辽宁省二道河膨润土矿床地质特征及成因探讨

二道河膨润土矿床位于辽宁西部紫都台-于寺盆地北东缘义县期火山断陷盆地内,矿体赋存于义县组沉凝灰岩及流纹质熔结凝灰岩、珍珠岩等中酸性火山碎屑岩中。矿区共发育70多条层状、似层状膨润土矿体。主要矿石矿物为蒙脱石,具改型特征。浅部主要为钙基膨润土,200m标高以下向钠基膨润土转变。经综合研究认为,该矿床属典型的以后期表生风化淋滤型作用为主的复成因矿床。     

辽宁省阜新北窝棚膨润土矿岩石矿物学特征

北窝棚膨润土矿是近几年在阜新地区紫于盆地中发现的几处膨润土矿之一,为了全面评价北窝棚膨润土矿物理化学特性,利用X射线荧光仪、X射线粉晶衍射仪、红外光谱仪、差热分析仪等测试技术,对北窝棚膨润土矿进行了系统分析研究。测试结果显示:北窝棚膨润土矿主要化学成分为Si O2和A12O3,次要成分中Ca O和Mg O含量较高,K2O和Na2O的含量相对较低,属于钙基膨润土;膨润土矿中主要矿物组分为蒙脱石,杂质矿物为长石、石英和方石英;红外光谱分析和差热分析也验证了北窝棚膨润土矿为钙基膨润土,并具有良好的耐热性能。对合理开发北窝棚膨润土矿具有十分重要的指导意义。     

辽宁省阜蒙县北窝铺膨润土矿床地质特征及控矿因素

阜蒙县北窝铺膨润土矿床位于中生代断陷盆地——于寺盆地中,矿体呈层状、似层状主要赋存于白垩系下统义县组第一岩段火山碎屑岩中。通过矿石阳离子交换量分析和差热分析,确定为钙基膨润土矿床。该矿床的形成受地层控制,沉凝灰岩、凝灰质砂砾岩、流纹质晶屑玻屑熔结凝灰岩与矿床的形成有密切关系。     

辽宁阜新低品位钙基膨润土的改性研究

我国膨润土资源丰富,储量占世界第二位。随着膨润土在化工、陶瓷等领域的应用,需要对钙基膨润土进行改性以拓展新的应用领域。辽宁省阜新北窝棚膨润土矿床是新近发现的风化残积型矿床,产于侏罗纪火山岩中。矿体似层状或透镜状。矿石中蒙脱石含量约为40%-50%,其他矿     

红泉膨润土成因之我见

前言红泉膨润土矿床具有两个显著的特点:(1) 既有钠基膨润土、钙基膨润土,还有一定数量的镁基膨润土;(2)在一般情况下,钙基膨润土在上,钠基膨润土在下,然而红泉膨润土则具有相反的空间分布,即所谓“逆向”分布的现象。红泉膨润土矿中镁基膨润土的发现和研究,不但丰富了膨润土成矿规律的认识,同时还为镁基膨润土的物化工艺性能及应用的研究提供了条件。     

浙江膨润土资源的前景

膨润土是以蒙脱石为主要成分(一般大于50%)的粘土矿物.蒙脱石属二八面体含水的层状铝硅酸盐类矿物.由于蒙脱石结构单元层中的硅和铝离子,分别被铝和镁离子置换因而层间出现电荷有吸附阳离子的作用.根据层间阳离子的不同,可分为钠基膨润土、钙基膨润土、镁基膨润土以及钙     

吉林省沸石矿床地质特征及成矿规律

吉林省自1977年首次发现沸石矿后,其找矿和应用研究工作便很快开展起来。目前已于省内100多个中生代火山岩盆地中圈出40多个成矿远景区,已发现沸石矿床(点)26处。与此同时还在这套含矿火山岩中发现了钠基、钙镁基膨润土、明矾石、高岭石、地开石等新矿     

浙江不同属性膨润土的同位素组成及其形成条件

本文首次综合研究了浙江三个主要膨润土矿床的同位素地球化学。通过多种稳定同位素示踪应用，论述了该区两种不同属性膨润土的同位素组成特征，并提出钠基膨润土为中生代大气降水来源低温地热流体的蚀变产物，其成矿温度大致在７０－９０℃之间。同时，取得了有关原生钠基膨润土经过天然改型形成钙基膨润土的同位素证据。     

关于膨润土阳离子交换量的测定方法

膨润土具有良好的阳离子交换性能，测定它的阳离子交换量(∑E．)和阳离子交换容量(CEC)，是判断膨润土矿蒙脱石含量和划分属型的主要依据，是综合评价膨润土矿的重要指标之一。我国膨润土矿产资源丰富，分布广，矿物成分复杂，给阳离子交换量的准确测定带来一定困难。目前，国内测定膨润土阳离子交换量的方法基本上由土壤分析中沿引过来的，其中应用较多的有氯化铵法、乙酸铵法、氯化钡法与氯化钾法等。本文就有关测定方法讲行了初步研究．     

南京汤山膨润土矿地质特征,物化性质及矿床成因

通过对南京近郊汤山膨润土矿床的矿区地质、矿床地质特征的分析,阐明了该矿床的成因及其矿石的物化性能。综合研究表明,该矿床是以流纹岩及凝灰岩为成矿原岩,在特定的条件下,经热液蚀变改造而形成的矿床。此矿床之矿石属钙基膨润土,经适当选矿后可用于深加工。     

内蒙古鄂伦春自治旗大杨树一带膨润土矿地质特征

通过对内蒙古鄂伦春自治旗大杨树一带膨润土矿地层、构造、围岩蚀变等地质特征的调查研究,查明矿体主要赋存于白垩系下统龙江组的岩屑晶屑凝灰岩及角砾岩中.矿体分为东西两部分,根据埋藏深度和成矿条件,东部矿体分为4层,西部矿体分为3层.通过对矿石的物理化学性能分析,确定了该区膨润土矿石类型属钙基、蒙脱石型,并初步确定矿体的成因类型为火山碎屑蚀变型.     

