云南个旧矿田大白岩测区多元异常信息找矿预测
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摘要
大白岩测区位于个旧矿田卡房矿区东部。该区找矿预测目标为产于印支期变火山岩内及其附近围岩中的似层状铜矿体和锡铜多金属矿体。根据测区内隐伏矿体埋深大和基岩出露好的特点,制定了构造地球化学—遥感蚀变信息—大地电磁测深多元信息找矿策略。测区地表发育Cu、Sn、As、Pb、Zn、Sb元素构造地球化学异常,结合多元统计分析,厘定隐伏铜矿的构造地球化学找矿标志为Cu-As元素组合异常及因子得分Y(i,3)异常,隐伏锡铜多金属矿的构造地球化学找矿标志为Sn-As-Sb元素组合异常及因子得分Y(i,1)与Y(i,2)异常;在试验剖面测量和岩石物性参数测试基础上,按200 m×100 m网度完成高频大地电磁测深剖面12条,探测深度1000 m,根据推断的变火山岩空间位置及低阻异常中心的分布,在剖面上圈定了找矿有利部位。结合地质及遥感铁化蚀变异常信息,圈定找矿靶位3处。其中,a1靶区经钻探工程首先验证,平均品位达到0.593%,已达到工业要求。
Dabaiyan survey area is located in the east of Kafang mining area in Gejiu orefield. Predicted prospecting targets within the survey area are the stratoid copper orebodies and Sn-Cu polymetal orebodies hosted in Indosinian metavolcanics and wall rocks nearby. With the characteristic of deeply bury of orebody and widely exposed outcrop,the prospecting strategy has been made on the basis of multi-information consisted of tectonic-geochemistry,remote sensing alteration information and magnetotelluric sounding. The tectonic-geochemical anomalies of Cu,Sn and As were found in surface of survey area,combined with multivariate statistical analysis,Cu-As association anomalies and factor score anomalies of Y( i,5) were determined as clues for hidden Cu ore bodies,while Sn-As-Sb association anomalies and factor score anomalies of Y( i,1) and Y( i,2) were determined as clues for hidden Sn-Cu polymetal ore bodies. On the basis of experimental section measurements and the test about physical characteristics of rock,12 plane sections for magnetotelluric sounding were finished at the depth of about 1000 m with the grid of 200 m× 100 m. The favourable ore-forming positions were delineated on the sections in accordance with the deductive position of metavolcanics and the distribution of the centre of lowresistance anomalies.Three prospecting targets were delineated based on the information of geology and remote sensing alteration. Among them,a1 has been proved by drilling. The average grade was Cu 0.593%,as much as the industrial grade required.
Dabaiyan survey area is located in the east of Kafang mining area in Gejiu orefield. Predicted prospecting targets within the survey area are the stratoid copper orebodies and Sn-Cu polymetal orebodies hosted in Indosinian metavolcanics and wall rocks nearby. With the characteristic of deeply bury of orebody and widely exposed outcrop,the prospecting strategy has been made on the basis of multi-information consisted of tectonic-geochemistry,remote sensing alteration information and magnetotelluric sounding. The tectonic-geochemical anomalies of Cu,Sn and As were found in surface of survey area,combined with multivariate statistical analysis,Cu-As association anomalies and factor score anomalies of Y( i,5) were determined as clues for hidden Cu ore bodies,while Sn-As-Sb association anomalies and factor score anomalies of Y( i,1) and Y( i,2) were determined as clues for hidden Sn-Cu polymetal ore bodies. On the basis of experimental section measurements and the test about physical characteristics of rock,12 plane sections for magnetotelluric sounding were finished at the depth of about 1000 m with the grid of 200 m× 100 m. The favourable ore-forming positions were delineated on the sections in accordance with the deductive position of metavolcanics and the distribution of the centre of lowresistance anomalies.Three prospecting targets were delineated based on the information of geology and remote sensing alteration. Among them,a1 has been proved by drilling. The average grade was Cu 0.593%,as much as the industrial grade required.
引文
[1]彭省临,欧阳恒,王力,等.个旧矿集区锡铜多金属多因复成成矿机制[J].矿床地质,2006,25(S1):263-366.
[2]刘明,彭省临,王力,等.个旧老—卡岩体接触—凹陷带锡—铜多金属矿地质特征及成因分析[J].矿产与地质,2007,21(4):395-403.
[3]蒋顺德,秦德先,邓明国.个旧锡矿芦塘坝矿段断裂构造地球化学特征及其找矿意义[J].矿产与地质,2006,20(6):677-681.
[4]李玉新,范柱国.个旧老厂锡多金属矿田陡石阶测区断裂构造地球化学异常特征[J].矿产与地质,2005,19(1):66-71.
[5]王力,孟昭君.构造地球化学方法在个旧锡矿外围找矿预测中的应用[J].矿床地质,2002,21(S1):1197-1120.
[6]周智,冯开平.综合物探法在个旧高松矿区深部找矿中的应用[J].云南地质,2012,31(3):354-359.
[7]高建国,念红良,李西,等.云南个旧南部地区综合找矿信息与成矿预测—以龙树脚矿段为例[J].地质与勘探,2005,41(2):64-71.
