A discussion on Jurassic and Cretaceous boundary based on the SHRIMP zircon U-Pb dating of Mesozoic holitype section in Luanping basin

GAO Linzhi; WANG Yishi; ZHANG Heng

2018 Vol. 37, No. 7

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Article navigation > Geological Bulletin of China > 2018 > 37(7): 1186-1192

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GAO Linzhi, WANG Yishi, ZHANG Heng. A discussion on Jurassic and Cretaceous boundary based on the SHRIMP zircon U-Pb dating of Mesozoic holitype section in Luanping basin[J]. Geological Bulletin of China, 2018, 37(7): 1186-1192.

Citation:

GAO Linzhi, WANG Yishi, ZHANG Heng. A discussion on Jurassic and Cretaceous boundary based on the SHRIMP zircon U-Pb dating of Mesozoic holitype section in Luanping basin[J]. Geological Bulletin of China, 2018, 37(7): 1186-1192.

A discussion on Jurassic and Cretaceous boundary based on the SHRIMP zircon U-Pb dating of Mesozoic holitype section in Luanping basin

1.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
2.
Beijing No.8 High School, Beijing 100033, China

Received Date: 26 April 2018

Revised Date: 29 May 2018

Publish Date: 25 July 2018

Abstract

Abstract

This paper is the record of a field investigation of Mesozoic strata in Luanping County, Hebei Province, which was organized by the Commission on Stratigraphy of China. A tuff sample was collected in the Dabeigou Formation at the top of the Jurassic strata. According to the chronostratigraphic dating, the authors think over the terrestrial Jurassic/Cretaceous boundary based on the tuff zircon dating. The terrestrial Jurassic and Cretaceous strata are well developed in Luanping County, Hebei Province. Various terrestrial fossils are very abundant with a large amount of tuffeous rocks. It is an ideal province for the study of Jurassic/Cretaceous boundary and the Dabeigou Formation and Dadianzi Formation based comprehensively on lithogical stratigraphy, biostratigraphy, chronostratigraphy and magnetostratigraphy. According to the chronostratigraphy, the boundary age of Jurassic/Cretaceous tends to favor the era of 130Ma. This paper reports a SHRIMP U-Pb age of 129.9±1.1Ma for tuff of the holitype section of the Dabeigou Formation from Yushuxia Village, Luanping County.
- Jurassic/Cretaceous /
- terrestrial strata /
- isotopic dating /
- Luanping County, Hebei Province

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References

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