屋顶雨水回灌裂隙岩溶含水层连通示踪试验   总被引：1，自引：0，他引：1  

何茂强  王维平  朱平 《地下水》2012,(2):3-5

雨水回灌后对岩溶水的影响分析和效果需要对回灌井和下游的观测井监测数据说明。由于岩溶含水层中岩溶发育极不均匀,在测定地下水位并判定出地下水流向的基础上,连通示踪试验是选择与回灌井相对应的观测井的有效办法。用氯化钠作为示踪剂,监测不同测井不同埋深地下水电导率随时间变化的方法确定了岩溶水观测井选址、岩溶含水层的结构及水文地质条件。示踪试验结果表明,3#观测井(西院井)可用来监测雨水回灌效果,并计算出该地区的地下水势流速在9 m/h～20 m/h之间。该成果对北方地区岩溶含水层回灌和环境评价具有重要的参考价值。  相似文献   

老挝东泰钾盐矿区矿床控矿因素探析     

成世才  宋永芬  马浩宁  亓协全  潘爱宏 《山东地质》2012,(4):15-18,29

通过对区域地质、构造和岩相古地理的研究,从成矿阶段的角度,将控矿因素分为背景控矿因素、沉积控矿因素、改造控矿因素。得出：背景因素为区域性盆地沉积环境形成条件;沉积控矿因素直接控制了工区石盐矿层的层理形态;改造控矿因素中,局部构造对矿层的改造是矿区盐层多呈背斜分布且轴部较两翼矿层大幅变厚的原因,钾石盐出现在光卤石矿层顶部是因为上部裂隙水或者封存的老卤水向下侵蚀光卤石矿层顶部,溶蚀了溶解度相对较大的MgCl2,而溶解度相对较小的KCl被保留下来,从而多在上盐层光卤石矿顶部形成再生或次生钾石盐矿。  相似文献   

泰安市岩盐资源开发利用与保护工作探析     

张树淇  李文孟  李庆广  郝瑞娥 《山东地质》2012,(3):61-64

随着岩盐资源开发强度逐年加大,开发利用保护任务日渐繁重,由于岩盐独特开采方法和工艺,应探索相应的监管措施和手段。通过对大汶口岩盐资源赋存特点和开发利用现状分析,指出其开发过程中存在的问题,就岩盐开采方法和工艺的监管措施和手段进行探索,提出开发利用和保护建议,从而有利于促进加强岩盐资源的开发利用和保护工作。  相似文献   

采煤对峰峰矿区黑龙洞泉岩溶水系统影响程度评价   总被引：3，自引：0，他引：3  

方向清  傅耀军 《中国煤炭地质》2012,(3):25-30

在分析峰峰矿区采煤与黑龙洞泉岩溶水系统关系和矿床水文地质资料基础上,确定开采规模、构造复杂程度和岩溶水水压等9个因素为采煤对黑龙洞泉岩溶水系统水量、水质和环境影响的主要因素,运用基于MAPGIS的层次分析法。就采煤对黑龙洞泉岩溶水系统影响程度进行了评价．将峰峰矿区采煤对黑龙洞泉岩溶水系统影响程度分为强、较强、中等、较小、小五个等级,为矿区煤炭资源科学开采和区域水资源保护提供了依据。  相似文献   

长江河口盐沼湿地酸挥发性硫化物的时空分布特征及影响因素     

王永杰  郑祥民  周立旻  翟立群  钱鹏  吴永红 《地球化学》2012,(2):158-165

以长江河口典型潮间带(崇明东滩湿地)不同地貌单元植被根际柱样沉积物(0~33 cm)为研究对象,探讨了长江河口潮间带表层沉积环境中酸挥发性硫化物(AVS)的时空间变化特征及其与环境因子的关系.结果表明,不同植被根际沉积物中 AVS 含量存在显著季节变化,表现为:互花米草大于海三棱藨草和芦苇.各采样点根际沉积物中 AVS 含量垂向变化为:高潮滩芦苇,随深度的增加而降低;中潮滩互花米草与海三棱藨草,随深度的增加先增大后减小,且在地面下约20 cm 处显著增大. Pearson 相关分析表明,沉积物中 AVS含量与<16μm 的颗粒物、有机碳含量及含水率之间不存在简单的正相关关系.根际沉积物中 AVS 含量的时空变化可能受潮汐、植被生长等因素的综合影响,其时空变化特征反映了长江河口潮滩复杂多变的氧化还原条件.与芦苇和海三棱藨草相比,入侵物种互花米草对沉积物中硫酸盐异化还原有显著影响,其可能改变了潮滩湿地生态系统原有的氧化-还原生物地球化学循环过程  相似文献   

长江口盐沼土壤有机质分布与矿化的空间差异   总被引：2，自引：0，他引：2  

陈庆强  杨艳  周菊珍  张国森  崔莹 《沉积学报》2012,30(1):128-136

在长江口崇明东滩两类植被(互花米草、土著植被)区域分别选择一条纵向剖面,在高潮滩、中潮滩及光滩取得柱状样,利用颗粒有机碳(POC)含量、碳稳定同位素组成、土壤C/N比与颗粒组成等资料,研究盐沼有机质的分布与矿化特征。结果表明,两个纵向剖面的相同高程部位柱样之间,颗粒有机碳δ13C与POC含量的深度特征均存在显著差异;两个柱样的δ13C与POC含量的平均值均相差较大。互花米草对高潮滩柱样有机质的含量与组成均产生了明显影响,对中潮滩柱样有机质组成已有一定影响;土著植被对高潮滩柱样有机质组成的影响显著。盐沼植被对土壤有机质的分布与矿化均产生了明显影响。高潮滩柱样矿化阶段不同的有机质组分混杂,中潮滩柱样有机质的组成相对简单,矿化程度较弱。柱样粘粒含量与含水量在垂向上变化频繁,盐沼原始沉积层序对柱样的物质分布特征具有本底制约。不同高程部位柱样之间,有机质的深度分布特征以及矿化程度差异显著,盐沼碳动态受到潮滩特征性动力沉积过程的显著影响。  相似文献   

