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中国煤中有机硫的分布及其成因 总被引：2，自引：0，他引：2
对来自全国26个省、市、自治区的290个煤样中有机硫的质量分数测试及研究,发现煤中有机硫质量分数基本分布在0%1.0%范围内。在低硫煤中硫分以有机硫为主,在高硫煤中以无机硫为主。中、高硫煤中,广西、湖南等地区很大一部分煤中硫分以有机硫为主。在所采集的样品中,高有机硫煤(有机硫>1%)均分布在华南、华北两大聚煤区,属于石炭、二叠纪煤。高有机硫煤中有机硫质量分数的变化与变质程度无明显关系。煤炭形成过程中海水作用的影响,是导致煤中有机硫含量偏高的最主要原因。 相似文献
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煤燃烧过程中微量元素的迁移和富集 总被引：5，自引：0，他引：5
煤中微量元素在燃烧过程中产生迁移与富集。大部分元素在煤的燃烧产物中得以富集,一些挥发性强的元素将扩散到大气中。在飞灰中,大部分环境有害元素的富集程度与其粒度成反比,即在细粒飞灰中更加富集,由此对人体健康的潜在危害也更大。在我国,大型燃煤电厂的环境问题值得重视,同时大量的民用炉灶产生的环境污染更加严重,值得进一步研究与治理。 相似文献
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一、引言世界上超基性岩的分布同不同时代的褶皺山带有密切的关系,主要的超基性岩都产生在地槽中。根据不完全資料,中国主要的超基性岩也分布在地槽中。如中国北部超基性岩产在古生代地槽华力西褶皺带中;西北超基性岩产在加里东褶皺带中;西南超基性岩侵入于中生代地层中(属于中生代末期燕山褶皺带);也有侵入于新生代可能属于喜馬拉雅造山期的地层中。超基性岩在我国地盾区中也有分布,如西北、东北、华北及西南某些超基性岩均产在震旦纪地盾中。 相似文献
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湖南七里坪－半边街接触交代型硼矿，矿体产于中石炭统壶天群白云岩与燕山期花岗岩接触带的矽卡岩中，产状受岩体顶板形态的控制，多为似层状、透镜状、囊状等。一般离岩体较远的部位硼矿石的品位较富，但靠近岩体的部位矿体较厚大。据微量元素相关系数聚类谱系图分析，Ｂ元素在岩体中呈分散状态，在高温热液中易于聚集，在矽卡岩中富集成矿，在蚀变的白云岩中有轻微的富集。 相似文献
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怀化是我省的重要生态屏障,必须在加快发展中,把保护生态摆在第一位,在保护中开发、在开发中保护,努力实现经济发展与生态保护相融合。——湖南省省长徐守盛 相似文献
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河流储层建筑结构要素的定量识别——以胜坨油田二区沙二段3砂层组为例 总被引：2，自引：0，他引：2
针对地下河流相储层内部建筑结构分析难度大、非均质性突出的问题,在岩芯、露头、钻井、测井资料分析的基础上,以胜坨油田二区沙二段3砂层组（胜二区S32）辫状河沉积体为例,运用Miall的结构要素分析法,进行层次界面解剖、岩相类型和建筑结构要素的划分,提取相应测井曲线特征参数,建立有效的结构要素定量模糊识别模型,并编成软件,对研究区进行了实际资料处理,结果与地质专家解释结果相当吻合,最后建立了储层建筑结构展布模型,精细表征了砂体间的接触方式和连通程度,为进行精确的储层预测和剩余油挖潜提供了地质依据。 相似文献
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复合载体夯扩桩工艺是将地基处理与地基施工合二为一的一种地基加固处理新技术,是一种性价比高的桩型,承载力与其它桩型相比较高,得到建筑界的好评,取得了显著效果。笔者通过两个工程实例的对比,论述该方法的特点、施工工艺及检测结果。 相似文献
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Kristin N. Safi Oswaldo Chinchilla Mazariegos Carl P. Lipo Hector Neff 《Geoarchaeology》2012,27(5):410-425
The Cotzumalhuapa Nuclear Zone (CNZ) is a Late Classic site consisting of three large architectural compounds linked by a series of stone‐paved causeways and bridges. The majority of the site, however, lies beneath layers of recent tephra, leaving the structure of this settlement largely unknown. This study uses ground‐penetrating radar (GPR) to map the subsurface near El Baúl, one of the main compounds, in order to examine the spatial relationship among urban architectural features. Excavation within areas of the GPR survey provides fine‐grain detail of one major architectural feature in the region, the Gavarrete Causeway. The complimentary nature of these data sets characterizes the architectural organization of the settlement at two scales. Spatial patterning between large‐scale architectural features supports the hypothesis that the CNZ represents an integrated urban center with evidence of planned community organization characteristic of other Late Classic period centers across Mesoamerica. 相似文献
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Yuming Liu Jiagen Hou Yongqiang Li Yue Dong Xiaoqiang Ma Xixin Wang 《Journal of the Geological Society of India》2018,91(3):315-322
A new method for characterizing architectural elements of fractured-cavernous carbonate reservoirs was proposed, with application to an Ordovician reservoir in the Tahe Oilfield, Tarim basin. The new method integrates observations from outcrop analogs and concepts from modern karst theory for the mapping and modeling of fractured-cavernous reservoirs. In this paper, fractured-cavernous reservoirs were divided into 4 architectural element types—underground river caverns, sinkholes, discrete internal caverns, and faults. Architectural elements of the Ordovician reservoir in Tahe oilfield were identified and characterized by integrating well logs and seismic data. A new method constrained by faults, karst zones, and seismic acoustic impedance data, was introduced to build a 3D model of architectural elements of fractured-cavernous reservoir in the S48 unit of Tahe Oilfield. A porosity model was then derived from the architectural element model using facies-constrained method. The research provides a work-flow for the characterization of fracturedcavernous reservoirs and determining optimal methods for maximizing oil recovery in the study area or in similar areas. 相似文献
