酒泉盆地胳塘沟组微量元素地球化学特征及其古环境研究  

作　　者：于秋莲[1] 陈载林[1] 彭明兴[1] 张展适[2] 

机构地区：[1]云南国土资源职业学院,昆明652501 [2]东华理工大学,南昌330013

出　　处：《科技创新与应用》2025年第2期89-93,共5页Technology Innovation and Application

基　　金：国家自然科学基金(41862008);云南国土资源职业学院教师科研项目(2024YJ18)。

摘　　要：通过对酒泉盆地胳塘沟组21件剖面样品的微量元素进行深入分析,定性-半定量地研究该区的古气候环境。研究表明,样品中,Sr/Ba比值为0.05~0.27,该研究区主要以淡水环境为主,局部表现出咸水环境特征。δU均值为0.85,该区沉积环境总体为氧化-弱还原环境。经古水深的计算,该区平均深度为18.29 m,表明整体水体深度较浅。Sr/Cu的比值平均值为6.22,说明研究区表现为温暖湿润的气候。Through in-depth analysis of trace elements in 21 section samples from the Getanggou Formation in Jiuquan Basin,the paleoclimatic environment in this area was qualitatively and semi-quantitatively studied.The study shows that the Sr/Ba ratio in the samples ranges from 0.05 to 0.27.The study area is mainly freshwater environment,with local characteristics showing saltwater environment.The mean value ofδU is 0.85,and the sedimentary environment in this area is generally oxidation-weak reduction environment.According to the calculation of ancient water depth,the average depth in this area is 18.29 m,indicating that the overall water body depth is shallow.The average Sr/Cu ratio is 6.22,indicating that the study area has a warm and humid climate.

关 键 词：微量元素 古气候环境 酒泉盆地 化学特征 环境变化 

分 类 号：P5[天文地球—地质学]