We found 12 fault zones in the entire core profile, with at least 10, including the Yingxiu-Beichuan fault zone, with a multiple cores structure and minimum width of ~ 100 m. The co-seismic slip plane of the Wenchuan earthquake at depth (corresponding to the Yingxiu-Beichuan fault zone at the outcrop), as well as its PSZ, was expected to be located at the bottom of the fault zone (at 759 m-depth). Instead, it was found at ~590 m-depth with 1 cm-wide fresh fault gouge, as determined by logging data such as temperature, natural gamma ray, p-wave velocity and resistivity, combined with the fresh appearance, magnetic susceptibility, and microstructure of the gouge. The Wenchuan earthquake slip plane has a dip angle of ~ 65¡ã, showing the high-angle thrust feature. The distribution of fault gouge with several meters thick, the location of the Wenchuan earthquake's PSZ and the thickness of fresh gouge all imply a correlation between the width of the fault zone and the number of seismic events.