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文章在对广西陆川米场—博白三滩钨钼矿带成矿地质背景和矿床地质特征综合分析的基础上,对其矿床成因及找矿前景进行了初步探讨,认为陆川米场—博白三滩地区钨钼矿床属于中—高温热液矽卡岩型钨钼矿床和石英脉型钼矿床。 相似文献
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皖南地区区域地球化学特征及成矿潜力的地球化学预测 总被引:1,自引:0,他引:1
根据皖南地区1:20万区域化探资料,计算了区内元素的背景值、区域浓集系数、总体变化系数等参数,阐明了区内元素含量空间分布与成矿元素共生组合特征。使用区域浓集系数及变化系数两个参数,对皖南地区32种元素的成矿潜力进行排序,在目前安徽省地质勘查主攻矿种中,皖南地区的成矿潜力依次为金(银)-钨-钼-铜-铀-锌-铅。同时根据地球化学块体理论和方法,预测了区内金、银资源量,分别为金474t、银16117t,显示出较大的找矿潜力。 相似文献
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对内蒙古陶来托钼多金属勘查区进行地质、地球物理、地球化学综合找矿信息的提取来评价矿区找矿潜力。结果表明,陶来托钼多金属矿是一个以斑岩型钼矿为主的勘查区,发现了斑岩型钼矿床及多处热液脉型铅锌银矿(化)点。成矿岩体为早白垩世花岗斑岩,控矿构造为北东-北北东向断裂。斑岩型钼矿化区与环状激电异常和环状磁异常对应性较好,显示出中低视极化率异常为矿致异常的特征。1∶5万化探异常元素由钼矿化区至铅锌银矿化区表现出Mo、W—Ag、Pb、Zn的侧向分带特征。根据综合找矿信息提取及斑岩型矿床成矿系列建立,指出区内钼矿找矿潜力较大,并预测钼矿区北西侧为热液脉型铅锌银矿的成矿有利地段。 相似文献
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安徽青阳高家塝钨钼矿床成岩成矿时代及其地质意义 总被引:6,自引:4,他引:2
高家塝钨钼矿床赋存于皖南青阳-九华山复式岩体北东缘接触带附近,是安徽省目前探明的规模最大的层控矽卡岩型白钨矿矿床。本文采用LA-ICP-MS方法对高家塝矿区花岗闪长岩和细粒花岗闪长斑岩的锆石进行U-Pb同位素定年,得到年龄分别为144.9±1.2Ma和145±2.0Ma。通过辉钼矿Re-Os等时线定年方法,得到高家塝矿床成矿时代为146.1±4.8Ma。皖南地区燕山期发育两期钨钼成矿作用,分别为146~136Ma和134~128Ma,类似于长江中下游成矿带,分别形成于挤压向拉张转换区和岩石圈快速拆沉减薄的两种构造背景。通过与钦杭成矿带典型钨钼矿床的对比发现,皖南地区钨钼成矿事件集中于燕山期,而钦杭成矿带钨锡成矿事件具有多阶段性。皖南地区同样发育大量与钦杭成矿带相似的花岗岩类岩浆岩,然而到目前为止皖南地区发现的钨锡矿床主要与中酸性花岗闪长岩类密切相关,仅少数矿床与钦杭成矿带成矿岩浆岩(均为高分异的花岗岩类)相似,同时皖南地区锡矿床找矿的突破,表明了皖南地区具有寻找与花岗岩类相关的钨钼矿床和锡矿床的潜力。 相似文献
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北秦岭地区是我国重要的钼金多金属成矿区,区内寺沟钨钼矿为斑岩-矽卡岩型矿床,是蟒岭岩体西缘地区发现的首个隐伏钨钼矿床,其矿床规模达到中型,目前仍在勘查中。利用地质、地球化学、地球物理多学科综合信息找矿方法,很大程度上避免了单一地质勘查方法的多解性和局限性,提高了异常解译精度和可靠性。本文在合理运用多种勘查技术方法,充分总结矿区找矿标志的基础上,建立了一套综合找矿模式:(1)借助15万水系沉积物测量初选找矿靶区;(2)大比例尺土壤地球化学测量缩小找矿靶区;(3)利用岩石地球化学剖面,配合槽探工程查明地表及浅部矿(化)体特征;(4)通过物探测深剖面布设,探索深部成矿有利空间;(5)深部钻探验证并预测找矿远景,同时利用钻探地质信息反向约束物探解译,提高解译精度并指导后续勘查工作。以寺沟钨钼矿为典型矿床,在总结地质、化探、物探等找矿标志的基础上,建立了本区斑岩-矽卡岩型钨钼矿床的地质-地球化学-地球物理综合找矿模型。该模型在矿区深部验证及外围靶区预测中取得了良好的应用效果,目前外围靶区正在进行工程验证,找矿前景良好。 相似文献
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近年来, 皖南地区相继发现了祁门东源钨钼矿、宁国竹溪岭钨银矿、绩溪逍遥钨矿等大型矿产地, 矿产勘查取得了突破性进展。但是, 金多金属矿勘查尚处于探索阶段, 尤其是休宁-歙县地区, 金矿成矿地质条件优越, 矿化异常丰富, 已发现有天井山金矿、小贺铅锌矿、古汊铅锌矿、九亩丘银铅锌矿、璜尖金矿等众多小型矿床或矿化点, 可是尚未获得大型矿的突破, 形成了“只见星星, 不见月亮”的局面。通过资料分析及反复思考, 认识到桎梏皖南金多金属矿勘查的主要原因有两点, 一是地区基础地质工作程度较低, 地质认识老旧, 综合地质研究薄弱; 二是地区成矿规律研究不够, 没有建立区域成矿模式和找矿预测地质模型, 缺少找矿理论体系指导。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
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. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
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. 相似文献
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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.) 相似文献
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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.) 相似文献
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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.) 相似文献
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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., 相似文献
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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 相似文献
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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 相似文献
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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 相似文献
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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.) 相似文献