新疆哈巴河县某金矿地质环境影响程度评价

新疆哈巴河县某一金矿为多年开采的老矿山,矿山采用地下开采方式,针对该金矿前期开采现状地质环境影响程度和后期开采预测地质环境影响程度问题,选取地质灾害危害程度、含水层破坏程度、对地形地貌景观破坏和土地资源破坏四个指标进行分析,分析各矿建设施、破坏土地单元和采矿活动对地质环境的影响程度,最后根据地质环境的破坏程度提出了相应的矿山地质环境防治措施。     

广西某石灰岩矿山地质环境影响评估与防治工程

以广西某石灰岩矿山为例,着重介绍矿山地质环境影响评估的基本思路、分析方法及防治对策.在了解矿山基本情况和查清矿山地质环境问题的基础上,结合采矿工程场地地形及工程活动特点,从地质灾害、含水层、地形地貌景观和土地资源4个方面,对矿山配套工程逐项进行了矿山地质环境影响现状评估和预测评估.根据评估结果,将评估区划分为重点、次重点和一般3个防治区,并提出了相应的恢复治理措施.     

安徽含山县清溪镇应村建筑石料用白云岩矿矿山地质环境影响和土地损毁研究

本文通过对含山县清溪镇应村建筑石料用白云岩矿矿山地质环境影响评估、矿山土地损毁预测与评估、矿山地质环境治理分区与治理等方面进行评价,提出了矿山地质环境保护与治理建议.得出结果:矿山已损毁土地面积9.06hm2,最终损毁土地面积11.35hm2.划分出:露天采场挖损损毁土地破坏地形地貌景观重点防治区(Ⅰ)、工业场地压占损毁土地破坏地形地貌次重点防治区(Ⅱ)和矿山外围地质环境影响一般防治区(Ⅲ).     

合肥市矿山地质环境现状及发展趋势

本文阐述了合肥地区的矿产资源开发利用现状,从矿山地质灾害、占用破坏土地资源、地形地貌景观与破坏植被资源、矿山废水、废渣对水土环境影响等四个方面分析评价了合肥市矿山地质环境现状,并预测了矿山地质环境变化趋势分析。     

地球化学元素空间定量组合求异模型及其应用

由于成矿过程的多期性与多源性,成矿区地球化学元素在空间上表现出共生组合特征。为刻画组合特征的类型与特点,提出一种地球化学元素空间定量组合求异方法,构建了因子泛克里格模型、多元序列典型趋势面模型及特征分析组合模型。将上述3种空间定量组合求异模型应用于云南哀牢山墨江地区1∶20万化探数据进行处理分析,目的在于从多元角度刻画元素异常,提高矿异常预测精度。计算结果表明:该区存在4种异常类型,反映了不同地质条件下元素共生组合及其在成岩成矿过程中的内在组配机制和空间关系。由此得出结论:在成矿预测过程中应按不同的定量组合异常类型及其相应地质背景进行预测。     

模糊聚类分析及其在娄里金矿化区的应用

模糊数学已经引起了地质工作者的注意,并开始应用模糊数学解决地质找矿问题.成矿预测、远景区的划分、物化探异常分类和评价、矿床成因以及地球化学元素间的亲疏关系等等,都是带有一定模糊性的问题,都可以应用模糊数学去研究. 本文主要介绍模糊聚类分析的基本原理,举     

我国农业地质调查战略布局

<正> 国土资源部网消息,我国农业地质调查完成战略部署,调查范围和时间表敲定,部署的原则是覆盖中部农业生产区,重点安排东部经济区,优选西部农牧区。调查将对中国主要农业区的地质生态环境进行评价,摸清土地质量,查明土壤中化学元素的含量和分布特征;进行土壤地质环境预测、预报和预警,建立全国重点地区农业地质环境监测体系。     

地下水污染环境影响模拟与预测

地下水污染具有过程缓慢、不易发现和难以治理等特点,属重大环境问题。为进一步了解地下水污染的环境影响,以某污水处理厂为例,结合所在场区的地质特征,采用注水试验确定场地内土层的渗透系数;建立数学模型对环境影响进行模拟,并利用已知的各项水文地质参数,对正常工况排水条件下污染物的环境影响范围进行预测,为地下水污染的防治实践提供技术支持。     

贵州矿山地质环境影响评估

在探讨矿山地质环境影响评估发展趋势的基础上,结合贵州矿山地质环境特点,选取多变量综合指数评价法对贵州省矿山地质环境进行影响评估,在合理选定全省矿山地质环境影响变量权重、赋值标准以及单元格划分方法的,得出全省矿山地质环境影响综合指数及评估分区。分区充分反应了贵州矿山地质环境的特点,为今后开展全省矿山地质环境保护与恢复治理提供了技术支撑。     

垃圾渗滤液在土层中迁移转化规律实验研究

本文利用室内模拟实验对垃圾渗滤液在垃圾填埋场周边地区土层中的迁移转化规律进行研究,分析了渗滤液与介质作用机理,进一步计算了污染质在土层中阻滞因子和水化学迁移率,为评价和预测垃圾填埋场对地质环境影响效应提供理论依据和计算参数。     

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