普朗铜矿的找矿标志与成矿规律探讨

普朗铜矿矿体形态简单,以铜为主,伴生金、硫等多种有益组份.矿体的形成受地层、构造、岩浆岩及物化条件等综合控制.通过对地质、矿床特征、控矿因素的分析研究,总结出了在该区找矿的构造、蚀变、矿物标志等重要找矿标志,探讨普朗铜矿的成矿规律.     

香格里拉地区勘查地球化学信息找矿应用

香格里拉普朗特大型半隐伏斑岩铜矿的发现,充分体现了勘查地球化学信息的先导作用。通过分析矿区成矿地质背景,从典型矿床地球化学找矿标志研究入手,探讨了不同精度Cu元素和Cu、W、Mo累加指数异常对斑岩铜矿找矿的指导意义。     

普朗矿区大比例尺构造-岩性填图与找矿预测应用

<正>普朗铜矿床位于西南三江地区格咱弧东斑(玢)带,与印支期普朗复式中酸性斑(玢)岩体有关,是该区发现的最大规模的铜矿床。对于斑岩型铜矿床来说,其成矿地质体主要为侵入岩体,是形成矿体(床)成矿地质作用的实物载体,成矿作用主要集中于岩浆房高位突出的小岩体顶部及其内外接触带范围内,在预测工作中,利用其和矿床(体)的确定性关系就可以明确找矿方向。特别对于普朗超大型铜多金属矿床来说,如此规模的金属是如何聚集并沉淀的,什么样的成矿地质体可以带来这么多的金属元素,还或者是     

基于MRAS的证据权重法在香格里拉地区的综合信息成矿预测

在成矿地质背景分析和以普朗斑岩型铜矿为主的典型矿床研究基础上,通过对香格里拉地区已知矿床点与区域地质、重力、航磁、水系沉积物、重砂和遥感等数据资料再次处理及与解译成果的空间关联分析,确定斑岩型铜多金属矿的找矿标志,以此为依据提取和构置各类地学综合成矿信息预测变量。基于MRAS证据权重法,以2 km×2 km网格单元计算得到的后验概率,最大值与最小值4级优选分级评价了研究区斑岩型铜多金属矿的A、B、C 3个级别的找矿预测远景区。结果显示,普朗特大型斑岩型铜矿,红山夕卡岩-斑岩型铜矿,目前已取得重要找矿进展的松诺、欠虽、亚杂等铜多金属矿床点和具有较大找矿潜力的拉巴铜矿点均落在A级远景区。这表明综合信息成矿预测图直观表达了香格里拉地区斑岩型铜多金属矿成矿系列总体找矿潜力。     

基于成矿系统的三维定量预测研究——以四川拉拉铜矿为例

随着矿产资源预测的发展,三维矿产资源定量预测评价已经成为矿产勘查领域的热点。然而真正决定矿产预测及矿产勘查成败的核心在于:如何构建恰当的预测变量来反映成矿作用过程。本文以四川拉拉铜矿为例,通过成矿系统分析“源-运-储-保”四大要素总结了该区矿产预测的地质找矿要素。基于三维地质建模技术以及成矿信息定量提取技术,构建了区域找矿要素三维地质信息。以找矿信息量为数学模型,确定了拉拉铜矿成矿有利区划,圈定了4个找矿靶区。本次研究将矿床成矿系统分析(知识驱动)与三维定量分析(数据驱动)相结合,将成矿作用过程及关键因素(源、运、储、保等)转化为可预测的具体空间要素,并使用三维可视化技术进行三维空间重构,该方法为今后的三维定量预测工作提供了有利参考。     

云南中甸普朗、红卓斑岩铜矿床地质特征及找矿前景

通过对印支期普朗、红卓岛弧型斑岩铜矿矿床地质特征和找矿标志的总结,论述了铜矿的找矿前景以及工作方向。     

云南中旬普朗、红卓斑岩铜矿床地质特征及找矿前景

通过对印支期普朗、红卓岛弧型斑岩铜矿矿床地质特征和找矿标志的总结，论述了铜矿的找矿前景以及工作方向。     

云南香格里拉县普朗铜矿北矿段特征及找矿前景

普朗铜矿北矿段(52-76线)仍属斑岩型铜矿,成矿岩体主要为印支期中酸性侵入岩,属铝饱和高钾钙碱性系列。斑岩铜矿的成矿年龄主要集中在213-216Ma。该矿段与成矿有关的斑岩体规模较大,蚀变矿化范围广,具有较大的找矿空间。     

内蒙古铜矿找矿方向探讨

内蒙古具有有利的铜矿成矿地质条件,但与目前已发现的铜矿资源量不相适应。本文通过分析,说明内蒙古境内地质构造演化过程中,在不同地质历史阶段皆具有铜矿成矿有利的地质构造环境及岩浆活动,表明其具备了寻找铜矿床的最有利的前提条件,找矿潜力很大,并指出了铜矿找矿方向。     

滇西羊拉铜矿三维成矿预测及靶区优选

近年来,羊拉铜矿已探明矿产资源储量严重消耗,矿业形势严峻。为进一步探明矿区深、边部找矿有利部位,以地质勘查成果为依据,结合区域成矿背景,深入分析矿床地质特征、围岩蚀变及侵入体等,基于GIS、Geomodeller软件平台构建矿床三维数据库和地表、地层、岩体、断层和已知矿体的三维地质模型,从三维角度揭示地层单元、地质构造、蚀变信息、侵入体及地质复杂度与成矿的关联度,得出构造、岩浆岩为关键证据因子,构建了基于证据权法的找矿预测模型,圈定2处成矿有利靶区。预测结果显示,预测远景区与含矿岩体、深部侵入体及构造交汇部位具有较好的空间一致性,表明预测结果准确、可靠,矿区西部、东北部是矿区下一步找矿工作的重要区域。     

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.     

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     

ENGINEERING GEOLOGY

正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)