青海省长宁遗址沉积物元素对晚全新世人类活动和气候变化的响应

RESPONSE OF SEDIMENT ELEMENTS TO HUMAN ACTIVITIES AND CLIMATIC VARIATION IN CHANGNING SITE,QINGHAI PROVINCE DURING LATE HOLOCENE

通过对青海省长宁遗址晚全新世沉积剖面OC、P、Ba、Mn、S、K2O、Pb、As、Al2O3、Fe2O3和Cu的化学成分分析及磁化率分析,研究了该时期沉积物元素含量对人类活动和气候变化的响应。结果表明,齐家文化时期(4300～3900aBP)至汉代(202BC—220AD)之间的气候恶化使沉积物中上述元素含量显著下降,齐家文化时期和汉代的人类活动也对沉积物元素含量产生了影响,不同方式的人类活动对沉积物元素含量的影响存在差异。

Based on the analysis of OC, P, Ba, Mn, S, K2O, Pb, As, Al2O3, Fe2O3, and Cu contents and magnetic susceptibility of sediment in Changning site, Qinghai Province, responses of the elemental contents to human activity and climate change during late Holocene have been discussed. The result indicated that climatic degeneration between Qijia cultural period （4 300～3 900 aBP）and Han Dynasty（202 BC～220 AD） made elemental contents in the sediment drop significantly, human activities in Qijia cultural period and Han Dynasty also affected these elemental contents, and the impact of human activities varied due to different land uses.