共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
文章依据放射性水文地球化学找矿理论,运用花岗岩热液铀矿水异常晕与铀矿化之间的关系,采用R型逐渐聚类分析方法,通过对下庄矿田北部330矿床及其外围水化学资料的统计整理,对铀矿床水分散晕指示元素(或指标)的组成及其分带性进行了初步探讨,认为该矿床水分散晕指示元素和指标由U,SO4^2-,F^-,Al^3 ,Mg^2 ,Cr,Ni,Mo,Pb,As,Bi,Mn,M(矿化度)等组成,而且,这些元素和指标具有分带规律。 相似文献
4.
原生晕垂向分带模型找矿法及其在铀矿勘查中的应用 总被引:1,自引:0,他引:1
原生晕指示元素垂向分带模型找矿法是通过发现、研究矿床原生晕指示元素垂向分带规律、建立指示元素垂向分带模型进行找矿的地球化学勘查方法。找矿实践表明,该方法可用于攻深找盲、推断矿体剥蚀程度、追踪矿体延伸方向,其找矿效果明显。有关该方法分带序列计算方法、分带模型以及在铀矿床(体)预测应用等方面已取得了较大进展。在分带序列计算方法方面,我国化探工作者提出的广义衬值法、浓集重心法,计算过程简单,值得推广。近年来该方法的重要研发成果——构造地球化学原生叠加晕评价技术在铀矿地质领域得到了广泛应用,可大大减小工作程度较高地区的化探工作量、降低勘查费用、缩短勘查周期,从而有效提升铀矿资源勘查的水平和能力。因此,该方法应用于铀矿勘查,其前景非常广阔。 相似文献
5.
文章通过对某区放射性水文地球化学特征的研究,探讨了矿化水的成因和基本特征,铀在溶液中的存在形式,含铀水迁移强度;铀和氡在水中的迁移距离;水化学组分与矿化的关系。总结了工作区的放射性水化学找矿标志和评价水晕的综合判别准则。在研究的基础上,预测了新的成矿远景地段,提出了现有矿床可能属于后生气热水改造复成因矿床的假说以及根据这些假说似算这类矿床铀总量的方法。 相似文献
6.
The research achievements of geogas prospecting through the mechanisms of geogas prospecting and its applied research in the area of concealed uranium deposits prospecting were analyzed. Geogas prospecting is a new means of deeply concealed deposits exploration that started to develop gradually from the 1980s and is at an initial stage of research in concealed uranium deposits exploration. Furthermore, comments and suggestions were provided for following research work by summarizing the shortcomings and problems of current studies in this paper. A general upward micro-flow of geogas could carry the metal nanoparticles associated with ore body underground to the surface of earth to come into being anomaly halos of elements contents above the ore body, and with these anomaly halos, the relevant information of deeply concealed uranium deposits (or other classes of metal ore bodies) would be reflected. The depth that geogas measurement could achieve for prospecting concealed deposits under the covering layers is up to a thousand meter. Geogas prospecting can be used for investigating in small scales, surveying generally and in detail in big scales and locating the ore bodies. At the present stage, there are three primary under-mentioned problems in the studies of geogas prospecting: ①On the one hand, the researches of how mediums (covering layer) would affect the migration process of geogas are far from enough. On the other hand, appropriate mathematical theory models have not been set up yet. ②In China, there are currently few accurate and practical physical models for geogas prospecting to carry out controllable and repetitive series experiments as well as theoretical studies. It is essential that an appropriate physical model should be established timely in order to provide an experimental platform and a kind of technical assistance for the mechanism study of geogas prospecting. ③To achieve the aim of popularizing the geogas prospecting in the uranium exploration area, the research of trapping solution and sampling and measuring methods should be further developed and the methods of rapid geogas in-site measuring which are suitable for various geologic structures of uranium deposits should be made reasonably to cater to the need of rapid and accurate field measurement. 相似文献
7.
8.
