辽宁省地槽区志留系—奥陶系

辽宁省地槽区的志留系—奥陶系分布于辽宁省北部,奥陶系称下二台群,由下向上分为盘岭组、黄顶子组、烧锅屯组;分布于辽宁省西部的奥陶系称明安山群。志留系下统为巴林桥组,中统为晒勿苏组。下二台群是一套变质的火山岩系夹正常海相沉积层,火山岩的岩石化学成分及岩石结构与甘肃白银厂早古生代火山岩相似。在火山岩系中已发现有多处铜、金矿点,显然辽宁省北部下二台群是寻找铜、金、银的理想地区。     

昌图县下二台岩群的构造-岩层分析

下二台岩群 ,系下二台地区的奥陶纪变质岩系，遭受强烈的韧－脆性变形的改造，并在后期叠加了热接触变质及动力变质作用。经原岩恢复可将下二台岩群分为三个岩组：盘岭岩组，黄顶子岩组及烧锅屯岩组，其原岩建造分别为火山岩建造、碳酸盐岩建造及碎屑岩建造。下二台岩群具有三种不同变形相的递进演化规律，相应形成三种构造群落：顺层固态流变构造群落、弹塑性弯曲构造群落、断裂构造群落。下二台岩群地层层序从构造层次角度推断自下而上应为盘岭岩组、黄顶子岩组、烧锅屯岩组。     

小兴安岭--张广才岭成矿带前寒武纪地层系统及含矿性探讨

黑龙江小兴安岭一张广才岭成矿带大地构造位于西伯利亚板块与华北一塔里木板块之间的天山一兴蒙复合造山区东段。前寒武纪地层系统探讨区内前寒武系出露局限,分为古元古界、中元古界和新元古界。依次为：东风山岩群（含亮子河、红林岩组）和尔站岩群,黑龙江岩群（含大顶子、杨木岩组）,张广才岭岩群（含正沟、红光、新兴岩组）。     

山东省前寒武纪地层形成时代—同位素地质测年的证据

精确同位素地质测年结果表明,沂水岩群形成时代为2 760～2 700Ma,泰山岩群雁翎关岩组、柳杭岩组下亚组和孟家屯岩组形成时代为2 750～2 700Ma,均属新太古代早期;泰山岩群柳杭岩组上亚组、山草峪岩组形成时代为2 600～2 540Ma(被峄山岩套石英闪长岩和傲徕山岩套二长花岗岩侵入),济宁岩群岩浆锆石年龄(2 561±24)Ma,均属新太古代晚期。荆山群和粉子山群的形成时代为古元古代晚期。芝罘群碎屑锆石U-Pb年龄(1 658±32)Ma、(1 792±43)Ma,形成时代为中元古代。云台岩群花果山组碎屑锆石U-Pb年龄800～740Ma,形成时代为新元古代。     

鲁西前寒武纪岩石地层清理意见

本文简述了鲁西前寒武纪地层清理意见，其一，鲁西前寒武系厘定为中太古代沂水岩群、晚太古代泰山岩群、早元古代济宁岩群及晚元古代土门群四个群级岩石地层单位；其二，晚太古代亲山岩群雁翎关组之下建立盂家屯岩组；其三，将晚元古代土门群浮莱山组厘定为砂岩夹页岩组合，石旺庄组厘定为含砂质灰岩、灰岩、白云岩组合。     

鲁西前寒武纪岩石地层清理意见

本文简述了鲁西前寒武纪地层清理意见，其一，鲁西前寒武系厘定为中太古代沂水岩群、晚太古代泰山岩群、早元古代济宁岩群及晚元古代土门群四个群级岩石地层单位；其二，晚太古代亲山岩群雁翎关组之下建立盂家屯岩组；其三，将晚元古代土门群浮莱山组厘定为砂岩夹页岩组合，石旺庄组厘定为含砂质灰岩、灰岩、白云岩组合。     

河南省栾川县鱼库沟铅矿床地质特征及找矿远景

通过对区内成矿地质背景及矿床特征的分析,阐述了本区处于华北地台南缘卢氏栾川台缘断褶带内,秦岭纬向系构造带与北东向新华夏系构造带太行山隆起带的交汇复合部位;矿体产于新元古界栾川群煤窑沟组、鱼库沟组的石英岩、二云片岩、白云石大理岩和下古生界陶湾群三岔口组、秋木沟组钙质砾岩、白云质石英大理岩等地层中;该区大地构造位置独特,地质构造复杂,岩浆活动频繁,围岩蚀变强烈、地球化学异常明显,形成了以Pb,Zn,Mo,Ag等为主的丰富的内生金属矿产,充分证明了该区成矿地质条件良好,找矿远景乐观。     

山东省侏罗－白垩纪岩石地层清理意见

运用多重地层划分进行山东省地层清理研究中，对中生代侏罗－白垩纪岩石地层划分得出一些新认识。提出蒙阴盆地及其周围的汶南组与淄博地区的三台组属同物异名，故泣南组名应废弃。山东省侏罗系只有坊子组、三台组一个地层序列，将二者合建淄博群。并按岩石地层划分原则，以岩石组合特征为依据，对白垩系进行了划分、对比，建立了区域地层格架，理顺了莱阳群、青山群、大盛群、王氏群各单位间相互关系，避免了同名异物和同物异名等现象，４个群共划分组级单位２２个。     

山东省侏罗－白垩纪岩石地层清理意见

运用多重地层划分进行山东省地层清理研究中，对中生代侏罗－白垩纪岩石地层划分得出一些新认识。提出蒙阴盆地及其周围的汶南组与淄博地区的三台组属同物异名，故泣南组名应废弃。山东省侏罗系只有坊子组、三台组一个地层序列，将二者合建淄博群。并按岩石地层划分原则，以岩石组合特征为依据，对白垩系进行了划分、对比，建立了区域地层格架，理顺了莱阳群、青山群、大盛群、王氏群各单位间相互关系，避免了同名异物和同物异名等现象，４个群共划分组级单位２２个。     

钢屯超单元花岗岩演化及成因探讨

钢屯超单元①花岗岩位于燕山台褶带山海关台拱与辽西台陷的交接部位，是燕山期构造岩浆活动的产物。钢屯超单元是在同源岩浆由粗粒→细粒，酸性→超酸性，碱性→过碱性演化基础上形成的一种Ｓ型花岗岩，这种演化是本区Ｍｏ，Ｃｕ，Ｐｂ，Ｚｎ多金属矿形成的主要原因。     

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