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1.
一、宝玉石矿产资源概况及其成矿特征 （一）宝石类 1．红、蓝宝石（刚玉、AL2O3）坡积-洪积型砂矿多分布于牡丹江上游、穆棱河水系河谷中，明显受敦-密深大断裂带及第三纪玄武岩控制。伴生矿物有：红锆石、紫苏辉石、普通辉石、顽火辉石、顽火透辉石、镁铁石榴石、镁铁尖晶石、钛铁矿、磁铁矿、镁铁橄榄石、歪长石等。上述矿物共生组合呈深源捕虏晶见于第三纪碱性玄武岩中。黑龙江红、蓝宝石成矿带，属我国大陆东部新生代蓝宝石成矿带北段，成矿条件好，储量丰富，为我国少有的红、蓝宝石共生矿带。该类型矿床以穆棱县红、蓝宝石砂矿为代表，以下简述其特征。 相似文献
2.
蓝色或其他颜色(红、粉红除外)美丽透明无瑕的宝石级刚玉称蓝宝石。它是世界五大珍贵宝石之一。我国过去不产蓝宝石,自本世纪70年代末海南岛发现蓝宝石后,迄今我国已陆续发现若干蓝宝石产地。山东昌乐蓝宝石:原矿和砂矿均有。蓝宝石主要赋存于新生代碧玄岩中。含蓝宝石的玄武质岩风化后形成残坡积和冲洪积砂矿床。原石多呈深蓝色,少数呈蓝、浅蓝、黄绿、蓝绿、棕等色。呈腰鼓状、桶状;砂矿多呈浑圆粒状、碎块状、六方短柱状。粒径一般5～10mm,大者达30mm;一般重10～25ct。蓝宝石具玻璃光泽,折光率1.762～1.773,多色性明显,一轴晶负光性,个别为二轴晶正光性,2V≈5°,比重3.98～4.01。该矿分布广、储量大,最大缺陷是蓝宝石颜色太深,据报道改色处理已获得成功。目前当地已拟定了“蓝光计划”,成立了 相似文献
3.
《东北石油大学学报》2020,(2)
根据钻井、测井和三维地震等资料,建立渤海海域石南陡坡带多期砂砾岩扇体沉积成因模式,采用时频分析技术,结合井震识别标志,划分砂砾岩扇体沉积期次;利用瞬时相位处理和沉积演化模拟方法,精细刻画每期砂砾岩扇体展布特征。结果表明:石南陡坡带发育4期砂砾岩扇体,从早期到晚期总体具有持续性后退、范围缩小的特征。不同期次扇体展布规律存在差异,陡坡带中西部发育4期砂砾岩扇体,展布范围较大,东部发育3期扇体,展布范围较小。研究区西部、中部和东部的扇三角洲前缘没有叠置,砂砾岩扇体之间连通性较差。石南陡坡带有2个主力油层,分别为第3、第4期砂砾岩扇体。该结果为类似低勘探程度区油气勘探开发提供参考。 相似文献
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以渤南北带沙三 — 沙四段砂砾岩储层为例,结合岩心 、测井资料,利用铸体薄片 、扫描电镜 、CT扫描等方法,研究砂砾岩储层特征及发育主控因素.结果表明:沙三—沙四段砂砾岩储层储集空间主要为溶蚀孔、粒间孔、贴砾缝和微孔,储层物性整体偏差,具有低孔低渗的特征;储层孔隙演化与成岩演化密切相关,早成岩阶段压实作用导致孔隙减少,中成岩阶段受不稳定组分的溶蚀,溶蚀孔成为砂砾岩储层的主要储集空间;砂砾岩储层主要受控于原始组分和溶蚀作用,其中富含不稳定组分的火山岩岩屑是物质基础,有机酸的溶蚀作用是储层发育的关键;受大颗粒支撑作用影响,在扇中的细砾岩相中局部存在弱压实带,原始孔隙发育,为后期酸性流体进入提供通道,溶蚀孔隙更发育,距离边界断层1～2 km的扇中是优质储层发育区.该结果对研究区砂砾岩储层特征研究具有借鉴意义. 相似文献
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东昆仑造山带中发育的NW向线性构造带具有等间距特征 ,其组合以区域剪切带为主体 ,显示多层次、多期次及深切性区域深断裂的基本属性。是具隐爆特征的镁铁质岩 -闪长玢岩组合的浅成杂岩体和五龙沟、托克妥金、铜矿床的导岩、导矿通道及赋存场所。NW向线性构造带是东昆仑地区寻找五龙沟玢岩型金矿床的重要标志 相似文献
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裴先治 《地球科学与环境学报》1992,(3)
南秦岭碧口地区韧性剪切带广泛发育在中元古代碧口群内,呈NEE～SWW向延展,向南倾斜。韧性剪切带内广泛发育有拉伸线理、S-C构造、剪切褶皱、鞘褶皱、剪切透镜体构造以及旋转碎斑系、多米诺骨牌式构造、不对称微褶皱等不同尺度的运动学标志,剪切指向表明韧性剪切带运动方式为自南而北的逆冲型。构造式样的不对称及L-S构造岩的发育表明剪切带为区域非共轴变形机制,对剪切带形成的温压条件和形成时代做了定量分析。 相似文献
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针对西南某大型水电站地下厂房岩锚梁岩台区节理发育的特点,并考虑辉绿岩脉等软弱带的影响因素,结合现场调查,
