Geochemical Characteristics of Rare Earth Elements in Sewage Discharge Channels of Tianjin

The geochemical features of rare earth elements (REEs) in the North and South sewage discharge channels of Tianjin were studied. The results show that concentrations of dissolved REEs in water of the sewage discharge channels are very low, while concentrations of Eu and heavy REEs are higher than those in natural rivers. Concentrations of REEs in unfiltered water are high and they mainly resided on suspended matter. Distribution patterns of the dissolved and suspended light REEs vary reversely with the atomic number. Concentrations of REEs in the sediments and suspended matter are lower than those in natural rivers, and concentrations of REEs in the suspended matter are much lower than those in the sediments. Distrib.ution patterns of REEs in sediments and suspended matter were similar with light REE enrichment and positive Eu-anomaly. This distribution pattern is different from those of natural rivers. The differences may cause by the large amount of organic pollutants in sewage.     

Concentrations and Distribution Patterns of Rare Earth Elements in Water Body from Intertidal Flat of Tianjin and Influence of Various Factors

Concentrations and distribution patterns of rare earth elements(REEs)in the intertidal flat of Tianjin were studied using P507 resin and ICP-MS analytical technology. The results show that average concentrations of REEs in the filtered(dissolved REEs), unfiltered and interstitial water are 0.461 μg·L-1, 4.98 μg·L-1 and 0.845 μg·L-1, respectively. Their distribution patterns are similar to those in inland natural rivers, but quite different from those in oceans. The average concentrations of REEs in sediments and suspended matters are 161.2 mg·L-1 and 168.1 mg·L-1, respectively, which are much lower than those in sediments of natural rivers but higher than those in sediments of the continental shelf of East China Sea. It is suggested that REEs in sediments and suspended matters of intertidal flat can have mainly originated from terrestrial soils and thus their transportation and transformation processes are similar with those in rivers, and different from those in continental shelves. Pollutants discharged into the Bohai Bay do·not cause significant effect on REEs in the intertidal flat of Tianjin yet.     

Geochemical Characteristics and Behaviors of Rare Earth Elements in Process of Vertisol Development

Vertisol developed on argillaceous rocks has its special pedogenic processes and properties, and formed some secondary no,Jules. In study area, contents of rare earth elements (REE) are significantly different in different sedimentary rocks due to varied contents of clay fraction and clay mineral composition, etc. Under the dry and hot climate, REEs were less differentiated than their parent sedimentary rocks. However, REEs in secondary nodules formed in pedogenic process display their specific behaviors. They are more concentrated in iron concretions, the content of heavy REEs increases relatively, and positive Ce-anomaly appeares. But, negative Ceanomaly was found in calcium concretions, while normal Cecontent in parent recks and vertisol.     

Geochemical Implication of Rare Earth Elements in Process of Soil Development

Ｗｉｔｈｓｉｍｉｌａｒｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓ ,ｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔｓａｒｅａｌｗａｙｓｐａｒａｇｅｎｅｔｉｃｉｎｎａｔｕ ｒａｌｅｎｖｉｒｏｎｍｅｎｔ.Ｈｏｗｅｖｅｒ ,ＲＥＥｍａｙｂｅｆｒａｃ ｔｉｏｎａｔｅｄｉｎｖａｒｉｏｕｓｇｅｏｃｈｅｍｉｃａｌｃｏｎｄｉｔｉｏｎｓｏｗ ｉｎｇｔｏｔｈｅｍｉｎｕｔｅｄｉｓｃｒｅｐａｎｃｙａｍｏｎｇａｔｏｍｉｃｓｔｒｕｃｔｕｒｅｓａｎｄｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓｏｆＲＥＥ .Ｆｕｒｔｈｅｒｍｏｒｅ ,ｄｉｓｔｒｉｂｕｔｉｏｎｓｔａｔ…     

Correlation Studies of Rare Earth Elements in Syntectonic Intrusions of Strike-Slip Stage along Southern Segment of Tan-Lu Fault Zone

Intrusions in the Zhangbaling uplift zone and the eastern margin of the Dabie orogenic belt belong to the svntectonic intrusions developed during the strike-slip stage in the southern segment of the Tan-Lu fault zone. However, characteristics of rare earth elements show that intrusions in the Zhangbaling uplift zone have the characteristics of mantle source type and those in the eastern margin of Dable belt are the typical crust source type. Therefore, Au-deposits related to the intrusions in the Zhangbaling uplift zone are developed better than those in the eastern margin of the Dabiesban. The research results of the rare earth elements coincide with the studies of geophysics, tectonic setting and stable is otope. It isfurther indicated that the rare earth elements offer effective approach to tracing the material sources of magmatic rocks.     

