鄂西利川地区二叠-三叠系界线附近地层的碳酸盐微相类型和早三叠世火山活动的证据

刊出日期: 2015-06-25

Carbonate microfacies in strata near the Permian-Trias-sic boundary and the volcanic activity evidence in the early Triassic in Lichuan area, Western Hubei Province

Publish Date: 25 June 2015

摘要: 本文对湖北利川地区两个剖面的二叠-三叠系界线层序进行了沉积微相分析,划分出6种微相类型,讨论了每种微相的成因和沉积环境,揭示了微相环境的演变规律。并且对早三叠世的火山活动进行了讨论,以此探讨P/T之交生物礁和微生物岩的古环境意义以及生物大灭绝的诱因。
- 碳酸盐岩微相 /
- 微生物岩 /
- P/T界线 /
- 生物大灭绝
Abstract: Carbonate microfacies sequence analysis is carried out in two sections of the Permian-Triassic boundary in Lichuan area, Hubei province, which can be divided six microfacies types, and genesis and sedi-mentary environment of each kind microfacies are discussed to reveal the revolution of micro environment. The volcanic activities in the Early Triassic in this area are also discussed. The combined evidence is used to investigate the palaeoenvironment significance of the reef and microbialite, and the cause of the biomass ex-tinction in the Permian-Triassic boundary.
- carbonate microfacies /
- microbialite /
- Permian-Triassic boundary /
- biomass extinction