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震旦纪南沦冰期锰矿保存了古海洋化学的宝贵信息,是南沱冰期沉积地层中不可多得的研究对象.它们的起源和形成时代对于探讨晚元古代末期全球发生的巨大地质变化及确定地层时序标准具有重要意义.但长期以来对此一直有不同的看法.本文试图通过对南沱组锰矿的元素地球化学测定和Sm-Nd法定年,对此进行探讨.
The Sinian Nanning glacial manganese preserved precious information of paleoceanochemistry and is a rare object of study in the Nantuo glacial sedimentary strata.The origin and age of their formation is of great significance to the exploration of the tremendous global geological changes and determination of the late Proterozoic Stratigraphic timing standards are of great significance, but this has long been a different view.This paper attempts to explore the elemental geochemistry and Sm-Nd dating of manganese ore in Nantuo Formation.