内蒙古查干哈达庙块状硫化物型铜矿床类型的确认及其义

经研究确认,内蒙古查干哈达庙铜矿床属于块状硫化物型富铜矿床。该矿床类型的首次确认,为华北陆块北缘寻找古生代块状硫化物型富铜矿床提供了例证。查干哈达庙铜矿床位于华北陆块北缘,赋矿地层（即含矿岩系）为石炭系上统本巴图组流纹质凝灰岩、凝灰质板岩,其上为条带状结晶灰岩、生物碎屑结晶灰岩。含矿岩系中存在硅质岩、含铁硅质岩、碧玉岩及萤石重晶石矿层。硫化物矿体呈层状、似层状,产于流纹质凝灰岩、凝灰质板岩岩层中,产状与岩层产状一致。矿床含矿岩系具有＂火山碎屑岩、硫化物矿体、碧玉岩＂的＂三位一体＂特征。矿石具有条带状、层纹状构造。矿石中主成矿元素为Cu,伴生有益元素为Au,S,Pb,Zn,铜矿石品位较高,属富铜矿。矿床地质特征表明其属块状硫化物型铜矿床。该类型矿床的找矿标志是,在海相酸性火山岩及碳酸盐岩之间,地表存在与硅质岩共存的黄钾铁矾、铁帽型硫化物氧化带;具有以铜为主的铜、锌组合的化探异常;具有低阻高极化的物探异常。     

安徽铜陵冬瓜山大型铜矿：海底-喷流沉积与矽卡岩化叠加复合过程

冬瓜山铜矿是长江中下游成矿带铜陵矿集区内的一个大型铜矿.该矿床被惯称为矽卡岩型矿床,但具明显的层控特征.主矿体呈层状、似层状,赋存于上石炭统碳酸盐建造与下伏上泥盆统砂岩建造的接触带附近,主要由一系列层控块状含铜硫化物透镜体、含铜矽卡岩透镜体、磁铁矿矿囊以及层状含铜黄铁矿-蛇纹石矿席组成.主矿体的底部为根植于上泥盆统砂岩...     

武山铜矿床的地质特征及成因

概述了武山铜矿床的地质特征。按矿体的空间分布、控矿因素、矿体特征,矿区可分为南、北两个矿带、三种矿体。通过对块状硫化物铜、硫矿体,含铜斑岩型矿体、夕卡岩型铜矿体的控矿因素及矿体特征、矿石类型及结构构造、矿石物质成分及变化规律、硫同位素组成、成矿温度及成矿时代、近矿围岩矿化蚀变等的研究,讨论了矿床的成矿作用。认为武山铜矿床有两个成矿期,北矿带的块状硫化物铜、硫矿体是海西期海底火山喷气—喷溢沉积的块状硫化物型矿床;南矿带的含铜斑岩矿体和含铜夕卡岩矿体是燕山期的产物。武山铜矿床是复成因的矿床。     

广东玉水铜多金属矿床流体包裹体特征及地质意义

广东玉水铜多金属矿床位于华南MVT(密西西比河谷型)铅锌矿床成矿带东段,铜铅锌矿体主要呈不规则囊状产于下石炭统忠信组滨海相石英砂(砾)岩和上石炭统壶天群白云岩之间,少量呈不规则脉状分布于白云岩中。其主矿体中铜的品位极高,2013年入选品位为15.5%;矿石主要呈块状,少量浸染状。矿石矿物主要包括黄铜矿、斑铜矿、辉铜矿、方铅矿、浅色闪锌矿、黄铁矿、赤铁矿、磁铁矿等,主要脉石矿物为白云石、方解石,局部偶见石英。发育赤铁矿-磁铁矿和硫化物两个成矿阶段。选取主成矿阶段——硫化物阶段硫化物矿石中的闪锌矿和石英进行流体包裹体研究,结果表明:玉水流体包裹体主要以气液两相包裹体为主,气液比5%~20%,均一温度范围为90~289℃,其中闪锌矿中流体包裹体均一温度90~289℃,石英中流体包裹体均一温度110~287℃,方解石中流体包裹体均一温度125~210℃,包裹体盐度范围集中在8%~15%。激光拉曼探针测试表明流体包裹体气体成分主要是H_2O,个别气相成分CO_2。流体包裹体研究,结合矿床地质地球化学研究成果表明玉水铜多金属矿床是一个层控的低温热液型矿床。     

梅县玉水铜铅锌（银）矿床成矿机制及找矿标志

玉水铜铅锌（银）矿床为受地层和断裂构造共同制约的块状硫化物型层控矿床,主矿 要为海西其海相火山沉积的层状矿体,定位于壶天组（碳酸盐岩）底部。北东东向张裂性同生断裂（Ｆ２３）是主要的控矿、导矿断裂;由断裂向南,矿体厚度逐渐减薄、矿石品位逐渐贫化。矿层特定的赋存位置、伴生的碧玉岩－赤铁矿岩、浸染状铅锌铜矿化和碎屑岩顶部的“面状”石英岩化等,是该类型矿床的直接找矿标志。     

