贵州大方坡缕石矿矿物岩石学特征     

张杰  何林  练强 《矿物岩石》2008,28(4)

利用矿物成分特征、化学成分特征、矿石类型、热学性质特征及坡缕石矿成因等分析方法,对贵州大方县坡缕石进行研究,将坡缕石分为3种类型:Ⅰ型为薄至中厚板片状纤维坡缕石,Ⅱ型为薄-中厚层浸染状坡缕石,Ⅲ型为角砾状粘土状坡缕石。前两种类型坡缕石的SiO2,Al2O3质量分数(平均为54.74%,12.15%)低于苏皖地区龙王山-嘉山等地凹凸棒石;据纤维状坡缕石、浸染状坡缕石的晶体化学特征等分析认为属热液成因类型。纤维状坡缕石热学特征表明主要含吸附水、配位结晶水和沸石水,红外光谱中各频率段吸收峰形态及特征,证明了其所含水类型及结晶程度,并表现出热液型坡缕石谱线特征。  相似文献   

Catalytic ozonation of phenol in water with natural brucite and magnesia     

Kun HE Yuming DONG Lin YIN Aiming ZHANG Zhen LI 《中国地球化学学报》2006,25(B08):101-101

Catalytic ozonation has attracted much attention in treatment of wastewater for its mild conditions. Phenol and its ramifications are common components in a wide variety of wastewaters including those from coal conversion processes, coking plants, petroleum refineries and several chemical industries. In this paper, natural brucite and magnesia have been successfully used in catalytic ozonation of phenol. And the mechanisms of catalysis were also investigated. From Figs. 1 and 2, it can be found that both brucite and magnesia have remarkable catalysis on degradation of phenol and removal of Chemical Oxygen Demand （COD）. The pH of solutions on the process of ozonation alone, catalytic ozonation with brucites and with magnesia were 6.35-2.76, 10.18-8.52 and 10.58-10.83, respectively. It can be concluded that alkali environment plays a critical role for catalytic ozonation of phenol. We also found that the alkaline minerals reacted on the surface with oxalic acid and other low molecular-weight acids which are intermediate products in ozonation, but those intermediate products could be mineralized into carbon dioxide completely with enough ozonation time.  相似文献   

纤粒矿物粉尘体外细胞毒性研究   总被引：6，自引：0，他引：6  

邓建军  董发勤  吴逢春  蒲小允  John Huang  赵世泉 《岩石矿物学杂志》2000,19(3):249-253

采用体外细胞培养技术,观察兔肺泡巨噬细胞死亡率,用丙二醛（ＭＤＡ）的含量变化、乳酸脱氢酶（ＬＤＨ）及超氧化物歧化酶（ＳＯＤ）的活性变化来评价来自１２个矿６床的６种矿物的１２种结晶习性的矿物粉尘的细胞毒性,探讨其使巨噬细胞受损的机制。结果显示：沸石、硅灰石无细胞毒性,而其他的纤维状及片粒状矿物粉尘则表现出不同程度的细胞毒性,说明矿物粉尘的细胞毒性与矿物粉尘的形态有一定关系,但主要由矿物粉尘的特性所决  相似文献   

水镁石——寿山石的一种新型仿制品   总被引：1，自引：0，他引：1  

李建军  刘晓伟  程佑法  刘化峰 《岩石矿物学杂志》2010,29(Z1):100-108

在大批量流通的寿山石收藏品中混有异常样品,本文在对其进行详细常规宝石学参数测验的基础上,进行了红外光谱与X射线能量色散荧光光谱仪分析,确定了矿物成分为水镁石。并在红外光谱测试手段的帮助下,确定了水镁石中常见碳酸盐次要矿物的种类。  相似文献   

纤维水镁石在氨基酸水溶液中的电化学及溶解作用研究   总被引：6，自引：1，他引：5  

李国武  董发勤  万朴  彭同江  宋功宝 《矿物学报》1999,19(3):286-292

在模拟人体温度３７℃条件下,进行水镁石纤维粉尘与氨基酸作用的实验研究,测定在７２ｈ内溶液过程中ｐＨ值的电导率的变化,结果表明,纤维矿物在氨基酸中发生了有机配合作用,并且中性氨基酸对矿物的溶解能力最强。  相似文献   

Climatic signals in lacustrine deposits of the Upper Yacoraite Formation,Western Argentina: Evidence from clay minerals,analcime, dolomite and fibrous calcite     

João Paulo B. Gomes  Rodrigo B. Bunevich  Sandra N. Tonietto  Daisy B. Alves  Julice F. Santos  Fiona F. Whitaker 《Sedimentology》2020,67(5):2282-2309

