共查询到20条相似文献，搜索用时 15 毫秒
1.
新疆松湖铁矿床位于伊犁地块东北部,矿体赋存于下石炭统大哈拉军山组火山碎屑岩中．目前共圈定5个矿体,L1、L2出露,IJ3、L4、L5矿体隐伏,其中L1规模最大,也是该矿床主要矿体．矿床主要矿石矿物为磁铁矿,次为赤铁矿、黄铁矿和褐铁矿．矿石构造类型主要为浸染状、块状、角砾状和条带状构造．蚀变类型主要有绿帘石化、绿泥石化、阳起石化和钾长石化．矿床形成经历了隐爆一矿浆成矿期和热液成矿期2个阶段．该矿床成因类型属于受热液作用交代改造的火山岩型铁矿． 相似文献
2.
本文研究了1971—2015年世界铁矿石供需与流动格局的时空变化,结果显示：① 世界铁矿石年产量期末比期初增加了12.26亿t,年均增长2.17%;1992年以前,欧洲曾是世界铁矿石的消费重心,但随后亚洲后来居上。② 研究期内世界铁矿石输出量年均增长达3.7%,大洋洲和南美洲成为铁矿石的主要输出地,2015年占世界的比重分别达53.73%和26.23%;本世纪以来铁矿石输入量最大的是中国、日本和韩国,2015年分别占世界总量的65.07%、8.94%和5%。③ 基于“场”理论,采用位势、“源”、“汇”、迹线等概念审视全球铁矿石流场的基本特征和流场成因,发现世界铁矿石流动的“位势”北半球较低,而南半球较高;亚洲、欧洲是主要的汇流场,大洋洲、南美洲是主要的源流场。本文研究揭示了近半个世纪以来世界铁矿石资源的流动状态及其演变过程,对于我国科学地制定产业政策具有重要价值。 相似文献
3.
Yu Zhi Shi Xiuzhi Zhou Jian Chen Xin Miao Xiaohu Teng Bing Ipangelwa Timo 《Natural Resources Research》2020,29(2):843-865
Natural Resources Research - A large ore loss and dilution can be expected when using a pre-blast ore boundary for shovel guidance because of the movement and re-distribution of ore in the muck... 相似文献
4.
依据青海昆特依、马海两矿区固体钾镁盐矿物质成份、矿床规模、矿石品位、埋藏深度等地质条件和矿区自然经济地理条件、勘查程度及开发现状，进行了两矿区开发的经济远景评价。 相似文献
5.
马关都龙曼家寨锡锌多金属矿床经济评价研究 总被引：1，自引：0，他引：1
在对马关都龙曼家寨锡锌多金属矿床地质特征进行分析、研究的基础上,应用地质统计学的理论和方法,运用大型矿业专用软件Surpac建立了该矿体的原始资料数据库和三维数学模型.根据不同边界品位多方案圈定矿体,分别计算矿体的盈亏平衡品位、平均品位和综合品位.通过对比以平衡品位和综合品位圈定的矿体块体模型,对该矿床进行技术经济评价研究,得出了有利于矿产资源综合利用、减少资源浪费的以综合品位圈定矿体的结论. 相似文献
6.
7.
东昆仑迪木那里克铁矿地质特征与找矿标志 总被引：1，自引：0，他引：1
迪木那里克铁矿位于阿尔金大断裂南侧,矿体主要赋存于中-上奥陶统祁曼塔格群浅变质的碎屑岩-火山碎屑岩中.矿体多呈似层状、条带状产出,部分矿体塑性变形较强,矿体与地层产状基本一致,层控作用比较明显;矿石主要为条带状石英-磁铁矿和块状磁铁矿矿石;矿石品位较低（TFe=20%～40%）;围岩蚀变特征明显.该铁矿属沉积变质型铁矿... 相似文献
8.
经对硼氢化物的形成条件、内生硼矿物化学成分、矿物共生组合及盐湖卤水、热泉的有关物质浓度值研究后 ,认为硼氢化物是形成硼矿床的重要活化、迁移形式 相似文献
9.
针对氯化钾生产中不同类型的光卤石原矿,因其镁钾比和钠钾比失调,而影响浮选工艺的控制,使最终产品质量和收率低下,不能使原矿得到充分有效利用。通过原矿的掺兑可以改善原矿的组成结构,并可调整原矿镁钾比和钠钾比。比例掺兑后不仅使原矿得到有效回收和利用,也大幅度提高了最终产品氯化钾的质量和产量,在实际生产中具有积极的推动作用。 相似文献
10.
11.
