摘要
沱沱河地区位于三江多金属成矿带的北西段,在总结该区成矿规律的基础上,使用GIS平台提取地层、构造、岩浆岩、重力、航磁、化探异常找矿信息,并利用地层、构造信息分析了地层组合熵、断裂频数、构造优益度,利用航磁资料推断隐伏岩体,利用遥感资料提取铁染和羟基蚀变信息对该区进行研究。在此基础上,建立了铜矿的预测模型,采用MRAS系统中的证据权模块进行预测。本次研究按照后验概率大小划分了三级成矿远景区,共圈定了八个I级、十一个II级和十五个Ⅲ级成矿远景区(其中五个Ⅰ级、六个Ⅱ级和十个Ⅲ级远景区目前尚未发现铜矿床(点))。由于这些远景区具有与已知矿床(点)相近的成矿条件,因此是今后有望实现重大找矿突破的地区,应予充分重视。本次研究数据扎实,结论可靠,可指导该区进一步的找矿勘查工作。
Tuotuo river region is located in southwest Qinghai Province,China.It lies in one of the most important metallogenic belts in China.In this research,the multisource data sets,including geological,geochemical,geophysical,and remote sensing data,were integrated for mineral potential analysis with GIS technology.Under the guidance of regional metallogenic features and ore-forming geoanomaly theories,diagnostic deposit recognition layers were obtained from these data sets,which were combined to calculate weights for each layer and to identify the posterior probabilities for each cell of the study area under Weights of Evidence module of the application MRAS.Due to the belts′ similar metallogenic conditions with the known copper deposits,they form the most promising zones with considerable attracting deposits,deserving more attention in future metal mineral exploration.The research has been conducted on the basis of sound multisource data followed by reliable and helpful results,which are of great guiding significance for further copper exploration in this region.
出处
《物探化探计算技术》
CAS
CSCD
2010年第4期408-416,共9页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家"十一五"科技支撑课题资助(006BAB01A08)
关键词
三江北段
沱沱河
GIS
证据权重法
铜
成矿预测
sanjiang metallogenic belt
Tuotuo river
GIS
weights of evidence
copper
minerogenetic prediction
