The Pre-Sinian Darezha Formation is widely exposed in west Mianning.
冕宁西部是康滇地区前震旦系出露较集中的地段之一。
The opening and closing history may involve three major stages: pre-Sinian, Paleozoic and Meso-Cenozoic.
开合历史分为前震旦纪、古生代和中、新生代三大阶段。
Based on analysis of auriferous and geochemical properties of the meta morphic rocks, the authors hold that the major elements related to gold mineralization were derived from the Pre-Sinian System.
在分析变质岩的含金性及地球化学性质的基础上，认为与金成矿有关的主要元素均源自前震旦系。
The pre Sinian metamorphic series in the Micang Mountain area on the northern margin of the Yangtze Craton consist of the Houhe Group Complex, the Bajiaoshu Gneiss Complex and the Huodiya Group.
扬子克拉通北缘米仓山地区前震旦纪变质岩系由后河岩群、八角树片麻杂岩和火地垭群组成。
This paper deals with the relationship between uranium and strata, rock type, facies in the pre-Upper Sinian of west and central Hunan.
本文探讨了湖南西部和中部前上震旦统铀同地层、岩石类型、岩相之间的关系。
This paper deals with the relationship between uranium and strata, rock type, facies in the pre-Upper Sinian of west and central Hunan.
本文探讨了湖南西部和中部前上震旦统铀同地层、岩石类型、岩相之间的关系。
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