共查询到20条相似文献，搜索用时 31 毫秒
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第四纪时期,罗布泊盐湖独特的地理及气候环境形成了世界罕见的巨量钙芒硝沉积及其晶间富钾卤水的大规模聚集成矿。故此,罗布泊盐湖环境演化与钾盐矿床的成因一直备受国内外地质学家关注。罗北超大型卤水钾盐矿床从1995年发现至今已有20余年,其钾盐地质科学研究、勘查开发等均取得了重大进展,并已建成世界最大的硫酸钾肥生产基地。文章详细回顾、总结罗布泊超大型卤水钾矿发现以来的盐湖沉积演化、成钾条件、成钾理论研究及找矿勘查方面的重要成果,探索成矿理论创新与找矿突破的内在规律与联系。罗布泊钾盐成矿研究基本演变是:(1)基于盆地分隔、矿随盆移的概念,发展从"高山深盆"模式到"高山深盆-迁移成矿"模式,取得罗北凹地找矿突破;(2)基于巨量钙芒硝的发现,突破盐湖石盐阶段成钾的"三阶段"模式,提出"二阶段"模式,推动罗北及外围大规模勘查;(3)基于地堑式断陷带的发现,提出"含水墙"成藏模式,使找矿从"水平状"到"直立状"储藏模式转变,取得深部找矿突破等。总之,罗布泊盐湖成钾理论的每次创新认识,相应地带来找矿突破进展;继续深入加强盐湖钾盐矿床形成规律研究,可能还会带来钾盐成矿的新认识,开拓找矿方向。 相似文献
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我国盐湖钾盐资源现状及提钾工艺技术进展 总被引：6，自引：3，他引：3
中国是一个农业大国, 钾肥缺口很大。中国又是一个多盐湖的国家, 盐湖中蕴藏着丰富的钾盐资源, 有望解决中国的缺钾问题。中国已经建立了青海察尔汗和新疆罗布泊两个钾肥生产基地, 但还是远远满足不了国内钾肥需求, 70%需要依赖进口。因此, 有必要继续加强钾盐开发研究, 建立新的钾肥生产基地。通过长期攻关, 我国氯化物型和硫酸盐型盐湖形成了比较成熟的提钾工艺路线, 但是, 碳酸盐型盐湖提钾研究刚刚起步。本文对青海察尔汗盐湖和新疆罗布泊盐湖两大中国钾肥生产基地的资源及生产工艺进行了分析研究, 其成功的开发经验可用来指导我国同类型其他盐湖钾资源的开发; 探讨了开发我国碳酸盐型盐湖钾盐的可行之路, 碳酸盐型盐湖通过技术创新, 可以在盐湖现场获得钾肥产品; 指出我国不同水化学类型的盐湖应采取不同的资源利用工艺路线。 相似文献
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Minli CUI 《《地质学报》英文版》2019,93(Z2):57-58
The period and cost of mine exploration in new strange areas are very strict and very little geological data is available. The working area is usually covered by the exuberant vegetation, so the surface observation is very difficult and the working environment is very harsh. This paper introduces the application of high‐precision ground magnetic method to the rapid, efficient and low‐cost prospecting of favourable areas for mineralization in Khammouane Potash Deposit, the Lao P.D.R. 相似文献
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世界海相钾盐矿床特征定量化分析及其意义 总被引：6，自引：0，他引：6
通过对世界26个主要的海相钾盐矿床进行详细的特征描述和定量化分析,获得了较为完善的海相钾盐矿床的特征参数值。结果表明钾矿区面积占盆地面积4.47%、矿区含矿密度为1.616×106 t/km2、盆地含矿密度值为0.045×106 t/km2、钾盐层最大厚度与总盐层最大厚度的比值为7.2%;按构造类型分类,相对活动区盆地含有最丰富的钾盐资源量,其矿盆比为6.87%、矿区含矿密度值是5.068×106 t/km2、盆地含矿密度值为0.063×106 t/km2、钾/总盐值为12.27%,其中后三项特征参数值在盆地构造类型中均属最大。讨论了世界海相钾盐矿床定量化研究的意义,不同类型钾盐矿床的特征参数有助于对我国海相盆地成钾条件研究,并可以对海相盆地中未发现钾资源储量进行远景预测与评估。 相似文献
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Regional Distribution and Prospects of Potash in China 总被引：4，自引：0，他引：4
ZHENG Mianping an ZHENG Mianping YUAN Heran LIU Xifang CHEN Wenxi LI Jinsuo 《《地质学报》英文版》2011,85(1):17-50
China was formed by amalgamation of several small continental blocks (cratons), micro, blocks and orogenic belts in different paleoclimatic settings. It may be correlated with other continental blocks but has its own specific characteristics; therefore the tectonic environments of China’s marine and continental saline basins and salt, and potash, forming environment have some specific characteristics: multiple phases of salt formation, difference in salt, forming ages, migration and concentration of salt, forming processes and diversity of component materials, as well as small sizes of marine saline basins and great changes of saline basins in the late stage and occurrence of abundant