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华北地块北缘金、多金属成矿地质背景 总被引：1，自引：0，他引：1
华北地块北缘是我国重要的金、多金属成矿带。根据区域地质建造特点、构造性质将研究区划分为５种成矿地质背景。不同的区域成矿地质背景有不同的成矿特点：变质基底区,主要形成沉积变质改造型ＣｕＦｅＡｕＰｂＺｎ成矿系列;盖层区,主要在中晚元古代沉降区形成ＰｂＺｎ（Ａｇ）沉积成矿系列、ＰｂＺｎ（ＡｇＡｕ）沉积改造成矿系列;地槽区,主要形成中酸性岩浆热液多金属成矿系列,火山－次火山热液金、多金属成矿系列,基性－超基性岩浆ＣｕＮｉ成矿系列;中生代火山断陷盆地,主要形成中酸性火山－次火山金、多金属成矿系列;构造岩浆活动带则广泛形成中酸性岩浆热液金、多金属成矿系列。 相似文献
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潘彤 《地球科学与环境学报》2019,(3):297-315
青海地质环境复杂,成矿条件优越,矿产资源相对丰富,构造上位于秦祁昆构造域和特提斯构造域的交接部位。在对青海已查明资源储量的石油、天然气、钾盐、石盐、Au、Fe、Cu、Ni、Pb-Zn、煤、石墨、大理岩等矿产为主的成矿地质条件进行总结的基础上,根据青海构造演化、岩石建造组合及矿产分布规律,运用成矿系列理论,初步划分出青海矿床33个成矿系列(组)、91个成矿亚系列、60个矿床式。主要成矿系列(组)有柴达木盆地新生代石油-K-Li-B-Mg-Sr-石盐-芒硝成矿系列、三江西北与中生代沉积-岩浆-构造作用有关的Cu-Pb-Zn-Ag-黄铁矿-水晶成矿系列组、东昆仑与华力西期—印支期旋回构造-岩浆-沉积作用有关的Fe-Cu-Ni-Co-Pb-Zn-Au-W-Sn-Nb-Ta成矿系列组、北祁连与加里东期岩浆作用有关的Cu-Pb-Zn-Au-石棉成矿系列、北祁连与前南华纪构造旋回岩浆作用有关的Fe-Pb-Zn-Au-硫铁矿-铬铁矿-石棉-蛇纹岩成矿系列。对每个成矿系列(组)及其分布特征等有关问题进行了讨论,重点对前南华纪、早古生代、晚古生代—早中生代、晚中生代、新生代5个成矿阶段的成矿系列特征进行了分析论述,建立了前南华纪古陆核形成、基底陆壳的板内成矿体系,早古生代板块体制成矿体系,晚古生代—早中生代古特提斯成矿体系,晚中生代新特提斯成矿体系,新生代高原隆升成矿体系。 相似文献
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通过对老厂矿区铅锌矿床中存在的闪锌矿脉和方铅矿脉的地质特征、单矿物特征元素、矿物包裹体成分特征和稳定同位素示踪的综合研究结果表明.二者的成矿物质来源和成因不同。根据基底和盖层中矿化类型的不同、基底容矿构造被盖层沉积覆盖、花岗岩时代、基底不整合面上有Pb元素古次生晕存在的特点,表明基底和盖层中矿床的成矿时代是不同的。矿床中包括了加里东期沉积改造型闪锌矿床成矿系列和岩浆热液型方铅矿床成矿系列,华力西期沉积改造型(铅)锌矿床成矿系列。以上分属于不同时代的三个成矿系列的不同矿床.往往共同叠加在同一容矿断裂构造中.形成一种多时代、多来源、多成因的复合矿床。 相似文献
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列表介绍了与区域成矿背景有关的山东省地层和侵入岩谱系序列,在综合研究其与矿产成因联系的基础上,依据地质事件对成矿作用的控制,初步建立了山东省矿床成矿系列50个。按山东省二级大地构造单元(鲁东地区三级构造单元)和成矿系列排序,建立了山东省区域矿床成矿谱系。依据区域矿床成矿谱系所反映的矿床成矿系列时空演化,结合地壳发展阶段初步总结了矿床成矿系列的演化规律。 相似文献
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西秦岭地区铁矿床分布广泛,类型多样,是进行矿床成矿系列研究的理想地区。按照矿床成矿系列研究的理论与方法,将该区铁矿床成矿系列划分为变质作用铁矿床成矿系列和沉积作用铁矿床成矿系列2个系列6个亚系列,并依据各系列、亚系列含铁建造的时空分布特征、成矿事件、成矿作用类型等地质特征,论述了成矿系列研究在地层分区归属、大地构造属性、区域地质构造发展演化以及区域地质对比研究中的重要作用。 相似文献
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钢屯超单元花岗岩是一种壳幔混源的同源岩浆在单向性和序列性演化的基础上形成的。在空间上岩体呈北东向带状分布，时间上表现为一个完整的成岩系列；岩浆分异演化则呈酸度、碱度增强的趋势，这种完整的成岩系列及酸碱增高的趋势与钢屯超单元成矿相关联，并且形成了钢屯超单元一个完整的成矿系列：Ｆｅ，Ｐｂ，Ｚｎ－Ｆｅ，Ｐｂ，Ｚｎ，Ｍｎ，Ｃｕ－Ｍｏ，Ｃｕ，Ｐｂ，Ｚｎ成矿系列。 相似文献
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宫同伦 《地球科学与环境学报》1991,(1)
本文用动力成矿观点对小秦岭金矿田富矿体的形成提出了新的解释,对本区的动力成矿特点作了较详细的说明。文中联系到地壳演化的不同阶段对金矿的富化过程进行了较深入的讨论,并提出了新的成矿系列。笔者以基础地质、大地构造和同位素年龄资料为依据对小秦岭金矿田含金石英脉的成因提出了与前人不同的新观点,认为它是晋宁晚期岩浆期后热液矿床。 相似文献
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东昆仑石灰沟金矿的花岗岩成矿作用特征 总被引：1，自引：0，他引：1
依据石灰沟金矿地质特征,通过对花岗岩类型划分与构造环境的分析,认为该矿区花岗岩体岩石类型以碱性花岗岩为主,属铝过饱和系列,为A-S混合型花岗岩,起源于地壳与地幔的混熔,是造山带深成活动的产物,形成时代为晚华力西期—印支期,说明金的成矿属于岩浆演化最后阶段的产物,成矿时代应属于印支晚期—燕山早期。 相似文献
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祁思敬 《地球科学与环境学报》1999,21(1):12
从认识矿床在地壳中分布的不均匀性到把成矿与地壳阶段发展联系起来再到阐明成矿有利位置及背景的每一个进展都表明了成矿学研究思想在不断发展和深化。近几十年来,提出来的区域成矿理论和观点主要有活化与成矿、成矿建造分析、板块构造与成矿有利背景、金属省及其区域地球化学背景、区域成矿模式或成矿系列等,了解这些理论观点的内容和思路,不仅是建立一个能被广泛接受的区域成矿学理论体系所必须的,而且对当前的预测找矿工作也仍有指导作用和借鉴意义。在未来一段时间里,成矿学将有较快发展,我国矿床学家给予较多关注的有成矿地质背景和成矿作用演化,成矿动力学、成矿系统建构与分析等研究方向。新的科学思维与新技术方法的引进,是促进成矿学未来发展的有利条件。 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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《极地研究(英文版)》2014,(3)
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 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<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. 相似文献
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《山地科学学报》2014,(4)
<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 相似文献
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References： 《极地研究(英文版)》2007,18(1):73-83
Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated. 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