摘要
随着找矿难度的加大,地质学科的发展,新理论、新技术的应用,成矿预测由单一信息预测转变为多元信息预测,定性预测转变为定性与定量结合,乃至定量预测。综合地质、物探、化探、遥感等多元信息,实现多元信息的定性分析、定量分析及综合是现代成矿预测的一个主流手段。
本论文以科研项目《云南勐兴铅锌矿床深部与外围立体定位预测与增储研究》为依托,以地理信息系统为平台,对地、物、化、遥等多元地学空间信息进行采集、存储、检索和分析,应用综合信息成矿预测理论,在矿区深部和外围探求新增资源储量,缓解矿山危机。云南勐兴铅锌矿建矿于1958年6月,是滇西南发现的规模较大的多金属硫化物矿床。经数十年的开采,矿山资源日趋枯竭。本次论文工作以综合信息成矿预测理论为指导,提取地、物、化、遥找矿信息,建立综合信息找矿模型,获得以下认识和成果:
1、勐兴铅锌矿为沉积—改造型矿床,其赋存明显受—定的层位控制,并在一定的构造部位富集成矿,矿液活化运移可能受到SN向断裂构造的控制;
2、建立多元地学信息数据库,实现了空间数据与属性数据的一体化管理,集地、物、化、遥为一体,快速提取和筛选找矿信息;
3、运用数字图像处理方法对ETM+遥感数据进行处理,并采用MORPAS软件系统对线性构造进行线性构造等密度、平均方位、条数、优益度、中心对称度定量化处理,提取矿化遥感信息。认为SN与EW交叉复合部位有利富矿体的形成的;
4、应用地球化学方法,在矿区西部发现Pb、Zn化探次生晕异常,该化探异常可能为含矿溶液沿构造裂隙扩散所致,具有一定的找矿空间;
5、通过对已知区进行地球物理特征研究后,开展未知区分析,在矿区共发现八个EH-4异常带,反映深部具有较好的矿化现象;
6、在总结成矿规律的基础上,综合地、物、化、遥找矿信息,建立矿区综合信息找矿模型,圈定两个Ⅰ类靶区,两个Ⅱ类靶区和四个Ⅲ类靶区。并对Ⅰ_1和Ⅰ_2号靶区实施工程验证,共获取333类矿石量876312吨。
With the increasing difficulties of ore-prospecting, development of Geology and application of new theories and new technologies, forecast of ore-formation is changing from single geology information to multi-geology information. Fixed in quality transform into the combination of the fixed-quality and fixed-quantity, even the full form of fixed-quantity. Utilizing the information of Geology, Geophysics, Geochemistry and Remote-Sensing synthetically, it is a main research method of the current forecast of ore-formation to realize the analysis and comprehension of the fixed-quality and fixed-quantity currently.
This paper is sponsored by the project,Localization-prognosis and Research on the Deep and Surroundings of MengXing Lead-Zinc mine,YunNan Province. With the support of the software platform of GIS, collect,store,retrieve,analyse the spatial information of Geology,Geophysics,Geochemistry and remote sensing. Utilizing the comprehensive information ore-formation prognosis,investigate new resources at the deep and surroundings of this mine and relieve the crisis.MengXing lead-zinc mine was established in June 1958,it's a large deposit of poly-metal sulfide.But the resource is drying up by the mining since 1958.This paper obtain some cognition and achievements,as follows:
1. MengXing lead-zinc mine is a reworked sedimentary deposit.Geologic strata controls the orebody apparently. SN-trending fracture may control the movement of hydrothermal fluid.
2.Building the multi-source geo-information database,accomplish the management of spatial data and attribute data, extract and filter ore-prospecting information quickly.
3.Process the ETM+ image by utilizing the digital image processing's methods,extract remote sensing mineralization and alteration information,interpret the line structure and ring structure. Acquisition a great deal of fixed-quantity information by means of MORPAS just as equi-density, average direction, item quantity, outstanding degrees,symmetry degree of centre.Summarize the prospecting model of remote sensing. We consider that the crossing of SN trending and EW trending is benefit to the formation of oreshoot.
