共查询到19条相似文献，搜索用时 203 毫秒
1.
湖南西北部黑色岩系中的贵金属矿化及找矿 总被引：2，自引：0，他引：2
湖南西北部下寒武统木昌组黑色岩系中蕴藏着丰富的镍钼钒多金属矿床及其伴生的贵金属矿化。可划分为两类岩性组合序列，分析赋存着镍钼－金银矿化和钒－银矿化。有机成矿作用对该类矿床（化）的形成起了主导作用，本区具有良好的成矿前景和找矿潜力。 相似文献
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湘西北黑色岩系中贵金属矿化地质特征及成矿控制因素 总被引：1，自引：0，他引：1
从共生的镍钼钒多金属矿床的地质特征入手，将黑色岩系中的贵金属矿化划分为镍钼－金银矿化和钒－银矿化两类，并通过成矿条件与控矿因素探讨，指出其主导成矿作用和矿床成因以及找矿意义。 相似文献
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湘西北地区镍钼钒多金属矿床及金银矿化的地质特征与成矿条件 总被引：5，自引：1，他引：5
湘西北地区镍钼钒多金属矿床赋矿层位为下寒武统木昌组.可划分为两种岩性组合序列,分别赋存镍钼矿床和钒矿床,并伴生金银矿化,还蕴藏着极其丰富的石煤资源,是湘西北有色及贵金属潜在的成矿区域.属沉积型矿床,而成岩化作用使其成矿物质进一步富集. 相似文献
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湖南西北部下寒武统黑色岩系蕴藏着丰富的镍钼钒多金属矿床及其伴生的Au,Ag,Pt,Pd等贵金属矿化。它是我国新类型的镍钼矿床及贵金属矿化极具找矿潜力的地区。富含有机质和黄铁矿的黑色岩系既是镍钼矿的富集层,也是贵金属矿化的主要富集层。矿床的成矿作用是伴随热水的加入而开始,热水沉积与正常沉积交替期是成矿的高峰期,至正常沉积期结束。生物及生物地球化学作用在黑色岩系的成岩成矿过程中起了重要作用。矿床以同生沉积为主,兼有热水性质沉积特点。其成因应归属于生物地球化学沉积矿床范畴。 相似文献
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贵州省的镍钼钒多金属矿分为岩浆熔离型铜镍矿、热液型多金属矿床中的镍钼钒矿、沉积型镍钼钒矿和次生淋滤型镍钼矿等4种矿化类型。文章重点介绍了沉积型镍钼钒矿的成矿地质特征,分析了其成矿条件及找矿标志,探讨了黑色岩系底部镍钼钒多金属矿层的成因机理,提出了"白烟囱"型的成硅(磷)、成矿、生物爆发的形成机制和被动大陆边缘构造、岩相古地理、深部岩浆岩及断裂构造等控制因素。 相似文献
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８０年代后期在波罗的海科拉半岛南部奥涅加湖地区的铀－贵金属－钒组合矿床上世界上系首次发现。它包括５个矿床，十几个矿化点，已探明了可观的铀、钒、金、铂储量。了解它对开阔我国深入找矿思路有一定帮助。 相似文献
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湘西北下寒武统黑色岩系中贵金属镍-钼-钒矿床的有机成矿作用 总被引：1，自引：0，他引：1
湖南西北部广泛分布的下寒武统木昌组黑色岩系中富含Ni、Mo、V，多处形成了镍-钼-钒多金属矿床（点）。主要可划分的Ⅱ类含矿岩性序列为：①含磷黑色岩系——镍-钼矿床；②碳硅质黑色岩系——钒矿床。研究认为，有机成矿作用对镍-钼-钒矿床的形成起了主导作用。 相似文献
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岩浆隐蔽爆破构造与贵重、有色金属成矿 总被引：13，自引：2，他引：13
研究证明，岩浆隐蔽爆破作用所形成的产物，是一套成因上相互联系而以各具特色的碎屑岩组合。通过对隐爆碎屑岩的研究，将其划分为７种碎屑岩类型，并统称其为隐蔽爆破相岩石。随着矿产资源广泛的开发和研究的深入，愈来愈多的实际资料证明，岩浆隐蔽爆破构造与贵重有色金属成矿有着密切的成因联系；与岩浆隐蔽爆破构造有关，形成了包括Ｃｕ，Ｍｏ，Ｐｈ，Ｚｎ，Ａｎ，Ａｇ，Ｗ，Ｓｎ等矿种在内的一大批角砾岩筒型矿床。受爆破岩筒、震碎带、环状、放射状断裂、裂隙等隐蔽爆破构造及其伴生构造（接触带、捕掳体、破碎带等）的直接控制，成矿作用的形式和矿床类型均具多种多样的特征。 相似文献
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Redox problems in the “metallogenic specialization” of magmatic rocks and the genesis of hydrothermal ore mineralization 总被引：1，自引：0，他引：1
I. N. Kigai 《Petrology》2011,19(3):303-321
Considering the history and current state of the problem of the so-called metallogenic specialization of magmatic rocks, the
paper places emphasis onto various aspects of the genesis of ore mineralization depending on the redox state of magmas (as
a logical continuation of S. Ishihara’s works), fluids, and host rocks. These problems were inadequately poorly explored and
discussed by researchers dealing with ore deposits. Various possible variants of ore-forming redox processes for different
types of mineral deposits, with ore mineralization affiliated to granites (Ta, Sn, W, Mo, and Be) and mafic magmas (Au, Ag,
