辽东南金矿床成矿模式及找矿信息

在辽东南地区工作研究成果基础上,重点解剖了已开采和勘查的金矿床,总结出金矿成矿规律,阐明中生代印支-燕山期为主要金矿成矿期,划分了6个金矿化区,综合辽东古裂谷的演化过程建立了裂谷产生→矿源层及容矿围岩形成→裂谷消亡及某些矿床雏形的形成→裂谷活化进入主成矿期的矿床成矿模式,指出了找矿信息.     

辽东地区金矿成矿规律初步研究

论述了辽东地区金矿成因类型、金矿化集中区及成矿地质条件，揭示了金矿成矿规律，并指出在辽东隆起区内太古宇和元古宇变质地层、深断裂或大断裂带、印支期和燕山期花岗质类岩石三者共存（三体一位）于一个地区，是形成金矿化集中区的必要条件。     

论福建省闽中裂谷带成矿系统

闽中裂谷带有一套与裂谷构造演化密切相关的矿床组合。裂谷演化的各阶段都伴随着特定的成矿作用,形成了相庆的矿床类型裂谷张开和大洋形成阶段形成层控型块状硫化物矿床;裂谷事碰撞阶段形成韧性剪切带型金矿;后裂谷阶段形成岩浆热液矿床。各类（式）矿床的常是构造化各阶段伴随的多种成矿作用叠加和改造的产物,表现为成矿的多阶段和物质的多来源。因此将裂谷构造环境及其化各阶段成矿作用和种类矿床作为一个整体,称之谓闽中裂谷     

辽东古元古代镁质非金属矿床成矿系统研究

辽东地区古元古代裂谷里尔峪组和大石桥组中分别分布有富镁质的碳酸盐岩建造, 其中产有硼矿、菱镁矿、滑石、岫岩玉等大型-特大型矿床.这些镁质非金属矿床的形成先与古元古代的蒸发岩系有关, 然后经历了吕梁期区域变质和热液交代变质改造, 以及印支、燕山期构造-岩浆作用改造等成矿系统作用过程.其中, 镁质碳酸盐岩建造、成矿构造、成矿流体对镁质非金属矿床的形成起着重要的控制作用.这些矿床也是古元古代矿源场、流体场、热场(能量场)、应力场等在一定的时空条件下耦合和后期构造-岩浆作用叠加改造的综合产物.      

辽东早元古代裂谷多金属硫铁矿地质及其成矿规律

辽东早元古代地层内赋存着一系列多金属硫铁矿床。矿床的形成与分布主要受裂谷盆地演化及含矿建造控制。在不同的演化阶段分别形成了含钴黄铁矿 含铜黄铁矿 含硬石膏黄铁矿矿床系列和含硼（镁电气石）磁黄铁矿 含铅锌黄铁矿 重晶石闪锌黄铁矿矿床系列。依据成矿特征可分为海底火山喷气沉积与海底喷气沉积两种成因类型。成矿作用受裂谷、次级盆地、一定含矿层位和特殊容矿岩石相互联系与配套的控矿因素制约。在对成矿规律研究的基础上将该区多金属硫铁矿划分为６个成矿远景区。     

辽东地区金矿床类型、成矿特征及找矿潜力

辽东地区是我国重要的金矿集区之一,中生代构造、岩浆活动强烈,并伴生强烈的金成矿作用。根据金矿床时空分布及成矿特征,将辽东地区划分为三个金矿集区:青城子、五龙、猫岭。矿集区内金矿包括石英脉型金矿和蚀变岩型金矿这两种类型,并分别受高角度断裂和低角度断裂构造体系控制。辽东地区金矿成矿时代主要为早白垩世,少量早侏罗世。已有H-O同位素、成矿流体及地质研究表明:(1)区内金成矿与中生代岩浆活动有关、受断裂构造控制,并以强烈硅化-绢云母化为特征标志;(2)区内金矿床属于岩浆热液型矿床;(3)充填作用和混合作用可能是辽东地区金矿床成矿物质沉淀的机制。辽东地区金矿成矿系统按其产出环境及特点,可分为两个亚系统:产于中生代花岗质岩体内岩浆热液金成矿系统(五龙式)及产于古元古代变质岩中岩浆热液金成矿系统(青城子式、猫岭式)。结合区域找矿进展和近期研究工作,建立了辽东地区金矿找矿预测地质模型,认为本区具有与胶东地区相似的金矿成矿条件,成矿潜力巨大,研究工作对区域矿产勘查部署工作有指导意义。     