4.Discover the abnormity of geochemical secondary halo in the western of MengXing syncline. Hydrothermal fluid diffuse through the structural flaw.And the abnormity may be related to the hydrothermal fluid. .There may be some places to find the ore-body.
5. Through the research on Geophysical characteristics in the known area, develop the analysis in the unknown area.There are eight abnormal belts in the mine field.They declare that there may be some ore-bodys under the ground.
6.Summarize the mineralization regularity by analyzing the ore controlling factors and ore-prospecting marks.Synthesize the ore-prospecting information of Geology, Geophysics, Geochemistry and Remote-Sensing,create the ore-prospecting model of comprehensive information minerogenic prognosis. Eight prospecting target areas are lined out. There are two target areas of class 1,two target areas of class 2 and four target areas of class 3.And 876,312 ton ore is found in target areas of I_1 and I_2 after the engineering testing.
引文
[1]赵鹏大,胡旺亮,李紫金.矿床统计预测.北京:地质出版社,1994
[2]肖克炎.特征分析模型简介.矿产与地质,1993,7(6):449-453
[3]肖克炎,张晓华,王四龙等.矿产资源GIS评价系统.北京:地质出版社,2000.3
[4]朱裕生,肖克炎等.成矿预测方法.北京:地质出版社,1997
[5]张均,陈守余,张玉香.隐伏矿体定位预测中的几个关键问题.贵金属地质,1998.7(4):293-301
[6]董树文,赵逊,张彦英等.21世纪地质科学展望-31届国际地质大会学术启示.地球学报,2001,22(1):1-4
[7]陈毓川,张之一,项礼文等.90年代地球科学的动向-第30届国际地质大会学术报导.北京:地质出版社,1997.155-159
[8]池顺都,赵鹏大.应用GIS圈定找矿可行地段和有利地段.地球科学,1998,23(2):125-128
[9]赵鹏大,陈永清.地质异常矿体定位的基本途径.地球科学,1998,23(2):111-114.
[10]范永香.初论内生金属矿床矿区地质预测的主要途径.地球科学,1984,(4):107-115.
[11]刘志国,池顺都,周顺平.成矿预测中应用GIS的主要步骤.地质找矿论丛,2002,17(2):140-144.
[12]程裕琪,陈毓川.再论矿床成矿系列问题.中国地质科学院院刊,1993
[13]陈毓川.中国大型、超大型矿床基本特征,第五届全国矿床会议论文集,北京,地质出版社,1993:164-165
[14]陈毓川.中国矿床成矿系列,第五届全国矿床会议论文集,北京,地质出版社,1993:89-91
[15]陈毓川,朱裕生.中国矿床成矿模式.北京:地质出版社,1993
[16]於崇文.成矿动力系统在混沌边缘分形生长一种新的成矿理论与方法论.地学前缘,2001,8(3):10-28
[17]陈国达,黄瑞华.大地构造成矿学.地球科学进展,1991,6(2):60-62.
