高精度磁测在山西省繁峙吐楼铁矿区勘探中的应用

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。     

重磁方法在程家村隐伏磁铁矿勘查中的应用

为了验证程家村航磁异常圈闭,对该异常圈闭进行了查证工作,针对该区域铁矿体均呈深部隐伏的赋存状态,以"物探先行,钻探验证"的工作方法开展工作,利用地面高精度磁测扫面确定磁异常圈闭平面形态及位置;对高精度磁测剖面数据进行切线法剖面反演,确定强磁性地质体位置和埋深,再结合重磁剖面联合反演方法,推断强磁性地质体的赋存状态,从而给钻探验证提供依据。通过上述工作,取得了良好的找矿效果,表明重磁方法是深部隐伏磁铁矿勘查中的重要工作手段。     

粤北复杂环境隐伏铅锌矿的物探方法集成

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。     

青海省乌拉斯太地区磁异常特征及成因

乌拉斯太地区处东昆仑南部,属活动区造山带,成矿类型复杂。区内开展的1∶5万地面高精度磁测工作共圈定32处磁异常,其中甲类异常3处,乙类异常5处,丙类异常1处,基本掌握了区内磁异常的特征。通过异常查证工作,利用路线地质调查、地物化综合剖面及磁异常反演进行推断解释,总结异常成因主要为磁铁矿、低品位磁铁矿化绿泥石英片以及中酸性侵入岩体,并初步了解了区内铁、多金属成矿与磁场分布的相关关系。该次工作填补了区域相关资料的空白,为区内开展其他地质工作提供了相关依据。     

济南流海庄铁矿床综合物探特征与分析

采用可控源大地电磁测深(CSAMT)与高精度磁测相结合的综合研究手段,通过对前期高磁资料的常规数据处理,结合此次综合研究剖面资料,以及对已知验证孔的对比研究综合分析,认为高磁性、低电阻为济南流海庄铁矿床隐伏磁铁矿的异常反映。认为该区铁矿体沿闪长岩体与奥陶世灰岩的上下接触界面分布,矿体主体沿接触带向NE缓倾,异常中心可划分为走向近南北,近平行排列的东西2个主矿段,第一矿段位于异常北西部,南东侧为第二矿段。     

高精度磁法在伊昭井田隐伏火烧区探测中的应用

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。     

综合物探方法在济南市章丘地区地热资源勘查中的应用

利用大极距电阻率测深、高精度磁测和音频大地电磁法开展综合物探工作,查明工作区隐伏断裂构造及破碎带位置即寻找深部导热储水构造,推测热储层顶板埋深,圈定低阻异常区。根据当地的地质、地形与施工条件,选择合理的物探方法确定钻井位置,设计钻孔深度,施工钻孔,最终打出了自流量70 m3/h、井口水温41℃的理想低温型热水井。     

福建省德化县金矿区民间冶炼活动相关的土壤与大气汞污染特征

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/m3,邱村大气总汞质量浓度平均值(77.2±42.4)ng/m3;工作区4个土-气界面汞通量均值分别为:华口(109.6±55.9)ng/(m2h),邱村(97.1±36.1)ng/(m2h),大安(63.5±12.6)ng/(m2h),中仙(25.9±23.5 ng/(m2h)。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。      

土壤氡气测量与CSAMT测量在铜冶店——孙祖断裂勘查中应用

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。     

塔河县翠岗东查拉班河金有色金属矿地质、地球物理、地球化学特征

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。     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

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.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

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.     

Foreword

正Rapid changes of Arctic sea ice cover have been in the focus of the international climate research community in recent years.Quite a few of nations have completed a large number of related surveys and research projects in the Arctic Ocean.Up to now,China has performed six research cruises to the Arctic Ocean resulting in a significant volume of research output.Improved knowledge on the atmospheree-sea ice-ocean interactions in the Arctic is a     

Exposure ages and radiogenic ages of ureilite(GRV 024516) and ordinary chondrite(GRV 024517) from Antarctica

The GRV 024516 and GRV 024517 meteorite samples collected from Grove Montains,Antactica are ureilite and H5 ordinary chondrite,respectively.Based on the study of mineralogy-petrology,the cosmic-ray exposure ages and gas retention ages of these two meteorites were determinated and calculated.Their cosmic-ray exposure ages are 33.3 Ma,51.7 Ma,and gas retention ages are 1936.8 Ma and 3720 Ma,respectively.The ureilite contains diamond,graphite and amorphous C,which are mainly carrier of noble gases indicating obviously shock metamorphism effects,which induced 40Ar partial loss.The H5 chondrite indicates thermal metamorphism of parent body,its gas retention age fall the range between 3220 Ma and 4510 Ma of the least shocked H5 chondrites     

Information for authors

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     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<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.     

Journal of Mountain Science(JMS)

<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