我国天然钠质膨润土

膨润土又称膨土岩或斑脱岩,是以蒙脱石类矿物为主要成分的粘土岩,是一种含水的铝硅酸盐矿物。 蒙脱石颗粒极细,由于晶格置换晶层表面带有大量负电荷,能吸附可交换性阳离子。以吸附钠离子为主时称为钠质膨润土,以吸附钙离子为主时称为钙质膨润土。此外,还有过渡类型。钠质膨润土具有高的电动电位和极强的水化能,在物性上优于钙质膨润土,从而有广泛应用价值。在冶金工业中用于球团矿的粘合剂。     

内蒙古二道河银多金属矿床的发现及其意义

利用大比例尺物、化探综合方法开展多金属找矿,在二道河地区首次发现了银多金属矿床.认为中酸性侵入体与凝灰岩地层接触带、北东向断裂构造、蚀变带及元素组合异常是寻找银多金属矿的直接标志,为大兴安岭森林沼泽区多金属找矿提供了实用、有效的找矿综合方法模式.     

江苏镇江沸石矿石特征研究

通过对江苏镇江沸石矿石某钻孔样品和开采露头捡块样进行X衍射分析、化学成分分析、吸铵量分析、吸蓝量分析、阳离子交换容量、酸碱度分析等,与样品的颜色相结合分析沸石特征,该钻孔沸石岩矿石的矿物组成主要为斜发沸石、蒙脱石等。     

Characteristics,modification and environmental application of Yemen’s natural bentonite

The bentonite deposit of Lahij Province, Yemen, has very promising commercial applications due to its mineralogy and physical and chemical properties. It was examined to determine its mineralogical composition, chemical and physical properties of the bentonite deposit, purity and sodium-exchanged bentonite. Modified bentonite was synthesized by exchanging cetyltrimethylammonium cations for inorganic ions on the bentonite and its adsorption properties for ammonium were characterized in batch experiments. Analytical methods were carried out to study the bentonite comprising X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy, chemical analysis and kinetic and isotherm models were also tested. The results have shown that the purification of bentonite resulted in a bentonite fractions of the total sample composed of montmorillonite and <5 % quartz. The XRD data showed that the interlayer spacing (d ₀₀₁) of bentonite decreased from 15.3 to 12.5 Å and then increased to 19.7 Å. Moreover, high cation exchange capacity, good water absorption and high swelling capacity were also obtained. The results have shown that the modified bentonite was more effective than the natural bentonite for ammonium removal. In addition to that, pseudo-second-order kinetic model, Freundlich and the Langmuir models described the adsorption kinetics and isotherm well. It was concluded that Yemen (Alaslef) bentonite can be potential adsorbents for ammonium removal.     

大青山东段火山成因非金属矿床地质特征及控矿因素探讨

大青山东段中生代火山成国非金属矿床可划分为两大成因类型,８种基本类型。对不同成因类型矿床地质特征,控矿因素的详尽研究表明：火山穹隆构造与火山岩浆,火山熔岩改造型及火山碎屑岩－熔岩改造型沸石,膨润土矿床有关;火山侵出岩丘控制了珍球岩矿床与沸石矿床的形成。     

Lithium sorption to Yucca Mountain tuffs

The Li ion has been used as a reactive tracer in field tests performed in the saturated and unsaturated-zone in volcanic tuffs at Yucca Mountain, Nevada. Lithium sorbs weakly by cation exchange and permits field-scale testing of laboratory-based predictions of reactive-solute transport. A series of laboratory studies show that Li sorption is nonlinear and varies with lithology in the different horizons of the tuff. In particular, both Li sorption and Li-specific cation-exchange capacity vary as functions of tuff mineralogy, and can be predicted given quantitative X-ray diffraction data. These results indicate that Li sorption is dominated by clay and zeolite minerals, and that sorption coefficients can be predicted given mineralogic analysis results.     

Characterisation of the Egyptian Pliocene bentonite from the Sohag region for pharmaceutical use

This paper aims to prepare purified Na-bentonite with improved properties for its use in the pharmaceutical industry. Calcium bentonite from the Sohag region of Egypt was activated with various proportions of sodium carbonate (2, 3, 5 and 8 wt.%). Additionally, bentonite was purified by sedimentation to eliminate impurities, especially quartz. The results of X-ray diffraction (XRD) and swelling volume data confirmed that raw bentonite was converted to sodium bentonite using 5% Na₂CO₃. The sodium bentonite (M5) obtained by activation met the chemical and microbiological requirements set by the pharmacopoeias regarding toxic trace elemental contents (As, Pb and Cd), the absence of E. coli, the total contents of aerobic microbes and physicochemical properties such as swelling volume, pH and sedimentation volume. Therefore, (M5) bentonite can be designated as being potentially appropriate for pharmaceutical applications. The cation exchange capacity (CEC), surface area, porosity, pH, gel formation and swelling volume data indicated that M5 bentonite could be used to formulate oral suspensions and in topical application.