溧水火山岩盆地地球物理场特征及火山机构圈定  

Characteristics of geophysical field and delineation of volcanic structures in Lishui volcanic basin area

作　　者：张宝松[1] 邸兵叶[1] 黄宁[1] 朱红兵[1] 陈基炜 张俊[1] ZHANG Bao-song;DI Bing-ye;HUANG Ning;ZHU Hong-bing;CHEN Ji-wei;ZHANG Jun(Nanjing Center,CGS,Nanjing 210016,China)

机构地区：[1]中国地质调查局南京地质调查中心,南京210016

出　　处：《华北地质》2021年第1期39-44,60,共7页North China Geology

基　　金：中国地质调查局项目“江苏1/5万柘塘镇、天王寺、薛埠镇、博望镇、溧水县、竹箦桥幅综合地质调查(DD20160272)”。

摘　　要：溧水火山岩盆地位于长江中下游成矿带东部,与庐枞、宁芜等火山盆地具有较好的成矿条件、成矿作用与火山构造相关,研究火山构造对于研究成矿条件具有十分重要意义。本次在最新的1/5万重力调查基础上,分析研究了溧水火山岩盆地区重磁场分布特征,详细剖析溧水地区火山机构。研究结果表明:依据地质资料,综合利用重力剩余异常特征线、垂向导数、水平总梯度模等信息,可有效地识别火山机构,最终推断火山构造18处。The Lishui volcanic basin is located in the eastern of the middle and lower reaches of the Yangtze River metallogenic belt.It possesses good metallogenic conditions with volcanic basins such as Luzong,Ningwu and other volcanic basins.Therefore,the study of volcanic structure is of great significance for ore prospecting breakthrough.On the basis of the latest gravity survey of 1/50000 in the Lishui volcanic basin,not only the gravity and magnetic field distribution characteristics,and the relationship between typical volcanic structures and gravity-magnetic fields were analyzed and studied,but aslo the volcanic structures in Lishui area was identified.The results show that based on geological data,comprehensive use of information such as residual gravity anomaly,vertical derivative,and total horizontal gradient modes can effectively identify volcanic structures.Ultimately 18 volcanic structures were inferred.

关 键 词：溧水火山盆地 火山机构 重磁场 重力调查 

分 类 号：P588.1[天文地球—岩石学]