Geoscience ›› 2005, Vol. 19 ›› Issue (1): 119-126.
• Engineering Geology and Environmental Geology • Previous Articles Next Articles
Mao Jia ren
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Abstract:
Located at the oldland margin from the Devonian to the Carboniferous, the Devonian System at the Wudang section includes the Mangshan Group clastic rocks and the Gaopochang Formation dolomites, and can be grouped into 5 thirdorder sequences.The Carboniferous System to the Permian Chuanshanian Series includes the Xiangbai, the Jiusi, the Shangsi, the Baizuo, the Huanglong, the Maping and the Liangshang Formation,which can be divided into 5 thirdorder sequences. The Xiangbai Formation and the Liangshan Formation are constituted by coalmeasures, the other formations are marked by carbonates. Compared with the coeval strata in the southern part of Guizhou and the Guangxi area that are characteristic of the integrity records of strata (the Devonian System can be divided into 13 thirdorder sequences and the Carboniferous to the Permian Chuanshanian Series can be grouped into 6 thirdorder sequences), many thirdorder sequences from the Devonian to the Permian Chuanshanian Epoch are absent. Therefore, the Wudong section of the Devonian System to the Permian Chuanshanian Epoch is of a typical example that the hiatus is larger than the deposits, which might be resulted from the stronger response of regression than that of transgression. As the result of the largescale and slowspeed transgression in the transitional period from the Carboniferous to the Permian, the study area together with the adjacent areas became a sea area. This transgression is genetically related to the thirdorder rise of sealevel changes of the SQ19. Therefore, divisions of thirdorder sequences of the Permian Yangsingian and Lepingian are similar to those in the southern part of Guizhou as well as in Guangxi.
Key words: transgressive-regressive sequences, the Upper Paleozoic, the Wudang section in Guiyang
CLC Number:
P539.2
Mao Jia ren. Transgressive-Regressive Sequences of the Upper Paleozoic at the Wudang Section in Guiyang[J]. Geoscience, 2005, 19(1): 119-126.
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