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…     

Rare Earths of Two Types Granites in Sawuer Region, Xinjiang

The geochemical characteristics of rare earth elements of A type and Ⅰ type granites were studied in the Sawuer region, Xinjiang. The characteristics of two types granites are different obviously,because the A type and Ⅰ type granites formed at different stage of the post-collisional period. The Sentasi intrusion and Wokensala intrusion are the Ⅰ type granites formed at the late of post-collisional period, and there is extrusion translating to extension stress. The characteristics of rare earth elements show that the fractional crystallization of the Ⅰ type granites is indistinct, and the sources of the Ⅰ type granites come from the mantle. The Kuoyitasi intrusion and Qiaqihai intrusion are the A type granites formed at the end of post-collisional period, and there is extension stress. The characteristics of rare earth elements show that the fractional crystallization of the A type granites is distinct. The sources of the A type granites come from the mantle but interfused by the crust.     

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

ＴｈｅＳｏｕｔｈＡｎｈｕｉｉｓｌｏｃａｔｅｄｉｎｔｈｅｌｏｗｅｒＹａｎｇｔｚｅＲｉｖｅｒｐｌａｔｆｏｒｍａｌｆｏｌｄｂｅｌｔｏｆｔｈｅＹａｎｇｔｚｅｐａｒａｐｌａｔｆｏｒｍｉｎＪｉａｎｇｎａｎ .Ａｌａｒｇｅ ｓｃａｌｅｔｒａｎｓｇｒｅｓｓｉｏｎｓｉｎｃｅｔｈｅｌａｔｅＳｉｎｉａｎａｆｔｅｒｅａｒｌｙＳｉｎｉａｎＮａｎｔｕｏｇｌａｃｉａｌｐｅｒｉｏｄｌｅｄａｂｌａｃｋｓｈａｌｅｆｏｒｍａｔｉｏｎｃｏｎｓｉｓｔｉｎｇｏｆｂｌａｃｋｃａｒｂｏｎａ ｃｅｏｕｓｓｈａｌｅ ,ｃａｒｂｏｎａｃｅｏｕｓｍｕｄｓｔ…     

Mechanism of Formation of Premian Volcanic Rocks in Sawu′er Region, Xinjiang, China: Constraints from Rare Earth Elements

Sawu′er region is located in Ji munai County ofAltai regionin Xinjiang Province ,China ,whichis sit-uatedin the northern margin of the Kazakhstan-Jung-gar plate[1 ~3].The large fault in Sawu′er developedinthe central researchregion ,which shapedthe concavelandformin geomorphology withlong and narrowgullysand yakou etc .The western part of the fault developedsecondary faults . The intrusive rocks in the researchregion have developed with an outcrop area of about257 km2.The various types o…     

Study on Mechanism of Formation of Volcanic Rock in North Altay by Using Rare Earths

The characteristics of rare earth elements in the Devonian and Carboniferous volcanic rocks were studied in the north Altay. And the mechanism of formation of volcanic rocks were discussed by using the rare earth elements. The correlativity of rare earth elements and major elements shows that the fractional crystallization is undistinguishable during the formation of Devonian and Carboniferous volcanic rocks, and the mechanism of formation of volcanic rocks may be the partialmelting. The further study of the relationship of manifold rare earth elements shows that the mechanism of formation of Devonian and Carboniferous volcanic rocks in the north Altay is the partial melting. And the result also shows that the rare earth elements in the Devonian and Carboniferous volcanic rocks inherited the characteristics of those in its source materiels.     

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.     

Rare Earths of Magmatic Rocks in Yanshanian Stage in Adjacent Region of Anhui and Jiangxi Provinces, Jiangnan Uplift

The geochemical characteristics of rare earth elements of magmatic rocks of Yanshanian stage were studied in the south of Anhui Province and northeast of Jiangxi Province, Jiangnan Uplift. The result shows that the magnmtic rocks of Yanshanian stage in the south of Anhui Province are the typical crust source type and those in the northeast of Jiangxi Province have the characteristics of mantle source type. So the polymetal deposits having relation to the magmatic rocks of Yanshanian stage in the northeast of Jiangxi Province were developed better than those in the south of Anhui Province. The research results of the rare earth elements are confirmed by the studies of geophysics, tectonic setting and stable isotope at the same time. It also indicates that the rare earth elements are the effective approach to tracing the material sources of magmatic rocks.     

Mechanism of Formation of Premian Volcanic Rocks in Sawu＇er Region, Xinjiang, China： Constraints from Rare Earth Elements

A large quantity of Premian volcanic rocks formed in Sawu＇er region of Xinjiang, China. Based on the analysis of the rare earth elements＇ （REEs） geochemical characteristics of the volcanic rocks, the correlativity of REE and major elements, and diagrams of covariant relation of REE, combined with the research results of the regional geological setting, petrology, and petrochemistry characteristics, it is inferred that the mechanism of the formation of Premian basic and intermediate volcanic rocks is mainly attributed to equilibrium partial melting, and the magmatic fractional crystallization is not significant, whereas the rock-forming processes of medium-acidic volcanic rocks is influenced by both partial melting and fractional crystallization. The REE geochemical research provided important evidence for the mechanism of magmatism of the Premian post-collision stage and the geodynamical evolution process.     

Geochemistry of Rare Earth Elements of Mesozoic-Cenozoic Sandstones in North Margin of Dabie Mountains and Adjacent Areas： Constraints to Source Rocks

Mesozoic CenozoicdetritalrocksdevelopinthenorthmarginoftheDabieMountains ,andthestudyoftheirsourcerockshasattractedcloseattention .Sand stonecomponentsarecommonlyappliedinthestudyofstructuresettingofsourcerocks ,butitisdifficulttoconstructcorrespondingrelationsbetweensedimentanditssourcerocks[1～ 4 ] .Thepaper ,forthefirsttime ,studiesindetailREEgeochemistryofMesozoic CenozoicsandstonesinthenorthmarginoftheDabieMountainsandadjacentareas ,characterizesREEofeachstratigraphicunit ,suggeststh…