INTRODUCTION Point defects in quartz have attracted intensiveand continuing research since the 1950s ( Weil ,2000 ,1984 ; Marfunin, 1979 ; Weeks , 1956 ; McClellandand Donoghue ,1953) because they are key factors inenhancing ( or reducing) device performance andquality of this i mportant piezoelectric and optical ma-terial (Beall ,1994) .Point defects in quartz are usu-ally dilute in concentration and,therefore ,are ame-nable to study by only a fewstructural techniques ,ofwhich electron… 相似文献
9.
10.
Alteration of rocks and localization of uranium mineralization in the northwestern Strel’tsovka caldera are exemplified in
the Dal’nee deposit. In the main parameters of hydrothermal mineralization (temperature, pH, pressure, and composition of
solution), the Dal’nee deposit differs from the deposits of the Strel’tsovka ore field located in the central part of the
caldera. The localization of high-grade stratiform orebodies are interpreted in light of kinematic relations between steeply
and gently dipping faults that formed in the tectonic setting of the NE-SW-trending, long-living, right-lateral, strike-slip
faulting. The wide halos of argillic alteration and the structural control of uranium mineralization are caused by the fact
that the deposit is located at the margin of the geological block, which has developed since the Late Triassic in a regime
of extension (pull-apart) to form a depression, which is arranged en echelon relative to the main caldera and comparable to
it in area. Currently, this depression is overlapped by sediments of the Sukhoi Urulyungui Basin. Such a structure markedly
increases the probability of finding hidden uranium ores associated with low-temperature argillic alteration in the volcanosedimantary
rocks and granitoid basement of the northwestern Strel’tsovka caldera. 相似文献
11.
《International Geology Review》2012,54(11):1622-1627
Variations in the Ag:Au ratio are discussed, as in halos of ores in the Baley goldfield, across the strike of ore bodies, as well as up-dip. The results bring out spatial zonations in the halos. Attention is called to the usefulness of the ratio in ascertaining migration paths of the hydrothermal solutions, microstructures of the halos, forms of the elements, as well as in prospecting for the ores. — Authors. 相似文献
12.
为预测和评价山东蓬莱石家金矿床的深部找矿远景,延长矿山服务年限,着重论述了该矿床的原生晕地球化学特征,对矿床的深部找矿潜力进行了探讨。原生晕元素组合特征分析表明,石家金矿床的矿体及近矿晕元素组合为Au、Ag、Cu、Pb、Zn、S、Te,前缘晕为Hg、As、Sb、Ba,尾晕为Mo、W、Sn。元素异常形态特征显示,326号矿脉南段以前缘晕和近矿晕为主,北段以前缘晕和尾晕为主,近矿晕元素异常较弱,矿体总体具有向南侧伏的特点。原生晕轴向分带序列在36线和84线均呈现反分带和前缘晕、尾晕共存的特点,结合地球化学参数在垂向上呈振荡波动变化的特征,说明矿体由多期次成矿作用叠加形成,同时预示矿体向深部还有一定延伸或有盲矿体存在。综合分析认为,326号矿脉南段为成矿的有利部位,深部仍有较大的找矿空间;矿体北段深部矿化减弱,但出现了前缘晕、尾晕元素的共存,预示深部可能还有盲矿体存在。 相似文献
13.
莅香洼金矿发育有与金矿关系密切的地球化学异常,Au及相关元素的平均含量从安山岩→蚀变安山岩→蚀变岩→矿化蚀变岩呈几何级数递增。沿F985构造蚀变带走向,Pb、Ag与Au的组合异常通常与金的矿体晕分布一致,而As、Sb组合则更多反映了矿体前缘晕的组合特点,沿倾向,Au及相关元素自浅而深具有分段富集特征,并在1023m标高和976m标高构成二个浓集中心。其理想的元素轴向分带序列为:前缘晕As、Sb—Ba,矿体晕Au、Ag、Pb、Zn、Cu、Mo,矿尾晕(Cu、Mo)-(Co、Ni、Bi)。文章在前人研究的基础上,系统总结了莅香洼金矿床的地球化学特征,总结了构造蚀变岩型金矿床的地球化学找矿标志,建立了萑香洼金矿床的地球化学找矿模型。 相似文献
14.
