A Study on the Formation of the Mt. Emei Faulty Block
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Abstract:
The Mt. Emei is a faulty block mountain, it is famous for the great and beautiful, but how it was formed? There is no systematically studied. Based on the engineering mapping of 1:25000 scale, the paper systematically studies the geological structure feature and structural superimposed folds, some research results can be concluded: The uplift of Mt. Emei began in the end of the Eocene, i.e. , during the Himalayan movement of the first epoch, under the pressure of NWW-NEE regional geo-stress, the NNE strike folds and NE faults have been formed, it uplifted and became the erosion area. Since the Neocene, under the nearly EW regional pressure geo-stress field, the blunt cone Daeshan faulty block was wedging eastward, the early NNE strike strata of the block frontier bent anti-clockwise, the strike of the strata in the frontier area (Longmendong–Baoguosi ) became SN, the strata dip westward; the Jianjianshi anticline bending eastward in north boundary of the block, forming NW strike tectonic superposition, while the outer area far from the block frontier, the attitudes of the strata are normal; The Emeishan fault slips in east boundary, Since the Quaternary, The intensive intermittent uplift，10 uplifting events happened and the relief gradually formed. Since the Cenozoic, uplifting distance of the Emeishan fault is about 6000m, the strike slip distance is 4000m.
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