AMT法勘查贵州铝土矿

贵州铝土矿资源储量丰厚,分布面广,但多为隐伏型沉积型矿,仅有的易辨别、易发现的地表或浅层铝土矿已经开发殆尽,在此开展隐伏铝土矿的物探方法试验研究对今后勘查工作具有重要的指导意义。本文简要介绍了AMT基本工作方法以及贵州金沙长沟工区的地质和地球物理特征,重点讨论了AMT在长沟工区铝土矿勘查中的应用效果,通过对电阻率断面图的综合推断解释,划分出了二叠系、石炭系、寒武系之间地层界面,圈出了含矿有利部位。经钻孔验证,取得了较好的找矿效果。     

青海祁漫塔格地区主要矿床类型找矿方法探讨

基于近年在祁漫塔格地区的勘查实践,初步总结出该区的成矿特征,认为该区主要矿床类型以矽卡岩型铁多金属矿为主,成矿与磁铁矿化密切相关,铁与多金属矿相伴产出,具备磁电方法组合找矿的前提条件。结合生产实例,总结出该区矽卡岩型铁多金属矿有效的勘查方法组合：1：50000磁法扫面确定找矿远景区→1：10000高精度磁测缩小找矿靶区→1：2000磁电剖面定位→钻探验证并控制矿体→井中物探确定矿体范围,找矿效果良好。该找矿方法组合为今后该区科学部署矿产勘查工作起到积极的指导作用。     

激发极化法在新疆奥尔托喀讷什一带锰矿区的找矿效果

虽然传统物探方法在大多数金属矿产勘查中都取得了良好的效果,但在锰矿勘查中的应用却相对较少,这主要是由于锰矿与其围岩的地球物理性质和化学性质差异较小,加大了锰矿的勘探难度,尤其是埋深较大、后期改造强烈的一些锰矿床,勘探难度更大,导致进行直接找矿效果并不显著。笔者近几年主要在巴山锰矿带和塔里木盆地西南缘锰多金属矿区采用不同的物探方法进行锰矿勘查工作,在部分矿区取得了较好的勘查效果。本文主要以塔里木盆地西南缘锰多金属矿区的新疆奥尔托喀讷什一带锰矿区为例,主要介绍了采用激发极化法在该工区开展的具体工作情况以及取得的一些成果认识,表明该方法在寻找隐伏含锰层位具有较好的效果。     

河南栾川Mo多金属矿集区构造地球化学特征及找矿预测

栾川Mo多金属矿集区位于华北陆块南缘与北秦岭造山带的结合部。本文在对栾川Mo多金属矿集区地质特征、构造控岩控矿特征总结的基础上,运用数学地质的方法对矿集区构造裂隙地球化学特征进行分析,根据构造地球化学异常特征圈出有利找矿靶区,工程验证取得明显的找矿效果。这表明构造地球化学-数学地质方法具有良好的找矿效果,为栾川Mo多金属矿集区开展深部矿产勘查工作提供了科学依据。     

被动源反射地震方法在四川拉拉矿田海林铜矿勘查中的应用试验

在四川拉拉铜矿田海林铜矿区的勘查工作中,采用被动源地震方法进行勘查应用试验,将获得的成果与AMT(音频大地电磁)成果进行对比,发现吻合程度较高,并且在深部的分辨率要优于AMT。通过试验证明被动源地震方法可以有效识别出层控型矿床的含矿地层和围岩,为丰富矿产勘查的物探手段提供了有益的应用实例。     

音频大地电磁法在地热勘查中的应用——以福建省宁化县黄泥桥地区为例

为查明福建省三明市宁化县黄泥桥地区地热资源赋存情况,利用音频大地电磁法(AMT)在该区开展地热勘查工作,通过分析工区内地层结构、岩性特征,推断了区内断裂构造分布,根据断裂展布特征圈定了1处优选地热异常靶区,经钻探验证,井孔含水地层与AMT二维反演低阻异常吻合较好。在验证基础上,构建了区内断裂空间分布模型,并根据AMT反演结果和断裂展布特征推断了4处潜在断裂型热储区。     

电法在西藏工布江达县某斑岩型铜矿勘查区的应用

介绍了西藏工布江达县某铜多金属矿勘查区物探测量效果。通过时间域激电中梯面积性测量,圈定出高极化率异常区一处,结合地质及物性资料推测为矿致异常。在此基础上,于异常浓集中心布设剖面运用对称四级装置进行测深工作,识别下伏矿体的展布形态并指导钻孔布设。通过工程施工验证了物探推论,取得良好的效果。测量成果对下一步的地质工程勘查起到了重要的指导作用,指出在该矿区运用电法寻找斑岩铜矿的思路及方法技术。研究结果对冈底斯成矿带及类似地区应用勘查地球物理方法探寻深部斑岩铜多金属矿具有重要的参考价值。     

云南镇康县芦子园铅锌铁多金属矿地质特征及找矿方向

<正>云南镇康县芦子园铅锌铁多金属矿位于三江(造山带)成矿省保山—镇康(地块)Pb-Zn-Cu-Fe-HgSb-As-Au成矿带上(李文昌等,2010),通过勘查深部揭露到厚大的矽卡岩型铅锌铁矿体,探获铅锌金属量419.77万吨,铁矿石量3.13亿吨,为保山-镇康(地块)成矿带上勘查评价的第一个超大型矿床。本文通过对矿床地质特征进行总结,初步指出找矿方向,为下步勘查具有较好的指导意义。     

可控源音频大地电磁法的应用探讨

可控源音频大地电磁法(CSAMT)以其勘探深度大、分辨能力强等特点广泛应用于煤田、金属矿、地下水资源勘查等领域.通过对金属矿勘查的实例应用,分析该方法的应用效果并对工作中的技术问题进行了初步探讨,对今后矿产勘查有较好的借鉴意义.     

海南岛石碌铁、钴、铜多金属矿集区地质特征及找矿方向

海南岛石碌矿区是铁、钴、铜、镍为主的多金属矿集区。在综合分析研究前人找矿成果的基础上,提出了新的深部找矿思路,通过地质、物探、化探等地质勘查,指出了北一—花梨山、南矿—朝阳和近外围（鸡心、武烈、金牛岭）等三个铁、钴、铜（金）矿找矿预测靶区。经钻探工程验证,达到了预期找矿效果,对下一步的勘查工作具有重要的指导意义。     

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).     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

STRUCTURAL GEOLOGY

正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with     

PALEOZOOLOGY

正20141609 Chen Guiying(College of Earth Sciences,Guilin University of Technology,Guilin 541004,China);Han Nairen New Materials of Stylophora from the Upper Cambrian of the Jingxi Area,Guangxi,South China(Acta Palaeontologica Sinica,ISSN0001-6616,CN32-1188Q,52(3),2013,p.288-293,2 illus.,12 refs.)Key words:Stylophora,Guangxi     

GEOPHYSICS

正20140634 Cao Lingmin(Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Xu Yi Finite Difference Tomography of the Crustal Velocity Structure in Tengchong,Yunnan Province(Chinese Journal of Geophysics,ISSN0001-5733,CN11-2074/P,56(4),2013,p.1159-1167,6illus.,35refs.,with English abstract)