贵州省福泉市矿床的稀土元素地球化学特征

经过勘探工作和资料收集对贵州省福泉市矿床进行研究,发现矿床中伴生稀土元素含量较高,综合利用前景大,并具有以下地球化学特征:①稀土总量较高,显示轻稀土富集,重稀土亏损,并以富集Y、La、Nd元素为特征;②a矿层相对于b矿层稀土元素富集,可能与前期的热水、生物作用关联;③稀土元素北美页岩标准化模式曲线向右倾,EU、...     

甘肃白银矿田稀土元素地球化学特征

白银铜多金属矿床,在空间上、时间上、成因上与中酸性火山岩有着密切的成生联系。为了区分含矿与无矿的中酸性火山岩的标志,本文试图从稀土元素方面来探讨白银矿田的地球化学特征,以期对找矿和矿床评价提供依据。     

风化成土过程中稀土元素地球化学特征

探讨了稀土元素在风化成土过程中轻、重稀土分异、富集、迁移规律以及 Ce、Eu异常特征。分别讨论了成土母质、气候条件、水化学性质、氧化还原条件及其它因素对稀土元素地球化学行为的影响。并提出了当前风化成土过程中稀土元素研究中存在的一些问题。     

云南滇池地区下寒武统磷块岩的稀土元素特征及其地球化学演化

该区下寒武统磷块岩可以划分为原生、风化和强风化三种类型矿石，其中的有用组分磷灰石在强烈风化矿石中富集稀土元素，而磷块岩本身的稀土元素特征则取决于其中的矿物组成和风化程度。研究磷灰石和磷块岩中稀土元素的地球化学行为，有重要的理论和现实意义。     

中条山落家河铜矿床稀土元素地球化学特征及地质意义

落家河铜矿区不同岩性的稀土元素含量及配分模式，揭示了一些铜矿床的成岩成矿信息。晚太古代降县期，即中条裂谷活动早期形成了与铜矿床密切相关的基础火山岩。钠长花岗岩的侵入，海底热卤水作用导致了矿质的富集。     

青海大风山天青石矿稀土元素地球化学特征及物源分析

大风山天青石矿床位于柴达木盆地西北缘,由Ⅰ、Ⅱ、Ⅲ、Ⅳ四个矿区组成,赋矿地层为第三系上新统狮子沟组,矿体多呈薄层状、扁豆状或透镜状产于含炭钙质泥岩中,矿石主要为天青石、菱锶矿等。天青石与含矿岩石的ΣREE值较低,LREE/HREE=5.11～7.48,平均为6.58,为轻稀土富集型,Eu具显著正异常,容矿围岩Ce略显弱亏损性特征,显示成矿物质主要来源于深部热卤水;另外,柴达木盆地周缘富含有益元素流体通过化学、渗滤交代等作用后,将有益组分运移至盆地适宜部位富集成矿。由上所述,大风山地区天青石矿成矿物源主要来自于深部热卤水,盆地周缘陆缘碎屑含矿流体也有补给,反映成矿物源具多来源性特征。     

钦杭成矿带南段东岗岭组灰岩稀土元素的地球化学特征

对钦杭成矿带南段东岗岭组灰岩中白云质灰岩和炭质灰岩进行了稀土元素的测试分析,结果表明,ΣREE稀土总量(不包括Y元素)从9.15×10-6到133.88×10-6,平均值为45.62×10-6,LREE/HREE为8.09~16.40,轻稀土富集明显,Ce具有微弱的负异常,Eu有中等的负异常,结合野外观察,认为东岗岭组灰岩为正常海相沉积,成岩温度相对较低,其沉积环境为一个较封闭条件下的浅海海湾。     

贵州下寒武统黑色页岩稀土元素地球化学特征

研究了贵州开阳、织金等地碳质页岩系岩石化学特征及稀土元素特征.样品中K2O含量大于Na2O,与我国南方类型岩石K2O＞Na2O特征相一致.黑色页岩的稀土元素地球化学特征表明,贵州开阳、织金等地区下寒武统牛蹄塘组黑色岩系中稀土元素总量ΣREE为227.47×10-6～623.18×10-6,黑色页岩系稀土均值为532.69×10-6,其稀土总量偏高.黑色页岩系Y含量范围在122.02×10-6～188.40×10-6,均值为155.26×10-6,反映了富集钇的基本特征.黑色页岩中Dy元素发生一定程度富集.LREE/HREE比值为1.35～1.67,表明黑色页岩系稀土含量组成属于轻重稀土相对集中型.与织金磷块岩稀土组成类似,反映了稀土元素形成具有一定渊源性.稀土组成模式及稀土元素配分模式图表明是较典型的海相沉积物稀土配分模式.综合分析得出本区黑色页岩系属正常海相沉积成因.     