《阿尔金山及羌塘高原水资源开发利用与保护考察报告》编写组 《干旱区地理》2007,30(6):785-790
阿尔金山水资源相对丰富,是巴音郭楞蒙古自治州河川径流的主要形成区之一,巴音郭楞蒙古自治州若羌县罗布泊镇钾盐贮量很大,经济效益可观,但水资源成为了罗布泊钾盐矿发展的限制性因素。能否把阿尔金山的水资源作为罗布泊钾盐矿发展的支撑,是我们必须回答的一个问题。本文利用新疆维吾尔自治区水利厅阿尔金山野外考察资料,分析阿尔金山的水系与湖泊、自然地理和社会经济特点,以期为探讨阿尔金山能否作为罗布泊钾盐矿开发的水源条件提供理论依据。 相似文献
12.
经遥感解译及地表调查,在罗布泊新庆台地罗北西3号断陷带内存在固体钾盐矿化带。为初步查明该断陷带钾盐矿化带的矿体赋存特征、矿物组分、矿石类型及矿体规模,开展了系统的坑探揭露、刻槽取样、盐矿鉴定、X射线衍射及化学分析测试等工作。经勘查,钾盐矿层赋存于洼地内第四系全新统化学沉积层中,呈似层状分布。面积约30 km2,矿层厚0.30～2.73 m,平均1.02 m。经X射线衍射及盐矿鉴定,矿石中含钾矿物以杂卤石为主,钾盐镁矾次之,局部见含光卤石,矿石中KCl含量在2.07%～8.44%,平均含量在3.55%。通过本次研究,确认该区存在一低品位固体钾盐矿床,初步查明了矿床地质特征,其成因为台地内的局部洼地汇水经蒸发作用沉积形成,为进一步的勘查及开发提供了地质依据。 相似文献
13.
In the mining industry, definitions of terms such as geologic resource, geologic reserve, mineral resource, mineral, mineral reserve, ore, ore reserve, mineable reserve, and industrial minerals always have been debated, and have caused much confusion. The process of arriving at these definitions requires complicated exploration, calculation, and evaluation. Based on such work, the definitions about the mineral property will be distinctly different. The aims of this paper is to discuss and compare these definitions, and then contrast the differences among them in the example of the Hasançelebi iron are deposit, which is an important source of iron ore in Turkey. 相似文献
14.
Ore value-tonnage diagrams for resource assessment 总被引：4，自引：0，他引：4
An ore value-tonnage diagram has been proposed for assessing mineral resources. Diagrams of W+Mo, and Pb+Zn deposits show
a good linearity between ore value and logarithms of cumulative ore tonnage. Diagrams of the massive sulfide, orthomagmatic,
placer, porphyry, replacement, and stratabound types are also linear. It is assumed, therefore, that deposits of each of these
commodities and these types belong to a single population. In contrast, the ore value-tonnage relations of all the deposits
analyzed here is approximated by the combination of two exponential functions. The same feature is seen for deposits of the
Cu+W+Mo, Cu+Pb+Zn, and Au+Ag commodities, and of the vein and unconformity-related types. This suggests that deposits belonging
to each of such categories are divided into the high and low value groups. We can expect, accordingly, to find high value
deposits of such categories. 相似文献
15.
Huang Jixian Mao Xiancheng Chen Jin Deng Hao Dick Jeffrey M. Liu Zhankun 《Natural Resources Research》2020,29(1):439-458
Exploring the spatial relationships between various geological features and mineralization is not only conducive to understanding the genesis of ore deposits but can also help to guide mineral exploration by providing predictive mineral maps. However, most current methods assume spatially constant determinants of mineralization and therefore have limited applicability to detecting possible spatially non-stationary relationships between the geological features and the mineralization. In this paper, the spatial variation between the distribution of mineralization and its determining factors is described for a case study in the Dingjiashan Pb–Zn deposit, China. A local regression modeling technique, geological weighted regression (GWR), was leveraged to study the spatial non-stationarity in the 3D geological space. First, ordinary least-squares (OLS) regression was applied, the redundancy and significance of the controlling factors were tested, and the spatial dependency in Zn and Pb ore grade measurements was confirmed. Second, GWR models with different kernel functions in 3D space were applied, and their results were compared to the OLS model. The results show a superior performance of GWR compared with OLS and a significant spatial non-stationarity in the determinants of ore grade. Third, a non-stationarity test was performed. The stationarity index and the Monte Carlo stationarity test demonstrate the non-stationarity of all the variables throughout the area. Finally, the influences of the degree of non-stationary of all controlling factors on mineralization are discussed. The existence of significant non-stationarity of mineral ore determinants in 3D space opens up an exciting avenue for research into the prediction of underground ore bodies.
相似文献16.
