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萨依恒布拉克景区为可可托海世界地质公园五大景区之一,该景区为2017年可可托海国家地质公园申报世界地质公园时新划入的景区,目前该景区处于待开发状态。为了进一步查清可可托海世界地质公园地质遗迹资源,为地质遗迹保护、规划和开发提供科学依据,进一步提升公园科学研究水平及地质遗迹科学内涵,促进公园各景区均衡发展,特开展萨依恒布拉克景区地质遗迹调查与评价工作。 相似文献
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根据野外调查、区域地质环境、地质水文工程地质等资料,对长虫山郊野公园地质灾害危险性进行现状评估、预测评估,提出地质灾害防治措施,为景区公园的规划建设和开展地质灾害防治工作提供依据,对同类景区地质环境的评估有部分借鉴意义。 相似文献
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贵州赤水丹霞国家地质公园内地质遗迹特征及资源评价 总被引：1，自引：0，他引：1
贵州赤水丹霞地质公园是经国土资源部正式授予第六批建设资格的国家地质公园。公园由两个园区构成,是以丹霞地貌景观为核心,以瀑布景观、孑遗植物为重点,兼有峡谷地貌、风景河段、古崩塌堆积体、中小型构造等地质遗迹,属综合性大型国家地质公园。本文介绍了公园内主要的地质遗迹资源及特征,并对其突出价值进行了定性评价。 相似文献
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房山世界地质公园位于永定河西岸,地跨北京市房山区和河北省保定市涞水县、涞源县,总面积953.95km2。划分为8个园区:周口店园区、石花洞园区、十渡园区、百花山－百草畔园区、上方山－云居寺园区、圣莲山园区、野三坡园区和白石山园区。房山世界地质公园是全球唯一位于国家首都的世界地质公园,按照北京“两轴、两带、多中心”的空间布局,属于北京“西部生态带”的范围。建设好房山世界地质公园将对落实科学发展观、建设和谐社会、带动首都西南区域经济发展起到积极的推动作用。2012年7月21日,房山地质公园出现了多年一遇的强降雨,导致地质灾害发生,科学建设是地质公园发展的当务之急。 相似文献
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地质公园规划若干问题探讨——以龙门山国家地质公园彭州园区为例 总被引：8，自引：1，他引：8
从地质公园的定义出发，通过地质公园与风景名胜区的对比，指出了地质公园与风景名胜区规划的差异。以龙门山国家地质公园彭州园区为例，对地质公园规划范围的界定及地质公园规划原则、功能布局等进行了探讨，并提出了点、线、面开放式管理模式。 相似文献
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据中国新闻网2 0 0 4年0 2月0 3日讯,国土资源部公布第三批国家地质公园名单,河南王屋山、四川九寨沟等41处被评为”国家地质公园”。至此,中国的国家地质公园增至85处。第三批国家地质公园名单中,我省四个公园榜上有名。它们分别是:贵州关岭化石群国家地质公园、贵州兴义国家地质公园、贵州织金洞国家地质公园、贵州绥阳县双河洞国家地质公园。对这四个国家地质公园的情况,本刊将陆续进行介绍。我国公布第三批国家地质公园名单,贵州四个公园榜上有名@刘家仁 相似文献
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2012年4月23日,经国土资源部批准,河南尧山地质公园获国家级地质公园建设资格。该地质公园由白草垛园区、下汤温泉群及九女洞群典型剖面园区和中汤温泉群及控泉构造园区三大园区组成,总面积126．96平方公里。 相似文献
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广东阳山国家地质公园内地质遗迹特征 总被引：1，自引：0，他引：1
广东阳山国家地质公园是个综合性的地质公园,由六个园区组成。园区内地质遗迹资源十分丰富,主要有岩溶地貌、花岗岩地貌、水体地貌遗迹、构造遗迹。文章介绍了阳山国家地质公园内主要地质遗迹资源的特征,并对其突出价值进行了定性评价。 相似文献
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《上海国土资源》2021,(3)
天津蓟县国家地质公园总面积264.6km~2,分为8个景区,由于各景区陆续、分别开展地质遗迹调查工作,时间跨度较大,使用调查参考规范不同,导致公园内地质遗迹分类方案和评价标准不统一,不利于公园内地质遗迹的开发保护。本文基于天津蓟县国家地质公园内地质遗迹数据,按照《国家地质公园规划编制技术要求》对地质遗迹进行了类型划分,采用定性和定量相结合的评价方法进行等级划分。研究结果表明:公园内主要地质遗迹共有368处,分为地质(体、层)剖面、地质构造、古生物、矿物与矿床、地貌景观、水体景观、环境地质7大类;地层剖面、构造形迹、古生物遗迹等16类;全国性标准剖面、区域(大型)构造、中小型构造等22亚类。具有重要观赏价值和重大科学研究价值的主要为中新元古界剖面类、花岗岩地貌类、石英砂岩地貌类、古生物类、构造形迹类等景观类型。通过综合评价分析,公园有世界级地质遗迹46处,国家级地质遗迹23处,省级地质遗迹58处,县级地质遗迹241处。上述研究以期为蓟县国家地质公园地质遗迹保护与开发提供技术支持和决策参考。 相似文献
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S. Viswanathan K. Surya Prakash Rao B. Mahabaleswar 《Journal of the Geological Society of India》2013,82(6):621-627
Komatiites are mantle-derived ultramafic volcanic rocks. Komatiites have been discovered in several States of India, notably in Karnataka. Studies on the distribution of trace-elements in the komatiites of India are very few. This paper proposes a simple, accurate, precise, rapid, and non-destructive wavelength-dispersive x-ray fluorescence (WDXRF) spectrometric technique for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in komatiites, and discusses the accuracy, precision, limits of detection, x-ray spectral-line interferences, inter-element