liquid mineral resources. The nature of the tectonic basement exerted a key controlling effect on the formation of potash basins. The stable tectonic region was favorable for potash concentration in a quasi, stable region, and quasi, and the quasi-stable region was favorable for salt concentration and potash formation in a local stable tectonic region. Most China’s major ancient saline basins occur in “quasi, cratons (continental block)”; especially all the marine saline basins occur in continental blocks with the Precambrian basement. These regions are the key ones for potash search. Most relatively large, scale soluble salt deposits are developed in relatively stable continental nuclei. According to the characteristics of the tectonic domains where China’s salt, forming basins are located, the North China, Yangtze and Tarim, Qaidam salt minerogenetic domains and the northern Qiangtang, western Yunnan salt minerogenetic belt may be distinguished. Their salt and potash prospects will be discussed separately. 相似文献
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中国钾盐区域分布与找钾远景 总被引：29，自引：0，他引：29
中国大陆是由不同古气候环境下的若干小陆块(克拉通)、微陆块和造山带拼合而成,既可与其他大陆块对比,又有其特殊性,因而导致中国海、陆相盐盆地构造环境和成盐成钾的某些特殊性,表现为:具有成盐多期性;成盐时代的差异性;成盐作用迁聚性;物质成分多样性;海相盐盆地规模较小;盐盆地后期变动大和液态矿产等特点。构造基底性质对钾盐盆地形成的具有关键性控制作用:稳定构造区在准稳定区有利聚钾;准稳定在局部稳定构造区利于聚盐成钾。中国主要的古代盐盆地多产于"准克拉通(陆块)"、特别是海相盐盆地均发育于前寒武纪为基底的陆块中,该区是找钾的关键地区。且规模较大的叠合结构可溶盐沉积多发育于较稳定的陆核中。按中国成盐盆地所在构造域特点,划分为华北盐类成矿域、扬子盐类成矿域、塔(里木)—柴(达木)盐类成矿域以及羌北—滇西盐类成矿带,并分别讨论其成盐找钾远景。 相似文献
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Potash salt is one of key scarce strategic resources. Searching for large scale of potash salt deposit is one big problerm which Chinese academic community faces. Many new discoveries of world potash deposit have been made in recent ten years, which provide abundant practical information and complement the potash metallogenic theory. Through the summary of the potash forming characteristics at home and abroad, the paper studies the potash forming time, tectonic condition, paleogeographic condition, paleoclimate, basin location and salt source. Potash is mainly formed in Permian, Cretaceous, late Jurassic, Cambrian and Devonian. The combination of structure and environment helps to form large scale of evaporation. The climate cycle is related with crust activity. As the other ore deposit, the formation of potash ore also needs dry climate. Potash is the product of final stage in brine evolution, and therefore, it needs persistent drought climate. However, the climate condition is very complicated. Drought climate belt also occurs in humid climate stage, which is controlled by geomorphology. Potash ore can also form in local drought condition. Generally, potash forms in rock salt basin. However, the actual situation is very complicated. Some potash basin is coincided with rock salt basin, some is on one side of rock salt basin; and some are even in the outside of rock salt basin. Salt materials can