共查询到20条相似文献,搜索用时 140 毫秒
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溧水爱景山锶矿床小规模开发已十余年,1992年,该矿床全部勘探完毕,可大规模开发利用。文章对年产原矿1.7万吨,3,4肆吨,5.1万吨三个开发方案分别进行了静态经济效益和动态经济效益评价,并对三个方案的优劣进行了比较,最终优选出年产原矿3.4万吨的Ⅱ方案的最优方案。为合理开发利用该矿床提供了初步依据。 相似文献
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内蒙额济纳绿洲环境恶化的思考 总被引:10,自引:0,他引:10
张惠昌 《水文地质工程地质》1994,21(6):48-52
本文介绍了黑河下游额济纳绿洲的自然概况和40年来由于人类活动(盲目性和无政府状态、兴修水利工程、植被退化、片面追求目前的经济效益、短地行为等)造出水资源减少,地下水位持续下降,居延海干涸,土地沙漠化和盐渍化,植被退化等.其中主要原因是黑河下游的地表水径流量减少,中、下游开发利用不合理所致.全流域的管理协调水资源是解决额济纳绿洲环境恶化的先决条件.进而才能落实生态平衡的技术措施. 相似文献
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通过对南屿明矾石矿的地质特征、开发利用现状及前景进行分析研究,认为低品位明矾石可以开发利用。该矿山如果得到合理开发利用,将产生较大的经济效益和社会经济效益。 相似文献
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龙胜县矿产资源丰富,经多年的开发利用,基本形成了以滑石为龙头,辅以金、铅锌、温泉的资源开发格局。为了正确处理好矿产资源开发与生态保护、矿业经济与生态经济建设的关系,通过对龙胜县矿产资源开发利用形势的调查研究,阐述了在规范龙胜县的矿业活动及调整矿业经济结构方面的思路。指出以矿山开采企业为主体的龙胜矿业经济体系,其资源开发利用层次不高,经济效益不理想,产生的环境影响也比较大。认为调整矿业产业结构,改变矿业经济不合理增长方式,已成为保障矿业经济可持续健康发展的首要任务。 相似文献
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长春市齐家特大型水源地是吉林省水量最为丰富的4处特大型地下水源地之一,开发利用该水源地.必将取得一定的经济效益和社会效益,前景看好。 相似文献
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广东非金属矿产及几种有待开发利用的资源 总被引:1,自引:0,他引:1
扶同逸 《有色金属矿产与勘查》1996,5(2):110-113
广东省具有较好的非金属成矿地质条件,资源丰富,品种齐全,除与冶金,石油化工,建材工业对口的大中型优质资源基地已开发利用外,大多数资源利用程度基低,充分开发利用有经济效益的非金属矿产资源的潜力较大,经资源调研和市场调查,珍珠岩类,沸石,膨润土粉石英,钾长石等矿产资源开发前景较好,应致力高级产品的开发。 相似文献
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论三峡库区地质灾害防治工程综合效益 总被引:1,自引:0,他引:1
任幼蓉 《地质灾害与环境保护》2002,13(2):70-74
从防治地质灾害的角度,探讨防治工程如何结合三峡库区经济、社会、人口、资源、环境全面协调发展,力求近期与远期的目标利益为最佳兼顾,从单纯的地质灾害工程防治综合向解决社会经济和环境保护问题转变,坚持防治效益与生态效益、经济效益和社会效益并重,将治理保护与开发利用相结合,力求获得库区整体的最大综合实效。 相似文献
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东海金红石矿床地质特征及其综合利用研究 总被引:2,自引:2,他引:2
江苏东海金红石矿储量大,开采技术条件简单,地理位置优越。矿石中伴生绿辉石、石榴子石、磷灰石等有益成分。将其综合开发利用,直接经济效益将是单一开发金红石的3倍以上,且有良好的社会效益。 相似文献
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地理信息系统是用于采集,管理和分析与空间位置有关的和相应属性信息的计算机系统。是解决资源.环境和社会等复杂问题的综合系统,是一种良好的管理工具和决策支持系境。广西是一个自然资源十分丰富的地区,具有农业、林业,海洋,矿产、水文,旅游等各种资源。如何才能迅速、准确地对这些资源开发利用和管理,如何对广西的各种资源进行全面的、系统的、科学的评价,为政府部门的决策、规划和投资提供可靠的科学依据,据高管理水平和经济效益?要解决这些问题,地理信息系统是目前最好、最有效和最科学的技术工具。 相似文献
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The mineral barite (BaSO4) can precipitate in a variety of oceanic settings: in the water column, on the sea floor and within marine sediments. The geological setting where barite forms ultimately determines the geochemistry of the precipitated mineral and its usefulness for various applications. Specifically, the isotopic and elemental composition of major and trace elements in barite carry information about the solution(s) from which it precipitated. Barite precipitated in the water column (marine or pelagic barite) can be used as a recorder of changes in sea water chemistry through time. Barite formed within sediments or at the sea floor from pore water fluids (diagenetic or cold seeps barite) can aid in understanding fluid flow and sedimentary redox processes, and barite formed in association with hydrothermal activity (hydrothermal barite) provides information about conditions of crust alteration around hydrothermal vents. The accumulation rate of marine barite in oxic‐pelagic sediments can also be used to reconstruct past changes in ocean productivity. Some key areas for future work on the occurrence and origin of barite include: fully characterizing the mechanisms of precipitation of marine barite in the water column; understanding the role and potential significance of bacteria in barite precipitation; quantifying parameters controlling barite preservation in sediments; determining the influence of diagenesis on barite geochemistry; and investigating the utility of additional trace components in barite. 相似文献
