河南理工大学学报:自然科学版
河南理工大學學報:自然科學版
하남리공대학학보:자연과학판
JOURNAL OF HENAN POLYTECHNIC UNIVERSITY
2012年
3期
291-298
,共8页
宋慧波%张璐%牛永斌%胡斌%胡磊%杨连超
宋慧波%張璐%牛永斌%鬍斌%鬍磊%楊連超
송혜파%장로%우영빈%호빈%호뢰%양련초
碳酸盐岩%微相类型%太原组
碳痠鹽巖%微相類型%太原組
탄산염암%미상류형%태원조
carbonate%microfacies types%Taiyuan Formation
基于对焦作地区下二叠统太原组9层灰岩中的显微观察和描述以及化石组分和岩性特征的分析,将太原组碳酸盐岩划分为15种微相类型进行系统分析,之后总结出焦作太原组碳酸盐岩微相演化特征.从太原组灰岩段中碳酸盐岩微相类型的变化规律可以看出:该组灰岩段经历了从正常天气浪基面之上的近岸浅海相带(局限台地相)变为正常天气浪基面之下的远岸浅海相带(开阔台地相),再变到近岸浅海相带,最后变为海湾-潟湖相带的发展过程;显示太原组形成时期最大海侵的层位在L4上部和L8中部,沉积底层处于还原或弱还原环境.
基于對焦作地區下二疊統太原組9層灰巖中的顯微觀察和描述以及化石組分和巖性特徵的分析,將太原組碳痠鹽巖劃分為15種微相類型進行繫統分析,之後總結齣焦作太原組碳痠鹽巖微相縯化特徵.從太原組灰巖段中碳痠鹽巖微相類型的變化規律可以看齣:該組灰巖段經歷瞭從正常天氣浪基麵之上的近岸淺海相帶(跼限檯地相)變為正常天氣浪基麵之下的遠岸淺海相帶(開闊檯地相),再變到近岸淺海相帶,最後變為海灣-潟湖相帶的髮展過程;顯示太原組形成時期最大海侵的層位在L4上部和L8中部,沉積底層處于還原或弱還原環境.
기우대초작지구하이첩통태원조9층회암중적현미관찰화묘술이급화석조분화암성특정적분석,장태원조탄산염암화분위15충미상류형진행계통분석,지후총결출초작태원조탄산염암미상연화특정.종태원조회암단중탄산염암미상류형적변화규률가이간출:해조회암단경력료종정상천기랑기면지상적근안천해상대(국한태지상)변위정상천기랑기면지하적원안천해상대(개활태지상),재변도근안천해상대,최후변위해만-석호상대적발전과정;현시태원조형성시기최대해침적층위재L4상부화L8중부,침적저층처우환원혹약환원배경.
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.