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- W2371084375 abstract "The volcanic rocks of Manitu Formation in the Tuquan Basin of Central Daxinganling region comprise a series of acid, acid-intermediate and intermediate rocks, namely, trachyandesite, andesite, dacite and rhyolite, with age of138.0±3.0 Ma by Laser40Ar/39Ar dating, identical to the early Early-Cretaceous. The geochemical characteristics of these rocks display a typical high-K calc-alkaline series with an average ΣREE of 117×10-6, 136×10-6and 131×10-6, average(La/Yb)N of 6.38, 7.62 and 6.27, and average δEu of 0.88, 0.85 and 0.40 for the intermediate, acid-intermediate and acid rocks, respectively. All the rocks share the similar geochemical characteristics of significant enrichment in Rb, Ba, Th, U,K(LILE)and LREE, depletion in Nb, Ta, P and Ti(HSFE), indicating a crustal magmatic genesis. The chorology,geochemistry, magmatic genesis and tectonic background of the Manitu Formation largely distributed in Daxinganling have a remarkable variation by different areas on the ground of a great number of available information. Therefore, the volcanic rocks of the Manitu Formation in this study are most likely to be derived from partial melting of a thickened lower crust as a result of collision setting of Mongol-Okhotsk orogenic belt." @default.
- W2371084375 created "2016-06-24" @default.
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- W2371084375 date "2013-01-01" @default.
- W2371084375 modified "2023-09-23" @default.
- W2371084375 title "GEOCHEMICAL CHARACTERISTICS AND LASER ~(40)Ar/~(39)Ar DATING OF THE VOLCANICS FROM THE MANITU FORMATION OF TUQUAN BASIN IN CENTRAL DAXINGANLING" @default.
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