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现代地质 ›› 2010, Vol. 24 ›› Issue (2): 383-391.

• 地球物理及遥感技术 • 上一篇    下一篇

新疆哈密葫芦岩浆Cu-Ni矿勘查地球物理异常特征

邵行来1,2,3,薛春纪1,戴德文3,4,严育通1,2   

  1. 1.中国地质大学 地质过程与矿产资源国家重点实验室,北京100083;     2.中国地质大学 地球科学与资源学院,北京100083;
    3.新疆维吾尔自治区人民政府国家305项目办公室,新疆 乌鲁木齐830000; 4.新疆有色地勘局 物探大队,新疆 乌鲁木齐830000
  • 出版日期:2010-04-20 发布日期:2010-05-10
  • 通讯作者: 薛春纪,男,教授,博士生导师,1962年出生,矿产普查与勘探专业,主要从事矿床学、矿产普查与勘探相关教学和研究工作。
  • 作者简介:薛春纪,男,教授,博士生导师,1962年出生,矿产普查与勘探专业,主要从事矿床学、矿产普查与勘探相关教学和研究工作。Email:chunji.xue@cugb.edu.cn
  • 基金资助:

    国家科技支撑计划项目(2006BAB07B01-02,2007BAB25B05);中国地质大学(北京)长江学者和创新团队发展计划项目(IRT0755);中国地质大学(北京)高等学校学科创新引智计划项目(B07011);中国地质大学(北京)地质过程与矿产资源国家重点实验室开放基金项目(GPRM200832).

Characteristics of Geophysical Anomalies of the Prospecting for Hulu Magmatic Cu-Ni Deposit in Hami of Xinjiang

 SHAO Xing-Lai1,2,3, XUE  Chun-Ji1, DAI  De-Wen3,4, YAN  Yu-Tong1,2   

  • Online:2010-04-20 Published:2010-05-10

摘要:

新疆哈密葫芦岩浆Cu-Ni矿处在土墩—黄山—镜儿泉—图拉尔根镁铁-超镁铁杂岩带的东部,矿区出露石炭系上统梧桐窝子组变质火山岩地层,橄榄岩、辉橄岩多见,是这个带上典型的镁铁-超镁铁岩型硫化物矿床。研究总结矿区勘查地球物理异常特征有助于深化整个杂岩带Cu-Ni矿勘查。根据新近在矿区开展的1∶5 000高精度磁法和瞬变电磁测深成果以及前人的激电剖面成果,将各种方法探测的异常与葫芦岩体和矿体的位置进行对比,发现葫芦岩体对应的是中高磁性、高极化率和中低电阻率异常组合;ΔT一般在500 nT以上,ηa大于6%,ρa小于200 Ω·m,是这个带上寻找这类含矿岩体的重要标志。根据钻探结果,在立体空间分析了这3种异常的成因和与矿体的关系,指出更低的低阻异常并不一定是矿体的反应。

Abstract:

 Hulu magmatic Cu-Ni deposit in Hami of Xinjiang is located at the eastern Tudun-Huangshan-Jingerquan-Tulaergen mafic-ultramafic complex suite. The deposit with an outcrop of Upper Carboniferous Wutongyaozi formation is a typical mafic-ultramafic sulfide deposit. It is very helpful for the deposit exploration in the whole complex suite to study and summarize the characteristics of geophysical anomalies. According to the results from the 1∶5,000 ground magnetic survey and 1∶5,000 transient electromagnetic sounding profiling that we have obtained recently, and the IP that other researchers have already studied, it is revealed that the deposit was in the place with anomalies of high magnetism, high polarizability and low resistivity. The values of ΔT, ηa and ρa were above 500 nT, above 6% and below 200 Ω·m,respectively. These data were significant information for finding potential prospecting areas. Based on the drilling results, this paper also discussed the genesis of the anomalies and the relation between anomalies and deposit in the threedimensional space. Finally, it was found that much lower resistivity anomalies were not definitely caused by reactions of the deposit.

Key words: geophysical prospecting;transient electromagnetic method, CuNi deposit;Hulu magmatic rock body, Hami, Xinjiang

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