1:5万重力调查研究治岭头地区火山构造与矿产分布关系

浙东南地区是我国东南沿海火山岩带的重要组成部分.晚侏罗世火山岩广布,厚度可达1～2 km,局部3 km以上,说明该时期火山活动十分频繁.伴随火山作用形成了与火山热液有关的各种矿产,圈定火山构造也就成为探寻各种矿产的重要途径.以治岭头地区为例,说明1:5万重力调查在圈定Ⅳ、Ⅴ级火山构造中的效果及作用,并对区内矿产与火山构造的关系进行探讨,进而指出该区进行地质找矿的最有利地段.

THE RELATIONSHIP BETWEEN VOLCANIC STRUCTURES AND ORE RESOURCE DISTRIBUTION IN ZHILINGTOU AREA BASED ON 1:50 000 GRAVITY SURVEY

Southeastern Zhejiang is an important component part of the Southeast China volcanic belt. Late Jurassic volcanic rocks are widespread, and their thickness is 1～2 km and locally even reaches over 3 kilometers, suggesting that volcanic activities were very frequent in that period. There exist various mineral deposits related to volcanic hydrothermal fluids in this area, and hence the delineation of volcanic structures constitutes an important means for discovering various kinds of ore resources. With Zhilingtou area as an example, this paper indicates the role of 1:50 000 gravity survey in Ⅳ and Ⅴ grade volcanic structure delineation, probes into the relationship between volcanic structures and mineral deposits in this area, and then points out the most favorable places in the ore prospecting work of this area.