新疆巴里坤湖晚第四纪沉积有机地球化学特征与古地理环境

Paleogeographic Environmental Significance From Organic Geochemistric Characteristics Of Lacustrin Deposit Of Balikun Lake In Xinjiang

本文依据巴里坤湖zK00A孔沉积物有机质组成实验结果,结合CaCO_3、孢粉和^(14)C测年,讨论了该孔有机碳、有机质总量、C/N比和H/F比变化与古地理环境的关系,认为有机质总量、C/N比和H/F比等有机地球化学指标在重建古地理环境方面有重要意义,受西风环流控制的内陆干旱区在晚第四纪气候变迁中存在着相对冷湿——暖干的气候格局。

In this paper,on the basis of experimental study of organic compositions of lacustrine deposit from Hole ZKOOA in the Balikum Lake in Xinjiang,combined with the data on CaCO3 ,sporo - pollen and carbon - 14 age, We have discussed the correlation between organic essential factors, ie, organic carbon, total of organic matter,ratio of C/N and H/F etc,and paleogeographic environment. The analyses show that organic geo-chemistric signs of lacustrine deposit from the closed basin,such as the total of organic matter,ratio of C/N and H/F,are of important significance of reconstructing paleogeographic environment,and since the Late Quternagy,the climatic pattern of alternating between cold - wet and warm-dry has existed in inland arid areas,which is controlled by westlies circulation.