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Stratigraphic Study on Visean-Serpukhovian Boundary Interval in Varying Facies in Guangxi, Guizhou, China

Author: ShenYang
Tutor: JinXiaoChi
School: Chinese Academy of Geological Sciences
Course: Paleontology and stratigraphy
Keywords: Serpukhov order Visean Stratotype Biostratigraphy The north shore of group
CLC: P539
Type: Master's thesis
Year: 2009
Downloads: 28
Quote: 0
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Abstract


The International Carboniferous Visean - Serpukhov order Stratotype Section and Point (GSSP) is not yet established, the specific definition of the boundaries is also yet to be determined, North America and Eurasia contrast persists. China Southern Fang Qiangui - with Visean - Serpukhov-order boundary layer development of the best areas are well-developed sedimentary record from the shallow water shelf to the deep basin, is an ideal area to study such boundary layer. This article from the point of view of the stratigraphy of Guangxi, Guizhou different phase three typical profile of the area (the deep basin facies zone Guizhou Luodian profile satisfied celebrate, slope - basinal Guangxi Liuzhou touch the red section, shallow water platform facies zone Guizhou benefits water Ya Water sectional) study. Guangxi Liuzhou touch red profile Visean-order - the Serpukhov order boundary strata identification foraminifera 36 genera established Neoarchaediscus combinations and Howchinia bradyana of combinations, 31 genera; Guizhou of Luodian the satisfied celebrate section boundaries layer identification foraminifera, support and identification of foraminifera 22 genera endorsed WU Xiang (2009) and established Neoarchaediscus combination and Howchinia bradyana combination; layers in Guizhou Huishui elegant water profile boundaries, support and endorse the Wu Xiangding and (2008,2009) this establish Neoarchaediscus with, including the the Neoarchaediscus probatus subzones the, Howchinia bradyana subzones. With fossils of the two sub-zone (or combination) is widely distributed in foreign countries, Neoarchaediscus with (or a combination), the Howchinia bradyana band (or a combination) can be in a different phase region, as well as domestic and foreign good contrast. First now Howchinia bradyana position with the most potential Serpukhov order boundaries define Lochriea ziegleri, now roughly the same location (Richards et al., 2008; WU Xiang, personal communication 2009), and therefore, as Serpukhov order the end of an important sector of biostratigraphy flag, global contrast. The course of the study, the the Guangxi Liuzhou Carboniferous establish a new lithostratigraphic unit - North Shore group. Guangxi Liuzhou Carboniferous in the past between between of Luzhai group Terakado Group strata is known as the \there are significant differences, it is not appropriate to follow the gold group name. Comprehensive the author actual work with former data, Liuzhou and other \North shore group mainly outcrop in the north-central Liuzhou, Guangxi, Liujiang County, Luzhai County Liucheng, Huanjiang County and other places, the lithological that gray - dark gray thin - thick layer of limestone-based folder cherts, mudstones, sandstone, is a ramp - Basin sediments, the group can be divided into two third-order sequences, its formation era Mississippi Asia Jiwei Xian late - Serpukhov early.

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