低空高精度磁测方法在未知区找铁的应用——以柬埔寨罗文真穹隆为例

罗文真穹隆构造区属柬埔寨北部暹粒-上丁成矿带，主要矿种为铁.已发现铁矿床主要有表生残坡积矿和原生矿两种形式，矿体呈层状、似层状、囊状、透镜状，矿物组合为赤铁矿-磁铁矿-褐铁矿.已发现主要铁矿床有格高铁矿、石山铁矿、诺东山铁矿.穹隆内大范围未知区与已知矿床具有类似的成矿地质背景.为快速评价未知区内铁成矿背景，利用动力三角翼低空高精度磁测技术，综合地质-遥感信息进行找矿预测，并结合地面磁测进行验证.共圈定12个找矿预测区，其中4个为一级找矿靶区，为下一步的主要工作方向.

APPLICATION OF LOW-ALTITUDE HIGH-PRECISION MAGNETIC SURVEY FOR IRON DEPOSITS IN UNPROVEN AREAS:A Case Study of Rovieng Cheung Dome in Cambodia

The Rovieng Cheung dome structure is located in the Siem Reap-Stung Treng metallogenic belt with the main mineral of iron in northern Cambodia.The discovered iron deposits,including Gygoye iron deposit,Rock Mountain iron deposit and Nuodongan iron deposit,mainly consist of supergene residual deluvial ores and primary ores,with orebodies occurred in layered,stratoid,cystic and lenticular forms,and mineral assemblages of hematite-magnetite-limonite.The deposits in large unproven areas within the dome share similar metallogenic geological setting with the known deposits.To rapidly evaluate the iron metallogenic background in the unproven areas,the low-altitude high-precision magnetic survey by trike is conducted on the basis of geological and remote sensing information,combined with the ground magnetic survey for verification.A total of 12 prediction areas are delineated,among which 4 are first-level prospecting targets as the main direction of next step.