共查询到20条相似文献,搜索用时 171 毫秒
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杨柳坪岩浆Ni Cu PGE硫化物矿床位于四川丹巴县城南东 178°方位 ,直距 2 0km。东经 10 1°5 4′10″~ 10 1°5 5′0 0″ ,北纬 30°4 1′30″~ 30°4 2′2 0″。该矿床是中国重要的PGE矿床之一 ,PGE金属储量超过 30t。矿区分为杨柳坪、协作坪、正子岩窝 3个矿段 ,总面积约 18km2 ,属丹巴县格宗乡所辖。该矿床的一般地质特征及PGE矿物组合已有报导。与Uitkomst ,Noril sk Talnakh ,Voisey sBayNi Cu PGE硫化物矿床相似 ,杨柳坪Ni Cu PGE硫化物矿床也产出在相对较小的侵入岩体中。为进一步探讨矿床成因及其与矿区附近大石包组… 相似文献
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青藏铁路Ⅱ期工程西藏段西侧湖泊资源与环境 总被引:1,自引:0,他引:1
青藏铁路Ⅱ期工程西藏段西侧地理坐标为东经88°0'~91°57'23″,北纬30°11'54″~32°28'06″,面积约126875km2,有大小湖泊106个。中国地质科学院矿产资源研究所于2001年在距正在修建的青藏铁路Ⅱ期工程约300km处的班戈湖(湖面海拔4522m)建立了目前世界上海拔最高的湖泊资源与环境试验观测站,开展了一系列研究工作。研究区湖泊中有硼、锂、钾、石盐、镁、芒硝、碱、钠、铯等9种盐类资源。班戈湖型卤水提锂的小型蒸发试验表明,卤水制备需采取2阶段方式,并经使用冻出芒硝与卤水分离和“不蒸发而升温”技术,在盐田中已制取含Li2CO322.4%的混盐。这一技术对研究区锂资源开发有借鉴作用。对气象和水文也进行了观测。 相似文献
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刘建清 《四川地质科技情报》1994,(2):35-39
研究区位于东经102°00′~102°15′和北纬29°10′~29°30′,属石棉县田湾乡与蟹螺乡所辖。区内线性、环形构造发育。根据影象上线性体形态以及色调等组合特征的不同,可将区内线性构造带划属韧性及脆性两种剪切带。 相似文献
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青海省曲麻莱县大厂金矿床位于曲麻莱县麻多乡境内,距离玛多县城大约230km千米。地理坐标为东经96°14′45″~ 96°18′00″;北纬35°15′45″~ 35°19′00″。其大地构造位置位于青海境内的巴颜喀拉造山带的北巴颜喀拉造山亚带。大场金矿床是1997年由原青海省地质矿产局第四地质队发现的。目前,该矿床已达超大型金矿规模(丁清峰等,2010)。 相似文献
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察尔汗盐湖钾盐矿床的形成条件 总被引:2,自引:0,他引:2
察尔汗盐湖钾盐矿床的形成条件蔡克勤,高建华(中国地质大学,北京,100083)察尔汗盐湖位于柴达木盆地的中部,是世界上超大型盐湖之一,地理坐标东经94°~96°,北纬36°40'~37°10',东西长168km,南北宽20~40km,面积约4700k... 相似文献
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长江发源地(以下简称“江源”)地处“世界屋脊”青藏高原的腹地,位于东经90°30′~95°20′、北纬32°30′~35°40′。北为昆仑山脉,南为唐古拉山脉,西为可可西里山、乌兰乌拉山、祖尔肯乌拉山,东为巴颜喀拉山,为一东西长约500公里,南北宽约400公里的广阔高原。 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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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 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