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萤石重晶石方解石共生非金属矿物分析方法研究 总被引:1,自引:0,他引:1
萤石、方解石、重晶石是自然界中普遍共生的非金属矿,具有十分重要的经济价值.目前对于该类共生矿物中不同矿物含量的分离测定,尚未建立较系统、准确的方法.本文通过条件试验,选用10%冰醋酸作为溶剂溶解分离方解石和萤石,硝酸-高氯酸溶解分离萤石和重晶石,制定了一套适用于方解石、萤石、重晶石共生矿物的分离分析方法流程.应用该实验流程对三类矿石组合样品及实际样品进行分析,内外检的测定结果准确可靠;对GBW 07250 ~ GBW 07254五个萤石国家一级标准物质和一个重晶石管理样品进行分析,方法精密度(RSD)<0.4%,证明该方法流程也适用于萤石或重晶石含量较高的样品分析.与国家标准方法GB/T 5195.1-2006(萤石氟化钙含量测定)比较,本流程更加连续简便,可指导方解石、萤石、重晶石共生矿物资源评价、选矿及回收试验,有利于提高该类非金属矿物的综合利用价值. 相似文献
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A. Allibone 《Australian Journal of Earth Sciences》2013,60(6):727-742
Gold mineralisation at the Dobroyde prospect in central New South Wales is hosted by a zoned alteration system characterised by peripheral propylitic alteration, grading inwards through argillic and advanced argillic alteration to a siliceous altered core. Overprinting textures indicate that propylitic, argillic, advanced argillic and siliceous assemblages were successively superimposed on each other. Au grades between 0.3–0.8 ppm are associated with siliceous alteration and cross‐cutting pyrite veinlets. Higher Au grades are associated with barite veins that cut the pyrite veinlets. Native Au, native Te, Au, Pb and Hg tellurides, Pb selenide, chalcopyrite, Zn‐sphalerite and tennantite‐tetrahedrite occur in the barite veins. Microscopic pyrophyllite shears cut the barite veins. The location of the Dobroyde prospect, the orientation of its internal alteration zonation and the orientation of auriferous barite veins in the core of the prospect are controlled by a 330°‐striking fault. Movement on this fault, synchronous with hydrothermal activity, at some time between the Late Ordovician and mid‐Devonian controlled the development of successive phases of brecciation, siliceous alteration, pyrite and later barite‐Au veining in the prospect core. The restricted distribution of auriferous barite veins within the siliceous altered core of the prospect is inferred to be controlled by the relatively brittle rheology of this assemblage during deformation, and its location on the fault that formed the main hydrothermal fluid conduit. Alteration zones distal from this fault remain unmineralised. The Dobroyde prospect may be a product of the same Early Devonian metallogenic epoch as the paragenetically similar Temora and Peak Hill deposits. All three deposits/prospects appear to be localised in splays of either the Gilmore Fault Zone or the Parkes Thrust. 相似文献
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随着振动台、离心机等动力学模型试验方法的不断发展,对于动力学相似材料的要求也愈加精细。在满足动力学相似理论的基础上,如何快速、准确地配制出性质合理的相似材料是试验中至关重要的一步。本文以粒度不同的河沙、重晶石粉、铁粉、云母片为原料,以速干水泥为胶结物,对不同材料混合的动力学相似材料性质进行了试验研究。试验结果表明:(1)级配良好的骨料所配置的相似材料密度较大,且颗粒间断级配越大,骨胶比对相似材料密度影响越大;(2)以河砂为骨料、水泥为胶结物,可以配制出密度为1.5~2.2g ·cm-3、动泊松比0.2~0.4、动弹性模量2.5~5.5 GPa的动相似材料;(3)铁粉的增重效果比重晶石粉显著,且铁粉试件的动、静弹性模量随铁粉增加而显著增大,而重晶石粉比例的变化对重晶石粉试件的动、静弹性模量影响不大,在配制"高重低强"的动力学相似材料时,重晶石粉是更理想的原料;(4)随着云母用量的不断增加,试件的密度、动泊松比和动、静弹性模量均显著降低,云母片是很好的减强剂,可以用来模拟岩体间软弱夹层或结构面。 相似文献
