摘要
以东天山土屋-延东斑岩铜矿床找矿预测为例,首次应用地理信息系统(GIS),查明该区地质和地球化学的找矿标志。在各类异常找矿有利度分析的基础上,确定了用于预测找矿有利地段的异常组合,即Ag、Cu、Au、Mo等元素含量异常的叠加,以及数值区间的界线,并根据异常含量均值和方差的关系((?)+2δ,(?)+δ,(?))将预测区分为3个级别的异常地段。结合含矿地层、控矿构造和成矿母岩-岩浆岩等有利成矿因素空间分布的特征,最终圈定出找矿可行地段、找矿有利地段及潜在资源地段,并对东天山土屋-延东斑岩铜矿区的远景矿体地段进行了预测。
This paper takes ore-finding forecast in Tuwu - Yandong porphyry copper deposit in Eastern Tianshan Mountain as an example, we apply primarily Geography Information System （GIS） to find out ore-finding indicators the regional geology and geochemical anomalies. Based on various beneficial degree analysis of abnormality ore - finding, confirms the anormaly combination, e. g. telescoped content anormalies of Cu,Au ,Mo,Ag, and number interval used in forecasting preferable ore -finding area, i. e. according to relations of the mean and standard deviation of anormaly contents （x^-＋2σ,x^- ＋σ,x^-） ,the prediction region was divided into 3 ranks of anormaly areas. In characteristics of spatial distributions of beneficial metallogenic factors, such as are - bearing formarion strata, metallogenic fault zones and mother rock （igneous rock）, permissible ore -finding areas preferable ore -finding areas and potential mineral resource areas were finally delineated, and the perspective ore body areas in Tuwu - Yandong porphyry copper region were predicted and assessed. As companed with traditional are - finding methods, GIS supplies quantitative prediction model to forecast minerogenetic prospect, and its predicted results are more important to directives sense.
出处
《干旱区地理》
CSCD
北大核心
2007年第1期77-83,共7页
Arid Land Geography
基金
新疆自治区高校重点项目"GIS技术在东天山斑岩型铜矿预测中的应用"(XJEDU2006I06)
新疆大学博士启动基金
新疆维吾尔自治区重点学科(矿产普查与勘探)联合资助
关键词
地理信息系统
斑岩铜矿
矿产资源预测
东天山土屋-延东地区
Geography Information System
porphyry copper
forecast of mineral resource
Tuwu - Yandong area
Eastern Tianshan Mountain
