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磁组构作为恢复古季风风向的一种手段,近来被广泛地应用到中国黄土沉积中.通过测量青藏高原东北缘临夏盆地龙担剖面早第四纪黄土-古土壤序列磁组构的各项参数,初步得出龙担剖面磁组构特征为正常沉积,磁化率各向异性主要由磁面理控制,磁化率椭球体表现为压扁状.龙担剖面早第四纪磁化率各向异性长轴方向的偏角较好地指示了古冬季风的方向,为NW—SE向.
As a measure to restore the ancient monsoon wind direction, the magnetic structure has been widely applied to the loess sediments in China recently.Through measuring the magnetic composition of the Early Quaternary loess-paleosol sequence in the Longdan section of the Linxia basin in the northeastern Qinghai-Tibet Plateau, Parameter, the magnetic composition of the Longdan section is normalized and the magnetic susceptibility anisotropy is mainly controlled by magnetic texture, and the susceptibility ellipsoid is flattened. The Longdan section is characterized by the early Quaternary magnetic anisotropy The declination in the long axis direction better indicates the direction of the ancient winter monsoon, NW-SE direction.