摘要
重力、磁法是寻找和圈定磁铁矿床经济有效的地球物理手段,通过大勐龙地区大中比例尺重、磁物理场测量和异常分析,结合火山喷溢沉积-气液变质改造型磁铁矿床的基本特征,建立了研究区的地质-地球物理磁铁矿找矿模型。并以此模型对区内圈定的重、磁物探异常进行对比、分析,不仅扩大了已知矿床的规模,而且发现了隐伏磁铁矿体。
Gravity and magnetic methods are conomical and effective geophysical means to find and delineate magnetite deposits.Based on the large and medium scale gravity and magnetic field measurement and anomaly analysis in Damenglong area,combined with the basic characteristics of volcanic eruption sedimentation gas-liquid metamorphism modified magnetite deposit,a geological-geophysical magnetite prospecting model of the study area is established.Based on this model,the gravity and magnetic geophysical anomalies delineated in the area are compared and analyzed,which not only enlarges the scale of known ore deposits,but also finds concealed magnetite ore bodies.
作者
张天翼
孙立伟
ZHANG Tianyi;SUN Liwei(Institute of Geophysical Exploration of Jilin Province,Changchun 130012,Jilin,China)
出处
《吉林地质》
2021年第3期22-26,共5页
Jilin Geology
基金
云南省景洪市大勐龙地区1∶5万重力调查(Z201104)。
关键词
重、磁测量
磁铁矿找矿模型
大勐龙地区
Gravity and magnetic survey
magnetite prospecting model
Damenglong area