[8]张建东,彭省临,杨斌,等.个旧矿区遥感异常信息解译及找矿远景分析[J].地质与勘探,2008,44(2):87-91.
[9]唐从国,聂启祥,刘丛强,等.云南个旧矿区卡房矿田遥感地质综合信息成矿预测[J].矿物学报,2004,24(2):164-170.
[10]王世称.综合信息矿产预测理论与方法体系新进展[J].地质通报,2010,29(10):1399-1403.
[11]赵鹏大,陈永清.科学选靶的理论与途径[J].地球科学,2011,36(2):181-188.
[12]刘春学,秦德先,党玉涛,等.个旧锡矿高松矿田综合信息矿产预测[J].地球科学进展,2003,18(6):921-927.
[13]徐成彦,王豪,刘粤湘,等.构造分析、遥感、物化探方法综合研究腾冲—梁河锡成矿区的控矿构造及隐伏矿床预测[J].云南地质,1991,10(4):394-416.
[14]D Bonnefoy,C Braux,J Corpel,et al.Combined interpretation of remote sensing imagery and geological and geophysical data:Exploration for gold in southern Brittany,France[J].Advances in Space Research,1992,12(7):17-25.
[15]William R,Henkle Jr,Thomas W,et al.Geochemical and geophysical signatures at three precious metals exploration targets in Nevada[J].Journal of Geochemical Exploration,1993,47(1):29-43.
[16]李斌,邹海洋,杨牧,等.马来西亚吉兰丹州Ulu Sokor金矿地质特征及找矿方向[J].黄金科学技术,2010,18(4):17-21.
[17]邹光华.国外矿产勘查工作的动向[J].国外地质勘探技术,1993,(5):1-6.
[18]陈国达,黄瑞华.关于构造地球化学的几个问题[J].大地构造与成矿学,1984,8(1):7-18.
[19]王宝林,朱锁.遥感蚀变异常在地质矿产勘查工作中的应用[J].华南地质与矿产,2011,27(1):64-68.
[20]杨斌,高星,陈艳,等.招平断裂带大尹格庄—后仓段深部矿体定位预测[J].中国有色金属学报,2012,22(3):872-879.
[2]刘明,彭省临,王力,等.个旧老—卡岩体接触—凹陷带锡—铜多金属矿地质特征及成因分析[J].矿产与地质,2007,21(4):395-403.
[3]蒋顺德,秦德先,邓明国.个旧锡矿芦塘坝矿段断裂构造地球化学特征及其找矿意义[J].矿产与地质,2006,20(6):677-681.
[4]李玉新,范柱国.个旧老厂锡多金属矿田陡石阶测区断裂构造地球化学异常特征[J].矿产与地质,2005,19(1):66-71.
[5]王力,孟昭君.构造地球化学方法在个旧锡矿外围找矿预测中的应用[J].矿床地质,2002,21(S1):1197-1120.
[6]周智,冯开平.综合物探法在个旧高松矿区深部找矿中的应用[J].云南地质,2012,31(3):354-359.
[7]高建国,念红良,李西,等.云南个旧南部地区综合找矿信息与成矿预测—以龙树脚矿段为例[J].地质与勘探,2005,41(2):64-71.
[8]张建东,彭省临,杨斌,等.个旧矿区遥感异常信息解译及找矿远景分析[J].地质与勘探,2008,44(2):87-91.
[9]唐从国,聂启祥,刘丛强,等.云南个旧矿区卡房矿田遥感地质综合信息成矿预测[J].矿物学报,2004,24(2):164-170.
[10]王世称.综合信息矿产预测理论与方法体系新进展[J].地质通报,2010,29(10):1399-1403.
[11]赵鹏大,陈永清.科学选靶的理论与途径[J].地球科学,2011,36(2):181-188.
[12]刘春学,秦德先,党玉涛,等.个旧锡矿高松矿田综合信息矿产预测[J].地球科学进展,2003,18(6):921-927.
[13]徐成彦,王豪,刘粤湘,等.构造分析、遥感、物化探方法综合研究腾冲—梁河锡成矿区的控矿构造及隐伏矿床预测[J].云南地质,1991,10(4):394-416.
[14]D Bonnefoy,C Braux,J Corpel,et al.Combined interpretation of remote sensing imagery and geological and geophysical data:Exploration for gold in southern Brittany,France[J].Advances in Space Research,1992,12(7):17-25.
[15]William R,Henkle Jr,Thomas W,et al.Geochemical and geophysical signatures at three precious metals exploration targets in Nevada[J].Journal of Geochemical Exploration,1993,47(1):29-43.
[16]李斌,邹海洋,杨牧,等.马来西亚吉兰丹州Ulu Sokor金矿地质特征及找矿方向[J].黄金科学技术,2010,18(4):17-21.
[17]邹光华.国外矿产勘查工作的动向[J].国外地质勘探技术,1993,(5):1-6.
[18]陈国达,黄瑞华.关于构造地球化学的几个问题[J].大地构造与成矿学,1984,8(1):7-18.
[19]王宝林,朱锁.遥感蚀变异常在地质矿产勘查工作中的应用[J].华南地质与矿产,2011,27(1):64-68.
[20]杨斌,高星,陈艳,等.招平断裂带大尹格庄—后仓段深部矿体定位预测[J].中国有色金属学报,2012,22(3):872-879.