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在六盘山地区下白垩统六盘山李洼峡组中发育了湖相丘状叠层石,通过对叠层石的特征和叠层石地球化学组分分析表明,研究区叠层石主要产于安静低能水体环境,而且对沉积物的捕捉和粘附作用不甚明显,生物膜的钙化和原地微生物引发的沉淀作用是主要成因。经分析,研究区叠层石的Sr/Ba值为12.36,CaO含量为45.56%,总体上,研究区叠层石形成于盐度高且温度较高、气候炎热、蒸发量大而且较为干旱的环境。
The lacustrine mound lamellae are developed in Liwaxia Formation of the Lower Cretaceous Liupanshan in the Liupanshan area. Based on the characteristics of the stratigraphic rocks and the analysis of the geochemical composition of the stratigraphic rocks, it is shown that the strata in the study area are mainly produced in the Quiet low-water environment, and the sediment capture and adhesion is not obvious, the biofilm calcification and in situ microbial-induced precipitation is the main cause. According to the analysis, the Sr / Ba value of the stratigraphic rocks in the study area is 12.36 and the CaO content is 45.56%. Generally speaking, the stratigraphic rocks formed in the study area have high salinity and temperature, hot climate, large evaporation and more drought surroundings.