitic-two-mica schist, intercalated with three beds of calcareous marble. Upper part is dominated by staurolite two-mica schist with five beds of calcareous marble. It is distinguished from the other formations within the Laoling Gr by the calcareous marbles. The marble beds gradually decrease toward west, for example in Tonghua County it consists almost wholly of schist without any marble layers. The Huashan Fm, 4675 m thick.


Lithology Pattern: 
Continental marl


Relationships and Distribution

Lower contact

It is in conformable contact with underlying Zhenzhumen Fm.

Upper contact

It is in conformable contact with the overlying Linjiang Fm.

Regional extent

Southernmost Jilin. In its distribution area, it stretches in northeast and southwest direction with the center at Huashan Township.


GeoJSON

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Fossils


Age 

SHRIMP U-Pb 824±9 Ma (Deng et al., 2013). But Schematic stratigraphic section places as late Changchengian (late Statherian).

Age Span: 

    Beginning stage: 
Statherian

    Fraction up in beginning stage: 
0.65

    Beginning date (Ma): 
1,670.00

    Ending stage: 
Statherian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
1,600.00

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.