新疆普鲁地区的风成沙与塔克拉玛干沙漠南缘的变迁

本文对普鲁剖面及其层位的粘度、化学元素和碳酸钙的分析与研究。结果表明:塔克拉玛干沙漠至少在早中更新世末以后就已扩及到目前沙质山地所在的沙漠边缘位置。在距今约6.7万-6.3万年间,沙漠沉积仅有-些微小的波动,自此之后,愈来愈发展。末次冰期以来的气候基本上是干冷的,并未见有明显的气候波动迹象。其气候的干冷程度为黄河中游黄土流积时所不及。

Eolian sand of the pulu Area and the Vicissitudes on southern border of Taklamakar Desert In sinkiang

Analysis of grain sizes* chemical eljements and calcium cardonate in some stratum of the pulu Profile and the research results showed that The Taklamakan Desert had expanded to the present border where the sandy mountains occupied at least since early and middle Pleistocene? About 67000-63000 years ago the desert sediments had only an insignificant fluctuation, since then It was getting sronger. Since last glacial period the climate become dry and cold on the whole and no obvious evidence of climatic fluctuation occurred-Its dry and cold extents beyond that of the loess depositional period in the middle reaches of the Huanghe River,