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位于新疆地区的塔克拉玛干沙漠、库姆塔格沙漠和古尔班通古特沙漠是我国沙漠的重要组成部分,它们在末次盛冰期以来的空间变化受气候影响~[1~3]。本文基于野外观察分析,结合实测数据和前人的研究资料,尝试重建这3个沙漠在末次盛冰期(LGM)和全新世大暖期(H0)的空间变化。沙漠边界内外有确定测年的晚第四纪沉积,尤其是含有风成沙、黄土的沉积序列,是指示沙漠扩张和收缩的重要标志“~[1,4]。可以认为,在现代沙漠边界外围LGM时期的风成沙往往是沙漠扩张的证据;在现代边界内H0时期的黄土堆积往往揭示了沙漠收缩与沙丘固定。
The Taklamakan Desert, the Kumtag Desert and the Gurbantunggut Desert, located in the Xinjiang region, are an important part of the desert in our country. Their spatial variations since the last glacial maximum were affected by the climate [1-3]. Based on the field observation and analysis, combined with the measured data and previous research data, this paper tries to reconstruct the spatial variations of the three deserts during the last glacial maximum (LGM) and Holocene (H0). Late Quaternary sediments dating back to the desert boundary, especially sedimentary sequences containing aeolian sand and loess, are important indicators of desert expansion and contraction. ”[1, 4] It can be considered that in the modern desert The wind-blown sand during the LGM period in the periphery of the border is often evidence of desert expansion. Loess accumulation in the H0 period in the modern border often reveals desert shrinkage and sand dune fixation.