东昆仑成矿带某隐伏矿激电响应特征及成矿预测
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摘要
在青藏高原高寒区对东昆仑矿集区某斑岩型铜铁矿利用激电数据进行了快速评价及成矿预测。利用先平面后剖面的地质工作方法:首先通过中间梯度法装置进行了平面测量,数据利用距离加权反比插值法进行了插值绘图;接着利用对称四极装置测深法进行了典型剖面的测量,数据采用有限单元法进行了正演模型构造与拟合计算,数据拟合误差幅频率达到0.58%,电阻率达到6.6%,清楚地划分了含矿异常带和围岩的分布,最后钻探验证效果明显。文章提及的数据采集、处理解释方法和思路,为在交通不便、高寒矿集区的地质找矿快速评价工作提供了参考。
The IP survey was conducted for rapid assessment and metallogenic prediction in a porphyry type copper-iron deposit located in the eastern Kunlun metallogenic belt. Firstly middle-gradient IP method was applied for plane survey,then inverse distance weighting method was used for interpolation and the contour map was plotted. After that,IP sounding profile was conducted based on the analysis result of the survey data. Then,the finite element method was used in forward model construction and data fitting calculation. The fitting error of apparent frequency reached 0.58% and apparent resistivity reached 6.6%. The distribution of anomalous orebearing belt and surrounding rock was obviously outlined based on the data interpretation. The interpreted result was verified by the test drilling work,and the sounding prospecting result was achieved. The method used will provide reference for quick prospecting in the area with traffic inconvenience,high altitude and favorable mineralized information.
The IP survey was conducted for rapid assessment and metallogenic prediction in a porphyry type copper-iron deposit located in the eastern Kunlun metallogenic belt. Firstly middle-gradient IP method was applied for plane survey,then inverse distance weighting method was used for interpolation and the contour map was plotted. After that,IP sounding profile was conducted based on the analysis result of the survey data. Then,the finite element method was used in forward model construction and data fitting calculation. The fitting error of apparent frequency reached 0.58% and apparent resistivity reached 6.6%. The distribution of anomalous orebearing belt and surrounding rock was obviously outlined based on the data interpretation. The interpreted result was verified by the test drilling work,and the sounding prospecting result was achieved. The method used will provide reference for quick prospecting in the area with traffic inconvenience,high altitude and favorable mineralized information.
引文
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[4]潘彤,罗才让,伊有昌.青海省金属矿产成矿规律及成矿预测[M].北京:地质出版社,2006.
[5]薛培林,肖静,薛福林,等.青海祁漫塔格—都兰成矿带铜矿找矿前景初探[J].矿产与地质,2006,20(3):247-250.
[6]李金铭.激发极化法方法技术指南[M].北京:地质出版社,2004,6-8,15-16,21-43.
[7]王立群,刘国兴,韩江涛,金忠宝.大功率激电和CSAMT法在敦化团北地区查找锡钼矿的应用[J].吉林大学学报(地球科学版),2008,SI(6):1134-1140.
[8]Leucci,G.Integrated geophysical,geological and geomorphological surveys to study the coastal erosion[J].International Journal of Soil Science,2006,(1):146-167.
[9]Weijun Chen,Hongtao Liu,Jianming Liu.Integrated geophysical exploration for the Longtoushan Ag-Pb-Zn deposit in the southeast of the Da Xing’an Ling mountains,Inner Mongolia,northern China[J].Exploration Geophysics,2010,41(4):279-288.
[10]William K Mohanty,Animesh Mandal,S P Sharma,etal.Integrated geological and geophysical studies for delineation of chromite deposits:A case study from Tangarparha,Orissa,India[J].Geophysics,2011,76(5):B173-B185.
[11]Chen Wei-jun,Liu Hong-tao,Liu Jian-ming.Integrated geophysical exploration for the Long toushan Ag-Pb-Zn deposit in the southeast of the Da Xing an Ling mountains,Inner Mongolia,northern China[J].Exploration Geophysics,2010,41(4):279-288.
[12]靳国栋,刘衍聪,牛文杰.距离加权反比插值法和克里金插值法的比较[J].长春工业大学学报,2003,24(3):53-57.
[13]何继善.双频激电法[M].北京:高等教育出版社,2006:1-7.