Geochemical Characteristics of Upper Triassic Hagong Formation Volcanic Rocks in Bendu Village,Bendu Township,Derong County
The volcanic rocks in the Upper Triassic Haong Formation in Bendu Village,Bendu Township,Derong County are mainly composed of basalt,basaltic hornfels and basalt-Andesitic volcanic breccia.The analysis of petrological and geochemical characteristics of volcanic rocks shows that volcanic rocks belong to alkaline series.The trace elements showed the relative enriched of large ion lithophile elements and the relatively depleted of high field strength elements.The total amount of rare earth is high,the light rare earth is enriched,and the heavy rare earth is depleted,with positive Eu anomaly.Comprehensive research shows that the volcanic rocks of the Hagong Formation were formed in the intra-continental plate tension tectonic environment.
Hagong FormationZhongza-zhongdian blockintraplate tension tectonic environmentDerong Country
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