六块地—厢房硫铁矿地质特征及找隐盲矿方法探讨     

张海峰 《吉林地质》2014,(2):56-58

六块地—厢房矿区的硫铁矿矿体,受下元古界辽河群里尔峪组二段:浅粒岩、变粒岩控制,以电气变粒岩为顶底标志。绿帘石化和绿泥石化为矿体是近矿蚀变,范围较小。电气石化范围广,是较好的找矿标志。利用黄铁矿的热电性确定矿体部位和矿化富集趋势。  相似文献   

TiO₂/电气石复合物的光催化性能     

王玉洁  许双英  赵以辛  蒋引珊 《吉林大学学报(地球科学版)》2012,42(2):514-518

采用溶胶-凝胶法制备TiO2/电气石复合光催化剂,通过光降解甲基橙实验考察复合光催化剂的活性,发现复合物中2%电气石的制备比例就可以显著提升TiO2降解有机物活性,降解率(0.5h)达99.87%,明显优于纯TiO2(0.5h)83.64%,提高了约20%。经XRD、BET、SEM等手段对样品进行分析得知:经800℃以下长时间热处理,电气石的结晶构造不变;900℃热处理使电气石结构破坏。SEM分析显示复合物中TiO2颗粒呈球簇状,均匀包覆在电气石表面形成颗粒膜层。  相似文献   

电气石中硼的溶出机制初探     

卢宗柳  彭省临 《矿产与地质》2010,24(6):562-565

电气石是一种以含硼为特征的硅酸盐矿物,矿物中硼含量在2.78%~3.4%之间,但电气石中的硼被束缚在稳定的晶体结构中难以溶出而被植物吸收,从而影响电气石中硼在农业上的应用。本文通过一系列实验与检测分析,对电气石中硼的溶出机制进行了研究,发现＂高温煅烧十活化剂＂相结合的方法能有效地将电气石中硼的溶出,并初步选定Na2CO3为理想的活化剂,为开发电气石硼肥奠定了理论基础。  相似文献   

DiamondView^TM在有机充填碧玺鉴定中的应用     

魏然  陈华  陆太进 《地质科学译丛》2013,(1):23-27,42

目前主要通过放大检查和红外光谱分析等测试方法对有机充填碧玺进行鉴定,但它们在准确性和直观性方面还存在一些问题。为弥补现有方法的不足,利用DiamondView^TM荧光成像技术对有机充填处理的碧玺样品进行研究。结果显示,在DiamondView^TM下碧玺样品呈绿色或蓝色荧光,部分样品可观察到生长结构特征。分布于碧玺裂隙及凹坑内的有机充填物呈较强的蓝白色荧光,并与碧玺的荧光具有明显的差异和界限。利用DiamondView荧光图像分析,可以快速准确地识别充填物的位置及分布,也为碧玺在充填程度等方面的研究提供了新的思路。  相似文献   

云南南秧田钨矿床电气石的成分和硼同位素特征及成矿意义     

张林奎  张彬  张斌辉  李光明  陈敏华  石洪召  曹华文  张寿庭 《矿床地质》2018,37(3):481-501

南秧田矿床是滇东南地区最大的以钨为主的金属矿床。文章以含电气石花岗片麻岩、无矿电气石石英脉和白钨矿矿化电气石石英脉样品为研究对象,结合地质特征、电气石元素地球化学及B同位素,对电气石成因开展研究。研究显示三类电气石均属于碱性电气石中的镁电气石,以富Mg及Y位中无Al或低Al为特征,具有相对高的FeO/(FeO+MgO)比值(平均0.53);其稀土元素(REE)配分曲线与晚白垩世花岗岩稀土元素配分曲线相似;δ~(11)B值集中在-14‰,与地壳平均值非常接近,这些特征表明其与岩浆期后热液成因的电气石特征一致。电气石石英脉中广泛的钨矿化表明晚白垩世岩浆期后热液对矿区主矿体的叠加富集作用明显,据此提出距晚白垩世花岗岩体数百米至一千米的中源距离为有利矿化区,为矿区外围及深部勘查评价指明了找矿方向。  相似文献   

Tourmaline Reference Materials for the In Situ Analysis of Oxygen and Lithium Isotope Ratio Compositions     

Michael Wiedenbeck  Robert B. Trumbull  Martin Rosner  Adrian Boyce  John H. Fournelle  Ian A. Franchi  Ralf Halama  Chris Harris  Jack H. Lacey  Horst Marschall  Anette Meixner  Andreas Pack  Philip A.E. Pogge von Strandmann  Michael J. Spicuzza  John W. Valley  Franziska D.H. Wilke 《Geostandards and Geoanalytical Research》2021,45(1):97-119