柴北缘东段茶卡北山伟晶岩稀土元素地球化学特征及物源分析

茶卡北山地区地处柴北缘东段,位于西秦岭成矿带西段宗务隆成矿亚带;伟晶岩脉具有成群、成带产出特征,岩脉大小不等,已发现伟晶岩脉600余条;稀有金属矿物主要为锂云母、锂辉石、绿柱石、锂电气石等,具有中深伟晶岩特征;伟晶岩类∑REE平均为1.26×10^-6,LREE/HREE平均为13.13,轻重稀土分馏显著,具轻稀土富集特征;(La/Yb)_N平均为27.67,δEu多数大于1.0,平均为2.74,Eu正异常明显;由伟晶岩源区及环境判别图解显示,矿区伟晶岩可能来源于上地壳源区。由此,茶卡北山地区伟晶岩脉可能来源于上地壳源区,形成于同碰撞构造环境。     

内蒙花山405铀矿微量元素地球化学特征及地质意义分析

内蒙古花山405矿点的微量和稀土元素能为铀矿勘查提供地球化学标志。通过对该地区矿化岩石和围岩分别采样,共对30个微量元素和14个稀土元素进行了对比分析,总结了该地区微量元素和稀土元素的地球化学特征。研究表明,该山群富集W、Re、Ba、Th、U、Pb等元素,而Li、Be、V、Ni、Cu、Rb、Zr、Nb、Mo、In、Cs、Tl、Bi等元素亏损;微量元素在矿化岩石中含量较高,在围岩中相对贫化;此外,该地区稀土元素地球化学特征表现为轻稀土富集,重稀土亏损;Eu在铀矿化岩石中显示弱正异常,在围岩中显示弱负异常,Ce基本没有异常。     

Rare Earth Elements Geochemistry of Dongtian Gold Deposit in Western Guangdong

Yunkai uplifted area is one of the important metallogenic areas in Guangdong and Guangxi Provinces, in which many gold, silver, tungsten, tin, lead, zinc, molybdenum, and iron deposits were found. Dongtian gold deposit in the middle of Yunkai uplifted area, western Guangdong Province, is chosen as an example of those deposits. Comparative studies on the chondrite - normalized REE patterns and ∑REE, LREE/HREE, δEu, δCe, NLa/Yb, and NLa/Sm of auriferous quartz veins, altered gneiss-type goM ores, Caledonian gneissic biotite granite, and Late Yanshanian granite porphyry were made. The results indicate that the source of the metallogenic materials of the auriferous quartz veins and the altered gneiss-type gold ores are the same, and both of them come from the gneissic biotite granite. Metallogenic epoch of the deposit is estimated to be Caledonian period.     

Geochemistry of Rare Earth Elements in Aktishikan Gold Deposit,Xinjiang

The characteristics and the models of rare earth elements in the geological bodies and the hydrothermal water balancel with the adamellite were comprehensivealy studied in Aktishikan gold deposit,Nurt area of Altay,Xinjiang,And the behavior of rare earth elements during metasomatic alteration was discussed by using the isocon method of Grant,The results show that the rare earth elements are inert during metasomatic alteration,the hydrotheraml water has no relation to the magmatic water,and the gold material sources mainly stem from the wall rock.     

Geochemistry of Rare Earth Elements of Anqing Copper Deposit in Anhui Province

ＴｈｅＹｕｅｓｈａｎｒｅｇｉｏｎｉｓｎｅａｒｂｙＡｎｑｉｎｇ ,Ａｎｈｕｉｐｒｏｖｉｎｃｅ .ＩｔｉｓｇｅｏｔｅｃｔｏｎｉｃａｌｌｙｌｏｃａｔｅｄａｔｔｈｅｎｏｒｔｈｅｒｎｍａｒｇｉｎｏｆｔｈｅＹａｎｇｔｚｅＰａｒａｐｌａｔ ｆｏｒｍ ,ｃｏｎｓｉｓｔｅｎｔｗｉｔｈｔｈｅｍｉｄｄｌｅｐａｒｔｏｆｔｈｅＣｈａｎｇｊｉａｎｇｄｅｅｐｆｒａｃｔｕｒｅｚｏｎｅｏｆｔｈｅｌｏｗｅｒＹａｎｇｔｚｅＰｌａｔｆｏｒｍｄｅｐｒｅｓｓｉｏｎ(Ｆｉｇ .1 ) .Ｔｈｅｄｅ ｐｏｓｉｔｓｏｆｓｋａｒｎｔｙｐｅａｒｅｔｈｅｆｏｒｅｍｏ…     

电感耦合等离子体质谱法测定地质样品中的稀土元素

以“HF-HNO3-H2SO4+王水”体系消解样品,国家一级标准物质替代待测元素标准溶液制备标准工作曲线,采用电感耦合等离子体质谱仪（ICP-MS）测定地质样品中的稀土元素。试验结果表明,该方法的准确度、精密度和检出限均符合规范要求,在实际应用中大大降低了基体效应带来的干扰,消除了配置标准工作曲线引进的误差,具有结果准确、易操作等优点,适用于批量测定地质样品中的稀土元素。     