U, Cu, Zn, Pb, As, Sb, and Hg) and, accordingly, to crustal and mantle origin, are discussed. On the basis of analyzed geological
data, including those published over the past three decades, it is shown that the redox state of ore-producing magmas commonly
significantly impacted not only the ore potential of magmatic complexes but also the genetic type of the ore mineralization.
The redox state of the fluids predetermined the transport and precipitation speciation of metals. Influence mechanisms of
hydrocarbons from sedimentary country rocks and gaseous products of their pyrolysis on ore deposition of various metals are
considered. Understanding these mechanisms can be helpful for predicting the possible precipitation sites of ore mineralization
of noble, radioactive, and chalcophile metals. 相似文献
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V. V. Seredin 《Geology of Ore Deposits》2007,49(1):1-30
Original data and a survey of the literature indicate that Au and Au-PGE mineralization are abundant in coal measures. Anomalous contents of noble metals have been established in basins with various types of basement, composed of granite, volcanic rocks, schist, and limestone. These basins are located in Au-and PGE-bearing ore districts, as well as at a considerable distance from known ore deposits and occurrences. Ore formation in coal-bearing basins may occur during sedimentation, peat accumulation, and diagenesis of organic matter or may be epigenetic. Noble metals are supplied to sedimentary basins as minerals that are transported by water and air and as ion species migrating along with surface and subsurface in-and exfiltration solutions of various chemical and genetic types. Ore mineralization concentrates in coal seams and host sedimentary beds of various grain size, including conglomerate, sand, and clay, as well as in zones of hydrothermal alteration superimposed on basement rocks and the sedimentary cover. The mode of occurrence of noble metals in coal basins is diverse as well (noble metal minerals, isomorphic admixtures in sulfides, and organic compounds). The data presented allow coal-bearing basins to be regarded as promising for economic noble metal mineralization fit for recovery as by-products in the course of coal mining. 相似文献
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A. V. Melnikov S. G. Agafonenko I. V. Babichev Yu. G. Piskunov V. G. Moiseenko 《Doklady Earth Sciences》2013,449(2):380-385
