招平断裂带台上——水旺庄段三维地质模型构建及矿体空间分布规律

招平断裂带是胶东三大控矿断裂带之一,其台上水旺庄段已探明大—超大型金矿床7处,本文利用375个钻孔资料搭建了台上水旺庄段三维地质模型,系统研究区内三维地质结构,基于大数据技术分析了矿体分布和富集规律。在三维空间内各矿区主矿体沿招平断裂带主裂面下盘分布,其中1711号矿体和②号矿体连为一体,为一超大矿体。对建模区内主要矿体进行压缩,统计矿体厚度、品位、厚度×品位的分布和变化规律,矿体品位分布不均匀,整体表现为中间品位相对较高,边部品位较低,矿体厚度沿走向和倾向均呈现厚薄相间变化,矿体品位与厚度相关系数为0.192,矿体品位×厚度的三维分布构成了4处矿化富集区,对矿化富集区进行坡度与矿化强度关系分析,矿体主要富集在构造沿倾斜方向上由陡急速变缓中的转折段和缓倾段,在走向上构造波状变化中的舒缓地段易于矿体富集。     

胶东金翅岭金矿构造控矿规律及找矿预测

金翅岭金矿是胶东招远北部的一个典型石英脉型金矿,构造是金矿最为重要的控矿因素。在前人资料的基础上,综合分析了矿区构造控矿特征,总结了构造控矿规律:矿脉分支复合,表现为NE向矿脉产生SN,NNE向次级矿脉,NNE向矿脉产生NE向次级矿脉;矿体厚度与金品位呈负相关,深部次级矿脉群在P4脉下盘出现;矿脉侧伏角和倾伏向变化处矿体富集,表现为SW向侧伏的P4矿脉,矿体富集于-240 m,侧伏角变大,同时倾伏向由SW向转变为NW向的部位。最后建立了平面和剖面P4矿脉的波形函数,并对深部进行了预测。     

陕西凤县柴蚂金矿2-2矿体矿化规律探讨

柴蚂金矿与特大型金矿——八卦庙金矿毗邻,其金矿类型、矿化特征、富集规律及找矿标志均与八卦庙金矿有惊人的相似性,属于"八卦庙式"金矿。该矿床共分为5个成矿带、20条主要矿体。文章通过对具有代表性的2-2矿体在垂向和横向上矿体厚度与品位的变化规律研究,发现在垂向上2-2矿体矿化中心处于1490中段附近,同时在横向上矿体平均厚度与平均品位具负相关关系,而且具有膨大缩小的特征。     

龙山金锑矿NNE向矿脉力学性质及找矿前景分析

区内NNE向组断裂构造与NWW向组含矿断裂多期次活动历史长,力学性质变换频繁,在印支晚期至燕山早期主成矿期同具扭张性特征,深切幅度大,倾向延深大于走向延长,长深比为2:3至1:10。同处于成矿时间一致的热液运移系统,NWW向组矿脉矿体向NWW侧伏,NNE向组矿脉矿体向SSW侧伏,自地表至深部,矿体厚度增大,金锑品位变富。NNE向构造与NNW向含矿断裂构造一样,具有较大的找矿潜力,从而拓宽了以往仅局限于NWW向含矿构造带找矿空间,为矿山今后找矿提供了思路。     

湖南省平江县黄金洞矿区金塘矿段3号脉明金矿体特征及规律

金塘矿段3号矿脉位于碉堡界倒转倾伏向斜的北翼,受NE向和EW向韧性剪切带断裂联合控制,矿脉由Ⅰ、Ⅱ、Ⅲ号破碎带及蚀变带组成,全长3300 m,倾向南,倾角38~65o。矿脉共圈有14个矿体,矿体主要类型有含金石英脉型、破碎板岩型和含金蚀变型。近年来在3号脉-60 m至-310 m发现大量明金矿体,明金形态复杂,大小各异,含明金的矿体厚度0.6-1.5 m,平均品位约105 g/t。本文主要对3号脉明金矿体的特征、分布情况、成矿原因、赋存规律及对深部探找明金矿体提出个人的一些粗浅认识。     

