北山地区小狐狸山一带新发现中型萤石矿床

<正>1研究目的（Objective）研究区地处塔里木板块北部边缘,位于觉罗塔格—黑鹰山铜、镍、铁、金、银、钼、钨、萤石、煤成矿带。区内岩浆活动强烈,断裂、褶皱发育,为铁、铅锌、钼、萤石等各类矿产提供了有利的成矿地质条件。该区自小狐狸山铁矿发现以来,针对铁、     

浙江湖州地区成矿条件及找矿前景分析

浙江湖州地区位于长江中下游铜、金、铁、铅、锌、硫成矿带东段之缘，本文通过对湖州地区萤石、金、银、铅、锌、铁、硅灰石、地热等主要矿产地质特征及分布规律的分析，认为本地区萤石、金、银、铅、锌、铁、硅灰石、地热等主要矿产受地层、构造、岩浆岩联合控制。总结了各主要矿产成矿规律，提出了四大成矿远景区，并指出了各远景区的目标矿种，对进一步的找矿工作有一定的指导作用。     

额尔古纳地区有色,贵金属成矿特征

额尔古纳地区是一个重要的有色,贵金属成矿省,区内金,银,铅,锌,铜等矿产具明显分带性,可划分为耳布尔,上护林及恩和３个成矿小区,分别以银铅锌,铜多金属,金为主,该区在Ｊ３－Ｋ１时期发生了强烈的构造一岩浆活动这些矿产在成因上均与Ｊ３－Ｋ１时期酸性岩浆侵入作用密切相关,成矿热液主要来源于岩浆热液。     

基于GIS的北祁连铜钨金资源评价系统

在北祁连铜钨金成矿区,已积累了大量的地质、物化探、遥感、矿产资料,利用GIS不仅可以管理以文字、数字为主的属性信息,而且可以管理以图形图像为主的空间信息,且能方便快速进行数据采集、存储、更新、查询检索、分析建模、显示输出等功能.建立北祁连铜钨金资源评价系统,对北祁连地学信息资料进行分析综合,建立北祁连铜钨金矿的空间分析模型并进行成矿预测,圈定铜钨金矿矿集区,将有助于进一步查明该区铜钨金等矿产的找矿潜力.     

河南卢氏—栾川地区铅锌银矿矿床成因及找矿模式

卢氏-栾川地区位于东秦岭多金属成矿带东段,矿产资源丰富,为我国重要钼、钨、金、银、铅、锌、铜、铁、硫等矿产地,矿产勘查及研究程度较高。以往矿产勘查工作侧重于钼、钨、金、银、铜、铁、硫,认为铅锌矿成矿条件差。通过系统收集和研究区内已有资料,按照成矿系列理论和矿床分带分布模式,结合卢氏-栾川地区铅、锌、银矿调查评价的工作实际,认为该区铅、锌、银矿成因可以概括为"同生沉积—后期改造成矿模式"。     

滇东南薄竹山地区成矿地质条件分析

<正>滇东南地区为云南省重要的钨、锡、银、铜、铅、锌等矿产基地.自西向东分布着个旧岩体、薄竹山岩体和老君山岩体。薄竹山岩体形成于晚白垩世,分布面积约120km2,其边缘地带是寻找大、中型钨锡多金属矿床的有利靶区;经过近几年地质勘查工作,在其周边发现一些小-中型的矽卡岩矿体,以铁、铜、锡、钨为主,伴生铅、锌、银等。矿体分布明显受区内特定的地层、岩体、构造等成矿条件制约。本文试图通过对该区地质特征、物化探信息特征进行综合和分析,评价区内的找矿潜力。     

再创找矿佳绩,为我省经济建设立新功——对我省找矿突破的几点看法

分析了福建省铁、铜、铅锌、钼、金、银、锡、非金属、能源等矿产的成矿地质条件、资源背景、找矿潜力、重点成矿区带、部分含矿层、岩浆-构造-成矿作用等,对我省地质找矿突破的方向提出了看法和建议。     

额尔古纳地区有色、贵金属成矿特征

额尔古纳地区是一个重要的有色、贵金属成矿省.区内金、银、铅、锌、铜等矿产具明显分带性,可划分为耳布尔、上护林及恩和3个成矿小区,分别以银铅锌、铜多金属、金为主.该区在J₃-K₁时期发生了强烈的构造-岩浆活动,这些矿产在成因上均与J₃-K₁时期酸性岩浆侵入作用密切相关,成矿热液主要来源于岩浆热液.矿体主要受次级张性裂隙控制,以NW向为主.成矿时代主要为J₃-K₁.     

四川省冶金地质勘查局六零六队

四川省冶金地质勘查局606大队（以下简称我队）创建于1971年,是一个集地质找矿、工程勘察、测试为一体的专业地质勘查队伍。先后在云、贵、川、藏等省区承担过国家和地方各级政府的金、银、铜、铅、锌、铁等金属矿产和石灰石、     

云南省维西县大宝山铜(银)矿床地质-矿化特征及其综合找金潜力

云南维西大宝山铜(银)多金属矿区通过近年的地质勘查,探明的铜资源量已达中型规模。在以铜、银为主的找矿过程中,发现矿体中有金矿化显示,经进一步调查证实,本区铜(银)矿体中金矿化普遍,且有一定强度。结合区域成矿地质背景及矿区的金矿勘查成果,研究认为,该区金矿找矿潜力较大,今后应重视金矿的综合勘查。     

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