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Internal architecture of a till sheet,Tiskilwa Formation,north‐central Illinois,USA: Application of architectural element analysis 
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下载免费PDF全文 Jessica M. Slomka Carolyn H. Eyles Riley P. M. Mulligan Edward Donald Mckay III Richard C. Berg 《Sedimentology》2015,62(5):1328-1359
Thick till sheets deposited during the Quaternary form significant aquitards in many areas of North America. However, the detailed sedimentary heterogeneity and architecture and depositional history of till units are not well understood. This study utilizes architectural element analysis to delineate the internal sedimentary architecture of the Tiskilwa Formation exposed at two outcrop sections in north‐central Illinois, USA. Architectural element analysis facilitates systematic delineation of sedimentary architecture based on the nature of facies contacts and change in facies associations, delineation of unit geometries and understanding of depositional processes at different scales of resolution; making architectural element analysis suitable for the sedimentological analysis and palaeoenvironmental reconstruction of subglacial deposits. Eleven facies types are identified in this study, including sand, gravel and diamict facies that record a suite of subglacial depositional processes. Detailed analysis of facies contacts (bounding surface hierarchy) and change in facies associations allows the delineation of five architectural elements, including coarse‐grained lens, coarse‐grained sheet, mixed zone, diamict lens and diamict sheet elements. The spatial arrangement and genetic interpretation of elements, and their spatial relationship with fifth‐order bounding surfaces, allows the delineation of five larger scale architectural units (‘element associations’), which can be mapped in the local study area and record at least three stacked successions of meltwater accumulation and till deposition. The results of this study can be utilized for architectural analysis of till sheets and provide insight to groundwater flow pathways through till in the study area and elsewhere. 相似文献
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储层构型研究方法简介 总被引：3，自引：0，他引：3
构型研究是沉积学和储集层地质学目前一个重要的新的研究方法。它把过去二维的模式转化为三维的模式,对解决储集层(体)的不均匀性提出了新的途径。该方法是著名河流沉积学家Miall(1985,1988)提出的。现不少学者运用该方法解决各地区的沉积学和储集层(体)的问题。构型研究从选择构型体到构型单元的研究,直到运用,已有系统的理论和步骤。本文为提倡和推广该方法,向研究者们作一系统介绍。 相似文献
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本文应用建筑结构分析法研究塔河油田一区三叠系下油组砂体内部建筑结构。根据取心井岩心观察识别出12种岩相类型;通过连井剖面对比和测井曲线识别,采用层次分析的思路定义了7级界面;在岩相识别和界面划分的基础上划分出7种结构要素：河道滞留沉积（CHL）、河道充填（CH）、纵向砂坝（LB）、横向砂坝（TB）、落淤层（FS）、越岸细粒沉积（OF）和洪泛平原细粒（FF）;建立了砂体建筑结构平面组合模式：平面以河道充填（CH）和砂坝（CB）为主。 相似文献
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YIN Senlin ZHU Baiyu GUO Haiping XU Zhenhu LI Xiaoshan WU Xiaojun CHEN Yukun JIANG Zhibin 《《地质学报》英文版》2023,97(1):269-285
Three-dimensional unmanned aerial vehicle(UAV) oblique photogrammetric data were used to infer mountainous gravel braided river lithofacies, lithofacies associations and architectural elements. Hierarchical architecture and lithofacies associations with detailed lithofacies characterizations were comprehensively described to document the architectural model, architectural element scale and gravel particle scale.(1) Nine lithofacies(i.e., Gmm, Gcm, Gcc, Gci, Gcl, Ss, Sm, Fsm and Fl) were identifi... 相似文献