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Age and Provenance of Loess deposits on the Northern Flank of Tianshan Mountain 被引量:1
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作者 yuan qingdong zhang zhicheng wu chaodong guo zhaojie 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2009年第3期648-654,共7页
The distribution, optically stimulated luminescence dating and granulometric properties suggest that the loess on the northern flank of Tian Shan should be divided into two types. One which is like mantle and is named... The distribution, optically stimulated luminescence dating and granulometric properties suggest that the loess on the northern flank of Tian Shan should be divided into two types. One which is like mantle and is named type A, is located on the windward slopes and dated to about 54.5±5.73 Ka. The other, called type B, lies flatly on the terraces of the rivers or low hills and penetrated 30.8±2.05 Ka ago. Here we study the origin and the age of two types of loess, and a model of loess formation is proposed. The dust was entrained from the Gobi Desert located to the north of Tian Shan by the monsoon from Mongolia, obstructed by the high mountains and deposited on the windward slopes of the mountains. The rivers and flows then transported the aeolian loess to low terraces and piedmont alluvial plains. 展开更多
关键词 LOESS optically stimulated luminescence dating granulometric properties North Tianshan
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