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[摘要]白云鄂博地区大地构造位置位于华北板块北缘西段中新元古代裂谷系,在其北部已发现
有赛乌素和比鲁特2 个金矿床,微量元素、稀土元素和H、O 同位素特征表明,白云鄂博群浅变质岩为矿
源岩。区域深断裂为主要的导矿构造,轴向近EW,向W 侧伏的同斜背斜为控矿构造,由其派生的纵张
断裂是主要的容矿构造。矿床成因为热水喷流沉积-热液叠加改造复合型,近年来,构造蚀变破碎带型、
糜棱岩型等新类型金矿体及其深部盲矿体的发现,揭示了该区具有较大的找矿潜力。依据成矿控制条
件,结合物化探测量成果,确定了干斯陶勒盖-敖勒呼地区、赛乌素32 号脉群西部和深部地区2 处找矿
靶区。 相似文献
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内蒙古赛乌素金矿床地质地球化学特征 总被引:1,自引:0,他引:1
赛乌素金矿床位于华北地台北缘狼山一白云鄂博台缘白云鄂博褶断束,矿石类型主要为含金石英脉型,流体包裹体研究表明,包裹体主要以V-L两相气液包裹体为主,及少量CO2包裹体;均一温度为131℃~311℃,平均213%.流体盐度为0.35%~6.74%(wt%NaCI).矿石黄铁矿、方铅矿的δ34S值为+4.69%o~+11.54%O;石英包体δ18OH2o值为3.6%o~4.1%o,δD值为-114%o~-119%o.反映了成矿流体为中-低温、低盐度热液,其来源可能为变质水和岩浆水的混合流体.矿石与地层微量元素对比及稀土元素地球化学特征反映成矿物质主要来自白云鄂博群尖山组地层.综合分析认为,赛乌素金矿床应为中-低温混合热液石英脉型矿床. 相似文献
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白云鄂博金矿、乌拉山金矿,是内蒙古近年来发现的两个中—大型金矿床。 白云鄂博金矿,地处白云鄂博铁矿东北5公里,位于白云鄂博铁矿北矿范围内,地质构造则为白云鄂博台缘坳陷带。川井—白云鄂博深大断裂在矿区通过。区内褶皱、断裂构造发育。在强烈构造活动过程中,伴随区域变质和岩浆活动,具有铁、铌、稀土、金的良好成矿条件。 相似文献
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华北板块北缘西段裂谷系金矿床成矿特征及成因探讨 总被引:3,自引:0,他引:3
白云鄂博群和渣尔泰山群是华北板块北缘中新元古代裂陷谷沉积的陆缘碎屑岩、泥页岩、碳酸盐岩及少量火山岩建造,赋存的典型金矿床有白云鄂博北部金矿床、朱拉扎嘎、浩尧尔忽洞等成型金矿床.从区域成矿角度看,由西向东构成了一个巨大的Au-Cu-Pb-Zn-S(Fe)-Mn-Au-REE-Nb-Fe热水沉积成矿系统.地质特征表明金矿床均具有明显的层控型特点;元素地球化学特征显示金的来源主要与中元古代火山活动及沉积地层有关;同位素年龄暗示一期重要成矿时代与华力西晚期的岩浆-构造事件相耦合.认为金矿床成因可概括为热水喷流沉积-热液叠加改造复合型.显示具有较大的找矿潜力. 相似文献
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内蒙古赛乌素金矿稳定同位素组成特征及成因意义 总被引:1,自引:0,他引:1
内蒙古赛乌素金矿位于内蒙古中部,是一个产于中-新元古代白云鄂博群变质碎屑岩中的中型石英脉型金矿.本文通过对氢、氧、硫、铅稳定同位素地球化学特征研究后认为,成矿热液主要来自岩浆水(图1),硫同位素具有花岗岩的特征,铅同位素特征表明铅来自地幔(图2),因此推断成矿物质主要来自于岩浆活动. 相似文献
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石洞沟金矿位于华北地台北缘的冀东-辽西金多金属成矿带东段,属产于元古宙隆起带内碳酸盐岩中的微细浸染型金矿。据矿体赋存围岩的不同,可分为两种矿石类型:赋存于雾迷山组上部燧石条带白云质灰岩碎裂岩带中的硅质角砾岩型和赋存于铁岭组二段含锰灰岩蚀变破碎带中的破碎蚀变岩型。通过对矿床地质特征的分析,认为矿体产出严格受老马家推覆构造控制,该推覆构造既是导矿构造,又是储矿构造。两种不同类型的金矿化应是该推覆构造所形成的同一成矿系统、同一成矿机制作用的产物。结合矿区地质环境、矿体产出特征与微量元素特征以及矿床成因机制分析,初步认为该矿床成因与深部岩浆或与火山隐爆作用有关,属浅成低温-超低温热液充填型矿床,并具有多期矿化叠加的特征。同时,总结矿体赋存规律,进一步指出该区勘查工作方向,认为该区找矿前景广阔。 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach 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