共查询到20条相似文献，搜索用时 109 毫秒
1.
山东省BIF型铁矿分布较为广泛,其中鲁南地区苍峄铁矿带是全省重要的BIF型铁矿带之一,该含矿建造赋存于新太古代泰山岩群山草峪组中。本文在对苍峄铁矿带中典型矿床进行剖析的基础上,对铁矿带西延隐伏区进行了分析研究,认为该隐伏区BIF型铁矿成矿地质条件优越,且该区高磁异常较为明显。通过对该类型铁矿矿床成因及找矿预测模型研究,并综合该区地质特征、物探异常特征和铁矿成矿规律等要素共圈定6个铁矿找矿靶区,即B类找矿靶区为涝坡南找矿靶区、马头西找矿靶区、山湾东找矿靶区、东凫山北找矿靶区、胡埠找矿靶区;C类找矿靶区为张庄找矿靶区;本次研究工作为该区今后铁矿勘查工作提供了依据。 相似文献
2.
小闫庄铁矿位于鲁西苍峄铁矿带中部,属"鞍山式"沉积变质型铁矿床,矿体隐伏于地下90~403m,赋存于新太古代泰山岩群山草峪组地层中。矿床由2个矿体组成,矿体呈鞍状、似层状近平行产出,矿体的展布受石闫背斜控制,走向NW,倾向S或N,倾角33°~52°。含矿岩石为磁铁角闪石英岩及磁铁石英角闪岩,黑云变粒岩与黑云角闪片岩为矿体顶底板围岩,矿石工业类型为需选弱磁性贫铁矿石。在阐述小闫庄铁矿床地质特征基础上,总结出铁矿找矿标志,建立了预测找矿模型,探讨了矿床成因,为区域内寻找同类型铁矿具有一定借鉴意义。 相似文献
3.
苍峄铁矿带为山东省典型的"鞍山式"铁矿成矿带,其后期改造作用剧烈,控矿因素复杂。带内先后发现和评价了多个大、中型铁矿床,现区内露头及浅部矿体已基本查明,探求铁矿石资源量逾9亿t,仍未完全控制该矿带的延长和延深规模,其深部及外围隐伏资源潜力巨大。以往勘查工作侧重于各区段浅部矿体特征和规模的控制评价,对矿带赋存规律和找矿方向的研究存在不足。该文结合矿带内已查明矿床特征,对区内基底褶皱构造和断层构造开展了分析研究。基于褶皱控矿理论,将苍峄铁矿划分为5个主含矿带,以次级截矿断层为界,将各含矿带自西向东分为3个区段。从断层构造对控矿褶皱及含矿带的后期改造入手,对原始控矿褶皱进行了恢复重建。验证了太白向斜、石闫背斜、辛庄向斜和后大窑背斜为连续产出的复式褶皱,因褶皱构造向西倾伏,致使辛庄向斜向东剥蚀缺失,石闫背斜和后大窑背斜向西隐伏深潜,并有继续向西延伸的可能。进而分析了区内找矿远景,划分3个赋矿远景区,指明了该区今后的重点找矿方向。 相似文献
4.
杨家堡子铁矿位于山东省枣庄市峄城区峨山镇,隶属苍峄铁成矿带,矿体赋存于新太古代泰山岩群山草峪组上部的变质岩中。该矿床内圈定磁铁矿体11个,求得铁矿石(333)资源量3 378.2万t,矿床平均品位TFe 33.30%,mFe 22.64%。主矿体为Ⅲ-6矿体,占矿床总资源量的83.69%,其长度1 137 m,最大斜深1 065 m,埋深707~1 369m,形态复杂程度中等,品位变化属均匀类型。含矿岩石为磁铁石英角闪岩。矿石中的主要有用组分为Fe,伴生元素含量较低,均无综合回收利用价值,有害组分S、P的含量均较低,经选矿后可达到炼钢及炼铁要求。矿石结构主要有粒状变晶结构和柱状变晶结构;矿石的构造主要为条带状构造,块状构造的矿石较少,但品位相对较高。矿石自然类型为原生磁铁矿石,工业类型属需选磁性铁矿石。该矿床成因与苍峄铁矿一脉相承,为典型的BIF型铁矿。根据区内以及邻区的见矿情况结合磁异常特征分析,杨家堡子矿区有良好的找矿前景。 相似文献
5.
