| 摘要: |
| 测量表明,哈纳斯湖最大水深达188.5m,平均水深达120.1m,优质淡水容量达53.78×108m3,均在我国湖泊中居突出地位。横断面为罕见的典型箱形,断陷作用仍在强烈进行之中。湖底表层沉积物粒度参数之分布主要受纵向搬运作用控制,局部受横向搬运作用影响。沉积物的矿物学特征与元素分布特征明显受沉积环境控制。沉积物中营养元素含量总体偏低。210Pb法测得平均沉积速率为0.52mm/a,难以补偿断陷作用,湖盆将继续加深。 |
| 关键词: 哈纳斯湖 水下地貌 表层沉积物 |
| DOI：10.18307/1993.0303 |
| 分类号: |
| 基金项目: |
|
| SUBAQUEOUS GEOMORPHOLOGY AND SEDIMENTS OF HANAS LAKE IN XINJIANG |
|
Feng Min
|
|
Nanjing Institute of Geography and Limnology, Academia Sinica, Nanjing 210008
|
| Abstract: |
| Lake survey shows that Hanas Lake, with maximun water depth of 188. 5m, mean water depth of 120.1m and excellent fresh water capacity of 5.378km3, is one of very prominent lakes in China. The cross section of the lake bottom shows an unusual chest-like form and the lake faults are still in intensive action now. The grain size distribution is controlled chiefly by longitudinal transportation, and influnced by traverse transportation in the local area with quite low concentration of the most nutrient elements in the sediments. Minerals and chemical elements of the sediments are obviously under the control of sedimentary environments, with quite low concentration of the most elements in the sediments. Its sedimentary rate is measured 0.52mm/a by 210Pb,but insufficient to compensate the lake faulting,as a result,the lake depth will get increased even more. |
| Key words: Hanas Lake subaqueous geomorphology sedimentary rate |
