论文部分内容阅读
河北平原南部曲周地区一河间洼地剖面中 2 4 0cm ,1 6 0cm和 80cm深度处的AMS1 4C测年结果分别为1 0 2 1 0± 80aB .P .,82 70± 70aB .P .和 6 5 0 0± 6 0aB .P .。由这 3个测年数据和代用指标数据相结合推测的曲周地区全新世古环境状况及其变化与其他研究者在其他地区 ,尤为河北平原其他地区所获的结果是相同或相似的 ,并且在时间上是吻合的。由这 3个数据推导的沉积物的埋深、厚度、堆积速率以及岩性等特征大都是这一剖面所处沉积环境和构造活动部位的反映 ,与前人有关河间洼地沉积的基本特征及其影响因素的阐述是相符的。充分认识河间洼地沉积物的特征 ,尤为其与河道沉积等的差别 ,对于更全面、深入地了解河流系统可能是有益的
The results of AMS1 4C dating at depths of 240 cm, 160 cm and 80 cm in the section of a river valley in the Quzhou area in the southern part of the Hebei Plain are respectively 10 2 1 0 ± 80 aB .P., 82 70 ± 70 aB .P. And 6 5 0 0 ± 6 0 aB .P .. The results of the Holocene Paleoenvironment and its changes in Quzhou area, which are deduced from these 3 dating data and proxy data, are the same or similar to the results obtained by other researchers in other areas, especially in other parts of Hebei Plain. Time is consistent. The characteristics of sediment depth, thickness, accumulation rate and lithology deduced from the three data are mostly the reflection of sedimentary environment and tectonic activity in this section. The sedimentary characteristics of the sediments in the Hejian Depression, The explanation of its influencing factors is consistent. Fully understanding the characteristics of sediments in the Hejian depression, especially the difference with river sediments, may be beneficial for a more comprehensive and in-depth understanding of river systems