effects, speed, advantages, and limitations of the technique. The accuracy of the technique is excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Zr, Nb, Ba, Pb, and Th and very good (within 4%) for Y. The precision is also excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th. The limits of detection are: 1 ppm for Sc and V; 2 ppm for Cr, Co, and Ni; 3 ppm for Cu, Zn, Rb, and Sr; 4 ppm for Y and Zr; 6 ppm for Nb; 10 ppm for Ba; 13 ppm for Pb; and 14 ppm for Th. The time taken for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in a batch of 24 samples of komatiites, for a replication of four analyses per sample, by one operator, using a manual WDXRF spectrometer, is only 60 hours. 相似文献
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奥地利安东帕有限公司 《岩矿测试》2009,28(3):306-306
最新的流行病学研究表明,空气中较高浓度的悬浮细颗粒可能对人类的健康有不利的影响。根据该项研究显示,由于心脏病、慢性呼吸问题和肺功能指标恶化而导致死亡率的升高与细尘粒子有关。这些研究结果已经促使欧盟于1999年4月出台了限制空气中二氧化硫、二氧化氮、氧化氮、铅和颗粒物含量的法案(1999/30/EC),对各项指标包括对可吸入PM10颗粒的浓度提出了新的限制性指标。PM10颗粒是指可以通过预分级器分离采集的气体动力学直径小于10μm的细颗粒。目前研究的兴趣重点逐步偏向PM2.5这些更细微颗粒物,PM2.5这种颗粒物对健康有明显的不利影响。在欧盟指令2008/50/EC中,对PM10和PM2.5都提 相似文献
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E. M. Prasolov S. A. Sergeev B. V. Belyatsky E. S. Bogomolov K. A. Gruzdov I. N. Kapitonov R. Sh. Krymsky V. O. Khalenev 《Geochemistry International》2018,56(1):46-64
This paper reports the first results of a study of 11 isotope systems (3He/4He, 40Ar/36Ar, 34S/32S, 65Cu/63Cu, 62Ni/60Ni, 87Sr/86Sr, 143Nd/144Nd, 206–208Pb/204Pb, Hf–Nd, U–Pb, and Re–Os) in the rocks and ores of the Cu–Ni–PGE deposits of the Norilsk ore district. Almost all the results were obtained at the Center of Isotopic Research of the Karpinskii All-Russia Research Institute of Geology. The use of a number of independent genetic isotopic signatures and comprehensive isotopic knowledge provided a methodic basis for the interpretation of approximately 5000 isotopic analyses of various elements. The presence of materials from two sources, crust and mantle, was detected in the composition of the rocks and ores. The contribution of the crustal source is especially significant in the paleofluids (gas–liquid microinclusions) of the ore-forming medium. Crustal solutions were probably a transport medium during ore formation. Air argon is dominant in the ores, which indicates a connection between the paleofluids and the atmosphere. This suggests intense groundwater circulation during the crystallization of ore minerals. The age of the rocks and ores of the Norilsk deposits was determined. The stage of orebody formation is restricted to a narrow age interval of 250 ± 10 Ma. An isotopic criterion was proposed for the ore-bearing potential of mafic intrusions in the Norilsk–Taimyr region. It includes several interrelated isotopic ratios of various elements: He, Ar, S, and others. 相似文献