Three tourmaline reference materials sourced from the Harvard Mineralogical and Geological Museum (schorl 112566, dravite 108796 and elbaite 98144), which are already widely used for the calibration of in situ boron isotope measurements, are characterised here for their oxygen and lithium isotope compositions. Homogeneity tests by secondary ion mass spectrometry (SIMS) showed that at sub‐nanogram test portion masses, their ¹⁸O/¹⁶O and ⁷Li/⁶Li isotope ratios are constant within ± 0.27‰ and ± 2.2‰ (1s), respectively. The lithium mass fractions of the three materials vary over three orders of magnitude. SIMS homogeneity tests showed variations in ⁷Li/²⁸Si between 8% and 14% (1s), which provides a measure of the heterogeneity of the Li contents in these three materials. Here, we provide recommended values for δ¹⁸O, Δ’¹⁷O and δ⁷Li for the three Harvard tourmaline reference materials based on results from bulk mineral analyses from multiple, independent laboratories using laser‐ and stepwise fluorination gas mass spectrometry (for O), and solution multi‐collector inductively coupled plasma‐mass spectroscopy (for Li). These bulk data also allow us to assess the degree of inter‐laboratory bias that might be present in such data sets. This work also re‐evaluates the major element chemical composition of the materials by electron probe microanalysis and investigates these presence of a chemical matrix effect on SIMS instrumental mass fractionation with regard to δ¹⁸O determinations, which was found to be < 1.6‰ between these three materials. The final table presented here provides a summary of the isotope ratio values that we have determined for these three materials. Depending on their starting mass, either 128 or 512 splits have been produced of each material, assuring their availability for many years into the future.  相似文献   

电气石硼肥制作技术的试验研究   总被引：1，自引：0，他引：1  

卢宗柳 《矿产与地质》2006,20(6):702-705

硼元素是农作物生长所需的七种微量元素之一。目前给土壤补充硼元素的主要方式是施硼肥(来自硼砂矿),随着硼砂矿资源的日益减少,寻找硼替代资源日渐紧迫。笔者认为,电气石是可替代硼砂的主要矿物之一。利用电气石中硼的关键是将电气石中的硼变为可溶性硼。实验表明,高温焙烧法对电气石中硼的溶出非常有限,而用添加HF等助剂的化学法将电气石中的硼活化溶出的方法,效果较好。因此,可通过化学法先将电气石中的硼元素溶出,然后再加入部分电气石及辅料来制作电气石硼肥。  相似文献   

中条山胡-篦铜矿区富硼气液脉岩的地质特征及有关问题     

王春增  岑博雄  王定域 《地球科学》1992,(5)

对中条山胡-篦铜矿区电气石(岩)的地质特征及有关问题进行研究的结果表明:电气石(岩)是与中元古代西阳河期中-基性火山喷溢作用有关的、主要以脉体形式普遍存在的中(偏低)温富硼气液活动的产物;“条纹状电气石岩”发育于矿区内所有具先存透入性面理岩石中,是变形变质期后富硼气液在此类面理化岩石中拟态定向充填交代所成的脉岩。  相似文献   

Reference Minerals for the Microanalysis of Light Elements   总被引：2，自引：0，他引：2  

M. Darby Dyar  Michael Wiedenbeck  David Robertson  Laura R. Cross  Jeremy S. Delaney  Kurt Ferguson  Carl A. Francis  Edward S. Grew  Charles V. Guidotti  Richard L. Hervig  John M. Hughes  John Husler  William Leeman  Anne V. McGuire  Dieter Rhede  Heike Rothe  Rick L. Paul  Ian Richards  Martin Yates 《Geostandards and Geoanalytical Research》2001,25(2-3):441-463

The quantitative determination of light element concentrations in geological specimens represents a major analytical challenge as the electron probe is generally not suited to this task. With the development of new in situ analytical techniques, and in particular the increasing use of secondary ion mass spectrometry, the routine determination of Li, Be and B contents has become a realistic goal. However, a major obstacle to the development of this research field is the critical dependence of SIMS on the availability of well characterized, homogeneous reference materials that are closely matched in matrix (composition and structure) to the sample being studied. Here we report the first results from a suite of large, gem crystals which cover a broad spectrum of minerals in which light elements are major constituents. We have characterized these materials using both in situ and wet chemical techniques. The samples described here are intended for distribution to geochemical laboratories active in the study of light elements. Further work is needed before reference values for these materials can be finalized, but the availability of this suite of materials represents a major step toward the routine analysis of the light element contents of geological specimens.  相似文献   

热处理对铁-镁电气石中固有电偶极矩的影响     

赵长春  廖立兵  沈恋 《矿物学报》2011,31(1):108-112

对产自云南的电气石进行48 h和72 h热处理,然后在室温和液氮温度下对热处理前后的电气石进行X射线单晶结构分析,计算了电气石在48 h和72 h热处理前后X、Y、Z、T和B多面体的固有电偶极矩和单位晶胞的总固有电偶极矩,分析了铁的价态和热处理时间对多面体固有电偶极矩的影响。结果表明,随热处理时间的增加,样品中的Fe2+氧化为Fe3+;室温下,电气石的固有电偶极矩由未经热处理的5.12×10-29 C.m提高到热处理48 h的5.20×10-29 C.m和热处理72 h的5.39×10-29 C.m,液氮温度下,其固有电偶极矩由未经热处理的4.79×10-29 C.m下降到热处理48 h的4.68×10-29 C.m和热处理72 h的4.42×10-29 C.m;热处理电气石样品的固有电偶极矩随着环境温度的降低而减小,并在相同的温度间隔(室温到-100℃)内,固有电偶极矩的改变量随着热处理时间的延长而增大,因此热处理可以提高电气石的热释电性。  相似文献