共查询到20条相似文献，搜索用时 765 毫秒
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为深化莫桑比克上利戈尼亚钽-铌稀有元素成矿带区域成矿规律研究，充分挖掘已有区域成果资料中隐含的找矿有利信息，笔者对所收集莫桑比克北部地区高精度航磁、航放测量网格数据进行转换处理，加强成矿弱信息提取，并在已有成果认识基础上开展区内地质构造的综合推断解释，分析总结区内的航磁、航放异常展布特征及与本区伟晶岩型钽-铌矿的空间对应关系，查明区内主要控矿构造-纳玛玛逆冲推覆带的分布范围和内部断裂构造展布特征。结合区内姆艾尼大型钽铌矿床航空物探综合异常特征，对全区进行类比找矿预测，圈定钽铌矿远景区5处。研究认为，该成矿带北东向延伸被F2断裂错断，南西向断距超过20 km，引起成矿有利区的整体北西转移，追索异常找矿意义重大。 相似文献
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在白银厂铜矿深部及外围地区开展地质找矿任务十分紧迫。磁法在辅助金属矿深部找矿方面效果良好,研究该区磁异常特征可为深部找矿提供依据和参考。本文通过梳理白银厂及其外围1∶50 000地面高精度磁法和航磁实测资料,阐明了该区的岩（矿）石磁性、磁场分布和局部磁异常等特征。利用多种位场转换处理法结合多点实测校正的方法,综合分析磁异常与地层、岩浆岩、构造、矿化蚀变等成矿条件之间的联系,圈定局部磁异常20个,解译断裂构造18条、隐伏—半隐伏岩体6个,并对圈定的局部磁异常进行了解释推断和分类评价。研究结果表明：白银厂铜矿深部及外围地区成矿潜力较好,综合区域成矿规律和地质成矿背景,归纳地球物理找矿信息,进一步优选出找矿远景区7处。研究找矿远景区的特征,指明找矿方向,分析成矿潜力,以期为后续资源勘查提供磁异常依据和参考。 相似文献
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该航磁异常位于黄土覆盖区,通过分析区域地质资料,认为该航磁异常对应地下岩性为五台群的石咀亚群金岗库组地层,金岗库组地层是五台地区主要的含磁铁石英岩建造,结合该航磁异常形态规则,强度较高,推断为隐伏磁铁石英岩矿致异常,通过地面磁法扫面结合典型剖面测量,推断了磁性体的产状、埋深等特征,用钻探进行验证,取得了较好的找矿效果。 相似文献
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新疆东天山某环状熔融岩体与金铅锌矿成矿关系密切,已知矿化产于岩体与地层外接触带附近的断裂破碎带中,需要查明岩体空间展布特征以及断裂构造发育情况。通过对实测的1∶2.5万高精度航空瞬变电磁和航磁数据的处理和分析,可知环状熔融岩体在航磁上表现为正、负相间排列的环状磁场面貌;沿环状熔融岩体出现了4片NWW向展布的条带状电磁响应强烈区,时间常数一般为0.07～0.18 ms。以dB/dt X分量第23道的电磁响应高值带和5～10 nT航磁磁异常带为标志,推断解释了NWW向断裂7条。综合航空电、磁特征及磁矢量三维反演结果,对研究区岩性、构造重新进行了推断解释,大致查明闪长岩体的三维空间展布特征。结合已知矿成矿地质条件和航空电、磁特征,在环状熔融岩体的西部和西南部的电磁响应强烈区圈定了2片找矿有利地区。本次研究为该岩体的深部找矿提供了重要资料。 相似文献
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为了查明安徽省殷家汇地区隐伏岩体的赋存状况,初步圈定侵入性中酸性岩体的范围并推测有利赋矿位置,对地面实测磁异常进行化极、延拓、不同深度场源磁异常分离、垂向导数等数据处理,提取利于识别的剩余磁异常及垂向一阶导数磁异常,结合地质资料解译磁异常特征。结果表明: 区内NE向剩余磁异常带为沿断裂构造侵入的脉岩引起,NE向构造为区内主要的控岩和控矿构造; 推测引起局部剩余磁异常的磁性地质体为隐伏或半隐伏中酸性岩体。该研究为长江中下游铁铜金成矿带中的安庆—盱眙地质矿产调查区成矿远景区划分及找矿靶区初选提供参考。 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
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). 相似文献
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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 相似文献
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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), 相似文献
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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- 相似文献
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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- 相似文献
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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.) 相似文献
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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 相似文献
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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.) 相似文献
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正20140985Chen Liang(Post-Doctoral Research Station of Mining Engineering,School of Nuclear Resources and Nuclear Fuel Engineering,University of South China,Heng-yang 421001,China);Huang Wei Composition of Major and Correlated Elements with Organic Matters and Paleoclimatic Implication for Lower Paleogene Sediments in Sanshui Basin 相似文献