Authigenic clays are an important control on reservoir quality in lacustrine carbonates but remain challenging to predict. Lacustrine depositional systems respond to climatic variations in rainfall, surface runoff and groundwater input, and evaporation, and result in rapid and frequent changes in lake volume; this is expressed through changing water depth and shoreline position. In the upper portion of the Early Palaeocene Yacoraite Formation of the Salta Basin in Argentina, extensive lacustrine deposits were deposited during the sag phase of rifting. Prior high-resolution stratigraphic studies have suggested that climatic factors control microbial carbonate sequences within a ‘balanced fill’ lake, with variation in the lake level having a major influence on facies association changes. This study characterizes the evolution of facies and mineralogy within the Yacoraite Formation, focusing on the distribution of clay minerals, making a link between the high, medium and low-frequency sequence stratigraphic cycles. The low-frequency transgressive hemicycle of the upper portion of the Yacoraite Formation is comprised of abundant siliciclastic facies, suggesting a wetter period. Microbialites occurring in this interval are coarse-grained and agglutinated. Detrital clay minerals such as illite and chlorite and associated siliciclastic sediments were input to the lake during high-frequency transgressive periods. During high-frequency regressive hemicycles, sedimentation was dominated by carbonate facies with Ca-rich dolomite and the authigenic clays are comprised of chlorite/smectite mixed-layers. By contrast, the low frequency regressive hemicycle records fine-grained agglutinated microbialite with horizons of fibrous calcite, more stoichiometric dolomite, barite and authigenic magnesian smectite. This indicates elevated ion concentrations in the lake under intense evaporation during an arid period. Understanding the conditions that are favourable for formation and preservation of authigenic clays within the lacustrine environment can improve understanding of reservoir quality in comparable economically important deposits.  相似文献   

焙烧温度对纤维水镁石矿物学特征的影响研究     

刘芳芳  牛继南 《岩石矿物学杂志》2024,43(1):89-99

纤维水镁石是一种独特的天然氢氧化物矿物纤维,具有增强增韧和耐高温阻燃等特点,被广泛应用于建筑、阻燃和造纸等领域,将纤维水镁石应用于高附加值产品中具有重要的经济意义,而纤维水镁石的应用与其矿物学特征密切相关。陕西汉中黑木林纤维水镁石矿是目前全球范围内储量最大的纤维水镁石矿床,目前对该地区纤维水镁石矿物学特征的研究较少。本文采用X射线衍射(XRD)、X射线荧光分析(XRF)、场发射扫描电子显微镜(SEM)、氮气吸脱附和热重分析(TGA)等测试方法,对黑木林纤维水镁石进行了矿物学特征测试分析与研究,同时也对热处理后纤维水镁石矿物学特征的变化规律进行了研究,为纤维水镁石的应用提供理论基础,为将其应用于高附加值产品中提供科学依据,从而进一步提高其经济价值。  相似文献   

孤立型纤维性肿瘤CT与病理分析     

柏玉涵  陈军  黄亚冰  苗焕民  查云飞 《CT理论与应用研究》2010,19(3):93-98

目的:探讨孤立型纤维性肿瘤的CT及病理学特点,提高对该疾病的诊断水平。方法:结合文献回顾性分析3例经手术病理证实的孤立型纤维性肿瘤的临床、CT及病理学资料。结果:孤立型纤维性肿瘤在临床上可无症状或因肿瘤压迫出现不典型症状。在CT上3例表现为实性肿块,增强后实性部分轻度强化或明显强化。SFT因有完整的包膜,故多为境界清楚的软组织密度肿瘤。结论:CT对SFT确诊价值有限,诊断必须结合既往病史、临床症状,确诊有赖于病理学与免疫组织化学诊断。  相似文献   

广西德保纤维状须藤石的发现与研究     

杨雅秀  邸素梅 《矿物学报》1992,12(3):206-213,T001

广西德保二叠系合山组的含煤地层中,发现了罕见的白色纤维状二八-三八面体含镁铝的绿泥石——须藤石。电镜下为薄的板条状。结构式:K_(0.01)(Li_(0.02) Mg_(1.73)—Al_(3.13)Fe_(0.02))_(4.90)(Si_(3.10) Al_(0.90))4 O_(10)(OH)_8。单斜晶系,Ⅱ_b多型,修正后的晶胞参数:α=0.5226±0.0002nm,b=0.9061±0.0003nm,c=1.4285±0.0005nm,β=97°11′±2′,V=0.671±0.0004nm~3。实测d_((001))=1.417±0.001nm,d_((060))=0.15098±0.00009nm。底面反射以I_((003))为最强。提供了该矿物的热谱及红外光谱,并研究了它的加热相变。须藤石的围岩为碳质的绢母云钠母云累托石粘土岩。须藤石的纤维集合体呈脉状,多分布在平行岩层间和层内裂隙中,或围绕在黄铁矿的周围。其成因为热液充填和交代。  相似文献   

Genesis of Fibrous Calcite in the Chang 7 Member of the Yanchang Formation, Ordos Basin, China     

LIU Guanglin  LIU Xianyang  MA Xiaofeng  MA Shuang  WANG Xiaofeng  LI Shuo  SHI Zhiqiang  WANG Yanxin 《《地质学报》英文版》2023,97(5):1490-1502

To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin, the petrology, microstructure and geochemistry of calcite veins are studied using thin sections, fluid inclusions, trace elements and isotopic geochemistry. The source, the time of formation, the mechanism of formation, and the dynamic background of the veins are discussed. The veins are mostly made up of calcite, mixed with lenticular or spindle-shape solid wall rock inclusions. Three structures are identified in the calcite minerals: fibrous, rhombic cleavage, and wedge-like structure. Trace elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal fluid. It is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late Triassic. The results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous detritus. The fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of formation. In this way, the research complements and improves the morphology and the mechanism of formation of fibrous calcite.  相似文献