Geochemistry of Holocene salt marsh and tidal flat sediments on a barrier island in the southern North Sea (Langeoog,North‐west Germany)     

KERSTIN KOLDITZ  OLAF DELLWIG  JAN BARKOWSKI  RAINER BAHLO  THOMAS LEIPE  HOLGER FREUND  HANS‐JÜRGEN BRUMSACK 《Sedimentology》2012,59(2):337-355

The barrier islands of the southern North Sea were formed during the Holocene sea‐level rise. These islands form part of a highly dynamic environment whose evolution continues today. Subjected to sea‐level changes, tides and storm events, the sedimentary record reflects processes occurring under varying energy conditions. This article presents geochemical, mineralogical and diatom investigations carried out in the salt marsh of the East Frisian barrier island of Langeoog, which is re‐exposed to a rising sea‐level due to de‐embankment. The major aim of this study is to improve the knowledge of the sedimentological and geochemical development of these deposits under the influence of sea‐level rise, with a special focus on the geochemistry and distribution of heavy mineral‐associated elements. Correlation diagrams between FeO, TiO₂ and MnO, as well as ternary plots (Al₂O₃–SiO₂–Zr or TiO₂), clearly indicate the variable appearance of heavy minerals in different lithological facies, comprising marsh soil, mixed and sand flat, and relocated beach sands. A dominating abundance of ilmenite followed by zircon, garnets and some other heavy minerals is evidenced by Scanning Electron Microscope‐Energy Dispersive X‐ray measurements. The data presented here suggests that these geochemical proxies are useful tools for characterizing depositional energy conditions. Increasing depositional energy is evident for the lithological units in the following order: marsh soil, mixed flat, sand flat and relocated beach sand. The energetic conditions during sediment deposition, as well as the sedimentary history, are confirmed by diatom analyses as an additional independent indicator. Depending on source rock composition, the geochemical parameters used in this study may also help to investigate depositional energy regimes of other siliciclastic sedimentary systems.  相似文献   

Calcretes,fluviolacustrine sediments and subsidence patterns in Permo‐Triassic salt‐walled minibasins of the south Urals,Russia     

ANDREW J. NEWELL  MICHAEL J. BENTON  TIMOTHY KEARSEY  GRAEME TAYLOR  RICHARD J. TWITCHETT  VALENTIN P. TVERDOKHLEBOV 《Sedimentology》2012,59(5):1659-1676

The south Uralian foreland basin forms part of the giant, yet sparsely documented, PreCaspian salt tectonic province. The basin can potentially add much to the understanding of fluviolacustrine sedimentation within salt‐walled minibasins, where the literature has been highly reliant on only a few examples (such as the Paradox Basin of Utah). This paper describes the Late Permian terrestrial fill of the Kul’chumovo salt minibasin near Orenburg in the south Urals in which sediments were deposited in a range of channel, overbank and lacustrine environments. Palaeomagnetic stratigraphy shows that, during the Late Permian, the basin had a relatively slow and uniform subsidence pattern with widespread pedogenesis and calcrete development. Angular unconformities or halokinetic sequence boundaries cannot be recognized within the relatively fine‐grained fill, and stratigraphic and spatial variations in facies are therefore critical to understanding the subsidence history of the salt minibasin. Coarse‐grained channel belts show evidence for lateral relocation within the minibasin while the development of a thick stack of calcrete hardpans indicates that opposing parts of the minibasin became largely inactive for prolonged periods (possibly in the order of one million years). The regular vertical stacking of calcrete hardpans within floodplain mudstones provides further evidence that halokinetic minibasin growth is inherently episodic and cyclical.  相似文献   

多功能复合剂在伊塘湖矿区ZK11-1孔的应用   总被引：1，自引：0，他引：1  

黄卫东  付〓帆  胡继良  陶士先 《探矿工程》2012,39(5):1-3

多功能复合剂是一种针对复杂地层钻探研发的新型膨润土有机改性钻井液复合材料。通过敦煌伊塘湖钾镁盐矿区ZK11—1孔的成功应用,证明其具有高效护壁作用,抗盐侵污染能力强,用其配制饱和盐水钻井液可适用于岩盐、钾石盐、光卤石等盐膏地层钻进。  相似文献   

宁深1井深井高温钻井液技术   总被引：1，自引：0，他引：1  

解超  梅永刚 《探矿工程》2012,39(6):27-30

针对麻黄山西部区块深部地层特点及难点,在室内优选抗高温钻井液体系,并对该体系进行性能优化研究,逐步改善其抗温、抗污染能力,并引入SPC-220与磺化处理剂发生高温交联,进一步增强体系的抗盐污染能力。宁深1井现场应用证明,该抗温钻井液体系性能稳定,对井下复杂情况的处理及顺利钻达目的层起到了关键作用。  相似文献