摘要
黄河源头鄂陵湖北岸CK6孔深19.81—24.26m段发现厚4.45m的纯冰层,对冰样及其上下地层的土样、水样化验及对湖周围地貌、第四纪的研究结果表明,厚层冰属深埋藏湖冰,生成年代为距今35030—45209年,成冰时的年平均气温约-10℃。
The 4.45 m-thick pure ice lens had been discovered firstly in depths from 19.81 to 24.26m of the bore No.6, which locates in north bank of the Elin Lake, in source region of the Yellow River. Radiocabon 14C dating, X ray diffraction, pollen analysis, micro-palaeontogy, chemical components, environmentalisotope 2H,3H , 18O and freezing point of the soil, ice and water samples from the bore were tested. And microorganism in the ice had been also appraised with microscope. Combined with the research on geomorghy and quaternary around the lake, the ice lens are determined as a kind of deep-buried lake ice, formed in 35 030-45 209 a B.P., and annual mean air temperature is about -10癈 during that time.
出处
《冰川冻土》
CSCD
北大核心
1990年第3期201-207,共7页
Journal of Glaciology and Geocryology
关键词
深埋藏
湖冰
古气候
冰
黄河源头区
source region of the Yellow River, deep-buried lake ice, palaeoclimate
