ICP-AES内标法测定钛铁矿中铜钴镍锰钒铬     

王卿  回寒星  周长祥  姜云  吕学琴  刘耀华 《山东地质》2012,(5):33-36

采用HCl-HNO3-HF-H2SO4溶矿,利用电感耦合等离子体发射光谱仪内标法（ICP—AES）测定,建立了钛铁矿、钒钛磁铁矿中铜、钴、镍、锰、钒、铬等元素的同时测定方法。对电感耦合等离子体发射光谱仪测定的最佳仪器条件及分析谱线进行了选择,并对钛、铁基体的影响以及采用Y内标元素消除基体的影响进行了研究。实验结果表明：采用内标法能够消除基体对被测元素的影响,改善分析准确度和精密度,与经典分光光度法和原子吸收法相比较,具有检出限低、灵敏度高,操作简便、快速等突出优点。方法经国家一级钒钛磁铁矿标准物质验证,测定值与标准值吻合。  相似文献   

Low-pressure granulite facies metapelitic assemblages and corona textures from MacRobertson Land, east Antarctica: the importance of Fe₂O₃ and TiO₂ in accounting for spinel-bearing assemblages     

G. L. CLARKE  R. POWELL  M. GUIRAUD 《Journal of Metamorphic Geology》1989,7(3):323-335

Low-pressure granulite facies metasedimentary gneisses exposed in MacRobertson Land, east Antarctica, include hercynitic spinel-bearing metapelitic gneisses. Peak metamorphic mineral assemblages include spinel + rutile + ilmenite + sillimanite + garnet, spinel + ilmenite + sillimanite + garnet + cordierite, ortho-pyroxene + magnetite + ilmenite + garnet, spinel + cordierite + biotite + ilmenite and orthopyroxene + cordierite + biotite, each with quartz, K-feldspar and melt. The presence of garnet + biotite- and cordierite + orthopyroxene-bearing assemblages implies crossing tie-lines in AFM projection for the K₂O-FeO-MgO-Al₂O₃-SiO₂-H₂O (KFMASH) system. This apparent contradiction, and the presence of spinel, rutile and ilmenite in the assemblages, is acounted for by using the KFMASH-TiO₂-O₂ system, i.e. AFM + TiO₂+ Fe₂O₃. We derive a petrogenetic grid for this system, applicable to low-pressure granulite facies metamorphic conditions. Retrograde assemblages are interpreted from corona textures on hercynitic spinel and Fe-Ti oxides. The relative positions of the peak and retrograde metamorphic assemblages on the petrogenetic grid suggest that corona development occurred during essentially isobaric cooling.  相似文献   

藤县钛铁矿资源开发面临的若干问题与对策     

黄汉 《南方国土资源》1997,(2)

文章根据藤县钛铁矿开发利用情况，分析了当前该县钛铁矿开发利用面临的几个问题，探讨了在市场经济体制转换的新形势下进一步抓好开发利用的措施与对策  相似文献   

广西某风化壳型钛铁矿碱法强化精选除磷试验研究     

温涛  蒋奇亮 《南方国土资源》1992,(4)

广西某风化壳型钛铁矿床,因其矿石杂质含磷高,主要矿石矿物钛铁矿与钒磁铁矿具镶嵌结构,属难选矿石。其试验样品,如果采用常规的重—磁选联合工艺流程,所获的钛铁矿精矿含磷仍高,达不到产品质量要求,必须除磷。若采取酸浸除磷,则成本高、污染环境。经研究试验实践,采用碱法强化精选除磷工艺,可获得钛铁矿精矿含TiO_249.48%、P0.023%,符合国家YB835—75标准三级品质量要求,同时还可综合回收钒磁铁矿和锆石。此法试剂易得、技术可行、经济效益好。  相似文献   

碎屑重矿物分析对库车坳陷白垩—第三纪物源变化的指示   总被引：12，自引：1，他引：12  

李双建  石永红  王清晨 《沉积学报》2006,24(1):28-35

碎屑沉积是山脉隆升和盆地沉积的直接记录，包括碎屑重矿物研究在内的碎屑沉积物的分析是开展盆山耦合研究的必要手段。对库车坳陷白垩系—第三系砂岩中重矿物含量特征进行了系统的研究，并应用电子探针技术分析碎屑石榴石和钛铁矿的化学组成，研究表明库车坳陷白垩—第三系源区主要由沉积岩、变质岩和酸性火山岩组成。白垩系砂岩中的石榴石来自西南天山蓝片岩和低级变质岩的比例较大，而第三系砂岩中的石榴石中富铁铝榴石组分，多来自高级变质岩。白垩系砂岩中的钛铁矿多来自变质岩，上第三系砂岩中来自火成岩的钛铁矿比例增加。由此可以认为南天山的大规模隆升和剥蚀发生在第三纪以来，由于它的隆升遮挡了南天山北缘古生代增生杂岩体对库车坳陷的物质贡献，并且随着剥蚀的加深，高级变质岩和火成岩的出露越来越多。  相似文献   

X射线荧光光谱熔融制样法测定钛铁矿中主次量组分   总被引：6，自引：12，他引：6  

袁家义  吕振生  姜云 《岩矿测试》2007,26(2):158-159

采用熔融玻璃片法制样，X射线荧光光谱法测定钛铁矿中Fe、Ti、Si、Al、Ca、Mg、Mn、P、S、V和Cr等11种主次量组分。探讨了熔融钛铁矿的有效熔剂，认为Li2B4O7和Li2CO3混合熔剂效果好。方法用于钒钛磁铁矿等国家一级标准物质的测定，结果与标准值相符，对主、次量组分方法精密度（RSD，n=10）为0．20％～9．10％。  相似文献   