利用关键块体理论方法分析得出开挖过程中岩台主要破坏模式为滑动、滑移-拉裂、弯曲-拉裂以及辉绿岩脉松动溃散4种,其
中,上、下直墙的陡倾角结构面组合特征及辉绿岩脉的发育直接影响岩台的成型与稳定,开挖过程中针对各发育特征采取针对性
支护措施;为验证分析的可靠性,结合现场变形监测资料分析表明:岩台和岩锚梁混凝土结构之间总体黏合度较好,而岩台开挖破
坏段和辉绿岩脉发育区及影响带处的黏合度相对较差,需进一步加强变形监测,必要时采取相关补强措施。 相似文献
利用关键块体理论方法分析得出开挖过程中岩台主要破坏模式为滑动、滑移-拉裂、弯曲-拉裂以及辉绿岩脉松动溃散4种,其
中,上、下直墙的陡倾角结构面组合特征及辉绿岩脉的发育直接影响岩台的成型与稳定,开挖过程中针对各发育特征采取针对性
支护措施;为验证分析的可靠性,结合现场变形监测资料分析表明:岩台和岩锚梁混凝土结构之间总体黏合度较好,而岩台开挖破
坏段和辉绿岩脉发育区及影响带处的黏合度相对较差,需进一步加强变形监测,必要时采取相关补强措施。 相似文献
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从气源岩、储层、圈闭等方面分析了惠民南坡的天然气成藏条件,认为该区烃源岩条件良好,有古近纪的暗色泥岩和石炭-二叠纪煤系地层作为气源岩,同时该区深大断裂发育,岩浆活动强烈,还具有充足的非烃气源;地层发育全,沉积体系多,发育多种类型的储集层,形成6套储盖组合,具备天然气聚集成藏的良好地质条件.研究表明,曲堤地垒和济阳地堑东部的古生界圈闭是深层气勘探的有利方向,非烃气的主要勘探方向是王判镇潜山带的新近纪地层构造圈闭和浅层“亮点“岩性圈闭. 相似文献
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出露于甘肃康县南部阳坝镇一带的阳坝岩体具有典型的岩浆混合特征,岩体中暗色微粒包体发育,主要类型为暗色细粒微粒闪长质及石英闪长质岩浆包体,岩浆包体与寄主岩石界限清晰。岩浆包体具淬火结构:角闪石呈长柱状,黑云母呈长条片状,磷灰石呈针状,包体中出现石英颗粒集合体及发育熔蚀环的斜长石捕虏晶。岩石学、地球化学研究表明,微粒闪长质包体的(La/Yb)N、Rb/Sr值都比寄主岩石高,且铕亏损程度更大,包体和寄主岩石的Mg#高(寄主岩石Mg#=50.8~54.5,暗色包体Mg#=55.6~60.1)。结合岩相学特征可以认为,暗色微粒包体可能是幔源的高温偏基性岩浆侵入到花岗闪长质岩浆中淬火结晶的产物,在此过程中,花岗质岩浆受到幔源物质混染,表明在中三叠世,扬子板块西北缘曾发生壳-幔混合作用。 相似文献
10.
西藏双湖角木日地区发育一套典型的造山带混杂岩,包括陆源复理石、海山块体、蛇绿岩块体、外来岩片、洋壳残片和高压变质岩块体等,其总体经历了强烈的构造混杂和变形变质作用。通过多年来在该区区域地质调查和填图工作实践,以对该区混杂岩的划分和合理建立混杂岩填图单位为目的,采用大比例尺物性填图结合构造填图等方法,结合露头尺度岩块与基质变形和变质调查,初步总结出适合该区造山带混杂岩的地质填图思路:依边界断裂为界划分岩片级构造单元,在岩片内部基质和外来岩块划分基础上建立混杂岩填图单元,将混杂岩作为地质实体进行构造填图,重视物性填图,造山带混杂带填图综合采用构造填图与物性(岩性)填图有机结合的双重填图法,表达客观存在的地质体,在角木日混杂岩地区区域地质调查中达到了较好的填图效果。 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
13.
《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
14.
《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
15.
《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
16.
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
17.
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
18.
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
19.
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
20.
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