摘要
根据云南东川矿区前寒武纪地层中叠层石的形态,按叠层石的总貌、主要分型特征和细微结构,提出了在野外较易分辨的类、型、体三级命名方案。通过分析东川地区前寒武纪叠层石形成环境、矿体特征、与"东川式"铜矿有关的岩相特征,以及在不同的沉积环境内,叠层石组合和相应的沉积相的变化规律,提出潮间环境及浅水泻湖环境是成矿重要的有利区域,叠层石组合和沉积相对于"东川式"铜矿空间分布具有指示意义。
According to the morphologies of stromatolites in the Precambrian outcrops of the Dongchuan mining area,Yunnan, a new three-level nomenclature, namely class, type and body is put forward in accordance with general appearance, main classification features and fine structures, which is easier to identify in the field. Some relevant information about Precambrian stromatolites are analyzed in Dongchuan mining area as follows： the formation environment, its ore-body characteristics, the lithofacies features related to Dongchuan-type copper mine in Dongchuan area, and the corresponding change of rules o{ stromatolite combinations and sedimentary facies in different sedimentary environments, etc. It is shown clearly that the intertidal environment and shallow lagoon environment are important favourable metallogenic zones. Thus, the stromatolite assemblages and lithofacies exert serious impact on the spatial distribution of Dongchuan-type copper mine.
出处
《古生物学报》
CAS
CSCD
北大核心
2015年第3期387-395,共9页
Acta Palaeontologica Sinica
基金
科技部转制科研院所专项资金项目(2011EG115022)资助
关键词
叠层石
命名方案
矿体分布
前寒武纪
东川
云南
Stromatolite, naming scheme, ore-body distribution, Dongchuan, Yunnan