Decomposition of ilmenite by concentrated KOH solution under atmospheric pressure     

Yumin Liu  Tao Qi  Jinglong Chu  Qijie Tong  Yi Zhang 《International Journal of Mineral Processing》2006

A new process was provided for decomposition of ilmenite by concentrated KOH solution under atmospheric pressure. The significant effects of reaction temperature, KOH concentration, stirring speed, particle size, and alkali-to-ilmenite mass ratios on titanium extraction were studied. The temperature and initial particle size showed significant influence on titanium extraction. The experimental data of the extraction rates under the relevant operating variables were well interpreted with the shrinking core model under chemically controlled process. The apparent activation energy of the reaction was evaluated using the Arrhenius expression. Approximately 80–85% of the titanium could be leached from the ilmenite ore under the optimal conditions.  相似文献   

Fractionated Ilmenite-series Granites in Southwest Japan: Source Magma for REE-Sn-W Mineralizations     

Shunso Ishihara  Hiroyasu Murakami 《Resource Geology》2006,56(3):245-256

Abstract. Various leucocratic biotite granites, low-temperature I-type, from the middle zone of the Sanyo ilmenite-series granitic terrane were studied chemically. These granites are locally associated with REE-Sn-W mineralizations, and were compared with unmineralized granites and batholithic Ryoke granites in three areas of the Chubu, Kinki and Chugoku Districts. They are unique in the region because they have extremely low ferromagnesian components but high Rb/Sr and 10000Ga/Al ratios. These granites are divided petrographically into the main phase, finer-grained marginal phase and younger sheets and dikelets. These rocks have increasing of HREE+Y and Nb+Ta contents in this order, which is also followed by decreasing zircon saturation temperature from 780 to 725C. Together with the mode of occurrence of these granites, the leucogranitic magmas are considered to have formed by in-situ fractionation of the host granitic magmas near the top of the magma chambers. The concentration of HREE, Y, Nb and Ta in these Sanyo Belt leucogranites is principally controlled by magmatic fractionation.  相似文献   

Resource Evaluation and Some Genetic Aspects of Indium in the Japanese Ore Deposits   总被引：7，自引：1，他引：7  

Shunso Ishihara    Kenichi Hoshino  Hiroyasu Murakami  Yuji Endo 《Resource Geology》2006,56(3):347-364

Abstract. There have been two primary sources for industrial indium; one from massive sulfides, while the other is dissemination-veins and skarns, related to felsic igneous rocks. The latter group of the In-bearing deposits is abundant in the Japanese Islands. Indium occurs as In-minerals such as sakuraiite, roquesite, laforetite and many unidentified minerals, but the majority is contained as an impurity in sphalerite, and tin and copper sulfides. Average grades of the ores from which indium has been extracted vary from a few ppm (e.g., Kosaka mine) to more than 300 ppm (Toyoha mine). The amount of indium in all the major basemetal deposits is estimated by analyzing representative samples. The main indium deposits are subvolcanic and tin-poly-metallic vein types. The largest one is Toyoha mine (4,700 tons hi) and the Ashio mine (ca. 1,200 tons In) was found to be the second largest. Many small occurrences, were recognized in the Miocene magnetite-series belt, besides the classic occurrences in the ilmenite-series granitic terrains of SW Japan, including the Ikuno and Akenobe tin(-tungsten) polymetallic veins, located in the northern margin of the late Cretaceous Sanyo ilmenite-series province. Magnetite-series magmas with deep source are necessary to concentrate sulfur in the magma chamber but sedimentary source rocks and their reducing agents are needed to collect and to precipitate indium. The Japanese islands are essentially accretionary terrains intruded by various deep oxidized magmas; thus forming magnetite/ilmenite-series paired belts, which are sometimes mixed. This unique geologic setting may be the most fundamental reason why indium is rich in vein-type deposits of the Japanese Island arcs.  相似文献   

陕南凤凰岭南缘变质镁铁质—超镁铁质侵入岩矿物学特征——对Fe-Ti 成矿作用的指示     

黄杰  覃小锋  王宗起  张英利  杨文  朱安汉  宋炯 《地质通报》2015,34(203):508-522

陕南凤凰岭南缘变质镁铁质—超镁铁质侵入岩为富含Fe、Ti等有用元素的含矿岩体。利用岩石地球化学方法、偏光显微镜和电子探针技术对该区镁铁质—超镁铁质侵入岩的岩石学、地球化学和矿物学特征进行了研究,并对Fe-Ti氧化物的形成、富集进行了初步探讨,对成岩、成矿作用具有一定的参考意义。结果表明,成矿镁铁质—超镁铁质侵入岩与非成矿镁铁质—超镁铁质侵入岩为不同岩浆源区、同期岩浆作用的产物,镁铁质—超镁铁质侵入岩类的Fe-Ti矿化作用与初始岩浆的源岩之间具有密切关系。Fe-Ti氧化物主要以钛铁矿和榍石的形式存在,局部见少量金红石。化学成分上,钛铁矿具富锰贫镁特征,本区Fe-Ti氧化物的形成和富集过程经历了岩浆结晶分异阶段和热液蚀变阶段。  相似文献