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石英砂表面结构特征组合能指示沉积物的搬运历史和沉积环境。利用电镜扫描方法分析了南极法尔兹半岛上海蚀成因的古海蚀龛沉积物中的石英砂表面结构特征组合。结果表明 ,在所有的石英砂表面上均表现出冰川和水流共同作用的结构特征组合 ,龛中沉积物是冰水沉积环境下的产物 ,在沉积过程中 ,沉积物先经过较薄的冰川搬运 ,后经历了不同能量的流水改造作用 ,但冰川和流水的搬运距离有限。上述研究结果表明 ,南极法尔兹半岛上的冰盖解体并退出长城站区的时间应早于 46 0 0 a BP
The combination of surface texture features of quartz sand can indicate the sediment transport history and sedimentary environment. Electron microscopy scanning method was used to analyze the surface texture of quartz sand in the sediments of the ancient sea eclogites in Shanghai Faerz Peninsula, Shanghai. The results show that the combination of glacier and water flow shows structural features on all the quartz sand surface. The sediments in the niche are the products of ice-water deposition. During sedimentation, the sediments are transported through thinner glaciers After experiencing the transformation of water with different energy, glaciers and running water have a limited transportation distance. The results of the above study show that the ice sheet on the Farz Alps in the Antarctic should disintegrate and exit the Great Wall Station Area earlier than 46 0 0 a BP