石油实验地质2012，Vol.34Issue(6)：623-628,6.
塔里木盆地轮南地区奥陶系岩溶缝洞充填物地球化学特征及环境意义
Geochemical features and environmental significances of deposits in Ordovician karstic fractures and caves, Lunnan area, Tarim Basin
摘要
Abstract
In the Ordovician karstic fractures and caves in Lunnan area of the Tarim Basin, three types of deposits have been identified including water mechanical fillings, chemical deposits and gravity collapse debris. The comparisons of chemical and trace element compositions between deposits and bedrocks have indicated that when different deposits were formed, fluid properties and hydrological environment were different, and the migration, enrichment and fractionation of elements were also different. As a result, the chemical and trace element compositions can be used to judge the fluid properties and hydrological environment when the Ordovician karstic fractures and caves were filled. Three kinds of filling environment have been found including oxidizing active freshwater environment in seepage-active undercurrent zone, freshwater environment in stagnant undercurrent zone as well as pressure-released and hot water environment in shallow-buried zone. The study is helpful for karstic reservoir prediction and evaluation.关键词
古岩溶/化学淀积物/微量元素/聚类分析/潜流带Key words
paleokarst/ chemical deposit/ trace element/ cluster analysis/ undercurrent zone分类
能源科技引用本文复制引用
淡永,梁彬,曹建文,张庆玉..塔里木盆地轮南地区奥陶系岩溶缝洞充填物地球化学特征及环境意义[J].石油实验地质,2012,34(6):623-628,6.基金项目
国土资源部重大专项(201211082)资助. （201211082）