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Mining induced subsidence can significantly affect mining costs where major surface facilities and natural environment need to be protected. Overburden grout injection is a technology used to control coal mine subsidence by injecting the mine waste material extracted from the coal back into the inter-burden rock during longwall mining. The flowing slurry is here categorised as a nonlinear viscous cohesive (Bingham plastic) fluid. During longwall mining the grout slurry is pumped into the separated beds of the rock mass through a central vertical borehole, which is drilled deep into the inter-burden rock strata above the coal seam. However, a blockage can occur in the injection system when the slurry velocity falls below a certain critical threshold velocity, indicating a material phase change from cohesive-viscous to cohesive-frictional. In situ field injection tests through boreholes have been simulated at a smaller scale at the CSIRO laboratory in Brisbane by pumping the slurry through a radial disk (gap = 4 mm) from its centre. Laboratory experiments indicate a general, nonlinear, cohesive, viscous, frictional model for shear behaviour of the slurry, in which the material shear parameters are functions of the disk radial distance. Complete dimensional and dimensionless analytical solutions have been developed based on an approach related to Bingham–Herschel–Bulkley fluid mechanics. The derived formulae include relations for minimum pump pressure, local pressure and pressure gradient, wall shear stress, volume rate, velocity and velocity gradient. The theoretical results match the experimental measurements. The experiments covered slurries with maximum particle sizes of 0.5 to 2 mm with about 50% being larger than 100 µm. The viscosities at the various solids concentrations were measured with a standard torsion viscometer. This study differs from the previous research in several distinct aspects, namely, consideration of the variable shear parameters rather than fixed values, inclusion of total nonlinear behaviour, and implementation of a friction function to mimic behaviour of the deposited and consolidating stiff slurry, which can cause a significant pressure rise as a result of the increased shear resistance. 相似文献
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岩石密度和超高压岩石折返速率 总被引：1，自引：3，他引：1
在常温常压条件下对中国大陆科学钻CCSD主孔100-3000米岩心样品进行了密度测量,建立了密度连续剖面,并界定了不同超高压岩石的密度值。通过对比高温高压物性实验资料,岩石密度随着退变程度增强而降低,榴辉岩密度变化序列为3.52g/cm3→3.49g/cm3→3.07g/cm3→2.93g/cm3。超高压长英质岩石密度变化序列为3.00g/cm→2.80g/cm3→2.65g/cm3。上述实验资料是讨论不同折返阶段岩石所受浮力的基础,为研究折返速率大小提供了基本参数。本文通过折返板块运动平衡时,上浮力与粘滞力平衡这一关系式,定量研究了大陆俯冲板块的折返速率,认为密度差产生上浮力从而引起折返,温度对板块折返速率的影响最为显著;密度差大小、折返角度、折返板块大小对折返速率也有直接的影响。定量模拟分析表明,在温度高于850℃时,板块的折返速率可以超过100mm/a;当温度降至700℃时,折返速率则低于1.5mm/a。作者认为在折返早期,温度较高,板块快速折返至60-70km榴辉岩相深度;随着传导散热,温度降低,板块以较慢的速率折返至中下地壳。折返速率的估算表明,浮力是板块折返第一阶段(从>100km深部折返至<40km的中下地壳)的主要驱动力。 相似文献
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Alexander E. C. Broberg J. S. Kehren A. R. Graziani M. M. Turri W. L. 《Environmental Geology》1993,22(4):353-361
