Citation: | LI Jianrong, SUN Hua, LIU Weidong, HOU Donghong, ZHAO Jianxin. 2020. 1∶50 000 Geological Map Database of Yuanqu Map-sheet, Shanxi Province[J]. Geology in China, 47(S1): 135-145. doi: 10.12029/gc2020Z113 |
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.
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Geological map of the northern part of Zhongtiao mountain (modified after Zhao FQ et al., 2006)
The 1∶50 000 formation and structure map of Yuanqu map-sheet (I49E005015), Shanxi province
Hujiayu copper deposit–Laobaotan geological structural profile in Yuanqu map-sheet