Origin and age of Mn deposits of the Nantuo Formation in the Sinian System
Origin and age of Mn deposits of the Nantuo Formation in the Sinian System作者机构:Center of Modern Analysis Nanjing University Nanjing China Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China
出 版 物:《Chinese Science Bulletin》 (科学通报(英文版))
年 卷 期:1997年第42卷第24期
页 面:2072-2075页
核心收录:
学科分类:070902[理学-地球化学] 0709[理学-地质学] 07[理学]
主 题:Neoproterozoie ice age Mn deposit isotopic age.
摘 要:THE tillites in the Nantuo Formation of the Sinian System is considered contemporary with theVaranger ice age. The manganese deposits in the Nantuo Formation are most suitable to iso-topic dating and may record the precious information on paleo-ocean chemistry. However,there have heen different views and disputations about their origin and age for a long time. The Sinian System in the Yangtze region is divided into 3 formations from base to top:the Nantuo Formation, the Doushantuo Formation and the Dengying Formation. The