LA-ICP-MS U-Pb GEOCHRONOLOGY OF THE SEDIMENTARY ROCK AND VOLCANO ROCK ZIRCONS FROM THE EMOERHE GROUP IN THE MOHE BASIN AND ITS GEOLOGICAL SIGNIFICANCE

ZHAO Li-guo; YANG Xiao-ping; ZHAO Xing-min; LIU Yuan; ZHANG Wei-long

Volume 20 Issue 3

Sep. 2014

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Article Navigation > Journal of Geomechanics > 2014 > 20(3): 285-291

ZHAO Li-guo, YANG Xiao-ping, ZHAO Xing-min, et al., 2014. LA-ICP-MS U-Pb GEOCHRONOLOGY OF THE SEDIMENTARY ROCK AND VOLCANO ROCK ZIRCONS FROM THE EMOERHE GROUP IN THE MOHE BASIN AND ITS GEOLOGICAL SIGNIFICANCE. Journal of Geomechanics, 20 (3): 285-291.

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LA-ICP-MS U-Pb GEOCHRONOLOGY OF THE SEDIMENTARY ROCK AND VOLCANO ROCK ZIRCONS FROM THE EMOERHE GROUP IN THE MOHE BASIN AND ITS GEOLOGICAL SIGNIFICANCE

1.
Qiqihar Branch, Research Institute of Regional Geological Survey of Heilongjiang, Harbin 150036, China
2.
Oil and Gas Survey, CGS, Beijing 100029, China

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Received: 2014-04-10
Published: 2014-09-01

Abstract

Abstract

Emoerhe Group in the Mohe Basin of northwestern Daxing'anling consists of Xiufeng Formation, Ershierzhan Formation, and Kaikukang Formation. Currently on Emoerhe Group's Formation age is still controversial. Study on the Zircon LA-ICP-MS U-Pb age of the Xiufeng Formation pebbly coarse sandstone sedimentary rock and interlayer of Rhyolitic tuff in Ershierzhan Formation clastic rock show that Xiufeng pebbly sandstone coarse detrital zircon U-Pb ages varied from 2195 Ma to 163 Ma. This alludes that the source region is Proterozoic-Middle Jurassic basement. The aging data of the basement rocks and the periphery of the basin are coincide. Detrital zircons in the five youngest zircon ²⁰⁶Pb/²³⁸U weighted mean age of (167±2) Ma. It reflects the sedimentary basin limit of early Late Jurassic. Ershierzhan Rhyolitic tuff magmatic zircons ²⁰⁶Pb/²³⁸U weighted mean age of (148±2) Ma which suggests the basin sedimentation occurred in the Late Jurassic Period. Zircon U-Pb age data reflect Emoerhe Group deposition time was in Late Jurassic. It provides new evidences to restore the Mohe Basin evolution and resources exploration.
- Mohe Basin,
- Emoerhe Group,
- U-Pb geochronology

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References(10)

References

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