Bellechester, Minnesota, is a small community of approximately 155 residents located on the county line between Goodhue and Wabasha counties in southeast Minnesota's karst region. Bellechester is served by a 21-year-old wastewater treatment facility (WWTF) consisting of three waste-stabilization ponds. On 28 April 1992 six sinkholes were discovered to have drained cell 2 of the WWTF resulting in the loss of approximately 8.7×106 1 of partially treated effluent and about 600 m3 of soil into previously undetected subsurface voids of unknown dimensions. In the week following the collapse, approximately 200 water wells located within a 5-km radius of the WWTF were sampled in an after-the-fact, emergency sampling program. Twelve samples with elevated fecal coliform levels, 18 samples with nitrate-nitrogen greater than the 10 mg/1 standard, and no samples with elevated chlorides were found. However, the elevated levels could not be unambiguously attributed to the WWTF collapse. This is the third WWTF to fail by sinkhole collapse in southeast Minnesota since 1974. All three collapsed lagoons have been located in similar geomorphic and stratigraphic settings. However, at least two lagoons have collapsed in the adjacent area in northeast Iowa, and these lagoons are located at different stratigraphic positions. Twenty-two WWTFs constructed in southeast Minnesota's karst region in the last 25 years have been identified as subject to potential sinkhole collapse. An unknown but significant number of manure storage lagoons, flood control structures, etc., have also been constructed in the karst region and are at risk. Public agencies are beginning to develop plans to deal with the risk associated with existing and future waste lagoons in this environment. The critical hydrogeologic parameters that can be used to prioritize the risk of collapse at existing facilities include: (1) the lithology of the first bedrock beneath each lagoon, (2) the thickness of surficial materials between the lagoon and the bedrock surface, (3) the presence and construction of liners (seepage rate), and (4) the proximity to existing sinkholes. 相似文献
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Mercury,arsenic, antimony,and selenium contents of sediment from the Kuskokwim River,Bethel, Alaska,USA 总被引：1，自引：0，他引：1
The Kuskokwim River at Bethel, Alaska, drains a major mercury-antimony metallogenic province in its upper reaches and tributaries. Bethel (population 4000) is situated on the Kuskokwim floodplain and also draws its water supply from wells located in river-deposited sediment. A boring through overbank and floodplain sediment has provided material to establish a baseline datum for sediment-hosted heavy metals. Mercury (total), arsenic, antimony, and selenium contents were determined; aluminum was also determined and used as normalizing factor. The contents of the heavy metals were relatively constant with depth and do not reflect any potential enrichment from upstream contaminant sources. 相似文献
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滇东南锡、银、铅、锌多金属矿床主要分布在个旧、白牛厂、都龙3个矿区,而滇东南较大的3个花岗岩体又分别出露在3个矿区或附近.花岗岩体均形成于燕山晚期,岩石化学、矿物成分相似,富含锡、银、铅、锌、钨、铜等成矿元素.矿床主金属元素组合与岩体之间的距离由远而近出现由锡、钨、(铍、铌、钽)→锡、钨、(铁)、铜、铟→锡、铅、锌、银、铟、(锑)有规律的变化.花岗岩浆是成矿物质来源和成矿热源.岩浆侵入初期使上覆地层隆起产生背斜(凹陷部位成向斜);同时使地层产生一系列裂隙、压性断层或层间断裂;岩浆侵入晚期,这些断层再次活动,表现为张性,岩浆产生的含矿热液沿由其活动所造成的断裂迁移、充填、交代、沉淀而形成矿床. 相似文献