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昆仑山北坡鸭子泉河流阶地系列是晚更新世以来青藏高原阶段性隆升的地貌标志.阶地地貌及沉积学研究证明其为构造成因阶地,是青藏高原北部构造隆升过程中河流阶段性下切作用形成的.通过粗颗粒石英(90~125μm)的光释光单片再生法(SAR)及14C测年研究,初步确定鸭子泉河各级阶地的形成年代分别约为57.5,12.8和6.5kaBP.三级阶地特征及年代学研究揭示昆仑山北坡在全新世初期河流下切速率明显提高,从12.8kaBP开始下切速率平均值由0.43±0.08mm/a突变为1.59±0.69mm/a,显然,全新世之初昆仑山开始较为强烈地隆升.青藏高原北部边界的阿尔金断裂构造运动也存在本次变化,但其隆升速率明显大于昆仑山,这种差异表明青藏高原北部边缘的地表隆升和地壳增厚有大于其内部的趋势.
Kunlun Mountains on the northern slope of the ducks Izumi river terrace series since the late Pleistocene Qinghai-Tibet Plateau uplift of the landform signs.Platform landforms and sediment studies have proved that it is tectonic cavernous, is the northern part of the Qinghai-Tibet Plateau during the uplift of the river step undercut (SAR) and 14C dating of coarse grain quartz (90 ~ 125μm), it was initially determined that the formation ages of the various stages of the Quanhe River were about 57.5, 12.8 and 6.5 kaBP .Three terrace characteristics and geochronology study revealed that the northern Kunlun Mountains in the early Holocene lower shear rate significantly increased from 12.8kaBP average shear rate from 0.43 ± 0.08mm / a mutation to 1.59 ± 0.69mm / a, apparently, The Kunlun Mountains started to rise strongly at the beginning of the Holocene.The tectonic movement of the Altyn Tagh fault at the northern border of the Qinghai-Tibet Plateau also shows this change, but its uplift rate is obviously higher than that of the Kunlun Mountains, indicating that the surface topography of the northern margin of the Tibetan Plateau L and crustal thickening has more than its internal trend.