GEOCHEMICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM LOWER PERMIAN YUJIABEIGOU FORMATION IN NORTHERN CHIFENG, INNER MONGOLIA

GUO Wei; YANG Xinde; ZHANG Juan; HAO Bin

Volume 17 Issue 3

Sep. 2011

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GUO Wei, YANG Xinde, ZHANG Juan, et al., 2011. GEOCHEMICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM LOWER PERMIAN YUJIABEIGOU FORMATION IN NORTHERN CHIFENG, INNER MONGOLIA. Journal of Geomechanics, 17 (3): 295-302.

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GEOCHEMICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM LOWER PERMIAN YUJIABEIGOU FORMATION IN NORTHERN CHIFENG, INNER MONGOLIA

1.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciencses, Beijing 100081, China

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Received: 2011-04-28
Published: 2011-09-28

Abstract

Abstract

Located in northern Chifeng, Inner Mongolia, the clastic sedimentary rocks of Lower Permian Yujiabeigou Formation is mainly distributed at the Inner Mongolia uplift in the northern margin of North China craton.These clastic sedimentary rocks are dominated by graywackes, and their source rocks have not been fully handling and sorting, with relatively low maturity.The studying results have shown that light and heavy rare earth elements differentiate distinctly, and that light rare earth elements are obvious enrichment while the heavy rare earth elements stay stable.The values of δEu vary from 0.72 to 0.99, show negative Eu anomalies particularly and are similar with NASC or PAAS distributing model, which suggest that these sediments are sourced from upper crust.Combining with the predecessors' achievements, it is obtained that the original rocks of these sediments' parent rocks mainly are consist of sedimentary rocks and granites, with a small amount of basalt; The geotectonic background of these sediments' source area is active continental margin or continent island arc, which may show that this studying area is in the suture stage between Siberia plate and North China craton in Lower Permian or earlier time.
- Lower Permian,
- clastic sedimentary rock,
- geochemical characteristics,
- active continental margin,
- continent island arc

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References(19)

References

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