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建瓯奖坑金矿（化）体呈似层状、脉状、透镜状产于早元古代大金山组变质岩推覆于中生代早侏罗世梨山组的缓倾角断裂带上及大金山组变质岩内陡倾角断裂中。成矿物质来源于变质岩,成矿热液有变质热液和推覆运动热液,金矿主要成因类型为混合岩化变质热液改造型金矿床。 相似文献
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猫岭金矿床位于辽宁省盖县境内,地处华北地台东南缘。矿床的成矿物质来源于辽河群。成矿热液为吕梁期变质热液。金矿化带的展布受基底褶皱构造和剪切带构造控制,矿化类型以含硫化物石英脉型和硫化物细脉浸染型为主,矿石最大特点是含金硫化物石英脉同围岩糜棱岩化千枚岩同时卷入褶曲变形,金主要以裂隙金产于毒砂和磁黄铁矿中。对猫岭金矿床成因的认识,过去许多学者认为,辽南地区的金矿成因均与中生代构造岩浆活动密切相关,而猫岭金矿的发现,提出了一种新的观点——辽南地区早元古代可作为一个重要成矿期,揭示了辽南一种新的金矿类型——变质热液含金剪切带型。 相似文献
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华北地块北缘金矿床类型及成矿系列 总被引：3，自引：0，他引：3
华北地块北缘是我国金矿的主要产地之一。其金的成矿地质背景复杂,主要可分为变质基底区、地槽区、盖层区、中生代火山断陷盆地、构造－岩浆活动带５种类型。该区大部分金矿床与中生代构造岩浆活动有关。以成矿作用为主要依据将华北地块北缘金矿床划分为三大类：一类是侵入岩浆热液型金矿床;一类是火山－热液型金矿床;第三类是沉积－改造型金矿床。结合成矿地质背景分析和矿床类型的划分,将华北地块北缘金矿床划分为三个系列组合 相似文献
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热液金矿床在独联体国家的分布及成矿系统的产矿力 总被引：1，自引：0，他引：1
对独障体各国热液金矿床分布的分析表明,晚太古代、元古代、古生代、中生代和新生代成矿期金矿化的强度不相上下。对独联体各国的含金性图进行了整理。评价金矿化发育强度的基础主要是大型（〉１００ｔ）金矿床总储量（开采余下的储量）数据。将热液金矿床划分了１６个地质成因类型;其形成与不同种类的成矿系统有关。评价了各种系统的极限产矿力,普通系统其值可以达到４０００ｔ金。讨论了岩浆系统和变质系统的概念。得出了大型矿 相似文献
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新疆西准噶尔地区不同类型金矿床Rb—Sr同位素年代研究 总被引：27，自引：2，他引：25
西准噶尔地区是新疆最重要的金矿区之一。已发现大、中、小型金矿床１０余个,金矿化点数百处。矿石类型有含金石英大脉开明、石英网脉开明和蚀变岩型。矿床成因类型有４种：一册热液型,其成因与区内早－中石炭世火山作用有关;二为潜火山热液型,与中酸性斑岩体侵位有关;三为岩浆热液型,与花岗质岩浆的侵位有关;四为动力变质热液型,沿断裂带分布于蚀变玄武岩中,系区域动力变质作用的产物。成矿作用及相关地质事件同位素年代学 相似文献
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王建国 《矿物岩石地球化学通报》1991,(3)
华北地台是我国重要的金矿产区。其金矿床类型有沉积变质改造型金矿(辽宁四道沟金矿),变质热液型金矿(夹皮沟、金厂峪金矿,混合岩化热液型金矿(玲珑、焦家金矿),重熔、同熔岩浆热液型(金矿峪耳崖金矿)(朱奉三,1989),以及火山及次火山热液型金矿(奈林沟、二道沟金矿)。现有研究资料表明,华北地台五种类型金矿床为华北地台地壳演化过程中形成的一种特殊金矿床系列,该成矿系列具有如下特征:矿源均来自于太古界变火山岩;矿体围岩没有专属性,即只要构造条件有利,各种岩石均成矿;所有类型金矿床均与构造-岩浆活动有关; 相似文献
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应云南省地质学会矿床专业委员会的邀请,吉林冶金地质勘探公司副总工程师程玉明同志于1984年3月15日在昆明作《中国金矿成因类型、成矿特点及找矿标志》的学术报告。他以我国已知金矿床地质资料为依据,从找矿勘探的实际出发,总结出金矿成因的复成因性、多元性、叠生性、层控性及多旋回性,强调了成矿过程中广义热液作用的特点。他将我国金矿床分为七个成因类型及十八个亚类,每类均有典型矿例并概括了各类的主要特征。七个成因类型是:岩浆热液金矿床,火山——次火山热液金矿床,沉积——变质金矿床,变质——热液金矿 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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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献