青海省锡铁山铅锌矿成矿元素物质场结构及深部找矿潜力

青海省柴达木盆地北缘锡铁山铅锌矿是我国大型的喷流沉积型(SEDEX)矿床，赋矿围岩主要是大理岩和片岩，浅部主要为大理岩型矿体，深部主要为片岩型矿体。系统描述了不同矿石类型中铅锌矿体与黄铁矿的空间共生关系、矿体空间形态三维变化规律；利用局部奇异性分析方法、相关性分析方法对矿区Pb、Zn、Ag、Au等成矿元素物质场结构特征及变化趋势进行了系统分析，2种分析方法均可表现元素物质场不同的结构特征，即:Pb、Zn、Au元素整体上沿着矿体的侧伏方向仍然有明显的向深部富集的趋势，且不受大理岩的影响，在片岩中物质场所反映的元素富集程度依然很强；Ag元素整体上从浅部到深部在矿化空间内均有明显的不连续富集特征。锡铁山铅锌矿水平方向上元素分带由远至近(由西向东)依次为Mn-Fe-S-Ag-Pb-Zn-S-Au，垂向上元素分带由上到下依次为Mn-S-Ag-Pb-Zn-S-Au，同时系统研究了成矿元素物质场中元素富集结构的变化规律，分析讨论了锡铁山深部找矿潜力。      

数学地质方法在镇平小岔沟石墨矿区普查勘探工作中的应用

在镇平小岔沟矿区,应用数学地质方法定量地解决了地质问题,并取得了良好成果。在地质普查阶段,利用电测井曲线计算矿石品位,根据电极电位曲线特征建立的二元回归方程式对矿石品位进行计算,其结果,矿石品位合格率达到90％以上,认为,该回归方程可以用于样品品位的计算。通过对矿体厚度数据的概率分析,确定了矿体厚度变化属于偶然性变化,可以用变化系数这一参数衡量矿体厚度变化的复杂程度。对横跨矿区的一条地质剖面的光谱分析结果进行最优分割法计算,为合理划分地层、确定填图单元提供了佐证。     

黔东松桃大塘坡地区南华系大塘坡组锰矿相带及分布规律

在大塘坡矿区钻孔编录与野外地层剖面观察实测的基础上,结合近年来有关大塘坡式锰矿的研究成果,对大塘坡矿区的锰矿相带及分布规律进行了研究。对大塘坡地区含锰岩系、菱锰矿体的沉积厚度等值线以及菱锰矿体的品位等值线研究表明,矿体的走向与大塘坡地区沉积盆地长轴方向一致,为北东60°左右,存在一大两小3个锰矿沉积中心。同时对大塘坡地区盆地中心矿体结构构造的研究表明矿体可分为中心相、过渡相、边缘相3个相带,其中中心相以气泡状和块状菱锰矿为主,伴随有软沉积变形层理等特殊构造,一般为多层矿;过渡相以条带状菱锰矿为主,块状菱锰矿为辅,主要为单层矿;边缘相主要为薄层条带状锰矿与炭质页岩互层,主要为单层矿。该相带分布受古天然气泄漏控制,喷溢口的分布与锰矿沉积中心基本重合,且从中心相到过渡相再到边缘相含锰岩系厚度、矿体厚度以及矿体品位逐渐降低,它们的变化规律保持一致,呈正相关性。      

山东苍山县凤凰山铁矿铁品位统计分析

凤凰山铁矿床位于苍峄铁矿带东南延伸部位,为隐伏矿床,赋存于泰山岩群山草峪组地层中,由太白向斜构造控制。矿床发育南北2条主矿带,赋存矿体5个,规模为中-偏大型沉积变质铁矿。利用该矿区25个钻孔的915件样品的铁品位数据,采用垂向100m的间距分析其品位的平均值、标准差、变异系数和大于工业品位的矿石所占比例等统计参数,探讨了矿体厚度与品位的相关关系以及在走向上的品位变化。研究发现:沿垂向存在2个矿化富集地段,分别为-200～-300m和-500～-600m;沿走向以中部为矿化富集地段。南北2个矿化带厚度与品位沿走向及倾向具有不同的相关变化。     

岑溪市义水银铅锌矿床地质特征及控矿因素分析

文章分析了广西岑溪市义水银铅锌矿床地质特征及控矿因素,认为矿床产于NNW向断层破碎带中,矿体展布方向、延深、厚度及矿石品位严格受断裂控制,矿体与围岩界线明显,矿石主要为压碎状、角砾状结构构造,属中低温热液断裂充填型脉状矿床。     

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.     

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     

Preliminary study on plasma membrane fluidity of Psychrophilic Yeast Rhodotorula sp.NJ298 in low temperature

The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature.     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

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.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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