[18]R.H.Sibson.Fault rocks and fault mechanism.J.Geo.Sec-London.1990 Vol.133.p3
[19]李文华.龙陵勐兴铅锌矿的沉积作用.云南地质,1985,(3):270-275
[20]罗鉴凡,廖忠.瞬变电磁法、时间域激电法在勐兴铅锌矿的应用.云南地质,2002,(4):421-427
[21]李志群,陈耀光,张泰身等.云南勐糯铅锌矿的成矿地质特征和资源接替.地质找矿论丛,2005,20(2):123-126
[22]阁积惠,康慧,陈怀亮.TM图像地质应用原理与方法.北京:冶金工业出版社,1995
[23]李冬田.地质遥感.北京:水利电力出版社,1995
[24]朱亮瑛,刘允良,张福祥等.遥感地质学.北京:地质出版社,1994
[25]刘勇卫,贺雪鸿译.遥感精解.北京:测绘出版社,1993
[26]党安荣,王晓栋,陈晓峰等.ERDAS IMAGIEE遥感图像处理方法.北京:清华出版社
[27]常庆瑞,蒋平安,周勇等.遥感技术导论.北京:科学技术出版社,2004
[28]汤国安,张顺友,刘咏梅等.遥感数字图像处理.北京:科学技术出版社,2004
[29]刘燕君.遥感找矿的原理和方法.北京:冶金工业出版社,1991
[30]罗富生.金矿床遥感影像模式及证据权重法在找矿预测中的应用.国土资源遥感,1994,(1):65-69
[31]A.P.Crosta,Mc.M.Moore.1989Proceedings of the 7th(ERIM)Thematic Conference Remote Sensing for Exploration Geology,Oct.,2-6,1173-1181
[32]Zeng Z Y.Fully Automatic Mapping for Vegetation and Soil Erosion Monitoring Using Remote Sensing,Mathematic Modeling and GIS Techniques.Proceedings of the 20th International cartographic continence:Mapping the 21st century.2001:702-709
[33]杨世瑜.矿床遥感地质的基本问题.西南矿产地质,1995,280,(2):133-135
[34]杨世瑜.论遥感图像的影像线-环结构.西南矿产地质,1997,32(5):33-35
[35]杨世瑜,王瑞雪.矿床遥感地质问题.昆明:云南大学出版社,2003
[36]F.R Agterberg,G.F.Bonham etc.Computer Application in Resource Estimation Prediction and Assessment for Metals and petroleum.Pergamon Press,1990
[37]Knox-Robinson,Towards a holistic exploration Strategy:Using Geographic Information Systems as a tool toenhance exploration,Australian Journal of Earth Sciences 1997
[38]Kurte E B,Robert W.A Review and Conceptual Framework of autoomated Map Generalization.Int Geographical Information System,1988,2(3):229-244
[39]Bonham-CarterG.F.,Geographic Information Systems for Geoscientists:Modelling with GIS,Elsevier Science Press,U.S.A,1994
[40]Bonham-carter,G,G,Geographic Information systems and the Analysis of Mineral Exploration Datasets,SilverAnniversary Meeting of International Assosiation for Mathematical Geology,1993
[41]Lesley Wyborm.Using GIS for Minerd Potential Evaluation in Areas with Few known Mineral Occurences.Second National Forum on GIS in the Geosciences,1995
[42]Cook,D.R.,The Evolution of Mineral Exploration Technology-Past,Present,and Future,Integrated Methods in Explomuon and Discovery,1993
[43]罗朝舜,赵志芳,许东等.成矿区带(矿田)赋矿遥感模型.云南地质,2004,23(3):378-384
[44]赵鹏大,池顺都.当今矿产勘查问题的思考.地球科学—中国地质大学学报,1998,23(1):70-74
[45]陈毓川.当代矿产资源勘查评价的理论与方法.北京:地震出版社.1999
[46]黄旭钊.利用MAPINFO综合分析多源地学信息进行矿产预测.地球科学-中国地质大学学报,2001,26(2):189-191
[47]王世称,王於天.综合信息解译原理与矿产预测图编制方法.长春:吉林大学出版社,1989
[48]王世称,陈永良,夏立显.综合信息矿产预测理论与方法.北京:科学出版社,2000
[49]朱裕生.矿产资源评价方法导论.北京:地质出版社,1984
[50]李建成.矿产资源定量预测方法综述.地质科技情报,1995,14(4):57-64
[51]国家辉.桂西北超微粒浸染型金矿成矿地质条件及找矿模式.广西地质,1994,7(2):37-49
[52]肖克炎.试论综合找矿模型.地质与勘探,1994,30(1):41-45
[53]王全明,方一平.矿产资源调查评价中的GIS.中国地质,2001,28(4):38-44
[54]卢作祥,范永香,刘辅臣.成矿规律和成矿预测学.武汉:中国地质大学出版社.1988
[55]吴堑虹.利用GIS编制矿产预测图.地质与勘探,2000,36(3):48-50.
[56]高建国.个旧矿区龙树脚矿段综合信息成矿预测与资源合理开发利用.昆明:云南科技出版社,2004.
[57]高建国,郭君.矿产资源信息系统构建及应用.昆明:云南科技出版社,2007