贵州松桃县盘石镇中寒武统清虚洞组微生物岩沉积微相及模式  

Investigation of sedimentary microfacies and microbial rock in the Middle Cambrian Qingxiudong Formation in Panshi Town in Songtao County of Guizhou Province

作　　者：唐杰 王琳霖 任静 孙珮婕 马慧 罗振峰 苏中堂[1,3] TANG Jie;WANG Linlin;REN Jing;SUN Peijie;MA Hui;LUO Zhenfeng;SU Zhongtang(Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;SINOPEC Petroleum Exploration and Production Research Institute,Beijing 100083,China;Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resource,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学沉积地质研究院,成都610059 [2]中国石化石油勘探开发研究院,北京100083 [3]自然资源部深时地理环境重建与应用重点实验室(成都理工大学),成都610059

出　　处：《成都理工大学学报（自然科学版）》2024年第2期181-192,209,共13页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金项目(41972104)。

摘　　要：贵州松桃地区清虚洞组地层记录下了早寒武时期古杯生物灭绝后,微生物岩从逐渐繁盛到再灭亡这一完整的微生物演化序列。本文在实测盘石剖面,逐层采样磨制薄片鉴定分析的基础上对清虚洞组的沉积微相类型进行了研究,明确了含泥质条带微晶灰岩、葛万藻黏结灰岩、附枝藻藻格架灰岩、细小附枝藻灰岩、凯内拉藻藻格架灰岩、含凯内拉藻灰岩、上射小波托麦藻—尼科尔森藻藻格架灰岩、肾形藻灰岩、藻屑灰岩、砂屑灰岩、微晶灰岩、钙质泥岩12类沉积微相;建立了3类向上变浅的沉积序列:泥岩—灰岩—藻灰岩、云质灰岩—白云岩及礁基—礁核—礁盖;构建了该地区钙藻受同沉积断层控制在盆地边缘成礁的碳酸盐岩镶边台地模式。The stratigraphy of the Qingxudong Formation in Songtao County in Guizhou Province of China reflects a complete microbial evolutionary sequence in which microbial rocks gradually flourished and then died-out after the extinction of Archaeocyatha in the Early Cambrian period.In this study,we examined the sedimentary microfacies of the Qingxudong Formation based on the measured Panshi section,layer-by-layer sampling,and identification and analysis of thinly ground sections.We identified 12 types of sedimentary microfacies:muddy striped microcrystalline limestone,Girvanella boundstone,epiphytic algal limestone,epiphytic pusillnm Korde algal limestone,Kenella algal limestone,Kenella algal containing limestone,Botomaella anabatica Voronova and Nicholsomia algal limestone,Renalcis chabakoviaformis Voronova algal limestone,algal arene limestone,arene limestone,microcrystal limestone,and calcareous mudstone.We also identified three types of upward-shallowing sedimentary sequences:mudstone-limestone-algal limestone,limestone-dolomitic limestone,and reef base-reef core-reef cover.We used these results to construct a model of the rimmed carbonate platform in the region where the Coralline algae were controlled by syn-sedimentary faults to reef at the margin of the basin.

关 键 词：钙藻 附枝藻 沉积模式 碳酸盐岩台地 清虚洞组 

分 类 号：P58[天文地球—岩石学]