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三道湾子金矿床矿石特征及金的赋存状态研究 总被引：4，自引：0，他引：4
三道湾子金矿是与大兴安岭燕山期火山活动有关的浅成中-低温热液金矿,矿石类型主要为石英脉型.矿石的结构为自形-半自形-它形粒状结构、碎裂结构、交代结构、包含结构.矿石的构造为致密块状构造、稀疏浸染状构造、角砾状构造、细脉状构造.矿体浅部金矿物以自然金、银金矿为主,呈裂隙金、粒间金、包裹金分布,金矿物以细粒为主,载金矿物主要为石英;深部富矿段金、银主要以碲化物形式存在,赋存于石英颗粒间或裂隙中.反映了成矿流体的阶段性及层次性. 相似文献
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金家山金矿位于江南隆起带北缘,赋存于新元古代浅变质浊积岩基底岩层中,其成矿结构面为张性或扭张性断层,成矿地质体为角砾岩。矿石工业类型为角砾岩型金矿,矿石矿物主要为毒砂、黄铁矿,少量黄铜矿、闪锌矿、方铅矿、褐铁矿、自然金,矿石结构主要为半自形晶粒状结构、他形粒状结构,矿石构造以浸染状构造为主。通过地球化学工作有效圈出矿致异常,研究区Au元素属显著富集、强烈变异、极强叠加型元素,说明该区地质体遭受的后期各种构造作用叠加对金矿成矿有利,初步认为地球化学配合地质测量和探矿工程可快速找金。 相似文献
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猫岭金矿床成矿构造演化特征 总被引：8，自引：0，他引：8
猫岭金矿是在克拉通变质岩区保存较好的含砷(毒砂)浸染型金矿之一，金矿脉并非单纯的硫化物脉，而是含毒砂-磁黄铁矿-黄铁矿的硅化石英脉，S1面理与金矿脉为同一构造期产物，形成于辽河旋回第一幕构造的伸展滑脱阶段。金矿成矿时代为古元古代，绝对年龄为2000～2200Ma。在金矿成矿期形成的强硅化蚀变圈，因具有不透水性和强硬的岩石力学性质，造成封闭-半封闭的屏蔽环境，使得猫岭金矿的古元古代成矿特征，包括矿石矿物组成、结构构造、铅同位素和铼-锇同位素组成，以及辽河旋回早期的S1面理得以保存下来，免遭后期的构造-岩浆热事件的改造和破坏。 相似文献
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在野外工作的基础上，笔者通过对小秦岭金矿田中西峪–桐峪金矿光薄片鉴定、化学成分分析、电子探针分析等，查明了该矿（带）共有11条含金构造带，主要赋存于太华群大月坪组和于洞沟组，矿床赋矿岩性为黄铁矿–多金属硫化物石英脉、多金属硫化物铁白云石石英脉和蚀变岩，矿石构造主要为团块状、浸染状、脉状、网脉状、星散（星点状）状、条带状构造。载金矿物主要为黄铁矿，次为黄铜矿、方铅矿和磁黄铁矿，脉石矿物主要为石英，其次为绢云母。金矿物以独立矿物形式存在，以粒间–裂隙金为主，粒度大多为0.16～0.32 mm，矿石的结构构造有利于矿物的解离。本区金矿成矿作用主要为热液成矿期，可分为金–黄铁矿–石英阶段、金–黄铁矿–多金属硫化物–石英阶段和黄铁矿–磁黄铁矿–碳酸盐阶段。 相似文献
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河南吉家洼金矿床矿石特征及金的赋存状态 总被引：1，自引：1，他引：0
通过对吉家洼金矿床矿石特征及金的赋存状态的研究,讨论了该矿床的矿石类型、结构构造、物质组成、矿物成分、金的赋存状态等.研究表明,该矿床矿石类型以氧化矿石为主,深部原生矿石逐渐增多.矿石中矿物种类多样,主要金属矿物为黄铁矿,脉石矿物以石英、斜长石、绢云母为主.金矿物主要为自然金,在矿石中分布极不均匀,以粒间金和裂隙金为主要赋存形式,粒度介于0.005~0.1 mm之间,金矿物的成色变化具有阶段性和分带性特征,受成矿温度控制明显. 相似文献
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黑龙江省北大沟金矿床矿石特征及金的赋存状态研究 总被引：1，自引：0，他引：1
黑河市北大沟金矿床是近年来在大兴安岭燕山期成矿带发现的与火山热液有关的浅成中-低温热液型金矿床,矿床的矿石类型主要为石英脉型。矿石的结构为半自形-它形粒状结构、交代结构、胶状结构。矿石的构造为致密块状构造、稀疏浸染状构造、细脉状构造。金矿物为自然金,以裂隙金为主,其次是粒间金,包裹金只占少数,金矿物以细粒为主,载金矿物主要为石英。金的赋存状态较简单,属易浸型矿石,有用组分含量较高,具有较高的工业利用价值。北大沟金矿与三道湾子金矿的矿石特征和金的赋存状态相似,显示北大沟金矿的深部及外围具有巨大找矿潜力。 相似文献
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四川省拉拉铜矿床含金性及金的赋存状态研究 总被引：6，自引：0，他引：6
根据对拉拉铜矿床的矿石结构、构造及矿物共生组合的研究，发现矿石中含有大量自然金和含铂族元素的碲化物。自然金的赋存状态为包裹休金、粒间金、裂隙金。主要的载金矿物有黄铜矿、黄铁矿、叶碲铋矿，含金性最好的岩石类型为只云母钠长片岩。金与成矿元素铜的关系最为密切。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献
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正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.) 相似文献