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- W2352672786 abstract "The main element,rare earth element(REE) and trace element in bojite in Shuguang village and the dating method by zircon LA-ICP-MS U-Pb were analyzed.The results show that in bojite,the average mass fraction of SiO 2 is 41.38%,with obvious characteristics of depleted silicon.And alkali is poor but Al is rich.And K,Ti and P are lower.The average value of Mg# is 40.99,which is lower than primary magma range(68-75).This shows that the rock has experienced a certain degree of differentiation and evolution.It suggests the presence of weak cumulate effect of Plagioclase because the rare earth mode curve is gently inclined to right,and the degree of fractionation of heavy and light REE is low,and δ(Eu) is positive anomaly weakly.On the whole aspects,the large ion lithophile elements(LILE) including Rb,Sr and K in enrichment and the high strength elements(HFSE) including Nb and Zr in medium loss.The ratio of zircon w(Th)/w(U) is 0.66-1.48.And many of them have a clear growth oscillatory zoning,which indicates that they are magmatic zircon.By the dating result of(215±2.0) Ma,we speculat that the bojite in Shuguang village is the product of magma activity in Late Triassic,and is formed in the extensional tectonic environment after the collision of Jia Musi plots and Songnen mass if with the background of the subduction of the Pacific plate.Through the underplating,the mafic magma from the mantle showed contamination with crustal material in the rising process." @default.
- W2352672786 created "2016-06-24" @default.
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- W2352672786 date "2013-01-01" @default.
- W2352672786 modified "2023-09-23" @default.
- W2352672786 title "Petro-geochemistry,zircon U-Pb geochronology and tectonic significance of bojite in Shuguang village in Northeast of Lesser Xing'an Range" @default.
- W2352672786 hasPublicationYear "2013" @default.
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