be from three sources: marine source, terrigenous source and deep source.The paper gives an overview of the research status about the potash deposit forming conditions, which has great guiding significance for searching potash deposit in China. The paper also summarizes the three types of metallogenic models for potash deposit, including epicontinental metallogenic model, abnormal marine evaporation model and rift valley model. The three models are mainly different in material sources, in which the potash in epicontinental metallogenic model is from seawater; the potash in abnormal evaporation model is from nonmarine brine and the potash in rift valley model is mainly from deep material of volcanic activity. 相似文献
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Supattra Khamrat Prachya Tepnarong Kiattisak Artkhonghan Kittitep Fuenkajorn 《Geotechnical and Geological Engineering》2018,36(1):49-62
Consolidation tests have been performed to determine the mechanical properties of crushed salt as affected by applied stresses and consolidation period. The crushed salt with particle sizes ranging from 0.075 to 4.76 mm mixed with 5% saturated brine are consolidated under axial stresses ranging from 2.5 to 10 MPa. The consolidation curves show instantaneous and transient strains. The densities, uniaxial compressive strengths and elastic moduli measured after consolidation for 3–180 days increase with applied stresses and time. The crushed salt properties are determined as a function of mean strain energy required during consolidation. The relations are used to predict the crushed salt properties installed in exploratory boreholes under various external pressures. Two main mechanisms strengthen and stiffen the crushed salt mass: (1) consolidation by volumetric change due to particle rearrangement and cracking, and (2) recrystallization and healing processes. The borehole depth and installation time are significant factors controlling the long-term density, strength and stiffness of the crushed salt seal. 相似文献
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正The Kuqa depression in Tarim basin is abundant with petroleum exploration data,and a large number of drill cuttings data are available by drilling.A full use of these data to conduct secondary development is the most 相似文献
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钾盐矿作为农业三大肥料中钾肥的主要原料,是国家粮食安全的重要保障,也是我国紧缺的七大宗矿产资源之一.当前可供开发利用的主要是可溶性钾盐资源,现场勘探和开采急需相关仪器和快速分析技术的支持.项目组采用自主研发的便携式锂钾分析仪,在对钻探钾盐样品采用超声波技术进行消解的基础上,选择K的分析谱线波长为766.49 nm,建立了测定钾盐样品中水溶性K的快速分析方法,并在钻探现场得到示范应用.在最佳工作条件下测得K的检出限为9.0μg/L,方法的精密度(RSD)<2％.对钾盐样品进行加标回收实验,加标回收率均在94.5％～106.7％范围内.钾盐现场分析结果与实验室ICP-AES测量结果的一致性良好,现场快速分析方法的准确度高,可满足地质调查和资源勘查的要求,为实时指导钾盐资源现场勘查与开采提供了科学信息与技术支撑. 相似文献
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塔里木盆地西部卤水地球化学特征及成钾远景预测 总被引：13，自引：0，他引：13