15.
内蒙古哈达门沟金矿床13号脉构造叠加晕模式及深部找矿预测 总被引:1,自引:0,他引:1
哈达门沟金矿床13号脉受断裂构造控制,具有多期多阶段叠加成矿(晕)的特点.矿床分为4个成矿阶段,各成矿阶段元素含量和地球化学特征参数表明,金成矿与金属硫化物关系密切.第Ⅰ阶段成矿较弱,第Ⅱ、Ⅲ阶段为主成矿阶段,第Ⅳ阶段不成矿.确定矿床的头晕元素为As、Sb、Hg,矿体晕元素为Au、Ag、Cu、Pb、Zn、Bi,尾晕元素为Ni、W、Co、Mo.建立了原生叠加成矿成晕模式,矿脉在垂向上形成串珠状分布的多个富集矿体,各富集矿体上部存在头晕元素异常,中部对应矿体晕元素异常,下部存在尾晕元素异常,富集矿体之间存在头、尾晕元素共存区.总结了应用模式找矿的准则,认为在含矿构造带内,Au品位较低时,如果存在头、尾晕元素共存,则指示深部有矿,当再叠加Cu、Pb、Zn等元素异常时,指示深部矿体还很富.同时,利用构造叠加晕模式和深部预测标志对已知矿体深部进行盲矿体预测,在实践生产中得到了很好的验证. 相似文献
16.
为延长大水金矿的服务年限,解决资源危机,通过对矿区构造叠加晕研究,对其深部找矿潜力和找矿方向进行预测和评价。系统采集矿区69个中段、120个钻孔的岩石、矿石样品进行测试分析,利用多元统计方法,对矿区成矿成晕元素的组合特征和空间分布特征进行分析,并以找矿前景较好的87(B)勘查线为主要研究对象。研究表明:(1)大水金矿主成矿元素Au与伴生元素As、Sb、Hg表现出较好的正相关关系,可作为后期找矿勘查的重要指数元素;(2)原生晕元素具有“前、尾晕共存”和“反分带”现象,且地球化学参数在轴向上呈波动变化的特点,表明大水金矿成矿过程具有多期多阶段叠加的特征,预示深部有盲矿体存在;(3)通过预测,在87(B)勘探线深部得到验证,发现了新的矿体。结果证明原生晕对预测深部隐伏矿体具有重要指导意义。 相似文献
17.
金矿床地球化学异常模式研究的新进展 总被引:14,自引:0,他引:14
论述了近十年来金矿床地球化学异常模式研究的新进展,90年代以前研究和建立了石英脉和蚀变岩型金矿地球化学异常模式,90年代以来,研究和建立了中国主要类型金矿床地球化学导航异常模式,热液金矿床和原生叠加晕理想模式,金矿床包裹体气晕,离子晕及其叠加晕理想模式。 相似文献
18.
文中总结了金矿化探在西北的应用效果,介绍了不同地球化学景观区的工作方法技术,金异常晕的基本特征与分布规律,合理的化探工作程序,金异常晕的检查方法及找矿实例。 相似文献
19.
The properties of gravitationally bound clouds (halos) of dark matter derived via numerical simulations of the distribution
of dark matter in the Universe are investigated. The analysis makes use of a catalog of halos obtained in the European “MareNostrum
Universe” project, which has achieved a better balance between resolution and representativeness than catalogs used earlier
for similar studies. This has made it possible to refine the main tendencies displayed by the evolution of the halo masses
and the angular velocities and density profiles of the halos. The results are compared with the newest available observational
data and with known results obtained earlier in numerical simulations with lower resolution and using smaller samples of halos,
making it possible to trace the influence of these factors on the results obtained. Disagreements between observations and
numerical models obtained in earlier studies are confirmed, and possible ways to explain them discussed. 相似文献