Geochemistry of Rare Earth Elements in Lamprophyres in Laowangzhai Gold Orefield, Yunnan Province

The super-large Laowangzhai gold ore deposit is situated in the northern Ailaoshan tectonic zone I Yunnan Province 9 and was foundat the end of 1980s. Lamprophyres are widelyspread over the orefield. The available datashow that the lamprophyres are tijmporally andspatially related to gold mineralization. In theorefield, lamprophyric dykes occur mainly along the main Northwest-Solltheast--strikingfaults and their subsidiary fractures and intruded into all the strata and magmatic rocks.Their …     

Biosorption of Rare Earth Elements

Abstract

By using X-ray microanalysis, the mechanism of sorption of rare earth elements (REE) and their localization in cells of Candida utilis were found to depend on the metal ion speciation in solution, the permeability of the cytoplasmic membrane (CPM), and elemental composition of cells. Sorption capacity of the yeast cells increased with the increase in the pH of solution, which is connected with the extent of metal hydrolysis. Cells with native permeability of CPM did not sorb either scandium at pH values below 4.5 or lanthanum and samarium at pH values below 5.0. Such cells accumulate rare earth elements on surface structures. Only the cells with impaired CPM could sorb REE from the acid solutions. In this case, REE were accumulated inside the cells due to the interaction with phosphorus-containing compounds; the amount of sorbed REE depended on the content of phosphorus in the yeast cells. The yeast cells were shown to have extremely high affinity to scandium which thus can be selectively sorbed from solutions containing other REE, iron, and aluminum.     

Geochemistry of Rare Earth Elements in Hydrothermal Ore Deposit in Heishan Area, Shaanxi Province

ＭａｎｙｈｙｄｒｏｔｈｅｒｍａｌｏｒｅｄｅｐｏｓｉｔｓｗｅｒｅｆｏｕｎｄｉｎＨｅｉｓｈａｎａｒｅａ,ｓｏｕｔｈｅｒｎｍａｒｇｉｎｏｆｔｈｅＸｉａｏｑｉｎｌｉｎｇｇｏｌｄｏｒｅｒｅｇｉｏｎ．Ｔｈｉｓｐａｐｅｒｄｉｓｃｕｓｅｓｔｈｅｃｈａｒａｃｔｅｒｉ...     

Geochemistry of Rare Earth Elements in Xikeng Ag-Pb-Zn Ore Deposit, South Anhui, China

ＴｈｅＳｏｕｔｈＡｎｈｕｉｉｓｌｏｃａｔｅｄｉｎｔｈｅｌｏｗｅｒＹａｎｇｔｚｅＲｉｖｅｒｐｌａｔｆｏｒｍａｌｆｏｌｄｂｅｌｔｏｆｔｈｅＹａｎｇｔｚｅｐａｒａｐｌａｔｆｏｒｍｉｎＪｉａｎｇｎａｎ .Ａｌａｒｇｅ ｓｃａｌｅｔｒａｎｓｇｒｅｓｓｉｏｎｓｉｎｃｅｔｈｅｌａｔｅＳｉｎｉａｎａｆｔｅｒｅａｒｌｙＳｉｎｉａｎＮａｎｔｕｏｇｌａｃｉａｌｐｅｒｉｏｄｌｅｄａｂｌａｃｋｓｈａｌｅｆｏｒｍａｔｉｏｎｃｏｎｓｉｓｔｉｎｇｏｆｂｌａｃｋｃａｒｂｏｎａ ｃｅｏｕｓｓｈａｌｅ ,ｃａｒｂｏｎａｃｅｏｕｓｍｕｄｓｔ…     

Separation and Enrichment of Rare Earth Elements in Phosphorite in Xinhua, Zhijin, Guizhou

The phosphorite ores-deposits rich in rare earth elements(REE) in Zhijin, Xinhua, Guizhuo occurs in the early Cambrian Meishucun and at the bottom part of Qiongzhusi stage (the upper layer of phosphorites), belonging to Yangzi stratum section. The living creature scraps was proved existent in dolomitic-phosphorites by experiments, The REE could be extracted to provide the worthy data for the further using. Adopting the HNO3 to extract REE, through the ion exchange method, the REE recovery rate could be reached 85.44%, having certain reference value.     

Determination of Trace Rare Earth Elements in Biological Samples by ICP-AES with Tungsten-spiral Electrothermal Vaporization Sampling

A method for determination of trace rare earth elements in biological sample by ICP-AES withtungsten-spiral electrothermal vaporization(TETV-ICP-AES)sampling has been developed in this work.Several influencing factors including desolvation and vaporization parameters,carrier gas flow rate and ma-trix effect were investigated in detail.Under optimal experimental conditions,the detection limits for La,Nd,Gd,Dy,Ho,Yb,Lu and Y were obtained in the range of 10~(-9)～10~(-11) g,and they are comparable to and,inmost instances,better than those for the GFAAS and conventional pneumatic nebulisation-ICP-AES.Theprecision(RSD)obtained for this method is less than 6%.