内蒙后二道沟铜金矿床综合信息找矿模型及矿床成因探讨

在系统研究内蒙后二道沟铜金矿床地质特征、矿体地质特征、地球物理特征及地球化学特征的基础上,将地质、物探及化探等数据进行系统关联,探讨各类信息之间的相关关系,从而构建了以"有利成矿地质条件+Au、Cu、Pb、Zn、As等指示元素的综合异常+低阻、高极化、高磁"为标志的综合信息找矿模型,综合异常区域可能是矿(化)体的赋存位置,其激电测深低视电阻率300Ω·m、高极化率3.0%、高磁异常300 nT。初步分析成矿构造背景及成矿三要素(热能、成矿流体、成矿物质)来源,并建立了矿床成因模式,认为矿床类型有矽卡岩型铜金铅锌多金属矿床、构造破碎带型铜金多金属矿床和石英脉型金矿床。     

综合物探方法在多不杂斑岩型铜金矿床的应用

通过在西藏多不杂斑岩型铜金矿床0号勘探剖面开展高精度磁测、激电中梯剖面、激电测深、音频大地电磁测深(AMT)等多种物探方法,了解多不杂斑岩铜金矿体引起的磁、电变化特征,证明该方法组合在多不杂斑岩型铜金矿区找矿的有效性,为多龙矿集区下一步的找矿工作选择了合适的物探方法组合。首先利用高精度磁测圈定斑岩体的范围,同时利用激电中梯扫面准确定位硫化物富集区域,结合地质、化探等资料在成矿有利地段利用激电测深来识别异常的空间展布形态,最后利用音频大地电磁测深获得剖面深部电性结构特征,综合多种手段判断是否为矿致异常,降低了地质找矿的风险。     

安徽庐江黄屯铜金矿床原生晕特征及矿床成因

通过对安徽庐江黄屯铜金矿床18号勘探线上的4个钻孔岩心进行系统取样和分析,研究了18号勘探线剖面地质特征及原生晕分带特征,探讨了该矿床的地球化学异常模式及矿床成因。黄屯铜金矿床的特征元素组合为Au、Ag、Cu、As、Sb、Bi、W,原生晕垂向分带序列为（Sb、As）-（Ag、Au、Cu）-（Bi、W）。18号勘探线剖面地质特征和原生晕形态特征显示,在ZK18-1钻孔和ZK18-2钻孔之间可能存在隐伏断层,造成铜金矿体和地层错动。在TK02钻孔底部发育热液矿床前缘晕元素组合异常,指示深部可能存在隐伏矿体。综合研究认为,黄屯铜金矿床的成矿物质可能主要来源于火山热液和闪长玢岩,该矿床为火山-次火山热液型矿床。     

山东焦家金矿床深部成矿预测与找矿效果对比

焦家金矿床是著名的构造破碎蚀变岩型金矿床，通过物化探研究，对深部成矿远景进行预测并布置了钻探工程，大致查明了矿床深部破碎蚀变带地质特征及含矿性；基本探明了矿体的规模，形态，产状及赋存部位，矿石的类型和结构构造等特征，并合理地圈定了矿体，以深部原生晕建立了深部化探异常模式，指出了深部矿体矿头和近矿指示元素组合特点，从而为深部是否继续开展普查提供了依据。通过钻探工程验证，矿体及构造带的位置与物探结果比较吻合，说明本区物探方法寻找隐伏矿体有较好的效果。     

寻找隐伏金属矿产的方法系统

寻找隐伏的有色、稀有及贵金属矿床有三个方法系统，即以观测矿体引起的物探异常为目的的物探方法系统，以观测矿体或矿床上部地球显目的化探方法主以研究解决找矿过程中的地质问题为目的综合方法系统。     

论易门铜矿区叠加钴矿化地质特征

综合研究易门铜矿区钴、铜一钴矿床的矿化围岩及蚀变、矿石与脉石矿物组合、矿体地质特征等，提出易门铜矿区的钴矿化形成于晋宁期或印支－燕山期与隐伏的中－酸性岩体有关的后生叠加岩浆期后热液作用，还指出找矿方向，注意在隆起（背斜）与断裂构造的发育区，硅化、钠化、黑云母－绿泥石化蚀变带及Ｃｕ、Ｃｏ（Ａｕ）、Ａｓ、Ｐｂ、Ｚｎ化探异常的地段，优先找矿评价，扩大钴、铜－钴矿床的远景。     

地、物、化综合方法在博故图金矿勘查中的应用

低密度化探普查在西天山伊什基里克山东部发现了一个巨大的金地球化学块体,通过对金异常查证、评价发现了博故图小型金矿床。结合勘查区地质特征,开展了地质、物探、化探综合勘查工作,圈定了多处化探异常和激电异常,查明了含矿构造带的特征,通过槽探、钻探验证,发现了40多条金矿体,金资源量达大型,取得了较好的找矿效果。     

