The discovery of Early Cretaceous Hauterivian Ammonite Fauna in Bange area, northern Tibet and its constraints on the stratigraphic correlation of the Lower Cretaceous

WANG Dong; ZHAO Ankun; WAN Youli; SONG Chunyan; ZENG Shengqiang; LI Xueren

doi:10.12097/j.issn.1671-2552.2022.10.002

2022 Vol. 41, No. 10

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WANG Dong, ZHAO Ankun, WAN Youli, SONG Chunyan, ZENG Shengqiang, LI Xueren. The discovery of Early Cretaceous Hauterivian Ammonite Fauna in Bange area, northern Tibet and its constraints on the stratigraphic correlation of the Lower Cretaceous[J]. Geological Bulletin of China, 2022, 41(10): 1720-1727. doi: 10.12097/j.issn.1671-2552.2022.10.002

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WANG Dong, ZHAO Ankun, WAN Youli, SONG Chunyan, ZENG Shengqiang, LI Xueren. The discovery of Early Cretaceous Hauterivian Ammonite Fauna in Bange area, northern Tibet and its constraints on the stratigraphic correlation of the Lower Cretaceous[J]. Geological Bulletin of China, 2022, 41(10): 1720-1727. doi: 10.12097/j.issn.1671-2552.2022.10.002

The discovery of Early Cretaceous Hauterivian Ammonite Fauna in Bange area, northern Tibet and its constraints on the stratigraphic correlation of the Lower Cretaceous

1.
Chengdu Center, China Geological Survey, Chengdu 610081, Sichuan, China
2.
Key Laboratory for Sedimentary Basin and Oil and Gas Resources, MNR, Chengdu 610081, Sichuan, China

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Corresponding author: ZHAO Ankun, zakly@qq.com

Received Date: 12 May 2020

Revised Date: 27 July 2020

Publish Date: 15 October 2022

Abstract

Abstract

Recently, ammonites have been discovered in the Bange area of northern Tibet, which of the age is Early Cretaceous Hauterivian.The ammonite assemblages sampled in the Duoni Formation are of good preservation.Two families and one comparative species have been identified, including Polyptychitidae, Neocomitidae, Lyticoceras cf.Stevrecensis.By comparison and analysis with early studies, the ammonites have strong local attribute characteristics.Lyticoceras cf.stevrecensis is the typical species of the Early Hauterivian, which belongs to the subfamily Endemoceratinae, and can be compared with those faunas from the Northern Himalayas, Northern Pakistan and Western Mediterranean(South-East France)around the Tethys realm, even the North-Eastern Peri-Tethys.The discovery of ammonites extends the epoch of Thurmanniceras - Sarasinella to Early Hauterivian.These findings could be important foundations for the stratigraphic correlation study of the Lower Cretaceous, and for re-recognizing the sedimentary tectonic evolution in this area of Cuoqin Basin.
- ammonites /
- Hauterivian /
- Early Cretaceous /
- Bange area /
- Cuoqin basin /
- geological survey engineering /
- Tibet

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References

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