在塔里木盆地的地质发展史上，尤其是在白垩纪和第三纪，经历了多次新特提斯海的海进和海退，带来了大量成盐物质，再加上后期持续干旱的气候条件和适宜的岩相古地理条件，使塔里木盆地沉积了一套厚层石盐岩、膏泥岩、碳酸盐岩以及泥质岩等，为钾盐资源的形成奠定了一定物质基础，同时由于受地质构造和中生代盆地断裂的控制所形成的若干次级盆地，加上适宜的古地理环境，使其具备了钾盐矿床形成的基本条件。通过野外实地考察取样，采集岩盐及卤水样品共300多件，用于实验分析的共142件（卤水43件）。通过对塔里木盆地西部卤水的地球化学特征分析，讨论了寻找钾盐的直接指标K+含量和各种地球化学特征系数，探讨了塔里木盆地的成盐模式、卤水浓缩阶段和成钾可能性，得出:塔里木盆地的钾盐远景区是喀什凹陷和阳霞凹陷；依据溴和硼含量以及各种特征系数值与正常卤水浓缩值比较，可知塔里木盆地是溴和硼等微量元素含量较少的地区，不能完全依靠这些特征参数来判断塔里木盆地的卤水浓缩程度和钾盐资源状况，同时也说明了塔里木盆地是一个成盐环境相对比较复杂的地区。 相似文献
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正Qarhan Salt Lake is located in the eastern part of the Qaidam Basin,which is first discovered the large potash deposit in the late 1950s.The Bieletan section is located in the west of Qarhan Salt Lake,where saline sediment 相似文献
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<正>Objective The Simao Basin in Yunnan Province has developed Cretaceous evaporite-bearing clastic deposits,including the Mangang and Mengyejing Formations which were originally interpreted as fluvial and lacustrine deposits.The Mangang Fm.composed of well-rounded quartz sandstones,were commonly considered as the bottom part of the Mengyejing salt series.During last decades,drilling projects targeting to prospect solid potash deposits in the Mengyejing salt series consequently ceased when encountering these sandstones.The poor understanding of sedimentary environments leads to no breakthrough of prospecting solid potash deposits in the Simao Basin.Our 相似文献
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为摸清全国钾盐矿资源家底,制定科学合理的经济产业政策,依据全国矿产资源潜力评价数据和成果,系统地开展了中国钾盐矿成矿特征研究和资源潜力评价。研究和评价结果显示,中国钾盐矿已发现的矿产资源以第四纪盐湖型钾盐矿为主,成矿时代以第四纪为主。钾盐矿主要分布在西部大型新生代陆相成盐盆地,在空间上可划分为12个Ⅲ级成矿区带。在典型矿床、区域成矿要素和预测要素研究的基础上,归纳总结了第四纪盐湖型、深藏地下卤水型、碎屑岩型、碳酸盐岩型4类钾盐矿的预测评价模型特征。以成矿系列理论为指导,采用矿床模型综合地质信息预测方法,共圈定钾盐矿最小预测区320个,归并圈定了42个3级预测区,并对各预测区进行了定量预测评价,6000m以浅钾盐矿预测资源量计32.63×10~8t(KCl),其中500m以浅钾盐矿预测资源量计15.10×10~8t。分析结果显示,全国以柴达木盆地及北缘钾盐成矿带和塔里木盆地钾盐矿成矿带预测资源量较大,预测资源量主要为第四纪盐湖型和深藏地下卤水型。潜力预测工作较全面地反映了当前的钾盐矿床地质和勘查信息资料水平,对指导钾盐矿地质找矿工作具有重要意义。 相似文献
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塔里木盆地地质环境演化及钾矿寻找研究进展 总被引：4，自引：0，他引：4
描述了我国钾盐资源的现状,总结了世界上大型钾盐矿床的分布和形成规律:物质基础、地质构造、岩相古地理及气候条件.分析了塔里木盆地的基本概况,阐述了在晚自垩-古近纪这一历史上重要的成盐期,塔里木盆地的地质环境演化历史,分析了塔里木盆地晚白垩纪和古近纪沉积相特点,确定了塔里木盆地的两个浓缩中心--库车凹陷和塔西南凹陷,综述了塔里木盆地的地质找钾状况,为钾盐的找矿工作做了良好的地质铺垫. 相似文献
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云南省勐野井式钾盐矿找矿模型及预测 总被引：4，自引：0，他引：4
勐野井钾盐矿产于新生代环扬子地块西缘兰坪-思茅双向弧后-前陆盆地勐野井组棕红色、杂色盐溶泥砾岩建造中。成矿具有明显的蒸发沉积韵律,钾盐矿层的产出受地层、岩相、构造等因素的控制。将其厘定为新生代（湖相）沉积型钾盐矿的典型矿床-勐野井式钾盐矿。并将成矿条件与之类似的兰坪-云龙、镇源-景谷、江城-勐腊3个地区作为预测工作区,... 相似文献
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东特提斯域思茅盆地钾盐成矿研究进展 总被引：1，自引：0，他引：1
思茅盆地位于东特提斯域,其内的勐野井钾盐矿是我国唯一的前第四纪固体钾盐矿,长期以来对此钾盐矿与呵叻巨型钾盐盆地的资源量差异和成因存在着有较大争议。特别是如下几个问题:其钾盐成矿时代是晚白垩世和古新世,还是侏罗纪的争议;其物质来源还存在陆源,海源和多源的不同认识;矿床成因机理模式也悬而未决。本文在前人研究基础上,结合项目组的最新进展,对上述这些问题的进行梳理与评述认为:勐野井组地层为晚白垩世Albian-Cenomanian期,同沉积的原生钾盐也是在此时期富集成矿;钾盐成矿后期特别是约14Ma以来,受到多期次的热液流体作用,形成次生脉状钾盐:钾盐成矿物质可能以中特提斯洋侵入的海水为主,辅以陆源水体和深部流体。总结认为,思茅与呵叻等盆地在晚白垩世都是干旱沙漠环境中彼此隔绝的小湖盆,随着中特提斯洋海水自西向东的入侵,海水由思茅流向了呵叻,形成了统一的思茅-呵叻海,这个模型可以解释有关成钾物源及思茅与呵叻盆地的成钾关系。思茅盆地钾盐矿的形成和后期变化始终受到了构造活动的控制,经历了最初断陷阶段,到沉积后期受印度-欧亚大陆碰撞导致的挤压和走滑运动影响。 相似文献