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Hugejiletu Formation
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Hugejiletu Fm base reconstruction

Hugejiletu Fm

Period: 
Jurassic, Cretaceous

Age Interval: 
Tithonian-Berriasian, (Cret17d, TJ6b)


Province: 
Inner Mongolia

Type Locality and Naming

Erlian Basin. Type section at Hugejiletu close to Gegu Well no.1, in well interval of 322–676.5 m, Inner Mongolia Autonomous Region. Named by ao Minghua, Zhu Yuheng, Zheng Guoguang, Zou Weihong, Li Yanxia, 2000, Stratigraphical Sequence of Jurassic in Erlian Basin, Inner Mongolia, in Editorial Committee of Proceedings of the Third National Stratigraphical Conference of China, 2000, Proceedings of the Third National Stratigraphical Conference of China, Beijing: Geological Publishing House, 203–207.


Lithology and Thickness

The Hugejiletu Formation is mainly composed of synorogenic conglomerate, breccia, and pebbly sandstone.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

Unconformity onto Xinganling Gr (Bulagenhada Fm)

Upper contact

The Lower Aershan Fm rests on the Jurassic strata (e.g., Hugejiletu Fm or the Xinganling Gr) with an angular unconformity (named as T11 in seismic reflection sections).

Regional extent

"The Hugejiletu Formation is sporadically discovered in the Erlian Basin, and is formed due to contemporary compressional deformation during the latest Jurassic–earliest Cretaceous"


GeoJSON

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Fossils


Age 

"On the basis of zircon U-Pb ages (LA-ICP-MS; not ID-TIMS) and regional stratigraphic correlations, the ages of the Hugejiletu Formation has been refined to the Tithonian–early Valanginian (ca. 151–139 Ma)". [The summary chart in Guo et al. (2019; Fig. 14) based on their dating is 151 Ma (above 1 myr unconformity) to 139 Ma (followed by 1 myr unconformity); hence, using GTS2020, the age span implies latest Kimmeridgian to late Berriasian.]

Age Span: 

    Beginning stage: 
Kimmeridgian

    Fraction up in beginning stage: 
0.7

    Beginning date (Ma): 
150.90

    Ending stage: 
Berriasian

    Fraction up in the ending stage: 
0.75

    Ending date (Ma):  
139.05

Depositional setting

Alluvian fan


Depositional pattern:  


Additional Information


Compiler:  

Guo, Z.X. et al. (2019, Early Cretaceous tectonostratigraphic evolution of the Erlian Basin, NE China, Marine and Petroleumm Geology, 110: 539-564). Additional information from Geological Formation Names of China (1866-2000), Springer.