山东金刚石原生矿找矿前景探讨

金刚石形成于地幔深处,含金刚石的岩石只是一种运载和保存"工具",凡是来自上地幔的岩石均有可能携带早已形成的金刚石而形成金刚石原生矿床.世界上已知金刚石原生矿除金伯利岩、钾镁煌斑岩型外,尚在橄榄岩、橄榄玄武岩、千枚岩、科马提岩、榴辉岩等岩石中发现了金刚石,可能存在金刚石原生矿新的岩石类型.山东位于华北地台的南东部,鲁西、鲁东基底属A型克拉通,幔源岩浆活动强烈,具备良好的金刚石原生矿成矿地质条件,已获得的大量的成矿信息和找矿线索表明,除已发现的蒙阴金伯利岩型金刚石原生矿外,应该存在着尚未发现的金刚石原生矿,找矿前景广阔,应进一步加强金刚石原生矿勘查工作.     

山东金刚石原生矿找矿前景探讨

金刚石形成于地幔深处 ,含金刚石的岩石只是一种运载和保存“工具” ,凡是来自上地幔的岩石均有可能携带早已形成的金刚石而形成金刚石原生矿床。世界上已知金刚石原生矿除金伯利岩、钾镁煌斑岩型外 ,尚在橄榄岩、橄榄玄武岩、千枚岩、科马提岩、榴辉岩等岩石中发现了金刚石 ,可能存在金刚石原生矿新的岩石类型。山东位于华北地台的南东部 ,鲁西、鲁东基底属A型克拉通 ,幔源岩浆活动强烈 ,具备良好的金刚石原生矿成矿地质条件 ,已获得的大量的成矿信息和找矿线索表明 ,除已发现的蒙阴金伯利岩型金刚石原生矿外 ,应该存在着尚未发现的金刚石原生矿 ,找矿前景广阔 ,应进一步加强金刚石原生矿勘查工作。     

山东金刚石原生矿找矿前景探讨

金刚石形成于地幔深处,含金刚石的岩石只是一种运载和保存“工具“,凡是来自上地幔的岩石均有可能携带早已形成的金刚石而形成金刚石原生矿床.世界上已知金刚石原生矿除金伯利岩、钾镁煌斑岩型外,尚在橄榄岩、橄榄玄武岩、千枚岩、科马提岩、榴辉岩等岩石中发现了金刚石,可能存在金刚石原生矿新的岩石类型.山东位于华北地台的南东部,鲁西、鲁东基底属A型克拉通,幔源岩浆活动强烈,具备良好的金刚石原生矿成矿地质条件,已获得的大量的成矿信息和找矿线索表明,除已发现的蒙阴金伯利岩型金刚石原生矿外,应该存在着尚未发现的金刚石原生矿,找矿前景广阔,应进一步加强金刚石原生矿勘查工作.     

山东省费县朱田地区金刚石原生矿找矿方向探讨

在分析费县朱田地区金刚石原生矿成矿地质条件的基础上,结合最新勘查进展,提出超基性岩体深部、NNE向断裂旁侧及重砂矿物异常点周边可作为今后重点找矿方向,并就该地区金刚石原生矿勘查方法进行了探讨,认为重砂测量法依然是金刚石原生矿勘查行之有效的手段,同时应重视高新技术的应用和找矿新理论的探究,期待形成以大井头岩管为代表的鲁西地区第四金刚石原生矿带,实现鲁西地区金刚石原生矿找矿新突破。     

广西金刚石找矿远景区探讨

文章介绍了广西金刚石勘查历史,已发现的金刚石砂矿特征,并首次对广西全区煌斑岩分布情况、岩性、年代学及重砂矿物进行综合研究。经与其他含矿煌斑岩对比研究,圈出广西金刚石找矿远景区2处,为广西金刚石勘查提供依据。     

