共查询到20条相似文献，搜索用时 46 毫秒
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刘屯金矿床由刘屯(Ⅰ)和金屯(Ⅱ)两个地段组成.作者通过矿床地质特征、深部地球物理特征、金矿体地球化学异常模式判别及矿体剥蚀程度预测等研究,对刘屯金矿床深部成矿提出了新看法,认为Ⅰ地段矿体已剥蚀到中下部,40 m以下矿化尖灭;Ⅱ地段矿体剥蚀至头部,向下有较大延深,可进一步开展深部找矿. 相似文献
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刘屯金矿床由刘屯（Ⅰ）和金屯（Ⅱ）两个地段组成。作者通过矿床地质特征、深部地物理特征、金矿体地球化学异常模式判别及矿体剥蚀程度预测等研究,对刘屯金矿床深部成矿提出了新看法,认为Ⅰ地段矿体已剥蚀到中下部,４０ｍ以下矿化灭灭;Ⅱ地段矿体剥蚀至头部,向下有较大延深,可进一步开展深部找矿。 相似文献
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望谟县坝达金矿位于黔西南地区，大地构造位置为扬子板块西南缘。本文通过对望谟县坝达金矿矿床地质特征、1∶10 000土壤地球化学特征进行综合分析和研究，旨在对望谟县坝达金矿进行找矿远景分析。通过矿床地质特征研究表明，Ⅰ、Ⅱ、Ⅲ矿体均呈脉状，赋矿岩石为领好组一段的含碳酸盐碎屑岩类；矿体产出受两条走向北西的断层破碎带控制；产出于两断裂之间的次级断层内金以自然金、半裸露金和碳酸盐、黄铁矿等包裹金形式存在。1∶10 000土壤地球化学圈定了Ⅰ-Au-As，Ⅱ-Au-As，Ⅲ-As-Sb-Hg，Ⅳ-Au-Hg四个综合异常区，并发现Au和As相关性最强，且在Ⅰ-Au-As异常查证中发现了金矿化。因此，综合研究认为该矿区存在深部隐伏矿体的可能。 相似文献
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测汞在金矿床深部含矿性评价中的应用 总被引：3，自引：0，他引：3
首先介绍了汞化合物的地球化学特征及热释汞测试方法，并以冀西北水晶屯金矿为例，对矿床主要工业矿体的赋存地段（Ⅱ号矿脉），进行了深部含矿性评价。结果表明，不同的汞化合物在评价金矿床深部含矿性中具有很好的指示作用，其评价效果同微量元素评价效果相比有良好一致笥。 相似文献
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云南毛坪铅锌矿区Ⅰ号矿体分布区断裂构造岩稀土元素地球化学特征及找矿意义 总被引：1，自引：0，他引：1
云南毛坪铅锌矿床是滇东北铅锌成矿带中重要的矿床之一，以毛坪铅锌矿床Ⅰ号矿体为例，在深入研究矿床地质特征的基础上，将其赋存地层——宰格组中第二段(D3zg^2)NE向断裂构造岩的稀土元素配分模式划分为四类，讨论了其稀土元素地球化学特征，提出了稀土元素地球化学找矿标志，为隐伏矿预测提供了重要的地球化学信息。 相似文献
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对二连盆地2081铀矿床进行系统采样和分析,以探讨古气候转换对砂岩型铀矿成矿过程的重要意义。利用X射线衍射、扫描电子显微镜等手段分析了赛汉组沉积矿物中矿物含量及其他记录古气候变化的地球化学参数随深度的变化。结果表明,2081铀矿床成矿期古气候演化可划分为5个主要阶段,先后经历了温暖潮湿(Ⅰ)—干冷(Ⅱ)—温暖半湿润(Ⅲ、Ⅳ)—干热(Ⅴ)的演化系列,相应地出现了3个重要的气候转换时期。2081铀矿床的2个重要成矿期与其中2次重要的气候转换期在时间、空间上高度吻合,其中二号矿体的成矿期与Ⅱ—Ⅲ、Ⅳ气候转变期一致,一号主矿体的成矿期与Ⅲ、Ⅳ—Ⅴ气候转变期一致,这些特征表明区域性的气候转换期是形成砂岩型铀矿的重要条件。 相似文献
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雄村矿集区是近年来西藏冈底斯成矿带内发现的一处超大型铜金矿集区, 该矿集区位于冈底斯造山带中段南缘, 其南侧紧邻日喀则弧前盆地.最新的勘探资料表明, 雄村矿集区由Ⅰ、Ⅱ、Ⅲ号斑岩型铜金矿体组成.本文以雄村Ⅰ号矿体为研究对象, 获得Ⅰ号矿体中4件辉钼矿样品的Re-Os模式年龄范围非常一致, 其变化范围为160.1±2.3~163.4±2.3 Ma, 等时线年龄为161±11 Ma(MSWD=4.2), 误差较大, 而平均模式年龄161.5±2.7 Ma(MSWD=2.0), 误差较小.因此, 雄村Ⅰ号矿体的形成时代为160.1±2.3~163.4±2.3 Ma, 最有可能的形成年龄应为161.5±2.7 Ma, 该年龄代表了雄村Ⅰ号矿体的成矿年龄, 这与前人获得的含矿斑岩(含眼球状石英斑晶的角闪石英闪长玢岩)的锆石U-Pb年龄(164.3±1.9 Ma)基本吻合, 表明矿床形成于中侏罗世.同时, 雄村Ⅰ号矿体的含矿斑岩体和赋矿火山岩具有与岛弧火成岩类似的地球化学特征, 如相对富集LREE、LILE, 亏损HREE、HFS, 缺少或微弱负Eu异常.综合来看, 雄村Ⅰ号矿体形成于新特提斯洋俯冲期(>65 Ma), 产出的构造背景为新特提斯洋向北俯冲形成的岛弧环境, 属岛弧型斑岩铜金矿床. 相似文献
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Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引：1，自引：0，他引：1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
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. 相似文献
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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. 相似文献
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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 相似文献
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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- 相似文献
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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 相似文献
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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.) 相似文献
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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 相似文献
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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.) 相似文献
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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), 相似文献
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正20140876 Gao Junbo(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China);Yang Ruidong Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning,Guizhou Province(Geochimica, 相似文献