The characteristics and tectonic significance of Permian volcanic rocks in habudala Mountain of alashan right banner, Inner Mongolia

摘要

The Permian volcanic rocks of habudala Mountain in the east-central Inner Mongolia, are a set of radicle-acidity volcanic rocks. The volcanic rocks characteristics of occurrence, petrology, petrochemistry and geochemistry characteristics of metamorphic volcanic rocks are studied in the paper. The research results indicate the volcanic rocks are of the calc-alkaline volcanic rocks characteristics of active continental margins. The model of rare earth element (REE) of the basic volcanic rocks shows that their rock-forming elements came from upper mantle or originated from an old earth crust. Based on the research of rock-forming environment and the regional geological researches, The volcanic rocks in this region belong to a set of the central intraplate eruption of volcanic type, and probably are the outcome of intraplate hot spot or mantle plume.