青海喇家遗址史前灾难成因的探索与辨析

周强, 张玉柱

Exploration and analysis of the reasons for pre-historical catastrophes in the Lajia Ruins, Qinghai Province

Qiang ZHOU, Yuzhu ZHANG

表2 黄河积石峡乙巳日古堰塞湖沉积剖面底部和顶部沉积物地球化学元素含量对比

Tab. 4 Geochemical elements of the bottom part of the dammed lake deposits in comparison with that of the top part of the dammed lake deposits at the Yisiri site in the Jishixia Gorge on the upper Yellow River

样品位置 Fe2O3 (%) Al2O3 (%) MgO (%) K2O (%) TiO (%) MnO (%) Na2O (%) Cl(ppm) Br(ppm) S(ppm) 剖面顶部 6.61 5.60 1.19 1.31 0.34 0.07 59.35 49261.40 10.90 412.00 剖面底部 7.37 14.06 2.82 2.72 0.62 0.15 0.94 4024.40 7.20 254.90