1∶50 000 Geological Map Database of Yuanqu Map-sheet, Shanxi Province

The  1∶50  000  geological  map  database  of  Yuanqu  map-sheet  (I49E005015), Shanxi  Province  was  developed  in  accordance  with  the  standards  and  requirements  of geological  surveys  proposed  by  the  China  Geological  Survey  and  the  unified  standards  and requirements applicable to the geological industry, for which the achievements obtained from previous  1∶200  000  and  1∶250  000-scale  regional  geological  surveys  were  fully  utilized. Meanwhile,  the  Digital  Geological  Survey  System  (DGSS)  was  adopted  for  geological  field mapping.  A  total  of  54  samples  for  petrochemical  analysis  and  seven  samples  for  isotope dating were collected in the field. The following achievements were obtained by establishing the Database. The material composition of the metamorphic basement in Zhongtiao Mountain area  and  the  tectonic  framework  of  the  area  were  ascertained  by  breaking  up  the  Sushui complex in the area. The Paleoproterozoic boundary of Zhongtiao Mountain was redetermined and a new division scheme of the boundary was put forward. The volcanic structures, lithology and lithofacies, and volcanic strata of the Mesoproterozoic Xiong’er Group were mapped, and isotopic  dating  was  conducted  for  the  group.  As  a  result,  the  age  of  Mesoproterozoic  lower boundary  of  Zhongtiao  Mountain  was  restricted.  Furthermore,  the  characteristics  of metamorphic  rock  formations  were  systematically  summarized,  and  three  stages  of  tectonic superimposition  patterns  of  the  Paleoproterozoic  in  Zhongtiao  Mountain  were  proposed.  All these will provide important guidance for the research on metallogenic rules and controlling structures  of  the  Hu-Bi  type  copper  deposits  in  the  core  Cu  mining  area  in  Zhongtiao Mountain.