中国岩溶2017，Vol.36Issue(3)：313-318,6.DOI:10.11932/karst20170304
贵州水城地区早二叠世包磨山组碳酸盐岩微相特征及沉积环境
Carbonate rocks micro-characteristics and paleoenvironment significance in Baomoshan formation of early Permian of Shuicheng area, Guizhou Province, China
摘要
Abstract
Baomoshan formation of the Early Permian widely distributes in Shuicheng area;its lithology is a layer of carbonate rock with an intercalated thin clastic rocks.The composition of the carbonate rocks greatly changes in horizontal direction.In this study,9 strip plane sections and more than 300 pieces of rock thin sections were measured and analyzed,from which 6 microfacies were summarized.These microfacies include abundant foraminiferal grainstone/ bioclastic lime-argillaceous limestone (SMF18),bioclastic lime-argillaceous limestone with skeletal fragment/grain lime-argillaceous limestone (SMF10),oncolite rudstone/grained limestone (SMF13),sea lily enriched limestone (SMF12-CRIN),the shells of skeletal fragment (SMF11) and biological boundstone (SMF7).Through the comparison of different sections of rock structure,biological assemblage and hydrodynamic energy feature,the results show that the sedimentary environment of the Baomoshan formation was betweenopen sea platform and sea platform margin,with at least three times of the sea regression events from the northwest to the southeast in Shuicheng area,which coincide with the trough basin shrinking period deposition effect of this area.关键词
沉积环境/碳酸盐岩微相/水城地区/包磨山组Key words
sedimentary environment/carbonate micro-characteristics/Shuicheng area/Baomoshan formation分类
天文与地球科学引用本文复制引用
龙建喜,陈建书,彭成龙,潘明,龚桂源..贵州水城地区早二叠世包磨山组碳酸盐岩微相特征及沉积环境[J].中国岩溶,2017,36(3):313-318,6.基金项目
《贵州乌蒙山区1∶5万普立、玉舍、阿嘎、鸡场、杨梅、猴场6幅区域地质矿产调查》(基[2013]01-008-010) （基[2013]01-008-010）
西南岩溶区1∶5万地质填图试点项目(DD20160061) （DD20160061）
