都兰白石崖M20地区火山岩的地质-地球物理特征  

The geological & geophysical characteristics of the volcanic rocks in Baishiya M20 area,Dulan,Qinghai

作　　者：杨立功[1,2] 刘继顺[1,2] 尹利君[1,2] 刘卫明[1,2,3] 刘文恒[1,2] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,湖南长沙410083 [2]中南大学地球科学与信息物理学院,湖南长沙410083 [3]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《中国矿业》2013年第2期57-62,共6页China Mining Magazine

基　　金：国家115科技支撑计划:柴达木南北缘铜铅锌成矿规律及大型资源基地评价示范研究项目资助(编号:2006BAA01B06)

摘　　要：青海省都兰县白石崖地区铁多金属矿床,产于与火山机构有关的火成岩与石炭纪沉积岩的接触部位。因受第四系掩埋,整个地区的地质、地球化学、遥感特征不明显,只能依靠地球物理工作,查明隐伏火成岩及火山机构的分布状况,为资源勘查空间靶区的选定提供依据。经过对磁测数据的滤波、延拓、求导、小波分析、二级反演等方法的处理和电法卡尼亚电阻率Laplace及Salter行侦等突出异常体的变换,较好地划分了火山岩和火山机构的界限,确定了区内火山机构空间分布的地质-地球物理标志,并建立了区内理想状况下火山机构的地质-地球物理模型。The iron polymetallic deposit in Baishiya,Dulan,Qinghai,is located within the contact zone between Carboniferous sedimentary rocks and igneous rocks,related to the volcanic edifice.As the igneous rocks are buried by the Quaternary diluvial and wind piled sands,the characteristics of geology,geochemistry,and remote sensing in the whole region is not obvious,and only relying on geophysical work can we identify the distribution of concealed igneous rocks quickly,which provides information for the target selection of resource exploration.After dealing with the geophysical data by several methods,such as filtering,continuation,derivation,wavelet analysis and two class inversion,and having the prominent boundary of anomalous body like Cagniard resistivity＇s Laplace and Salter line detection transformed,then the boundary of the volcanic edifice and sedimentary rocks is found,and spatial distribution of geological-geophysical signs of the igneous rocks and the volcanic edifice is determined,and finally we established the geological-geophysical model of the volcanic-intrusive edifice under ideal conditions in the area.

关 键 词：火成岩 火山机构 高精度磁测 高频大地电磁测深 物探数据处理 

分 类 号：P631[天文地球—地质矿产勘探]