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高精度磁测在山西省繁峙吐楼铁矿区勘探中的应用 总被引:1,自引:0,他引:1
该文阐述了高精度磁测工作在山西省繁峙吐楼铁矿区的应用,其高精度磁测目的是查清异常分布,查找隐伏铁矿体,圈定铁矿体分布范围、矿体位置、形态、大小、产状、边界等几何特征及查明矿区地质特征,根据现有探采工程揭露控制,初步估算了铁矿石资源量。 相似文献
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凡口铅锌矿是粤北地区超大型铅锌矿床,矿区地表第四系覆盖厚,地质环境复杂。此次物探方法选择地面高精度磁法测量和抗干扰能力强、探测深度大的可控源音频大地电磁法CSAMT(Controlled Source Audio Frequency Magnetotelluric Method),通过高精度磁法测量,圈定了断裂构造引起的磁异常带并推测该异常区可能存在隐伏矿体的位置;CSAMT法测量结果很好地反映了断层及矿体的空间展布。两种集成方法对该矿区深部的勘查预测具有良好的找矿效果,为下一步找矿工作提供了较准确的依据。 相似文献
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伊昭井田为伊犁盆地一特大型隐伏煤田,井田东南部地表煤层自燃形成大面积火烧区。采用地面高精度磁测工作,探测并圈定深部隐伏火烧区范围。煤层自燃后,顶底板及夹矸受到高温作用形成的烧变岩具有热剩磁现象,能在地面引起一定强度的磁异常,是开展磁测工作的地球物理前提。该文从磁测的理论依据、数据采集、资料的处理与解释、解译精度等方面进行了详细论述。探测面积约5.7 km2,布置测线62条,按100 m线距、20 m点距进行数据采集,并对ΔT数据进行化极处理及向上延拓处理。通过ΔT值平面等值线图、ΔT值剖面平面图及化极ΔT值上延平面等值线图等对异常进行定性及定量解译,共解译3个磁异常,自西向东强度增大,烧变岩埋深变浅、厚度变大,反映东部较西部烧变剧烈。结合磁异常的平面特征和地面填图成果,推测异常主要由5号煤层自燃后形成的烧变岩引起,与二维地震成果基本一致。 相似文献
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民间小规模金矿混汞冶炼活动因缺乏环保措施常常造成周围环境严重的汞污染,目前已被认定为全球最大的人为汞污染排放源。福建省德化县山区土壤汞含量异常升高和该地区民间小规模金矿冶炼活动密切相关,对当地土壤总汞、大气总汞污染分布及土壤表面汞释放的调查研究表明:金矿区周边村子稻田土壤汞平均质量分数达(5.180±7.191)mg/kg,距金矿最近民间冶炼活动最集中的邱村稻田总汞质量分数平均值达到(15.658±12.726)mg/kg,随着距离金矿点越远民间冶炼活动减少,土壤总汞含量呈下降趋势。[JP2]区域大气总汞平均质量浓度为(36.4±24.3)ng/m3,邱村大气总汞质量浓度平均值(77.2±42.4)ng/m3;工作区4个土-气界面汞通量均值分别为:华口(109.6±55.9)ng/(m2h),邱村(97.1±36.1)ng/(m2h),大安(63.5±12.6)ng/(m2h),中仙(25.9±23.5 ng/(m2h)。因地形复杂,微气象条件差异及土地利用差异等综合因素制约,土壤汞含量与大气总汞含量、释放通量间没有显著相关关系,华口测点土壤释汞通量最大。工作区民间金矿冶炼活动历史造成当地环境的汞污染及其环境影响将长期存在。 相似文献
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土壤氡气测量主要应用于探测断层的位置、产状、性质、活动性并应用于地震监测预警,与CSAMT测量联合使用可以相互补充、相互印证。本文在铜冶店孙祖断裂雪野段布设3条测线,分别进行土壤氡气测量和CSAMT测量,并在测线推测的氡异常带附近取地下水样品进行氡气测试:通过对各测线氡异常带分布特征分析,结合CSAMT测量反演生成的视电阻率断面解译结果,推断铜冶店孙祖断裂在雪野地区形成数条近平行的次级断裂,呈现随着与主断裂距离越远构造应力逐渐消减,其活动强度越弱,氡异常幅度亦弱的规律。本次研究采取土壤氡气测量与CSAMT测量联合探测断裂取得良好效果,可在各类地质勘查工作中推广使用,尤其在活动断裂勘查方面尤为有效。 相似文献
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塔河县翠岗东查拉班河地区有色金属矿产资源基础预查项目工作目的任务:对塔河县翠岗东地区塔90Hs-8、4号组合异常开展1:5万水系沉积物测量工作,同时开展相应的地质简测。择优05Hs-2异常进行1:2万土壤、激电、高精度磁测及地质简测工作,进一步圈定异常和了解地质背景。并在1:2万土壤异常区选择最好的物化探异常,用槽探、浅并等工程进行查证。综合研究取得地物化资料,对工作区金有色金属矿产资源潜力做出评价。 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet. 相似文献
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《山地科学学报》2014,(4)
<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by 相似文献
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References: 《极地研究(英文版)》2007,18(1):73-83
Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated. 相似文献
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《中国海洋大学学报(英文版)》2014,(3):I0001-I0001
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research 相似文献