二论蒙阴地区金刚石原生矿的形成时代

目前不少学者认为,蒙阴地区金刚石原生矿形成于加里东期。然而这一观点,与依据多年来野外工作取得的实际资料所给出的结论不符。加里东期鲁西地区NW向断裂还不存在,NNE走向的上五井断裂更不会存在,这些晚于加里东的断裂不可能是金伯利岩储存的场所。大量金伯利岩岩脉、岩管的展布特点,岩体的完好程度,以及它们与上述断裂的相互关系,和金伯利岩切穿辉绿岩、斜长煌斑岩、正长斑岩等,都说明了金刚石原生矿的形成时代不是在加里东期,而是在中生代后期。     

三论蒙阴地区金刚石原生矿的形成时代

该文以地质基本事实为依据,以地质构造发展史为主线,结合华北地台奥陶纪后演化史,以及石炭纪以后古金刚石砂矿储集层为佐证,再加金伯利岩切穿辉绿岩和煌斑岩脉的实证,都显示出蒙阴地区金刚石原生矿形成时代不在奥陶纪而在中生代。     

湖南省宁远县毛梨坳云煌岩的新发现

0前言毛梨坳云煌岩出露于湖南省宁远县城北约31km的睦塘乡毛梨坳(见图1),由11个规模大小不等的岩体组成,出露通过宁远毛梨坳云煌岩岩石学、矿物学、地球化学特征综合分析研究,发现其具有与国内外钾镁煌斑岩或金伯利岩相似的岩石矿物和地球化学特征。湘南地区深部地球物理资料揭示,将扬子地台南界划为临武—郴州—茶陵—萍乡断裂带一线较为适宜。该断裂带的西北部应为扬子地台边缘活动带,即为P型克拉通,具备钾镁煌斑岩型金刚石原生矿的成矿地质条件。将毛梨坳云煌岩确认为金云母钾镁煌斑岩具有重要意义,这为部署该区金刚石原生矿勘查工作提供了重要信息。     

山东省蒙阴地区金刚石原生矿形成时代的讨论

到哪些地方去找未发现的金刚石原生矿,这就涉及到金刚石原生矿的形成时代问题。正确认识蒙阴地区金刚石原生矿的形成时代,不仅有重要的理论意义,而且具有重要的现实找矿指导作用。地质证据表明,蒙阴地区金刚石原生矿形成时代为白垩纪,同位素测年表明,蒙阴地区金伯利岩形成时代远早于白垩纪,通过对以往地质资料的研究,认为同位素测试年龄是多解性的,应结合相关地质证据确定其形成时代。     

金刚石指示矿物的找矿意义研究—以江苏张集地区发现金刚石原生矿为例

金伯利岩中的石榴子石、铬铁矿和铬透辉石是寻找金刚石原生矿的重要指示矿物。根据主要化学成分TiO2,Cr2O3,FeO,MgO,CaO的含量，将石榴子石分成G1～G12十二组。该次研究区内石榴子石为橙色系列，经电子探针测试，G5组31粒，G4组18粒，G8组7粒，G3组1粒，其中G4组中Na2O含量＞0.07%的有4粒，属含钠镁铝铁铝榴石，且15csy034石榴子石为含金刚石金伯利岩。研究区内1粒铬铁矿为S5组贫钛富镁高铝铬铁矿，属非金伯利岩和非钾镁煌斑岩铬铁矿；研究区内发现的2粒铬透辉石，为低铬富镁透辉石。在研究指示矿物特征的基础上，在四山村北新发现编号分别为1,2,3号3个煌斑岩岩管和编号为4号的1个煌斑岩脉，并在2号岩管角砾岩中，选获直径为0.2mm左右的金刚石1粒。尤其是石榴子石标型矿物的研究为煌斑岩岩体的发现起到重要指导意义，进一步明确了找矿方向，减少了找矿的盲目性。     

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.     

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 comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose     

JOURNAL OF OCEAN UNIVERSITY OF CHINA

<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail     

Information for Authors

<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 results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo-     

Hydraulics and Hydrology in Mountain Areas

<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a     

Sea ice thickness measurement in spring season in Bothnian Bay using an electromagnetic induction instrument

As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m.     

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