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Qiakmakelik Gr
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Qiakmakelik Gr base reconstruction

Qiakmakelik Gr

Period: 
Neoproterozoic

Age Interval: 
middle Nanhuan-early Sinian (Cryogenian), Nh-Z (11)


Province: 
Xinjiang

Type Locality and Naming

Tieklik region (SW Tarim Basin). The name Qiakmakelik Gr derived from the Qiakmakelik Fm named by Ma Shipeng et al. in 1979, and renamed as the Qiakmakelik Gr in 1989. The typical section is situated in Qiakmakelik valley west of the Xinjiang-Tibet Road on North Slope of Kunlun Mountain south of Yecheng County, Xinjiang Weiwuerzhu Zizhiqu (Xinjiang Uygur Autonomous Region). Coordinate: 77°02′00″E, 36°40′00″N

Synonym: （恰克马克力克群）


Lithology and Thickness

The Qiakmakelik Gr consists of two glacial units and an interglacial unit. The Bolong Fm, the lower tillite glacial unit, is composed of varvite, siliceous mudstone (lower part), diamictite and massive kame moraine, and bearing dropstones in varvite. The Kelixi Fm (inter-glacial) is feldspathic sandstone, conglomerate and quartzose sandstone, its basal part is varvite. The Yutang Fm is the upper tillite unit composed of diamictite and feldspathic sandstone. The Qiakmakelik Group has a thickness of 1702.3 m

[Figure: The Stratigraphic column of the Qiakmakelik Gr and tillite photo in fieldwork in Qiakmakelik valley]


Lithology Pattern: 
Glacial till


Relationships and Distribution

Lower contact

The Qiakmakelik Gr rests disconformably on the underlying Nanhuan Yalaguz Fm (upper formation of the Sukuluok Gr)

Upper contact

The upper part is disconformably overlain by the Sinian Kurkak Fm (overlapping).

Regional extent

Tieklik region (SW Tarim Basin). It is distributed in the north slope of west Kunlun Mountain, from the Halastan River on the west, eastward to Kurkak, Kzisuhumu then to Qiakmakelik and Kelixi valley, finally to Sumalan area.


GeoJSON

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Fossils


Age 

middle Nanhuan-early Sinian (Cryogenian-early Ediacaran). SHRIMP U-Pb date of 756±16 Ma (Gao Linzhi et al., 2013).

Age Span: 

    Beginning stage: 
Cryogenian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
720.00

    Ending stage: 
Cryogenian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
635.00

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.