Microfacies types and their sedimentary environments from the lower permian Taiyuan formation in Jiaozuo area
Abstract：Based on the microscopic observation and description of fossil composition and lithological features in the carbonates （together 9 beds of limestones） from the Lower Permian Taiyuan Formation, 15 carbonate microfacies types were recognized, and also, the component and development characteristics of different carbonate microfaeies was analysed and summarized in this formation. The research results indicate that all beds of limestones formed in such sedimentary environments ranging from the beginning upper shallow sea （ restricted platform ） over fair-weather wave base to the lower shallow sea or open platform under fair-weather wave base, and the turn to the upper shallow sea, finally developed in bay-lagoon facies zone, in which the was largest transgression period occurred in the upper of L4 and middle of Ls. At that time, the deposit substrate generated in the reduction setting or oxygen-poor layer.
Keywords：carbonatemicrofacies typesTaiyuan Formation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 291-298 )