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浙江省丽水市关塘―蛤湖地区位于江山―绍兴拼接带与余姚―丽水深断裂之间的变质基底隆起区,成矿地质条件较好。为研究区内基底构造形态、火山构造、隐伏岩体等基础地质问题,开展了1∶5万重力调查。重力成果表明,西岱―西溪―季岱梯级带为基底断陷与隆起区的界线,剩余重力正异常为基底隆起的反映,负异常为基底凹陷的反映。区内矿产分布与基底构造关系密切,变质热液型铅锌、多金属矿多分布在变质基底出露区,金银矿多位于基底浅覆盖区,基底凹陷区内多金属矿与侵入岩或火山构造有关。综合地质物化探资料,圈定5个成矿远景区,为区内地质找矿工作的部署提供了地球物理依据。
The Geotang-Clam region in Lishui City, Zhejiang Province, is located in the metamorphic basement uplift between Jiangshan-Shaoxing splicing zone and Yuyao-Lishui deep fault, and the metallogenic geological conditions are good. In order to study basic geological problems such as basement structure, volcanic structure and concealed rock mass in the area, a 1: 50000 gravity survey was conducted. Gravity results show that the Xidai-Xixi-Qidai cascade belt is the boundary between basement and uplift, and the residual gravity anomaly is the reflection of basement uplift. The negative anomaly is the reflection of basal depression. The mineral distribution in the area is closely related to the basement structure. The metamorphic hydrothermal Pb-Zn and polymetallic deposits are distributed in the outcropping area of the metamorphic basement. The gold-silver mines are mostly located in shallow basement areas, polymetallic mines in the basement depressions and intrusive rocks or Volcanic structure related. Comprehensive geophysical and geochemical data, delineated five metallogenic prospect, providing geophysical basis for the deployment of geological prospecting work in the area.