山东省东平-汶上铁矿成矿带是鲁西重要的成矿带,区内已发现李官集、彭集等多个大中型铁矿床,探明了铁矿石资源量超过12亿t。通过收集东平-汶上地区基础地质调查、区域重磁、矿产勘查、科研成果等资料,分析了区内地层、构造、岩浆岩及区域航磁异常特征、重力异常特征与铁矿床的对应耦合关系,提出了矿床的3个控矿因素:即控矿地层(泰山岩群雁翎关组、山草峪组,地层控矿专属性)、控矿构造(同斜复式背斜构造)、控矿岩浆岩(改造和破坏了铁矿带的完整性),通过对成矿区带样品采集测试,分别从主量元素、稀土元素、微量元素、原岩恢复、变质岩构造背景等方面进行系统分析对比,探讨了该区铁矿床为海相岛弧火山——沉积变质成因。 相似文献
6.
7.
旧县地区位于东平县城区西北部,东平湖的东北部。隐伏发育泰山岩群山草峪组黑云变粒岩、斜长角闪岩、条带状磁铁角闪石英岩等,是铁矿体的主要赋矿层位。发育2条NNW向断裂构造,岩浆岩仅分布有新太古代傲徕山序列条花峪单元和中生代沂南序列铜汉庄单元。研究区位于汶上东平阿城NW向区域航磁测带的北段,磁场等值线分布比较均匀,规律性较好,以东、北、西侧为低背景,中、南部相对较高,圈定1处走向NW—SE近椭圆形异常,发现2个铁矿体。矿体呈层状赋存于新太古代泰山岩群山草峪组中下部,为沉积变质型铁矿,赋矿岩石为条带状磁铁石英岩、角闪磁铁石英岩。 相似文献
8.
单县铁矿是近年来在鲁西南地区查明的典型铁矿床之一;该铁矿位于巨厚覆盖层下,其地质特征、地球物理特征、矿床特征和矿体特征等方面均已查明,但成矿时代一直没有精确的定年数据支持。该次研究工作对单县含铁建造中的黑云变粒岩进行锆石SHRIMP U-Pb测年,测年结果显示该含铁建造形成于(2 503±6)Ma、(2 512±6)Ma,属新太古代晚期。通过与鲁西地区相关铁矿地质特征对比研究认为,单县铁矿与苍峄铁矿带、东平-汶上铁矿带的含矿建造相同,其赋矿地层为新太古代泰山岩群山草峪组,均属"苍峄式"沉积变质型铁矿。由于该山草峪组含矿建造在鲁西隆起区内广泛分布,通过对区内地质特征和物探异常的对比进行选区研究,利用单县地区铁矿的勘查经验并选取有效的勘查技术手段,有望在周邻地区的巨厚覆盖层下发现新的铁矿找矿靶区。 相似文献
9.
山东省10年找矿突破战略行动开展以来,先后在鲁西莱芜和齐河-禹城深覆盖区取得了高品位矽卡岩型铁矿重大找矿突破。莱芜地区矿山岩体周边覆盖区发育有明显的航磁异常,通过对牛泉覆盖区磁异常和地质特征综合研究,认为该区具备良好的矽卡岩型铁矿成矿地质条件。并通过异常查证和系统的钻探施工,在牛泉覆盖区探明了一处中型矽卡岩型铁矿床。本文在总结勘查成果的基础上,分析了矿床主要成矿条件,探讨了找矿标志,对成矿有利部位进行了简单预测,以期为莱芜地区矽卡岩型铁矿下一步勘查工作提供帮助。 相似文献
10.
11.
12.
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