山东招平断裂带及其外围地区遥感蚀变提取与找矿预测  

Extraction of Remote Sensing Alteration And Ore Prediction in Zhaoping Fault Belt And Its Periphery,Shandong Province

作　　者：李守生 叶珂 杨斌[2] 王慧 张建国[2] 

机构地区：[1]山东招金集团,山东招远265400 [2]中南大学地学与环境工程学院,长沙410083

出　　处：《矿产与地质》2011年第3期231-235,共5页Mineral Resources and Geology

基　　金：国家科技支撑计划课题(编号:2006BAB01B07);有色金属成矿预测教育部重点实验室资助

摘　　要：招平断裂带是胶东地区重要的控矿构造之一,文章中遥感地质研究的范围包括其北段、中段及外围区,测区面积1200km2。ETM多光谱遥感数据来源于美国7号陆地卫星。选择ETM7、4、1三个波段进行彩色合成制作测区基础遥感图像。采用Crosta法,选择ETM1、4、5、7波段作为输入波段进行主成分变换,获取泥化蚀变遥感信息。选择ETM1、3、4、5波段进行主成分变换,提取铁化蚀变信息。沿招平断裂带在玲珑、大尹格庄、蒋家窑、夏甸等矿田(床)发育规模大、连续性好的泥化蚀变。在招平断裂带下盘玲珑型花岗岩出露区域泥化蚀变较发育。铁化蚀变主要分布在测区南部和中部,在招平断裂带上盘胶东群和荆山群变质岩系出露地区铁化蚀变规模较大,连续性较好。根据遥感泥化蚀变和铁化蚀变的空间分布、规模和连续性,结合金矿点、断裂和出露地质体等因素的地质分析,共圈定找矿靶区12处,按成矿条件的有利性和找矿潜力分为Ⅰ、Ⅱ、Ⅲ三级。Zhaoping faulted zone is an important ore-controlling structure in eastern Shandong province.The surveying areas of remote sensing geology include the fault belt's central and north sections in a range of 1200km2 area.The ETM multispectral remote-sensing data came from Landsat 7 of USA.The basic remote sensing images were made by pseud colour composing of ETM 7,4,1 bands.The argilation alteration was obtained by Crosta method on principal component transform of ETM 1,4,5,7 bands.The iron alteration was obtained by Crosta method on principal component transform of ETM 1,4,5,7 bands.There are large scale and consecutive argilation alteration in the deposits along Zhaoping fault belt,such as Linglong,Dayingezhuang,Jiangjiayao,Xiadian.And argilation alteration often appears in the footwall of Zhaoping fault belt where there are cropping-out of Linglong granite.The iron alteration is distributed mainly in south and middle part of the surveying area,and there are large scale and consecutive alteration in the hanging wall of Zhaoping fault belt where metamorphic rocks of Jiaodong group and Jingshan group occur.12 prospecting targets were delimitated according to the distribution,scope,continuity of argilation and iron alteration and to the geological analysis of gold deposits,fractures,visible geologic bodies.The prospecting targets were classified into 3 groups of Ⅰ、Ⅱ、Ⅲ based on the mineralization conditions and the ore-forming potential.

关 键 词：遥感蚀变 找矿预测 金矿床 招平断裂带 胶东 

分 类 号：P5[天文地球—地质学]