The palynological assemblage of the Longjiang Formation in Zhalantun area, Inner Mongolia, and its geological implications

QIN Tao; LI Linchuan; QIAN Cheng; JIANG Bin; SUN Wei; NA Fuchao; MA Yongfei; ZANG Yanqing

2018 Vol. 37, No. 9

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QIN Tao, LI Linchuan, QIAN Cheng, JIANG Bin, SUN Wei, NA Fuchao, MA Yongfei, ZANG Yanqing. The palynological assemblage of the Longjiang Formation in Zhalantun area, Inner Mongolia, and its geological implications[J]. Geological Bulletin of China, 2018, 37(9): 1571-1578.

Citation:

QIN Tao, LI Linchuan, QIAN Cheng, JIANG Bin, SUN Wei, NA Fuchao, MA Yongfei, ZANG Yanqing. The palynological assemblage of the Longjiang Formation in Zhalantun area, Inner Mongolia, and its geological implications[J]. Geological Bulletin of China, 2018, 37(9): 1571-1578.

The palynological assemblage of the Longjiang Formation in Zhalantun area, Inner Mongolia, and its geological implications

1.
Shenyang Institute of Geology and Mineral Resources, Shenyang 110034, Liaoning, China
2.
College of Earth Science, Jilin University, Changchun 130061, Jilin, China

Received Date: 20 March 2018

Revised Date: 03 July 2018

Publish Date: 15 September 2018

Abstract

Abstract

Located in the southeastern Chenjisihan Town of Zhalantun area, the Longjiang Formation in the ChenjisihanYizhan contains abundant palynological fossils but rare macrofossils. The lithological assemblages of the lower Longjiang Formation are composed mainly of sedimentary tuff, tuff, sandstone and conglomerate, while those of the upper Longjiang Formation comprise predominantly andesite and dacite. By analyzing the palynological fossils from the Longjiang Formation in the ChengjisihanYizhan area, the Cyclogranisporites-Erlianpollis pollen assemblage zone was recognized. Several palynological fossils, such as Erlianpollis, Cicatricosisporites and Pilosisporites, indicate that the palynological fossils of the Longjiang Formation of Chengjisihan area formed in Early Cretaceous. In combination with geological characteristics and quantitative analysis of plant fossils and palynological fossils, vegetation species of the Longjiang Formation point to a subtropical climate and a warm and humid environment.
- Zhalantun area, Inner Mongolia /
- Longjiang Formation /
- palynological assemblage

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References

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