Strujkov Sergey F. Chizhova Irina A. Konstantinov Michael M. 《Natural Resources Research》1999,8(4):315-343
The Okhotsk–Chuckchee volcanic belt (OCVB) represents a world class gold–silver province, being a well-studied part of the Circum-Pacific Rim. Extensive research, preceding the system compilation, included collection of various data on major gold–silver, silver–lead–zinc, and tin–silver ore fields (with some data on minor gold–quartz, gold–sulfide, and gold–rare-metal sites). The database consists of 129 ore fields of the OCVB and comprises 433 geological, mineralogical, geochemical, and geophysical indicators. Using the original pattern recognition programs (accounting the frequencies and correlation of the indicators), the most informative indicators were selected, their weights (both positive and negative) were identified, and an expert system (solution tree) was compiled. The computer system is intended to be an assistance to an expert in the ore field potential evaluation. The system includes several blocks of questions with a goal of classifying the geochemical type and size of the analyzed ore field. The questions have an indirect character, so they could be answered by an expert at early stages of exploration (before drilling). The level of recognition of sizes of the ore sites in the control populations is 95% or higher. The aim of the expert system is to reestimate a large number of known ore sites in a relatively brief period of time with the aid of the personal computer. The revealed patterns could be used in other less studied parts of the Circum-Pacific belt. 相似文献
17.
硼在自然界有两种稳定同位素^11B和^10B,天然丰度分别为80．22％和19．78％。10B对具有强辐射能力的伽马射线具有良好的阻挡作用,^10B的热中子的吸收截面大,在多种领域均有广泛应用。扎仓茶卡盐湖沉积硼矿床^10B含量均值高于天然丰度值,富硼镁石矿石硼含量高,杂质少,属优质硼矿资源,具有特殊的社会经济价值,具备核用硼源加工供应基地的基本条件。在总结扎仓茶卡盐湖硼矿富10B矿床特征的基础上,对硼的富集及其同位素分馏机理进行了必要探讨。 相似文献
18.
本湖Ｓ_３盐层晶间卤水（简称晶卤）分异与钾盐矿床成因密切相关．察尔汗二级补给系统范围是晶卤分异最复杂的地区，为晶卤钾矿首采区，固、液态钾盐均有可观的储量，因此，深入研究本区晶卤分异问题，有助于进一步理解“阶段性淡化”说全部内容及本区钾盐资源充分利用研究．本文详细列示了晶卤总体、三级补给系统及垂直分异区在平、剖面上的分布，据此，可知其三维空间分布状况，准确预测任意切面、方向及位置晶卤的状态，并就许多问题进行了论述，有一定理论和经济意义． 相似文献
19.
Application of geostatistics in estimating recoverable reserves of beach sand deposit is rare. This paper made an attempt to estimate local recoverable reserves using disjunctive kriging and discrete Gaussian model considering support and information effects for a beach sand deposit located in the eastern part of India. The dependence of different selective mining unit (SMU) sizes and different production sampling strategies on the estimated tonnage, metal quantity, and the ore tonnage versus metal quantity relationships has been examined. The results of the study show that nonlinear geostatistics should be used for more precise assessment of the grade, ore tonnage, and metal quantity and their relationships, which are necessary for recoverable reserve estimation. In selective mining operation, both support and information effects have significant influence on recoverable reserve. Recoverable reserve estimation based on SMU involves estimating grade distributions of mining unit with much bigger support than the available drill core sample data. Information effect comes into picture from the real scenario where the actual grades of the blocks remain unknown even during mining. At the mining stage, discrimination of ore and waste blocks is carried out based on estimated grades of the production samples and it is likely that the blocks might be misclassified as either ore or waste and thus sent to wrong destination. Information effect modeling makes the estimation more reliable by taking care of misclassification. 相似文献
20.
A number of large and giant ore deposits have been discovered within the relatively small areas of lithospheric structure anomalies, including various boundary zones of tectonic plates. The regions have become the well-known intercontinental ore-forming belts, such as the circum-Pacific gold–copper, copper–molybdenum, and tungsten–tin metallogenic belts. These belts are typical geological anomalous areas. An investigation into the hydrothermal ore deposits in different regions in the former Soviet Union illustrated that the geologic structures of ore fields of almost all major commercial deposits have distinct features compared with the neighboring areas. These areas with distinct features are defined as geo-anomalies. A geo-anomaly refers to such a geologic body or a combination of bodies that their composition, texture–structure, and genesis are significantly different from those of their surroundings. A geo-anomaly unit (GU) is an area containing distinct features that can be delineated with integrated ore-forming information using computer techniques on the basis of the geo-anomaly concept. Herein, the GU concept is illustrated by a case study of delineating the gold ore targets in the western Shandong uplift terrain, eastern China. It includes: (1) analyses of gold ore-forming factors; (2) compilation of normalized regional geochemical map and extraction of geochemical anomalies; (3) compilation of gravitational and aeromagnetic tectonic skeleton map and extraction of gravitational and aeromagnetic anomalies; (4) extraction of circular and linear anomalies from remote-sensing Landsat TM images; (5) establishment of a geo-anomaly conceptual model associated with known gold mineralization; (6) establishment of gold ore-forming favorability by computing techniques; and (7) delineation and assessment of ore-forming units. The units with high favorability are suggested as ore targets. 相似文献