西藏尕尔穷铜金矿地球物理勘查模型  

Geophysical Exploration Model for Ga'erqiong Copper-Gold Deposit in Tibet

作　　者：白云[1,2] 陈毓川[3] 唐菊兴[3] 邓世林[2] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]四川省冶金地质勘查局六〇五大队,四川彭山610072 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《国土资源科技管理》2014年第5期85-90,共6页Scientific and Technological Management of Land and Resources

基　　金：国家973项目(2011CB403103);中央公益性行业专项项目(201011013-3)

摘　　要：尕尔穷铜金矿位于班公湖-怒江成矿带西段,是该成矿带西段第一个达到详查程度的大型规模的斑岩-矽卡岩型铜金矿床。采用V8工作站多功能电法仪,偶极-偶极装置,在矿区开展频谱激电测量(SIP),反演使用SFIPX-SWV 2.0软件中的2.5维反演。共测得从128Hz^32s的27个频点的视电阻率、视极化率,选取处理后的1s、32s视电阻率,(16s,1s)、(32s,2s)、(16s,2s)视极化率分别进行对比研究。在开展详细的岩、矿石物性研究的基础上,通过对A、B剖面的频谱激电测量,在A剖面北东端发现一个斑岩型矿体所特有的异常组合,具有内部中视电阻率中视极化率,中部低视电阻率高视极化率,外部高视电阻率低视极化率的特点,建立了地球物理勘查模型,为区域评价该类矿床提供思路。The skarn-type Ga＇ erqiong copper-gold deposit, located in the western Bang Gonghu-Nujiang metallogenic belt, is the first large-scale deposit there deserving detailed survey. SIP was measured by V8 System and dipole-dipole device, which was inversed through 2. 5D inversion of the SFIPX-SW V2. 0 software. Apparent chargeability and apparent resistivity of 27 frequency points were measured from 128Hz to 32s, of which ls and 32s apparent chargeability and （16s,1s）, （32s,2s）, （16s, 2s） apparent resistivity were compared and studied. Anormaly combination of porphyry orebody was found on a cross section of the north eastern by measuring SIP of the A and B cross section based on the detail survey of rock and ore physical property, which shows the characteristics of intermediate apparent chargeability and apparent resistivity on endozone and lower apparent chargeability and higher apparent chargeability on mesozone and higher apparent chargeability and lower apparent resistivity on exozone. The geophysical exploration model has been established, which will provide useful information for the regional assessment of this type of belt.

关 键 词：尕尔穷铜金矿 地质-地球物理特征 勘查模型 西藏 

分 类 号：P631[天文地球—地质矿产勘探]