Geochemical Characteristics of Rare Earth Elements in Gejiu Tin Polymetallic Deposits, Yunnan Province, China

In order to get a better understanding of metallogeny, the geochemical characteristics of REE and trace element for Gejiu tin polymetallic deposits were studied by comparing concentrations of REE and trace elements in different type ores and rocks, including skarn-type ore, bedded-type ore, vein-type ore, altered granite, country rocks. Results of this study indicated that the metallogenic matters for different type ores in the study area might be derived from the same origin source, which may be mainly related to granitic activities. Furthermore, there are some differences in concentrations of REE in different ores due to their different depositiona! mechanism during that time. LREE concentrations were enriched relatively in the vein-type ores and the bedded-type ores with relatively low total REE concentrations, whereas total REE concentrations were higher in the skarn-type ores with LREE and HREE concentrations in wide variation ranges.     

Geochemical Characteristics of Rare Earth Elements of Guidong Granitic Complex and Their Relationship with Uranium Mineralization

Geochemical Characteristics of Rare Earth Elements of Guidong Granitic Complex and Their Relationship with Uranium Mineralization     

Geochemical Study of Rare Earth Elements on Four Attapulgite Clay Deposits in Jiangsu and Anhui Provinces, China

This paper discussed in detail about the BEE component and the characteristics of the different kinds of attapulgite clay ores as well as basalts, weathered basalts in four localities of attapulgite clay deposits of Jiangsu and Anhui Provinces of China. It is concluded that the half-weathered basalts have not distinct REE fractionation and strong weathered basalts have HREE loss in the process of the basalts weathered to form smectite group minerals. And the latefitic montmorillonite clays that formed from the basalts weathering have a distinct Ce positive anomaly, a little MREE loss and LREE and HREE renew enrichment. That reflects the particular oxidation condition in the Earth‘‘ s surface and the adsorption of the colloid solution of the lake water in the basin of the continent in the time of the clays formed. The attapulgite clays produced by the reaction between basahs with lake water in the original place of the basin have same REE characteristics as that of the basalts and the weathered basahs. This shows that REE does not transfer heavily in the progressive chemical weathering process. The sedimentary attapulgite clays have also a similar REE component and characteristic parameters to the basalts and the weathered basalts, and have a distinct Eu negative anomaly and a big value of LREE/HREE, which shows that the sedimentary clay came from the weathered basalts, and BEE partitioning patterns characters of the clays are controlled by the residual material of the weathered basalts.     

稀土元素的特殊性质及其应用

本文从稀土元素微观结构角度，揭示了稀土元素的某些特殊性质，并指出这种特性与应用机理有必然的联系。从而启迪稀土使用者，掌握和了解稀土的基本特性，才能自由地驾驭稀土的应用。     

云南麻栗坡新厂冲-西畴兴街一带水系沉积物地球化学特征

笔者通过对云南麻栗坡新厂冲-西畴兴街一带水系沉积物地球化学特征分析,区内元素主要有6个元素组合:Co-Ni-Mn-Ti-Mo元素组合、Sb元素、Ba元素、Ag-Cu-Sn-As-W元素组合、Pb-Zn元素组合、Au元素;通过圈定地球化学异常,综合筛选出综合异常33处,其中甲类异常3处,乙类异常6处,为该地区下一步找矿工作提供参考,同时探讨水系沉积物测量方法在该地区的应用效果。下一步可利用地质物化探等综合手段,对区内的矿产资源潜力进行评价。     

Effect of Rare Earths on Composition and Activities of Rare Earth Elements Binding Glycoprotein in Tea

Ｔｅａｐｏｌｙｓａｃｃｈｒｉｄｅｃｏｍｐｌｅｘ ,ｏｎｅｏｆｔｈｅｂａｓｉｃｍａｃｒｏｍｏｌｅｃｕｌｅｓｉｎｔｅａ ,ｈａｓｍａｎｙｐｈａｒ ｍａｃｅｕｔｉｃａｌｅｆｆｅｃｔｓａｎｄｉｓｅａｓｙｔｏｄｉｓｓｏｌｖｅｉｎｔｅａｉｎｆｕｓｉｏｎ[1] .Ｚｈｏｎｇｅｔａｌ .[2 ] ｄｉｓｃｏｖｅｒｅｄｔｈａｔｔｈｅｒｅｉｓａＲＥｂｉｎｄｉｎｇｐｏｌｙｓａｃｃｈａｒｉｄｅｉｎｌｅａｖｅｓｏｆｔｅａｐｌａｎｔ (ＣａｍｅｌｌｉａＳｉｎｅｎｓｉｓＬＯ .Ｋｕｎｔｚｅ) .Ｉｎｔｈｉｓｐａｐｅｒ ,ｔｈｅｓｔｕｄｙｏｎｔｈｅｃｏ…     

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.     

