内蒙古牧原地区1∶5万土壤测量地球化学异常特征

牧原地区位于大兴安岭岭脊西翼,在开展了4幅1∶5万土壤地球化学测量工作后,获得了较丰富的区域地球化学测量成果。通过对土壤地球化学测量样品系统整理、地球化学参数计算,总结了本区元素分布特征、综合异常特征、相关性及异常元素组合特征,全区共圈定单元素异常417个,综合异常41个,根据异常分布和元素成矿特征,结合地质条件优选出了5处找矿靶区。     

丹巴县措日铅多金属矿区土壤地球化学特征

通过对四川省丹巴县措日铅多金属矿床的土壤地球化学测量,查明了其元素含量特征,确定Pb、Zn、Sb为矿区的主要成矿元素。通过分析主要成矿元素的异常分布特点,结合成矿元素与伴生元素的组合特征,措日断裂为该区主要控矿构造的认识,是指导后续找矿的重要方向,矿质富集主要与中低温热液活动相关。     

丹巴县措日铅多金属矿区土壤地球化学特征

通过对四川省丹巴县措日铅多金属矿床的土壤地球化学测量,查明了其元素含量特征,确定Pb、Zn、Sb为矿区的主要成矿元素。通过分析主要成矿元素的异常分布特点,结合成矿元素与伴生元素的组合特征,措日断裂为该区主要控矿构造的认识,是指导后续找矿的重要方向,矿质富集主要与中低温热液活动相关。     

越城岭界牌铜钨矿区土壤地球化学特征及找矿意义

界牌铜钨矿床位于华南雪峰山弧形构造带南段东缘加里东褶皱带与南岭EW向构造带北缘交汇部位,隶属于南岭成矿带越城岭矿集区。利用数学地质中的因子分析和R型聚类分析,结合矿区成矿地质特征,将矿区矿致异常分为以W-Sn-Bi为主的高温成矿元素组合异常和以Cu-Ag为主中低温成矿元素组合异常。通过分析W-Sn-Bi-Cu-Ag组合异常特征,发现成矿元素异常走向分布与矿区侵入构造走向一致,说明成矿作用严格受构造控制,在侵入接触带附近强烈富集成矿元素,形成具有开采价值的铜、钨矿体。利用元素组合异常及矿区地质特征,圈定5个找矿靶区。通过野外调查、槽探施工确定矿区界牌处AP1、老木冲处AP2和报木山处AP3均为致矿异常,找矿潜力良好,是今后找矿的主攻方向。     

湖南曾家溪锑钨矿区外围土壤地球化学特征及找矿研究

通过对曾家溪矿区外围开展1∶10 000地质填图和1∶10 000土壤地球化学测量,系统总结了矿区的地层、岩性、构造及围岩蚀变等特征,在此基础上,进行了土壤地球化学找矿研究,得出以下几点认识:元素的含量特征及分布型式显示,矿区土壤中W、As、Sb浓度克拉克值和变异系数均较大,元素为对数多峰分布型式,表明这些元素卷入了成矿作用;聚类分析表明,矿区主成矿元素组合为W、Sb、Au、As,其综合异常可作为找矿的直接标志;综合分析地质和地球化学资料,在矿区圈定了4个土壤地球化学异常区,其中Ⅰ号、Ⅲ-1号、Ⅳ号异常带具较好的找矿前景,为下一步找矿工作的重点靶区。     

蓝田县灞源张家沟一带地球化学特征及找矿远景

在1∶1万土壤地球化学测量基础上,对元素的分布特征、组合特征、地球化学特征与地质背景关系、单元素异常特征、组合异常特征、综合异常特征进行分析研究,发现蓝田县灞源张家沟一带金、铅、锌、钨及铌钽铷元素土壤地球化学测量异常特征明显,具有良好的成矿前景。     

青海都兰县拉浪麦矿区土壤异常特征及找矿效果

拉浪麦矿区位于东昆仑伯喀里克—香日德成矿带,在收集矿区地质资料和1∶50 000化探成果的基础上,开展了1∶10 000土壤地球化学测量工作,分析元素Au、Ag、Sn、As、Sb、Cu、Zn、Mo、Pb、W,圈定综合异常13个。通过数理统计和综合研究,确定W、Au、Pb、Ag元素为区内主成矿元素。2013—2015年,先后对AP1和AP4号综合异常进行地表工程验证,发现了3条具有一定规模的工业钨矿体,为拉浪麦矿区矿产勘查指明了方向。     

云南省景谷帕断山矿区土壤地球化学测量效果及找矿前景

帕断山矿区位于兰坪—思茅中生代断陷盆地的普洱中轴断裂带上,成矿环境极为有利。通过对该区开展1∶2.5万土壤地球化学测量,分析元素地球化学特征及地质背景,圈定了12个综合异常,并将其划分为6个综合异常带。在Ⅰ号综合异常带的AP6综合异常处发现并圈定了4条铜矿体、1条低品位金矿体,取得了很好的找矿效果。结合成矿地质条件分析,认为该区找矿前景很好,是寻找热液充填交代型金、铜矿的有利地区,对该区继续开展工作,有望获得突破性找矿进展。     

藏东达翁金矿区土壤地球化学特征与找矿潜力研究

藏东达翁金矿区位于班公湖-怒江成矿带东段,其成矿地质背景和成矿地质条件优越。为研究该矿区找矿潜力,利用SPSS软件对1∶10000土壤地球化学测量获得的Au、Ag、Cu、Pb、Zn、As、Sb、Mo、W、Bi等10种元素数据进行多元统计分析,运用元素异常NAP值累加方法和组合元素NAP值异常评序方法分别对各元素的成矿潜力及综合异常的找矿潜力进行评价。结果表明：区内矿化与中酸性岩浆热液有关,Pb、As、Sb、Ag、Bi是矿化体前缘晕指示元素,Au是主成矿元素,W是近矿指示元素,Cu、Mo是矿化体尾晕指示元素;Au的成矿潜力最大,Bi、Mo成矿潜力较大,Sb、Ag有一定的成矿潜力;区内共圈定土壤地球化学综合异常5个,其中HS-1综合异常找矿潜力最大,其次是HS-4综合异常。结合成矿地质特征和异常查证结果认为,区内具有寻找隐爆角砾岩型金矿、斑岩型钼金矿的巨大潜力及热液型银锑铋多金属矿的较大潜力。     

安徽省泾县茶坑地区金矿土壤地球化学特征与成矿预测

通过土壤地球化学测量工作,查明测区中1.5km2内金、银、铜、铅等元素的含量分布与共生组合特征,圈定金、银、铜、铅等元素异常范围,对测区内的土壤地球化学元素组合进行评价,结合区域地质特征,依据综合多元地质信息分析模型,综合分析后圈出找矿有利成矿预测区,指导矿产勘查工作。     

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.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of     

OCEANOGRAPHY & MARINE GEOLOGY

正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37     

ENVIRONMENTAL GEOLOGY

正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)