【作者】 周永恒；

【导师】 李守义；

【作者基本信息】 吉林大学 ， 矿产普查与勘探， 2011， 博士

【摘要】 辽东是我国重要的硼矿产地,硼矿床赋存于古元古界变质岩系中,在区内自西向东沿营口-凤城-宽甸一线呈带状分布。该区域的硼矿赋存于辽吉裂谷内,区域地质构造复杂,变质变形作用十分明显,成矿地质条件优越,是我国硼矿的主要分布地区,也是硼矿找矿的有利地段,硼矿是该区域的优势矿种。本文在工作区利用综合信息矿产预测原理系统建立地质、物探、化探综合解译空间信息库和图库的基础上,建立了综合信息找矿模型及预测模型,并在计算机上全方位及全过程地完成硼床密集区的靶区定位和定量评价,取得以下应用研究成果:（1）本文通过对辽东地区硼矿的成矿地质背景、硼矿蕴矿层特征、典型矿床特征和辽东硼矿矿床特征等进行分析研究,结合近年来辽东地区硼矿矿床成因的研究成果,认为辽东地区的硼矿属于热水喷流沉积变质型矿床。（2）通过分析工作区内37种地球化学元素的统计参数特征,结果表明,在工作区内,硼元素具有强浓集、强富集和强离散的特征,反映出硼元素在工作区内的高背景特征和较好的成矿物质基础;通过使用多种多元统计方法分析硼元素和其他36种元素的关系,结果表明:该区硼元素主要与Co、F、Sn、W、Y、Fe₂O₃、MgO关系密切;以B元素为主,利用叠置分析的方法研究8种与成矿关系密切元素的空间关系,将其分为四种地球化学异常组合:分别为硼-镁型组合元素异常、硼-镁-铁型组合元素异常、硼复合型和简单型组合元素异常;其中B-MgO型组合异常和B-MgO-Fe₂O₃型组合异常与硼矿化具有一定的对应关系。（3）通过分析工作区内岩（矿）石的物性资料,对工作区内岩石地层的物性特征形成基本认识,以此为基础,结合物探资料的应用目的,确定工作区内物探资料的处理方法及解释原则,并对解释的结果进行了论述。（4）在典型矿床及区域成矿规律研究的基础上,建立了辽东地区的硼矿综合信息找矿模型,使用地质单元法圈定统计单元75个,其中已知有矿单元19个,无矿单元56个,并购置、转换和提取变量。（5）通过使用特征分析法、聚类分析法和数量化Ⅳ等3种方法综合分析,将辽东地区的硼矿统计单元的成矿可能性划分为A、B、C、D四级,其中D级统计单元的成矿可能性最小,予以删除。最终,获得A级预测区5处,B级预测区20处。（6）使用逻辑信息法建立辽东地区硼矿资源的定量预测模型,经19个有矿单元检验,准确率达92.3%,模型准确可靠,通过使用逻辑信息法进行资源量预测,共计算新增资源量3242.69万吨。（7）含矿地质体体积参数估算法是全国矿产资源潜力评价项目于2010年确定使用的一种定量预测的新方法,在辽东地区使用含矿地质体体积参数估算法进行资源量的估算,共获得新增资源量3345.96万吨。（8）本文首次应用地球化学块体理论解决非金属的矿产资源评价问题,并对地球化学块体资源评价法做如下改进:通过各级地球化学块体与已知矿化进行对比分析确定了远景区的划分方法;通过引入面硼量密度、异常强度、块体结构、远景区面积等概念结合谱系图实现了远景区的筛选和定位预测;通过引入成矿概率（富集因素）,使得基于物质基础的地球化学块体法的定量预测更符合实际。最终使地球化学块体资源评价法形成了集区域总量预测、统计单元划分、单元的定位预测和单元的定量预测于一体的预测体系。利用地球化学块体理论研究辽东地区大约2万km²硼元素1:20万图幅化探数据,圈定硼地球化学块体3处,地球化学异常2处,共算得工作区内有4145.93万吨的硼矿总量资源潜力;通过对工作区内硼地球化学块体特征及硼矿产资源特征进行了系统研究,确定5级地球化学子块体作为评价远景区;并提出远景区的含矿性与块体的面积、面金属密度、异常强度及块体套合层次密切相关,结合地球化学块体谱系树对远景区进行筛选,共划分9个硼有利的成矿远景区,其中A级远景区4个,分别为Ⅲ111-2、Ⅲ112-1、Ⅳ111-1和Ⅴ111-1号远景区;在充分研究地质背景因素的基础上,认为地层、构造等富集因素与成矿物质基础是矿床形成的两个必要条件,因此,在资源量预测的工作中,还应考虑富集因素的影响,据此建立了找矿概率-地球化学块体法,并将其应用于辽东裂谷硼资源量的定量评价中,经找矿概率-地球化学块体法对15个预测远景区共求得新增资源量2738.17万吨。（9）结合多种定量评价方法分析,各种方法预测的资源量结果相差不大,从另一方面也说明了各个定量预测方法的有效性,经综合分析,可以认为辽东地区的资源潜力规模为3345.96万吨。结果表明,辽东地区硼矿资源潜力较大并符合客观实际。（10）综合定位预测和定量预测成果,形成辽东地区的勘查部署分级,共获得Ⅰ+级远景区3处,Ⅰ级远景区8处,为未来的硼矿找矿工作指明了方向。更多还原

