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随着稀土价值的不断攀升,稀土资源乱采滥挖现象日益严重,如何快速准确地进行稀土矿山非法开采监测成为相关政府部门管理的重中之重,高空间分辨率遥感技术为解决上述问题提供了思路。本文选取赣南寻乌地区离子吸附型稀土矿区为研究区,运用IKONOS遥感数据结合矿权资料建立了离子吸附型稀土矿山非法开采解译标志,结合地质岩体资料分析了稀土矿山开采重点监测区域。研究表明高空间分辨率遥感数据处理与分析为离子吸附型稀土矿矿山非法开采快速、准确、动态监测提供了良好的技术手段。 相似文献
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IKONOS遥感数据在离子吸附型稀土矿区环境污染调查中的应用研究——以赣南寻乌地区为例 总被引:2,自引:0,他引:2
稀土矿山的开采活动产生了一系列的环境问题。为解决我国南方离子吸附型稀土矿山环境监测的问题,本文选取赣南寻乌地区为研究区,针对目前离子吸附型稀土矿存在的两大环境问题——土地荒漠化及水体污染,采用IKONOS高分辨率遥感数据进行监测方法研究,运用光谱角分类算法提取了研究区土地荒漠化较为严重的区域,运用ISODATA非监督分类算法对稀土矿开采周边河流污染程度进行评估。通过提取结果分析及野外调研,表明高空间分辨率遥感数据处理与分析为离子吸附性稀土矿矿山环境快速、动态监测提供了良好的技术手段。 相似文献
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通过对福建蛟洋矿山多期卫星影像数据进行比对分析,建立稀土矿山地物解译标志,提取研究区稀土矿开采现况。结合两期影像,运用"最大似然分类法"提取信息分析,进行动态变化监测。研究表明,卫星遥感影像能满足稀土矿山开采动态监测,对我国南方地区稀土矿山动态监测应用具有典型意义。 相似文献
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基于多源多时相遥感数据的稀土开采状况与地质环境问题监测 总被引:1,自引:0,他引:1
稀土矿床开采导致矿产资源极大损失,并造成植被破坏、水土流失、环境污染等严重的地质环境问题。本文选取韶关新丰、清远英德交界区域为研究区,采用2010年到2012年3期不同来源的遥感影像为数据源,在建立解译标志的基础上,采用人机交互解译方法提取各年度的稀土开采状况、矿山地质环境问题及恢复治理情况,并进行野外实地验证。监测结果表明,研究区稀土开采图斑较多,但均已停采,矿山地质环境问题较为严重,且大多未进行有效治理。研究发现,基于多源多时相遥感数据的遥感调查手段,既能利用不同时相数据的时效性优势,又能发挥不同分辨率数据识别各类矿山地物和地质环境要素的能力,有效监测稀土矿区的整体状况和变化情况,为国土、环保等相关部门进行矿政管理和地质环境综合治理决策提供科学依据。 相似文献
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基于GeoEye-1的矿山开发遥感调查与监测应用研究 总被引:1,自引:0,他引:1
以马鞍山矿区为研究区域,采用高分辨率Geoeye-1卫星遥感数据,通过影像的几何纠正、正射校正、融合等预处理,以Mapgis为数据平台,利用采矿权与遥感影像进行叠加,对开采面、矿山占地、尾矿库、矿山建筑、废弃采坑、矿山道路等信息进行解译,结合实地调查,实现矿产资源开发利用状况、矿山环境调查与监测工作。结果表明,Geoeye-1数据能够满足1:1万矿山开发遥感调查与监测,能够准确、客观、实时的监测矿山的越界开采、无证开采、擅自改变开采方式等多种违规类型及矿山开发引发的环境问题,为政府整顿矿山开发秩序、矿山地质环境恢复治理提供重要的技术支撑和决策依据。 相似文献
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《上海国土资源》2015,(4)
稀土矿的违法开采带来一系列问题。为摸清近年来广东省稀土矿违法开采状况,以遥感为主要技术手段对此开展了动态监测研究。以广东省2010~2014年矿产卫片成果为基础,论述了稀土矿违法开采遥感调查技术路线和技术方法,重点分析了广东省2010~2014年稀土矿的违法开采特征与变化趋势,并对存在问题进行了总结与分析。结果表明:广东省稀土矿违法开采总体呈加剧、减弱、反弹趋势,疑似违法开采图斑点多、分布广,但持续违法少,近两年稀土矿开采方式和地点更为隐蔽,遥感监测难度加大。针对稀土矿开采周期短、速度快的特点,建议使用多种类型国产卫星数据开展多次数动态监测;针对稀土矿开采地点偏僻、隐蔽性强的特点,建议在稀土矿违法开采集中分布区开展低空无人机遥感监测。 相似文献
8.