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The Shilu iron ore deposit, located in the western Hainan Province, South China, is one of the most important iron-ore mining districts in China not only for its huge reserves of hematite- rich ores, but also for its potentially economic significance of associated metals of copper, cobalt, nickel, silver, lead and zinc, and of non-metals of dolomite, quartzite,barite,gypsum and sulfur. 相似文献
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Comparison of modern and ancient barite‐bearing acid‐sulphate soils using micromorphology,geochemistry and field relationships
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Although pedogenic barite has been documented in many modern soils and palaeosols, no actualistic studies on its formation have been reported. Because barite is stable over the entire range of pressure and temperature of the Earth's crust, it preserves reliable data about the original environment in which it formed. Pedogenic barite and barite‐bearing soils have been used as indicators of landscape stability, environmental conditions, climate and microbial acti‐vity. This study compares field data, micromorphology and stable isotope geochemistry of a barite‐bearing palaeosol from the Morrison Formation (Jurassic) and a modern analogue soil in south‐central Texas, USA. Morrison barite‐bearing palaeosols are over‐thickened cumulic palaeosols that developed in subaerially exposed lacustrine sediments during an extended lake contraction event. Lateral facies relationships document changes in hydrology and duration of episaturated conditions (perched water table above the Btg horizons) that correspond to differences in barite nodule morphology and abundance. Barite precipitation occurred at a redox boundary higher on the landscape after organic matter was completely oxidized. Sulphur isotope data indicate that the initial source of sulphur was soil organic matter. Meteoric water is the likely source of oxygen for the sulphate. Barium sourced from weathering feldspars and clays. The modern analogue displays similar catenary relationships, redox features and micromorphological characteristics compared to the Morrison palaeosols, suggesting that similar pedogenic processes led to barite precipitation. Synthesized data suggest that conditions favourable to barite‐bearing soil formation are low‐gradient basins that have received feldspar‐rich sediments (i.e. volcanically influenced basins), soils that developed near salt domes, soils that developed in exposed wetland or lacustrine sediments and coastal plain deposits. When studied in a well‐documented palaeogeographic context, barite‐bearing soils are valuable to palaeoclimate, palaeoenvironmental and palaeohydrological studies. Combined with regional interfluve palaeosols, barite‐bearing palaeosols may document temporal changes in drainage, surface stability, and accommodation consistent with sequence boundaries/maximum flooding surfaces and climate changes. 相似文献
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我国的钾、磷、硫、硼以及天然碱、金红石、砷、钠硝石、石盐、芒硝、重晶石、萤石、天青石、明矾石、化工灰岩、硅藻土、膨润土等化工矿产资源 ,与世界相比 ,在资源量、生产能力、消费水平等方面的地位各不相同。面对未来 ,宜根据各矿种的实际情况 ,在地质找矿、开发利用、对外贸易等分别有所侧重 ,以保证市场之需求。 相似文献