峨眉山具有大面积的火山喷发后形成的玄武岩。它覆盖了云贵川三省的许多地区,其中就包括云南省昭通市的大山包。此文通过多种资料对峨眉山玄武岩(Emeishan basalt area, EBA),大山包整合、归纳,知道大山包火山活动发生在二叠系–三叠系(P-T)。同时,在这一时期发生了有史以来一次最大规模的生物灭绝。其成因可能是火山喷发所致。通过使用U-Pb对EBA下伏的岩石进行测定得到其主要喷发时间约为260 Ma。因此,大山包玄武岩形成在P-T边界内。大山包的火山活动和二叠系–三叠系生物大灭绝存在着很大的耦合性。 Emei Mountain has a large area of basalt formed after volcanic eruption. It covers many parts of the Yunnan, Guizhou and Sichuan provinces, including the Dashanbao in Zhaotong, Yunnan prov-ince. This paper integrates and summarizes the Emeishan basalt area (EBA) and Dashanbao package through a variety of data and knows that the Dashanbao volcanic activity occurred in the Permian-Triassic (P-T). At the same time, the largest biological extinction ever occurred in this period. It may be caused by volcanic eruption. By using U-Pb to measure the rock under the EBA, the main eruption time is about 260 Ma. Therefore, Dashanbao basalt formed within the P-T boundary. There is a great coupling between Dashanbao volcanic activity and the Permian-Triassic biological extinction.
大山包玄武岩,二叠纪晚期,生物灭绝, Mountain Package Basalt
Late Permian
Biological Extinction
大山包二叠系–三叠系火山活动与P-T边界生物大灭绝的耦合性<sup> </sup>
徐丽琼,马 欠,邓春暖. 大山包二叠系–三叠系火山活动与P-T边界生物大灭绝的耦合性Coupling of Permian-Triassic Volcanic Activity in Dashanbao with P-T Boundary Mass Biotic Extinction[J]. 自然科学, 2018, 06(01): 97-104. http://dx.doi.org/10.12677/OJNS.2018.61015
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