共查询到20条相似文献,搜索用时 15 毫秒
1.
土壤气汞探测在夏垫断裂带的应用研究 总被引:2,自引:0,他引:2
夏垫断裂带是首都圈重要的地震断裂带之一,本文运用构造地球化学对该断裂带进行研究。采用土壤中气态汞测量法在断裂带上的齐心庄和东柳河屯两个剖面进行了细致的野外现场勘测,绘制出研究区土壤气汞分布曲线图和汞含量分布立体图,对研究区断裂带空间位置及走向进行了分析,获得齐心庄和东柳河屯剖面的异常阈值分别为0.23和0.27,阈值显示的异常位置指示了断层面的位置,推测认为断裂带总体走向为45°,断裂带的规模并不大,断裂带上齐心庄剖面的活动性要强于东柳河屯,应为今后地震监测的重点。 相似文献
2.
3.
物化探找矿方法面临着新形势下复杂地质条件中找矿的新挑战,单一物化探分析方法很难具有说服力,综合各种地质信息和勘探方法显得尤为重要。笔者结合河南省某矿床的找矿实践,介绍了高精度磁测、X荧光土壤分析和EH4测深等物化探综合分析方法,在工作区内发现了与成矿有关的物化探异常,经查证与地表地质现象吻合较好,说明该综合物化探评价技术方法在该矿床的应用是成功的,显示了其快速、高效和精准的特点。 相似文献
4.
5.
7.
8.
9.
通过对巴音戈壁盆地沉积盖层的分布,岩性组合及古气候环境分析,提出下白晋统巴音戈壁组上段形成于温湿的古气候环境,泥-沙-泥地层结构清晰,砂岩层中有机质含量较高,是巴音戈壁盆地层间氧化带砂岩型铀矿的找矿目的层。 相似文献
10.
湘西黔东汞矿带素以黔东“万山类型”汞矿床为代表,统称为“缓倾斜整合层带状”矿体。近年来,随着地质勘探与开采实践的不断深入,发现有不同于“万山类型”产状形态的另一种矿体,笔者称为“茶田类型”。这两类矿体在成矿作用方面有相似性,也有不同点,尤其在产状形态上完全不同。 相似文献
11.
《Journal of Geochemical Exploration》1986,26(1):1-117
The applicability of Hg as a pathfinder for base metal mineralization has been investigated in an Australian case-history-based study. The principal objectives of the project were: (a) to compare the behaviour of Hg with that of the target elements in the secondary environment with reference to the intensity and extent of the anomalies around outcropping base metal mineralization under varying conditions of climate and geomorphology; (b) to determine whether vapour-generated Hg anomalies can be detected in surface media over buried and blind mineralization, and if so under what geological, geomorphic and climatic conditions; (c) to define the most appropriate sampling media and methods for use in Hg surveys; (d) to develop appropriate techniques for the determination of Hg in geological samples.Some twenty-nine case history studies have been completed within this project, covering a range of styles of mineralization and commodities and where possible under varying secondary regimes. The data from these studies, together with laboratory and theoretical considerations, have led to the following conclusions regarding the geochemistry of Hg and its possible role in exploration for base metals: (a) Hg is present in sufficient concentration in many styles of mineralization to be a potential pathfinder; metamorphism does not necessarily lead to serious loss of the element. (b) Hg tends to give ‘residual’ anomalies with little observable secondary dispersion. Situations have been defined where the element is a valid pathfinder. However, in general exploration Hg has no advantages over the target elements, Cu, Pb and Zn. (c) Hg may, under certain conditions, indicate buried mineralization. (d) The use of gas-phase sampling is appropriate only in quite specific circumstances; soil is almost always the preferred sample medium. (e) Hg determination can be made at or below background levels in a routine manner if certain requirements are observed.The remaining question, that of blind mineralization, is in need of further testing since most study areas showed a geochemical expression. 相似文献
12.
13.
14.
深部钻探复合钻杆的研究与应用 总被引:10,自引:0,他引:10
绳索取心钻杆在深孔钻探中占重要的地位。本文分析了目前国内钻杆在深孔钻探中的使用情况,同时还对钻杆柱的失效及绳索取心钻杆在钻井内的受力情况进行了简要的分析。设计出了两种复合钻杆:一种是塔式复合钻杆,另一种是同径复合钻杆。将其应用在“中国岩金勘查第一深钻”山东莱州三山岛矿区ZK96-5孔4000m钻孔中,取得了良好的效果。 相似文献
15.
16.
略谈深源铀成矿与深部找矿问题 总被引:11,自引:2,他引:11
热液型铀矿找矿应着眼于寻找中大型矿床,以幔源叠造、深源成矿理论为指导,建立多元复合深源成矿模式。文章指出,热液型铀矿床存在热水循环富集型、岩浆期后热液型、地幔流体富集型等3种不同成因类型及其不同的成矿特点,并常在同一矿化集中区形成一成矿系列。大型铀矿田和富、大铀矿床常与幔源成矿有密切关系,其形成有特定的区域地质背景。文中还初步提出了幔源成矿的识别判据,指出今后找矿应自觉地确立适合于各自地区找矿类型的成矿模式,厘定可操作性强的找矿模式,实现以模式指导找矿。 相似文献
17.
460矿床构造几何学和运动学特征研究表明,460矿床构造格架是在大致自北西而南东的构造应力作用下,F45断裂带右行扭动并与F’45相互作用所形成。结合主矿段容矿构造产状和分布特征,提出矿区北西向反S形或弧形张-张扭性断裂是F45断裂的派生构造,是矿床定位的决定性因素;由陡倾断裂和缓倾地层组成的"断裂-地层圈闭"是矿床定位的另一重要因素。铀成矿作用与晚侏罗世—早白垩世火山作用没有直接的成因联系,而是与区域上强烈构造活动时期的构造活动密切相关。次流纹斑岩的侵入和两次铀成矿作用在时间上与区域上的强烈构造运动时期相对应,是区域构造演化不同阶段的产物,二者没有必然的因果关系。 相似文献
18.
With the rapid growth of complex network of different types of underground utility under large cities, the need of a noninvasive technique capable of swiftly and precisely detecting these utilities in such a noisy urban environment increases. Ground-penetrating radar (GPR) is considered one of the most promising techniques in this field. This study presents the experience of GPR data acquisition, processing, and interpretation in three cities located along the coast of the Red Sea. These cities are Jeddah in Saudi Arabia and Sharm El-Sheikh and Qusier in Egypt. Data acquisition parameters varied in the three cities based on site conditions, target characteristics, and equipment availability. The processing flows were kept simple to avoid introducing artifacts to the collected data. The results show that despite the difference in site conditions and survey parameters among the three cities, with the exception of fiber optic cable, GPR technique is capable of detecting different kinds of underground utilities and precisely determine the extension, diameter, and depth of burial of these utilities. 相似文献
19.
20.
CSAMT法在深部地质结构探测中的应用——以相山铀矿田邹家山地区为例 总被引:1,自引:0,他引:1
《物探与化探》2016,(1)
介绍了采用可控源音频大地电磁(CSAMT)测深在相山火山盆地邹家山地区进行的深部地质结构探测研究。通过此次探测,成功划分出了该地区2 km以浅范围内的组间界面和基底界面,识别出了3条断裂,揭露了地下岩体、构造的形态特征。通过与钻孔信息对比,发现CSAMT方法所划分的组间界面位置与实际位置吻合较好,证明了CSAMT方法在该区的深部地质信息探测中是一种行之有效的方法。 相似文献