北京大学学报（自然科学版）2019，Vol.55Issue(6)：1055-1066,12.DOI:10.13209/j.0479-8023.2019.081
辽宁西部北票地区高于庄组白云岩沉积特征研究
Sedimentary Characteristics of Dolomite from Gaoyuzhuang Formation in Beipiao Area,North China
摘要
Abstract
The Neoproterozoic Gaoyuzhuang dolomite from Beipiao area,western Liaoning Province was syste-matically studied based on outcrop and microscope observations.The whole section is composed of several cyclic shallowing upward units (subsequences),which include subtidal massive dolomite and intertidal thin-bedded dolomite.Three types of microfacies,microspar dolomite,dolomicrite and intraclast dolomite,were identified.Partial recrystallization and silica filling/replacement are associated with each microfacies.The chert bands and nodules,which are commonly distributed along the stratigraphic layers,was probably formed during the syn-depositional stage.Silica filling/replacement may have great contributions to dolomite dissolution and recry-stallization and therefore improve the porosity of the dolomite,potentially leading to the formation of the excellent dolomite reservoir.Therefore,silica filling/replacement during the syn-depositional stage is significant for the development and evolution of dolomite reservoirs.关键词
北票地区/高于庄组/白云岩/硅质充填/硅质交代/孔隙度/储层Key words
Beipiao area/Gaoyuzhuang Formation/dolomite/silica filling/silica replacement/porosity/reservoir引用本文复制引用
丁伟铭,甯濛,秦树健,董琳..辽宁西部北票地区高于庄组白云岩沉积特征研究[J].北京大学学报（自然科学版）,2019,55(6):1055-1066,12.基金项目
国家自然科学基金(41672334,41402025)资助 （41672334,41402025）