辽东-吉南Fe- 菱镁矿 Cu-Au成矿带主要地质成矿特征及潜力分析

辽东-吉南成矿带是2008年确定的首批16个重要成矿带之一,随着新的找矿进展和预测成果不断涌现,需要对其开展新一轮研究总结。本文以新的研究成果和找矿突破为基础,通过综合分析,将其命名为"辽东-吉南Fe-菱镁矿-Cu-Au成矿带"并对其开展成矿作用类型及勘查部署综合研究。该区带范围与III级成矿带辽东(隆起)Fe-Cu-Pb-Zn-Au-U-硼-菱镁矿-滑石-石墨-金刚石成矿带一致,结合区域成矿地质背景、成矿作用类型及典型矿床的综合研究,初步建立了辽东-吉南Fe-菱镁矿-Cu-Au成矿带成矿谱系,并将其主要成矿期归纳为三期:新太古代、古元古代和中生代燕山期;在典型矿床成矿地质特征及潜力评价综合分析的基础上,总结了研究区主要成矿类型为沉积变质型铁-菱镁矿、火山沉积-变质改造型铜锌矿、沉积变质-叠加改造型铅锌矿、岩浆型铜镍硫化物矿、岩浆热液型金矿以及造山带型金矿。结合区域找矿进展和潜力评价最新成果,认为本区Fe、菱镁矿、Cu、Au潜力巨大,为下一步勘查部署的主攻矿种,同时在本区划分了12个远景区,其中10个为重点远景区,2个为远景调查区,对研究区下一步矿产勘查部署工作有一定指导意义。     

辽东地区硼矿床区域成矿系统分析

辽东硼矿体受层位控制,呈层状、似层状产出,其形成既与原始火山一沉积作用有关,又遭受多期次变质变形及热液的叠加改造,以及印支、燕山期构造一岩浆作用改造等作用过程,矿床为“火山（热水）沉积一变质热液叠加改造”的多期多成因层控矿床。认为多期多阶段变质热液形成与矿集区具有不同成矿有利性质的岩石之间发生的交代作用所引起的各种成矿...     

辽东裂谷白云金矿载金黄铁矿Re-Os定年及其地质意义

白云金矿是辽东裂谷区内重要的大型金矿之一,长期以来缺少直接的年代学数据。本次对白云金矿不同矿石类型中的8件载金黄铁矿进行了Re-Os同位素定年,获得其等时线年龄为225.3±7.0 Ma(MSWD=5.8),187Os/188Os初始值为2.1±2.8。结合前人的研究成果及本次年代学研究得出:白云金矿形成于印支期,其成矿物质主要为壳源,白云金矿是与印支期岩浆活动有关的热液矿床;其形成构造背景可能为受蒙古–鄂霍次克大洋向南北两侧俯冲之后的陆内后碰撞造山环境。本次研究也为今后在辽东裂谷区寻找与印支期岩浆活动有关的矿床提供了依据。     

胶东中生代两期金矿化作用的对比研究及其意义

中生代，胶东地区存在燕山期和燕山晚期两期金矿化作用。燕山期金矿化与陆内碰撞（俯冲）的挤压地球动力学环境有关，形成中深石英脉型和蚀变岩型金矿床，以玲珑型和焦家型金矿床为代表，与区域花岗岩浆活动存在时间、空间和成因上的紧密联系。燕山晚期金－多金属矿化与陆内拉张火山裂谷带地球动力学环境有关，形成浅成蚀变岩型（或脉型）金－多金属矿床，以蓬家夼金矿床为代表，与青山期火山－岩浆活动有关。本就两期金矿化的成矿地球动力学环境、矿床地质特征、矿床稳定同位素特征等进行了详细的研究，指出燕山晚期金－多金属矿化作用是胶东地区与燕山期金矿化作用同等重要的成矿阶段。加强燕山晚期金－多金属成矿作用的研究，对于扩大胶东金矿床的找矿远景，保持胶东黄金产业的可持续发展具有十分重要的意义。     

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