中国岩溶2017，Vol.36Issue(3)：306-312,7.DOI:10.11932/karst20170303
贵州南部紫页1井威宁组沉积微相特征及其沉积演化
Characteristics of sedimentary microfacies of the Weining formation and its evolution in the Well Ziye-1, located in southern Guizhou Province, China
摘要
Abstract
The sedimentary rock of the Weining formation in the Ziyun area is characterized by platform margin algal mound deposits.Intensive study of borehole core from the well Ziye-1 shows that the sedimentary facies of the Weining formation is in total an upward grading sequence due to sea regression taking place under platform marginal reef to open platform environment.Meantime,it includes three subfacies as platform margin algal mound,restricted platform and open platform subfacies which can be further divided into six microfacies,i.e.biological bounded stone (SMF7),bioclastic argillaceous limestone with skeletal fragment/grain lime-argillaceous limestone (SMF10),oncolite rudstone/grained limestone (SMF13),aggregate grained limestone (SMF17)、homogen abiological micrite (SMF23) and clastic floating rock/rudstone/breccia (SMF24).Sedimentary filling sequence of the Weining formation also consists of six sedimentary cycles which is lithologically similar to the above sedimentary microfacies.Each sedimentary cycle mainly comprises limestone algae clot formed under a platform marginal reef environment.However,the lithology slowly changes to bioclastic limestone produced in upward open platform condition.The results indicated that the Weining formation had experienced at least six times of sea-level fluctuation;Furthermore,The emergence of the Weining formation marked the end of the organic-rich mud shale of Dawuba formation produced at a slope facies along the northwest trough-basin margin in Luodian-Shuicheng area.关键词
紫页1井/威宁组/微相特征,沉积演化/贵州Key words
Well Ziye-1/Weining formation/characteristics of sedimentary microfacies/sedimentary evolution/Guizhou Province分类
天文与地球科学引用本文复制引用
陈厚国,潘明,王敏,卢树藩,罗香建,朱勋..贵州南部紫页1井威宁组沉积微相特征及其沉积演化[J].中国岩溶,2017,36(3):306-312,7.基金项目
中国地质调查局油气资源调查中心《南方地区1∶5万页岩气基础地质调查》子项目《贵州晴隆地区1∶5万页岩气地质调查》(12120115102001) （12120115102001）
西南岩溶区1∶5万地质填图试点项目(DD20160061) （DD20160061）
