大关悦乐奥陶-志留统沉积地球化学特征及古环境意义

摘要

选取云南昭通大关悦乐矿区一个代表性剖面进行宏观和微观两方面的研究.宏观方面从野外产状态、岩石组合以及沉积环境等方面对大关悦乐矿区的地层做了比较系统的研究；微观方面开展了沉积岩常量元素地球化学研究,试图用系统的地球化学方法来更进一步揭示研究区在地史上这段时期的沉积地球化学特征和古环境的变迁.%One representative sections of Zhaotong Daguan Yuele to discuss in two aspects that the macro and the micro is choosed. The macro aspects conducted systemic research on the production from the wild state, rock composition and depositional environment, of the Zhaotong Daguan Yuele diggings strata; micro aspects conducted sedimentary rocks geochemistry research of constant element. Trying to use the system geochemical method further to find the change of the ancient sedimentary geochemistry of the study area in this history period.