初论云南易门地区凤山铜矿床刺穿构造岩-岩相分带模式

以云南易门式凤山铜矿床为例,应用刺穿构造岩-岩相学填图方法,解剖了控矿刺穿体的识别标志、物质组成、类型、内部结构、构造岩分带等特征。通过控矿刺穿体与非控矿刺穿体的对比研究,建立了控矿刺穿体的构造岩-岩相分带模式：从构造刺穿体→灰白色硅化白云岩→青灰色白云岩,依次出现刺穿体岩相带和构造蚀变岩相带,即火山角砾岩相带→含火山岩、板岩角砾岩相带→强铜矿化灰白色硅化白云质碎裂岩相带→铜矿化碎裂白云岩相带→弱硅化白云岩相带。其中强铜矿化硅化白云质碎裂岩相带、铜矿化硅化碎裂白云岩相带是矿体的主要赋存部位。金属硫化物矿物组合与矿石构造亦呈现水平分带规律：黄铜矿+斑铜矿(少)组合,块状、网脉状构造→黄铜矿+斑铜矿+辉铜矿(少)组合,稠密浸染状、脉状构造→黄铜矿+黄铁矿+斑铜矿(少)组合,细脉状、稀疏浸染状、星点状构造。     

安徽铜陵冬瓜山大型铜矿:海底喷流-沉积与矽卡岩化叠加复合成矿过程

冬瓜山铜矿是长江中下游成矿带铜陵矿集区内的一个大型铜矿。该矿床被惯称为矽卡岩型矿床,但具明显的层控特征。主矿体呈层状、似层状,赋存于上石炭统碳酸盐建造与下伏上泥盆统砂岩建造的接触带附近,主要由一系列层控块状含铜硫化物透镜体、含铜矽卡岩透镜体、磁铁矿矿囊以及层状含铜黄铁矿-蛇纹石矿席组成。主矿体的底部为根植于上泥盆统砂岩建造内的层控脉状-网脉状矿,下部为层状含铜黄铁矿+蛇纹石矿席,主体为块状含铜硫化物透镜体与上覆硬石膏层构成的三个硫化物-硫酸盐韵律单元。该双层结构特征总体类似于VMS和SEDEX型矿床,但矿石结构构造表明,这些硫化物-硫酸盐沉积均不同程度地遭受了后期热液-变质作用叠加改造。层控含铜矽卡岩通常发育于块状含铜硫化物透镜体之上,小型磁铁矿矿体或矿囊通常围绕陡倾的闪长岩株零星分布。这两类矿化均与燕山期岩浆活动(约137Ma)和石英二长闪长岩株侵位密切相关。矿区可见两种蚀变作用:石英-绢云母蚀变与矽卡岩蚀变。前者在下盘砂岩中形成似整合蚀变带,包裹层控网脉状矿,其成因可解释为晚石炭世热液流体在海底之下砂岩透水层内发生侧向迁移、弥散排泄及金属卸载;后者由燕山期石英二长闪长岩侵位引起,形成两类矽卡岩,其中,镁质...     

别子型火山成因块状硫化物矿床的地质和地球化学特征

别子型矿床最早形成于古元古代,并在显生宙海沟环境或弧前盆地广泛发育,其成矿区域发育厚层沉积岩地层,覆盖在火山岩之上,对成矿流体物质交换和金属元素富集有重要意义。别子型块状硫化物矿床下盘发育强烈的黄铁绢英岩化,而上盘仅发育微弱的绿泥石化、碳酸盐化。矿床常呈单个矿体产出或2~3个矿体连生,剖面上,由下至上表现为枕状玄武岩→块状含铜黄铁矿矿石→块状、条带状燧石黄铁矿矿石→块状碧玉岩。别子型矿床的火山岩围岩多为钙碱性系列,少量拉斑系列,与活动大陆边缘的岛弧火山岩具有相似的微量和稀土元素地球化学特征。成矿流体中的硫为幔源硫和海水硫的混合来源,成矿元素来源为幔-壳混合源。     

云南峨山县波司甸铜矿地质特征及找矿前景

波司甸铜矿的矿体赋存于中元古界昆阳群落雪组(Pt_2l)硅质白云岩、砂质白云岩中,矿体呈似层状、透镜状顺层产出。矿床主要受地层、岩性控制,属沉积-变质型矿床。矿区内铜土壤地球化学异常明显,含矿层位落雪组(Pt_2l)分布广泛,并且已发现了一定规模的铜矿化体,显示了较好的找矿远景。     

甘肃省肃南裕固族自治县摆浪沟矿化区找矿潜力分析

摆浪沟地区地处北祁连山西段奥陶纪弧后盆地火山岩带内,区内古火山机构保留完整,火山岩系为蛇绿岩套上部火山岩的组成部分,岩相发育齐全,与铜矿化密切相关的热水沉积岩——红碧玉岩发育,沿火山机构铜矿化发育普遍,既有与构造破碎带有关的铜矿化,也有与喷流岩有关的火山块状硫化物矿化存在,显示了该区寻找富铜块状硫化物矿床的巨大前景。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

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.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of