The Upper Selemdzha minerogenic zone, which has the potential for noble metal mineralization in the Upper Amur, has been studied. It is confined to the thick strata of Paleozoic terrigeneous-sedimentary rocks (sandstones, siltstones, clay schists, packages of their thin rhythmical interlayering, sedimentary breccias, and conglomerates) in the Tokura subzone of the Selemdzha-Kerbinsk zone in the Amur-Okhotsk area of the Mongol-Okhotsk system, overlain by Early Cretaceous volcanogenic sedimentary rocks and intruded by Early Cretaceous quartz diorites, granodiorites, and dacites. In the Malomyr and Sagur-Semertak ore clusters, there are a few known potential deposits of noble metals and ore occurrences; when studied and prospected, they can exhibit vein-veinlet noble metal mineralization with rich contents of gold and platinoids in ore columns and metasomatic deposits. 相似文献
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乐德矿带成矿系列与成矿规律 总被引：4，自引：0，他引：4
乐华—德兴矿带是指江西省内呈NE走向的有色金属和贵金属成矿带,带内有丰富的Cu、Pb、Zn、Au、Ag等矿产资源,其中铜储量约占我国总储量的17.5％。 矿带位于扬子地台南缘关帽山地背斜内,广泛发育中元古代双桥山下亚群和轴向呈EW向或NE向的线状基底褶皱。矿带两侧为断层或地块。矿带内有许多韧性剪切带和燕山期中酸性火成岩,呈NE向分布。 矿带有5个矿田,15个矿床,划分为两个成矿系。是根据其成矿控制因素,矿床物质组分,REE含量,S、Pb、O等稳定同位素,以及黄铁矿中的Co、Ni含量和Co/Ni比值。两个成矿系为:(1)Cu-Pb-Zn-Ag(Au);(2)Au。矿系(1)呈简单的水平分带,矿化与燕山期中酸性岩浆活动有关,而矿系(2)的矿化则与韧性剪切带和晚期断层作用直接有关。 相似文献
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秦岭成矿带成矿特征和找矿方向 总被引：15，自引：10，他引：15
秦岭成矿带是我国有色、贵金属工业的重要矿产资源基地,也是最具成矿潜力和找矿远景的地区之一。近年的综合研究工作表明,秦岭造山带是一个多旋回复合大陆碰撞造山带,自太古代以来经历了多种构造体制的转化和多期构造热事件发生,伴随有多个构造成矿旋回,所形成的含矿建造、成矿作用及矿床组合具有多样性。根据成矿时代、构造、建造、成矿作用及矿床组合特征分析,认为秦岭造山带铜、钼、铅、锌、银、金、汞、锑等内生金属矿床主要受7个主要的成矿系统控制,形成了18个主要成矿系列,并对各成矿系列及其典型矿床的地质特征和近几年找矿新发现进行了系统的论述,建立了铜、金、铅、锌、银等矿床系列的区域成矿模式。对区域优势矿种的成矿谱系研究表明,本区成矿在时间演化上表现出明显多旋回性、继承性、新生性和叠加性特征,华力西期与印支末-燕山期是成矿大爆发期,最有利于大型超大矿床形成;在空间分布上,具有明显的侧向和垂向分带性。在此基础上,对秦岭成矿带的成矿潜力及成矿远景区进行了评价和划分,指出秦岭地区热水喷流沉积型与密西西比型铅锌银矿床、微细浸染型与石英脉构造蚀变岩型金矿床、斑岩型钼钨铜矿床及低温热液型汞锑矿床等具有很大的找矿前景。并划分出5个区域成矿远景带和17个重要成矿预测区。 相似文献
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The relationship between noble metal mineralization and carbonaceous rocks (black shales and brown coals) is considered. We have confirmed the previous conclusions of multistage syn- and epimetamorphic formation of gold-bearing deposits in black shales and syn- and epigenetic accumulation of noble metals in brown coals. The gold and PGE in the brown coals of the Verkhnii Amur region and Primorye were presumably derived by disintegration of adjacent ore sources in the Cenozoic. Addition studies and sampling are required at the coal and graphite objects of the Russian Far East to solve this problem. 相似文献
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特提斯成矿域是地球上三大成矿域之一,矿产资源丰富.文章综述了特提斯域内伊朗高原浅成低温热液矿床的地质特征,讨论了成矿事件的时空分布规律以及主要矿床类型.研究表明,伊朗浅成低温热液矿床大部分位于乌兹密尔-杜克塔尔岩浆弧和阿尔博兹岩浆弧.其中,前者主要产出高硫型Cu-Au±Ag矿床和低硫型Au±Ag±Cu矿床,分布较为稀疏,成矿与始新世和中新世热液活动有关,部分高硫型矿化可能与临近的斑岩型铜矿化构成一套斑岩铜成矿系统;后者主要发育高硫型Cu-Au±Ag矿床、低硫型Au±Ag±Cu矿床、中硫型Pb-Zn±Cu±Au±Ag矿床,它们集中分布在西部的Tarom-Hashtjin带和东部Torud-Chah Shirin带,成矿主要发生在始新世,矿体均赋存在火山岩中且明显受断裂控制,但在矿石矿物和脉石矿物的种类、组构特征以及蚀变类型等方面存在差异,金属沉淀均与降温、沸腾和流体混合等密切相关. 相似文献