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青海南部三江成矿带北缘治多地区铁铜铅锌多金属成矿带矿产资源潜力评价 总被引：7，自引：0，他引：7
本文从区域1∶20万水系沉积物测量、矿区1∶5万水系沉积物和1∶1万高精度磁测异常着手,系统分析了Cr、Ni、V、Co、Ba、Ag、Pb、Zn、Cu等异常元素的分布和富集特征。根据元素组合及所处地质背景,将10处1∶5万水系沉积物测量异常划分为两个带:即由AS1、AS2、AS3、AS4、AS5组成的Cr、Ni、Co、Cu异常带(北带)和AS6、AS7、AS8、AS9、AS10组成的Ba、Ag、Pb、Zn异常带(南带),异常主要分布于三叠系上统巴塘群第一、第二、第三岩组石英砂岩、中基-中酸性火山岩及火山碎屑岩、灰岩、暗绿色安山岩、中基性熔岩等岩石中,并共同构成了三江成矿带北缘铜、铅、锌、银等多金属矿的重要成矿区带;断裂构造、破碎蚀变带及热液活动是引起异常的主要原因。 相似文献
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巴彦高勒银多金属矿是大兴安岭南段新发现的一例小型银多金属矿床,矿体多呈脉状、透镜状产于古元古界锡林郭勒杂岩中,受NE向断裂控制。矿石矿物主要有方铅矿、闪锌矿、黄铁矿、辉银矿、黝锑银矿等,脉石矿物主要有萤石、毒砂、石英、绿帘石、绿泥石等。围岩蚀变主要为褐铁矿化、硅化、高岭土化、黄铁矿化、绿泥石化、绿帘石化等。通过在该矿区开展1∶1万土壤地球化学测量,共圈定出编号为Ht-1至Ht-4的4个矿致组合异常区,并发现了对应的矿脉和蚀变带。根据矿体发育部位和围岩蚀变分带特征,推测成矿与热液活动有关,矿床成因为中低温热液型。通过分析成矿地质特征,得出该矿床浅表以褐铁矿化,深部以硅化、高岭土化为重要的找矿标志,北东向构造破碎带是重要的控矿构造,而1∶1万土壤地球化学测量成果圈出的Ag、Pb、Zn单元素地球化学异常及Ag-Sb-Sn-Cu-Pb-Zn组合异常是十分有效的化探标志。 相似文献
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内蒙古昌图锡力地区地表覆盖严重,地质找矿标志不明显。本次利用1/1万土壤测量、地面高精度磁法测量及激电中梯测量等方法对1/5万水系沉积物测量异常进行查证,通过对物化探异常套合地段开展工程验证,取得了较好的找矿效果。从已发现矿体的空间分布特征来看,地表具有黑色、灰黑色氧化锰矿化蚀变的岩石,可作为寻找锰、银、铅、锌多金属矿体的直接标志;Mn、Ag、Pb、Zn土壤地球化学异常浓度高、元素全、套合好的区域可以作为地球化学找矿标志;线性的弱负磁异常带可以作为磁性方面的找矿标志;高极化率、中高电阻率可以作为电性方面的找矿标志。昌图锡力地区找矿标志的确立,可为该区域寻找同类型矿床提供新的依据。 相似文献
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普老地区Pb、Zn、Sn多金属异常区位于老挝北部长山成矿带,1∶5万水系沉积物地球化学测量发现了以Pb、Sn为主,伴生Zn、Ag、W、Sb、Bi、As、Hg、Cu、Au等元素异常。1∶1万土壤地球化学测量圈定了3个综合异常带,Pb、Zn、Sn等元素具有异常强度高、规模大、浓集中心明显的特点,经异常检查发现铅锌、锡多金属矿化点13处。研究和分析异常区元素的地球化学分布和异常特征,认为该区多金属异常为矿致异常,具有寻找热液型铅锌、锡及多金属矿的潜力。 相似文献
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1∶20万区域化探及区域地质调查成果显示,老迷沟地区为钼、银矿成矿远景区.文章通过对该区进行1∶1万土壤地球化学测量,发现Mo,Ag元素的均值及变异系数较高,且Mo,Ag元素的相关性也较高,综合化探异常由NE向和NW向的Mo,Ag异常带组成,有较多伴生元素叠加,规模较大,呈现较明显的浓集;槽探工程揭露已发现一定规模的钼矿化带,处于NE向断裂破碎蚀变带中,有向深部延伸的趋势.老迷沟地区成矿条件及地球化学环境较好,具有较大的钼（银）矿找矿潜力. 相似文献
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广东英德东山楼金银矿区处于东西向佛冈构造岩浆岩带和北北东向吴川-四会深大断裂带交汇部位旁侧、大镇铜多金属矿田北部,成矿条件十分有利。1∶5万水系沉积物测量显示了较好Pb、Zn、Au、Ag、As等异常。对1∶5万异常进一步解析,在异常浓集中心开展1∶1万土壤测量,共圈定两个综合异常,主要异常元素为Au、Ag、As、Pb,其次为Zn、Sb。通过对1∶1万土壤测量资料进行剖析,结合矿区地质特征,初步认为该区土壤综合异常AP1、AP2具有较大的金银矿找矿潜力。 相似文献
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凉城地区1∶5万水系沉积物地球化学测量中,发现并圈定了43个以Au、Ag、Pb、Cu、Zn等为特征组合元素的综合异常,优选5处找矿远景区,经过异常查证和地质评价,优选找矿靶区,发现多处银、金、铅多金属矿（化）点及有进一步工作价值的矿产地,其中有3处被列为内蒙古地质勘查基金项目,获得了较好的找矿效果。 相似文献
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枪口南银多金属矿位于东昆仑多金属成矿带东段,1：2.5万沟系沉积物测量在矿区圈定出以Ag、Cu、Pb、Zn、Mo为主的综合异常4处.经异常查证,圈出9条矿化带,21条矿（化）体,取得了较好的找矿效果.通过进一步异常查证,在AS1、AS2异常中Ⅶ、Ⅷ和Ⅸ号矿带内圈出银、银铅锌以及银金砷异常高值段,展示出了异常区具较好的银多金属矿的找矿远景.AS3异常内的Ⅳ号含矿花岗斑岩体深部发现多条铜多金属矿（化）体,且发育较强的围岩蚀变,显示具有较好的斑岩型铜多金属矿找矿潜力.AS4异常内Ⅰ－Ⅲ号金矿化带具较好的金多金属矿找矿潜力.本区具有优越的成矿地质条件,化探异常发育,且已发现了较好的银多金属矿找矿信息,充分展示出本区具较大的找矿潜力. 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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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