新疆第四纪环境演变若干问题的探讨

近年来，新疆地区第四纪环境演变研究已取得重要进展，但仍有许多问题值得进行探讨和讨论，这些问题主要表现以下几个方面：（１）新疆地区第四纪下限年代的给出目前仍有失完善；（２）新疆地区末次冰盛期以来高 湖面的环境指向不同于我国季风影响区，其产生机制各有不同。（３）干旱区生物地层学的应用某些指标的选取；（４）干旱区特殊表生环境制约下的地化元素迁移、富集规律；（５）未来环境演变趋势探讨。这些问题的讨论对于新

Discuss on Some Problems of Quaternary Environmental Changes in Xinjiang

Many important advances have been achived recently on Quaternary environmental change in Xinjiang. But,some problems are still awaiting for further understandingand worth probing and discussing: (1) The studies on the lower boundary of Quaternary inXinjiang are still inper fect at present ; (2) The indications of high lake level since Last GlacialMaximum are different from that of the monsoonal area in China,and are with different causation ; (3) To apply Bio-stratigraphic studies in arid area,some indice are of more sensitiveenvironment at indication ; (4) The rule of migration and accumulation of chemical elements,which is controlled by the surface arid. geographic circumstance is of special characteristics ;(5) Discuss on future environmental changes.The problems discussed above are of great important significance for further researchingQuaternary euvironmental development in Xinjiang.