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1993年9月1日至6日在北京召开的第16届国际化探大会上,在所有的八个分会上共宣读论文94篇,其中金矿化探文章21篇,占22写左右,位居首位。另外在金矿化探专题讨论会上还有15篇特邀文章,在论文展示上也有近四分之一是有关金矿化探的题目。从文章所占的比例和数量上看金矿化探在整个化探学科中仍然占有重要位置。这从一个侧面也反映了化探在找金中起着重要的作用。这些文章内容襄括了世界各地、各种不同景观条件的金矿化探工作,也包括了金的室内外分析的最新方法技术。可以说,这些金矿化探文章比较全面地反映了目前世界各地金矿化探的水平和发展趋势。 相似文献
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本文简要回顾地矿部建立四十年以来的地球化学勘查工作的发展。自1952年地质部成立化探室以来,化探经过早期创业阶段;到60年代化探方法技术水平不断提高,技术队伍逐年发展壮大;1978年以后,化探开始全面迅速的发展。主要在区域化探、金矿化探、岩石地球化学测量、汞量测量以及化探样品分析方法和技术等方面的发展最为显著。近10年来,区域化探在全国覆盖面积达401万平方公里,化探在寻找贵金属和有色金属矿产等方面取得了突出的找矿效果,化探方法技术水平比以往上了一个新台阶,在化探工作方法方面,特别是特殊景观区化探工作方法研究,样品分析技术和质量监控,标准样的制备,计算机技术在化探中的应用,以及化探仪器的研制等均达到国内外较高水平。我部的化探工作展望未来,目标明确,任务艰巨,在今后地质找矿以及环境、农业等领域中的应用,必将发挥更大的作用。 相似文献
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台湾金矿的化探与综合勘探刘家军，陶正章（成都理工学院，成都６１００５９）关键词金矿，化探，综合勘探，台湾台湾的金矿主要为岩金矿，形成于燕山晚期－喜马拉雅山早期（０．９～１．６Ｍａ）。岩金矿周围几乎均有砂矿产出。岩金矿主要分布在两个区域：（１）中央山脉... 相似文献
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北山金矿区成矿地质条件十分有利，与华力西晚期陆相火山-港火山作用有关的蚀变、矿化广泛发育。已有资料证明，矿区东部脉状蚀变岩型金矿化具有一定工业意义。近年来在矿区西部又发现了较大规模呈面型特征的物探高相位电性异常及叠加于其上的化探原生晕Au、As、Sb异常。初步的地质与物、化探综合评价工作证实，矿区西部具有寻找次火山斑岩型隐伏金矿的潜在远景。 相似文献
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胶东莱西下庄地段金矿勘查前景尉成臣，赵维峰（山东省莱西黄金公司南墅金矿）南墅金矿以南２ｋｍ左右的下庄地段，具备金矿成矿条件，有良好的找矿前景。本文在分析其成矿地质条件和化探成果的基础上，对进一步开展金矿勘查作初步的探讨。１招－平叠加构造带内控矿构造分... 相似文献
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化探在明山金矿的找矿效果 总被引：1，自引：0，他引：1
桂西北微细粒型金矿床（点）多是由化探发现，明山金矿即是１：２０万和１：５万区域化探所圈定的异常中，经三级检查，二级查证，并配合深部揭露发现的大型金矿床，矿床位不同构造单元街接地带的断裂构造部位，赋矿层位为中三叠统百缝组，主要富集于黄铁矿，毒砂中，与矿化关系密切的围岩蚀变有硅化，黄（褐）铁矿化，毒砂化，绢云母及碳酸盐岩化，化探标志明显，显示了化探找金的效果及意义。 相似文献
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《西北地质》2016,(1)
化探数据对矿产资源勘查工作有着重要作用,其中比较关键的工作就是从化探数据中识别矿床相关的化探异常信息。在化探异常信息识别工作中也发展出了较多的技术,但是它们大多针对单变量进行分析。为了对多变量化探数据进行分析并识别金矿相关的地球化学异常信息,笔者将逻辑回归模型用于研究区化探数据分析,通过研究区内对金矿预测比较有价值的16种元素的逻辑回归建模及模型应用,发现逻辑回归是一种有效的化探多变量数据分析和建模技术,研究结果显示,笔者建立的逻辑回归模型不仅可以有效识别已知金矿区的地球化学异常信息,而且对那些还未发现矿床的区域具有预测作用,能够为矿产资源勘查工作重点区域的选择提供指导。 相似文献
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着重总结了与偏碱性二长杂岩体有关的东坪－后沟式金矿的地球物理化学异常特征，根据异常特征建立了该类金矿地球物理化学异常综合模型及其化探综合找矿模型，为今后找寻此类金矿尤其是隐伏金矿提供了一套有效的物化探综合找矿方法。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 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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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 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