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
DOI: 10.12677/OJNS.2018.61015, PDF,    国家自然科学基金支持
作者: 徐丽琼, 马 欠, 邓春暖*：云南师范大学旅游与地理科学学院，云南 昆明
关键词: 大山包玄武岩；二叠纪晚期；生物灭绝；Mountain Package Basalt； Late Permian； Biological Extinction
摘要: 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。
Abstract: 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.
文章引用：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[J]. 自然科学, 2018, 6(1): 97-104. https://doi.org/10.12677/OJNS.2018.61015

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