刚果（金）卢杰巴铜矿成矿规律及找矿远景评价

研究区域位于世界最大的铜矿成矿带之一的赞比亚—刚果(金)铜矿带上。通过研究已知铜矿体的地质特征,论述了矿区地层、构造与矿体的关系,认为铜矿体是经多次构造作用、热液叠加改造及变质改造作用的影响而形成的层控型铜矿床。通过综合研究地质成果,总结了成矿规律,分析了找矿标志,同时评价了该区良好的找矿远景,对于区域上寻找同类型铜矿床具有指导意义。     

中国铜矿床成矿系列研究进展

矿床成矿系列理论在中国经过三十多年的发展,已被广泛应用于找矿勘查实践。文章在以往矿床成矿系列研究的基础上,对中国铜矿床的成矿系列进行了补充与完善,厘定出30个以铜为特色的矿床成矿系列。结合全国地质与成矿演化,分析铜矿床成矿系列在主要地质历史时期的特点与时空分布规律,其中,前寒武纪7个铜矿床成矿系列,矿床类型以变质型和岩浆型为主;古生代8个铜矿床成矿系列,矿床类型以海相火山岩型为主;中生代13个铜矿床成矿系列和新生代2个铜矿床成矿系列,矿床类型均以斑岩型和矽卡岩型为主。西藏地区铜矿找矿突破显著,新增2个全国范围的铜矿床成矿系列。矿床成矿系列的复合,是中国铜矿床成矿系列研究的重要成果和特色。     

河北北岔沟门铅锌矿地质地球化学特征及找矿模式

通过研究北岔沟门矿床所处背景场、区域场、矿区、矿带(床)等地质、地球化学特征,总结了该区成矿地质条件及成矿规律,重点研究了北岔沟门矿床成因,建立了北岔沟门银铅锌铜矿浅成侵入岩-热液体系成矿模式;构建了该类矿床的地质地球化学找矿模型,总结出找矿勘查的地质、化探最佳方法组合.通过综合研究得到以下几点认识:     

洞沟铜矿成矿地质特征及进一步找矿方向探讨

通过对矿区成矿地质条件分析,认为洞沟铜矿成矿主要与变基性侵入岩和燕山期花岗岩侵入有关,矿体产于变基性火山层间破碎带中,矿床成因类型为中低温热液型。提出了进一步找矿方向,为燕山期花岗岩分布区和变基性岩破碎带。     

东昆仑大卧龙地区铅锌多金属矿地质特征及找矿前景分析

大卧龙地区位于夏日哈-什多龙铁-铅-锌-银-锡-钼-硅灰石-白云岩成矿亚带,是青海省铁多金属矿的主要成矿带之一。前人在矿床成因、控矿因素和找矿标志等方面研究较薄弱,如何在新一轮找矿中突破已成为目前矿床研究的关键问题。笔者在讨论成矿地质构造背景基础上,结合以往地质勘查成果资料,对矿(床)点地质特征进行了研究,分析成矿规律和控矿地质因素及矿区的找矿前景,认为在矿区热液型矿产找矿条件有利,受构造控制的(岩浆)热液型矿床为今后的找矿重点。     

秦岭造山带柞水 山阳沉积盆地铜矿勘查思路与方法

秦岭造山带中柞-山盆地铜矿点众多,主要铜矿类型为斑岩型、热水喷流-改造型,结合近期勘查成果和综合研究进展,认为这些矿点可能同属于岩浆-热液-沉积成矿系列.本文在总结区内铜矿床地质特点的基础上,以区内主要铜矿勘查实例为依据,综合地、物、化找矿信息,提出有效的找矿方法为高精度磁法扫面、大地测深定位,地质钻探验证,为区内寻找铜矿提供了新的勘查思路与方法.     

浙江省铜矿床（化）的时空分布特点与找矿方向

本通过总结全省已知铜矿床（化）时间、空间分布的特点,结合我省区域地质构造的演化,研究了西式（细碧角斑岩型）、岭后式（热液〈似层状〉交代型）、斑岩型及紫金山式（斑岩－浅成热液型）等几种主要铜矿床类型的成矿地质与地球化学条件及找矿方方,圈定了成矿远景区和找矿靶区。     

论小坝梁铜矿床的海底火山热液成因

本文对内蒙古小坝梁铜矿床的成矿地质构造背景、成矿地质特征、同位素及矿床地球化学作了一系列研究，并与国外同类矿床进行对比，确定该矿床属海底火山热液型，成矿时代为晚华力西期。此项研究为该类矿床的勘查拓宽了思路，指出小坝梁矿区北部与东部为勘探铜矿床的远景区。     

陕西省凤县九子沟铜矿矿床地质特征及成因研究

本文通过对九子沟铜矿床成矿地质背景,矿区地质特征,矿体特征,矿石特征,流体包裹体特征,硫同位素特征等几个方面的综合研究,九子沟铜矿床矿体主要赋存于星红铺组地层中的九子沟-太山庙灰岩单斜层北接触面及其附近,以层状、似层状产出。九子沟铜矿床分为三个成矿期:早期沉积-变质期、中期热液改造期和晚期表生期,中期热液改造期为主要成矿期。流体包裹体特征显示成矿温度主要集中于180~240℃,盐度集中于2.0%~6.0%NaCl,密度为0.68%~0.95%,成矿深度为0.9~3.2km,成矿流体属于低盐度低密度体系。九子沟铜矿δ18OH2O平均为-4.098‰;δDH2O平均为-80.625‰,说明成矿流体主要为大气降水或地下热卤水。δ34S值变化范围为6.21‰~9.37‰,平均7.44‰,说明硫主要来源于地壳,且有少量海水硫酸盐中硫的加入。认为该区矿床属沉积-热液叠加改造型铜矿床。     

中蒙俄跨境区域铜、金、铅、锌、铀成矿特征对比及意义

本次研究的中蒙俄跨境区在大地构造位置上位于中亚造山带东部,是多种矿产的成矿密集区。本区成矿区带包括2个Ⅰ级成矿域、2个Ⅱ级成矿省和9个Ⅲ级成矿带。区内金属矿床的分布主要受北东-北北东向及北西向两组断裂的控制。研究区重点金属矿产中,铜矿床以斑岩型为主;金矿床以岩浆热液型为主,也有部分作为伴生矿种产于斑岩型铜(金)矿床之中;铅、锌矿床以热液脉型为主;铀矿床以火山岩型为主。铜、金、铅、锌、铀成矿作用与燕山期岩浆及其热液活动关系最为密切。本研究区具有良好的成矿地质条件和巨大的找矿前景,是进一步开展铜、金、铅、锌、铀等金属矿产找矿工作的重点地区。     

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.     

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.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

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).     

HYDROGEOLOGY

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     

METAMORPHIC PETROLOGY

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),     

SERIALS

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GEOPHYSICAL EXPLORATION

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-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

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-     

PETROLEUM GEOLOGY

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.)     

GEOCHEMISTRY

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