Geochemical Behaviour of Rare Earth Elements in the Erdaogou Gold Deposit

ＧｅｏｃｈｅｍｉｃａｌＢｅｈａｖｉｏｕｒｏｆＲａｒｅＥａｒｔｈＥｌｅｍｅｎｔｓｉｎｔｈｅＥｒｄａｏｇｏｕＧｏｌｄＤｅｐｏｓｉｔＰａｎｇＪｉａｎｇｌｉ（庞奖励）（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙ，ＳｈａｎｘｉＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，...     

稀土锗钨钼杂多配合物的合成及表征

合成了十二种稀土锗钨钼酸根多元杂多配合物。利用元素化学分析和ICP相结合方法、IR等手段对配合物进行了初步表征。     

Study on Adsorption of Rare Earth Elements by Kaolinite

Rareearthelements (REEs)werewidelyappliedtotracingthesourcesofmaterialsandtostudyingtheirevolutionprocessesinmanyfieldsofearthscienceinconsiderationoftheirsimilarityandsystematicdiffer enceinchemicalproperties .Furthermore ,lanthanidesarebothimportantprod…     

Effect of Rare Earth Elements on Quantity Growth of Crops

Ｒａｒｅｅａｒｔｈ (ＲＥ)ｍｉｃｒｏ ｆｅｒｔｉｌｉｚｅｒｓｈａｖｅｂｅｅｎｕｓｅｄｉｎａｇｒｉｃｕｌｔｕｒｅｐｒｏｄｕｃｔｉｏｎｉｎＣｈｉｎａｓｉｎｃｅ 1 970ｓ ,ａｎｄｔｈｅｓｅｍｉｃｒｏ ｆｅｒｔｉｌｉｚｅｒｓａｒｅｓａｌｔｓｏｆｍｉｘｅｄＲＥｓ ,ｗｈｉｃｈｍａｉｎｌｙｉｎｃｌｕｄｅＬａ ,Ｃｅ ,ＰｒａｎｄＮｄ[1,2 ] .ＰｒｅｖｉｏｕｓｓｔｕｄｉｅｓｓｈｏｗｔｈａｔｔｈｅＲＥｉｎｓｕｒｆａｃｅｓｏｉｌａｌｍｏｓｔｄｏｅｓｎｏｔｍｉｇｒａｔｄｏｗｎｗａｒｄａｔａｌｌａｎｄｔｈｕｓｂｅａｃｃｕｍｕｌａ…     

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

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

Effect of Rare Earth Elements on Powder Boro-Carbo-Nitriding at Low Temperature

Ｂｏｒｉｄｉｎｇｃａｎｓｉｇｎｉｆｉｃａｎｔｌｙｉｍｐｒｏｖｅｓｕｒｆａｃｅｐｒｏｐｅｒｔｉｅｓｏｆｓｔｅｅｌｓ,ａｎｄｔｈｕｓｉｓａｐｒｏｓｐｅｒｏｕｓｓｕｒｆａｃｅｓｔｒｅｎｇｔｈｅｎｉｎｇｐｒｏｃｅｓｓｗｈｉｃｈｈａｓａｌ ｒｅａｄｙｂｅｅｎｕｓｅｄｉｎｔｒｅａｔｉｎｇｓｏｍｅｄｉｅｓａｎｄｃｕｔ ｔｉｎｇｔｏｏｌｓ[1 ] .Ｈｏｗｅｖｅｒ,ｔｈｅｒｅｅｘｉｓｔｓｏｍｅｐｒｏｂ ｌｅｍｓｉｎｂｏｒｉｄｉｎｇ .Ｆｉｒｓｔｌｙ ,ｂｏｒｉｄｉｎｇｉｓｇｅｎｅｒａｌｌｙｐｅｒｆｏｒｍｅｄａｔｔｅｍｐｅｒａ…     

Effect of Rare Earth Elements on Kinetics of Salt Bath Vanadizing

Effect of Rare Earth Elements on Kinetics of Salt Bath Vanadizing     

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.