《地学前缘》2017,(5):172-181
选择赣南典型稀土矿区,即寻乌(以轻稀土为代表)、安远(以中稀土为代表)和龙南(以重稀土为代表)为研究区域,于生产期和停产期(停产后半年)分别采集了矿区上游、矿区淋滤废水、矿区山泉水、生活用井水、近矿支流、矿区下游等地表水共90件,分析了溶解态稀土元素在离子吸附型稀土矿区周边地表水中的含量、空间分布特征及影响因素。结果表明:稀土矿的开采对矿区周边地表水中DREE含量影响较大。此外,水粒作用、区域地质背景与风化作用、水化学因素都是影响离子吸附型稀土矿区周边水体DREE行为的主要因素。矿区周边地表水中稀土含量高是我国离子吸附型稀土矿山开采引发的特殊问题。 相似文献
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矿山遥感监测是近年来国土资源部门管理矿产资源开发、整顿和规范矿业秩序的一项重要的矿情调查工作。西藏罗布莎铬铁矿区是我国铬铁矿的主要产区,随着国民经济的快速发展,对铬铁矿石的开采力度和强度在逐年增大。为了更好地促进矿产经济及环境的可持续发展,选用WorldView-2遥感数据,首次深入分析了罗布莎矿山开发过程中不同地物遥感影像特征,建立了各类矿山地物的高空间分辨率遥感解译标志,通过遥感解译与野外查证工作,基本查明了研究区矿山开发状况和矿山地质生态环境现状,并对矿区开发现状与矿山环境进行了统计和分析,基于遥感矿山监测,给出了合理的矿山环境恢复建议。结果表明:WorldView-2作为高分辨率遥感影像,空间分辨率高,包含全色和8个多光谱波段,信息量丰富,解译精度高,在矿山遥感监测乃至更广范围的动态监测中应用可以取得很好的效果。 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
12.
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
13.
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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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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《地学前缘(英文版)》2014,(3):I0001-I0003
正1 AIM AND SCOPE GEOSCIENCE FRONTIERS(GSF) is a bi-monthly international journal that publishes in English high quality original research articles and timely reviews in interdisciplinary fields of Earth and Planetary Sciences.GSF aims to bridge innovative,provocative and challenging concepts and models related to various fields of research including petrology and geochemistry in understanding lithospheric architecture 相似文献
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正1 Introduction In the present paper,MgCl2·6H2O,FeCl3·6H2O,and CeCl3·6H2O were used as raw materials in the precipitationhydrothermal method to synthesize MgF eC e hydrotalcite.The effects of the Fe:Ce molar ratio on the composition,crystal structure,and thermal stability of hydrotalcite are examined.Energy-dispersive X-ray spectroscopy(EDS),X- 相似文献
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正20141430 Chen Ji(Key Laboratory of Petroleum Resources,Chinese Academy of Sciences,Lanzhou 730000,China);Shi Ji’an Sedimentary Facies and Models for the Palaeogene-Neogene Deposits on the Northern Margin of the Qaidam Basin,Qinghai Province(Sedimentary Geology and Tethyan Geology,ISSN1009-3850,CN51-1593/P,33(3),2013,p.16-26,14 illus.,16 refs.) 相似文献
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正20141967An Zhanghui(Lanzhou Base of Institute of Earthquake Prediction,CEA,Lanzhou 730000,China);Du Xuebin Study onthe Geo-Electric Field Variation of Sichuan Lushan MS7.0and Wenchuan MS8.0Earthquake(Chinese Journal of Geophysics,ISSN0001-5733,CN11-2074/P,56(11), 相似文献
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正20141357 Guo Tao(School of Mathematics and Science,Shijiazhuang University of Economics,Shijiazhuang 050031,China);Hu Jiawen Assessment on the New Pressure-Volume-Temperature(PVT) Data of Supercritical Water(Geological Journal of China Universities,ISSN1006-7493,CN32-1440/P,19(3),2013,p.447-455,9 illus.,3 tables,32 refs.)Key words:supercritical fluids 相似文献
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正20141074Bao Xijie(Research Institute of Exploration and Development,Daqing Oilfield Company,PetroChina,Daqing 163712,China)Gather Optimal Processing and Application Effect of Prestack AVA Instantaneous Inversion 相似文献