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《Chinese Geology》 2002-02
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Problems and mapping method in mapping pre-Sinian low-grade metamorphic terrains of South China

ZHANG Ze-jun,ZHANG Zhi ,ZHANG Xiong-hua (1.Faculty of Earth Sciences,China University of Geosciences,Wuhan430074,Hubei,China)  
Pre-Sinian low-grade metamorphic rocks in South China are a special rock type,which is dif-ferent from not only medium-and high-grade metamorphic rocks but also sedimentary rocks.Because of its particularity and lacking of a mapping method specially for them,there are a number of prominent problems in displaying the available results of regional survey,e.g.there is much difference between the presentation of the map and words and the temporal-spatial distribution of geologic bodies.Through an analysis of major problems and practice and checking of several related projects,the authors have prelimi-narily summed up a mapping method,i.e.proceeding from an analysis of an area,first establish a litho-logic maker bed and structural style of the area,and then take the marker bed and structural style as the core and extrapolate and extend them to other areas;on the basis of gaining knowledge and checking the results repeatedly,establish mapping units and perfect and finalize the structural style and structure of the map surface
【Fund】: 中国地质调查局国土资源大调查项目(20001300002051)资助。
【CateGory Index】: P623.1
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