【Abstract】 The eastern Liaoning provinces constitute an important borate deposits resource area,in which borate deposits are distributed in Paleoproterozoic strata as a zone from west Yingkou to east Fengcheng,Kuandian.Boron occurs of the region within in the Liaoning-Jilin rift,geological structure in the area is complex,the deterioration distortion function is obvious, the geological condition of mineralizing is superior,Boron in China is mainly distributed in the region, the region is looking for favorable areas for boron ,besides, the borate deposits is the superiority ore to plant.Based on the establishment of comprehensive interpretation spatial database and the map base of geology,physical exploration, geochemical exploration by utilizing the prediction system of the comprehensive information mineral resources in the study zone, a comprehensive information prospecting model and a forecasting model of prospecting comprehensive were established. The location and quantitative assessment was carried out in the target region of borate mineral resources concentration region with computers. The following is the Production of the applied research:（1）By studying geological background of boron,ore-bearing strata characteristics of boron,typical deposit characteristics of boron,deposit characteristics of boron in the Liaodong area.Combining the latest research results of boron ore genesis in the Liaodong area. That the boron is metamorphosed sedimentary exhalative deposits.（2） By analyzing the characteristics statistical parameters of 37 geochemical elements in the work area,the results show that,characteristics of boron is strong concentration, strong accumulation and strong discrete,boron reflected with high background characteristics and better basis for mineralization in the work area;By using multivariate statistical methods, analysis of the relationship between boron and other elements,the results show that,Boron is closely related with the Co、F、Sn、W、Y、Fe₂O₃、MgO in the work area;The B element as the main element, using overlay analysis method to study spatial relationships of seven elements and B elements,they were divided into four geochemical composition, respectively:the element composite anomaly of B-MgO;the element composite anomaly of B-MgO-Fe₂O₃:the simple element composite anomaly;the complex element composite anomaly;The element composite anomaly of B-MgO and the element composite anomaly of B-MgO-Fe₂O₃ has certain relationship with boron mineralization.（3）By analyzing the rock （ore） physical properties data in the work area,understand the physical properties of rock and formation. Combined with the application purpose of geophysical data,determine the principles of interpretation and the treatment methods of geophysical data in the work area,And discusses the interpretation of the results.（4）In typical deposit of research and regional metallogenic regularity based on,Established the prospecting model of integrated information of boron in the Liaodong area,Use geological unit method to draw statistical unit 75. In these units, 19 units containing minerals, 56 unit is not mineral. And the acquisition, conversion and extraction variables.（5）Using the characteristic analysis, the quantification theory IV and the Q cluster analysis to analyze the mineralization probability of statistical unit,them into A, B, C, D four grades. D-level statistical probability is the smallest unit of mineralization, and to discard it. Finally, we get A-level statistical unit 5, B-level statistics unit 20.（6）Using the method of logical information, establishment the quantitative prediction model of boron resources in eastern Liaoning, Detection of the 19 test units using this model, Accuracy rate was 92.3%, this shows that the model is reliable. By using the method of logical information forecasting resources, The result is the amount of 32,426,900 tons of additional resources in the Liaodong area.（7）In the next section the author use the Volume method of estimating parameters of ore-bearing geological to set up the quantitative prediction model. finally using the method calculate the amount of resources 33,459,600 tons. This method is the potential for mineral resources assessment project in 2010 to determine the use of a quantitative prediction of the new method.（8） This is the first application of geochemical block theory to solve the problem of non-metallic mineral resource estimation, and improve the evaluation of mineral resources based on geochemical block. Through the various geochemical blocks were compared with the known mineralization to determine the partition method of prospective areas; By introducing the surface boron density, abnormal strength, block structure, the vision of the concepts of area, with pedigree chart, Screening of the prospect area and location prediction; By introducing the probability of mineralization （enrichment factor）, so based on the material basis of geochemical blocks more scientific method of quantitative prediction. Ultimately the evaluation of mineral resources based on geochemical block has a total area forecasting, statistical unit, the positioning unit forecast and unit quantitative predictions.Through researching 1:200000 map sheet geochemical datas on B in about 20000 km² region of East of Liaoning by using geochemical Block Theory, we delineated 3 geochemical blocks and 2 geochemical anomalies. Calculate the amount of 41,459,300 tons of resources.Through systematically searching the characteristic s of geochemical blocks in study area and the characteristic of boron deposit, we determined 5-grade geochemical sub-volume as prospective area, and we thought the ore potentiality of prospective area were relative with the block area,the surface metal density,the anomaly intensity and the overlap level of block. Divided favorable metallogenic perspective areas 9. We divided 4 A level prospective areas, includingⅢ111-2、Ⅲ112-1、Ⅳ111-1 andⅤ111-1.On the foundation of research geological background, we think the enrichment factors, such as formation and structure, and the ore-forming material base are the two necessary conditions. So in the course of calculation to resource extent, we should think about the influences of them. Finally, we set up the ore prospecting probability-geochemical block ore prospecting method, and use it to quantitatively assess the amount of B ore in Liaodong rift. Calculate the amount of 27,381,700 tons of resources（vision district 15, minus the amount of proven resources）.（9）Comparing prediction results of quantitative forecasting methods, they have little difference. This shows the validity of the quantitative prediction. Comprehensive analysis, that the scale of resource potential is 33,459,600 tons in the Liaodong area. The results show that the large resource potential of boron in eastern Liaoning and With objective reality.（10）Comprehensive analysis of location prediction results and results of quantitative prediction, formed a survey deployment classification in the Liaodong area.Ⅰ+ level were obtained three prospective areas,Ⅰlevel prospect area 8. It pointed out the future direction of prospecting work of boron.更多还原