综合物探方法在湖北大冶鸡冠咀铜金矿深部及外围找矿中的应用

以鸡冠咀铜金矿床深部及其外围找矿预测为目标,在深入认识鸡冠咀铜金矿床地质特征的基础上,对研究区重力、磁测、电法测量资料进行精细反演,研究含矿地质体与物探异常的对应关系,获取矿区深部和外围物探异常信息。证实研究区岩矿石物性差异明显、与矿有关的地质体与重磁异常具有良好的吻合性,证实研究区内断裂接触带、大理岩俘虏体、隐伏岩体表现出重磁同高、重磁异常梯度带等特征,是寻找深部盲矿体的有利部位。总结了5种地球物理找矿标志,构建了“一个主要目标,两种分析,三种方法,五个找矿标志”的矽卡岩型铜金矿床的地球物理找矿模式,对鸡冠咀矿区深部及外围进行靶区优选,指导鄂东南矿集区矿产勘查工作,具有良好的示范作用。     

西天山哈尔嘎嘎林恩铜金矿床地质特征及综合找矿模型

哈尔嘎嘎林恩铜金矿床位于西天山阿吾拉勒铁-铜-金多金属成矿带东段,矿区下石炭统艾肯达坂组地层大面积出露,海西晚期闪长岩类分布广泛,NNW向及NW向断裂构造发育。目前已发现的6个铜及铜金矿体均产于艾肯达坂组火山碎屑岩中,主要矿石矿物为黄铜矿、斑铜矿及辉钼矿。钾化、黄铁绢英岩化、青磐岩化等蚀变发育,具斑岩型矿床围岩蚀变典型分带特征。1∶1 000地质-化探剖面测量结果表明,Cu、Au、Mo、Ag等元素含量变化趋势一致且与矿(化)体及钾化蚀变吻合较好;瞬变电磁及磁法测量结果均指示Ⅱ、Ⅲ号矿体SE端深部可能存在隐伏岩体。根据矿床地质、地球化学和地球物理特征,构建了综合找矿模型,并对区内下一步找矿方向进行了预测,认为区内寻找斑岩型多金属矿床的潜力巨大,勘探重点为瞬变电磁高阻异常、正磁异常及化探组合异常叠加区域3 000m标高以下地段。     

隐伏铜镍矿异常灰色关联滤波圈定法

在新的铜镍矿异常圈定方法的研究中，我们把灰色系统理论与地质、物探、化探方法相结合，提出了以已知矿床上建立的参考数列系为灰色子波，对研究区的比较数列系进行关联度扫描，从中圈定关联度异常，预测矿床赋存部位的灰色关联滤波法．该方法在新疆哈密研究区作了隐伏铜镍矿床预测试验，在找矿信息的采集中，选取了地质、物探、化探标志１３个．预测实践表明，关联度异常的展布与铜镍矿床的位置相对应．根据研制的方法设计的ＺＫＹ１孔，在离地表１１０～１９０ｍ，钻遇５０多米铜镍矿，证实了该方法适用于大比例尺隐伏矿床预测．     

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.     

Inter-regional correlation of transgressions and regressions in the Cretaceous period

Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous.     

The lamprophyres of Afyon stratovolcano,western Anatolia,Turkey: description and genesis

The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism.     

METAMORPHIC PETROLOGY

正20140751 Guo Xincheng(Geological Party,BGMRED of Xinjiang,Changji 831100,China);Zheng Yuzhuang Determination and Geological Significance of the Mesoarchean Craton in Western Kunlun Mountains,Xinjiang,China(Geological Review,ISSN0371-5736,CN11-1952/P,59(3),2013,p.401-412,8     

GEOCHEMICAL EXPLORATION

正20141058 Chen Ling(Key Laboratory of Mathematical Geology of Sichuan Province,Chengdu University of Technology,Chengdu610059,China);Guo Ke Study of Geochemical Ore-Forming Anomaly Identification Based on the Theory of Blind Source Separation(Geosci-     

SEISMIC GEOLOGY

正20141334 Chen Kun(Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Yu Yanxiang Shakemap of Peak Ground Acceleration with Bias Correction for the Lushan,Sichuan Earthquake on April20,2013(Seismology and Geology,ISSN0253-4967,CN11-2192/P,35(3),2013,p.627-633,2 illus.,1 table,9 refs.)Key words:great earthquakes,Sichuan Province     

HISTORICAL GEOLOGY & STRATIGRAPHY

正20141624 Cai Xiongfei(Key Laboratory of Geobiology and Environmental Geology,Ministry of Education,China University of Geosciences,Wuhan 430074,China);Yang Jie A Restudy of the Upper Sinian Zhengmuguan and Tuerkeng Formations in the Helan Mountains(Journal of Stratigraphy,ISSN0253-4959CN32-1187/P,37(3),2013,p.377-386,5 illus.,2 tables,10 refs.)     

PALEONTOLOGY

正20142263Lü Shaojun(Geological Survey of Jiangxi Province,Nanchang 330030,China)Early-Middle Permian Biostratigraphical Characteristics in Qiangduo Area,Tibet(Resources SurveyEnvironment,ISSN1671-4814,CN32-1640/N,34(4),2013,p.221-227,2illus.,2tables,22refs.)Key words:biostratigraphy,Lower Permian,Middle Permian,Tibet     

MATHEMATICAL GEOLOGY

正20142560Hu Hongxia(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,China);Dai Lixia Application of GIS Map Projection Transformation in Geological Work(Jilin Geology,ISSN1001-2427,CN22-1099/P,32(4),2013,p.160-163,4illus.,2refs.)     

GEOCHEMISTRY

正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3),