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杨瑞士 《国土资源导刊(湖南)》2001,20(2):81-84
湖南石门界牌峪地区雄黄矿床中伴有各类矿化角砾岩.从其岩石学、岩石化学、地球化学的特征来看,它是一种由热泉气体及部分物质在封闭还原条件下产生急剧爆发形成的特殊的角砾岩群.主要成因类型有"侵入状"角砾岩、爆破角砾岩、岩溶角砾岩和崩塌角砾岩.常见多种角砾岩叠加,它们是一种极好的控矿容矿载体,具有重要的找矿意义. 相似文献
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本文总结山阳—柞水地区隐爆角砾岩（以下简称角砾岩）的基本特征及其与金矿化关系，此角砾岩是区内重要含矿岩石。讨论了角砾岩的成因、含矿性和形成机制。 相似文献
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鄂尔多斯盆地马五5亚段上部发育风化壳储层,马五6亚段天然气显示良好,发育喀斯特储层.利用岩心、铸体薄片及测井等资料,采用单因素分析、综合编图法,以喀斯特角砾岩划分方案为基础,进行沉积微相、岩溶角砾岩划分,研究岩溶角砾岩相的物性特征及喀斯特储层分布规律.结果表明:鄂尔多斯盆地大牛地气田马五6亚段主要发育裂纹—镶嵌角砾岩相、角砾支撑紊乱角砾岩相、杂基支撑紊乱角砾岩相和未改造原岩4种岩相;裂纹—镶嵌角砾岩物性最好,发育有效储层,其他类型角砾岩相物性较差,储层欠发育;马五6亚段喀斯特储层受岩性及淡水条件控制,云坪微相是储层形成的物质基础,侧向淡水淋滤是喀斯特储层形成的关键因素.该结果为马五6亚段储层预测提供地质依据. 相似文献
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本区拟提出七个成矿预测区。产出的一系列爆发角砾岩型金矿床、斑岩-角砾岩型钼(金)矿床、石英脉-角砾岩型钼铅(金)矿床、破碎带蚀变岩型和石英脉型金矿床应是同源、同期、不同成矿空间的统一体,统称为“祁雨沟式”金矿床。 相似文献
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文章阐述了五台县红表地质特征,对隐爆角砾岩的类型、隐爆角砾岩区物理及化学特征进行研究,同时结合隐爆角砾岩型金矿的找矿标志,探讨了红表勘查区深部找矿的潜力。 相似文献
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分析了韩家峪石膏矿矿体地质特征、矿石地质特征,以及矿床成因,得出了该石膏矿主要含矿层位为马家沟组五段下含膏带,呈层状-似层状产出;矿石类型分为交代型、沉积型和充填型三种类型;地表露头广泛发育膏溶特征;矿床成因为浅水蒸发型形成于潮上带盐沼(萨勃哈)环境蒸发作用,沉积型石膏形成于泻湖环境蒸发泵吸作用。 相似文献
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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. 相似文献
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《极地研究(英文版)》2014,(4)
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 相似文献
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《中国海洋大学学报(英文版)》2014,(4)
<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 相似文献
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《中国海洋大学学报(英文版)》2014,(6)
<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- 相似文献
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Massimo GRECO 《山地科学学报》2014,(6):1383-1384
<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 相似文献
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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. 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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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 相似文献