Characteristics and mechanism of Yanluo giant deposit in Wenchuan County
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Abstract:
The basic characteristics, formation, and evolution process of the large-scale accumulations developed in Yanluo Village , Yanmen Tow nship, Wenchuan County are studied based on detail field investig ations. The results show that: Yanluo depos it is a complex origin deposit that made up of residual and slope deposit, colluvium, loess like and landslide deposit , and it can be divided into two zones and six sub-zones; the failure modes of the evolution process of Yanluo depo sit are " bend-crack" which is simulated by UDEC so ftware; The 4 evolution phases of Yanluo deposit may be summarized as loess accumulation stage in early Pleistocene, unloading and deformation stage in middle-late Pleistocene, landslide formation stage, deposit reactivated and defo rmation stage in Holocene, respectively
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