塔中地区寒武系—下奥陶统白云岩层序不整合面控制的大气水溶蚀作用研究

Meteoric water karstification controlled by sequence unconformity of Cambrian-Lower Ordovician in Tazhong area

塔里木盆地塔中地区寒武系—下奥陶统主要为碳酸盐岩沉积,受沉积相的影响,层序不整合面控制的早期大气水溶蚀作用广泛发育。依据岩心、岩石薄片、碳氧稳定同位素分析、锶同位素分析、阴极发光分析等资料的研究,探讨认识了层序不整合面控制的早期大气水溶蚀作用的岩石矿物学特征、地球化学特征及岩溶作用特征,在此基础上,建立了塔中地区寒武系—下奥陶统层序不整合面控制的早期大气水溶蚀作用模式。

The Cambrian-Lower Ordovician is mainly carbonate sediment in Tazhong area of Tarim Basin. Affected by sedimentary facies, the early meteoric water karstification under the control of the sequence unconformity boundary developed well. Based on the analysis of core, rock slice, carbon and oxygen stable isotope, strontium isotope and cathodoluminescence, the characteristics of petrology and mineralogy, geochemistry and karstification of the early meteoric water karstification are discussed. The early meteoric water karstification model under the control of the sequence unconformity boundary of Cambrian-Lower Ordovician in Tazhong area is established.