Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate
文献类型：SCI/SSCI论文
| 作者 | Wang Y. |
| 发表日期 | 2010 |
| 关键词 | Carbonate Lake sediments Tibetan Plateau Water chemistry Spatial distribution Lake Pumayum Co calcite precipitation qinghai lake plateau variability constance climate monsoon record basin area |
| 英文摘要 | A combination of water and sediment chemistry was used to investigate carbonate production and preservation in Lake Pumayum Co (altitude 5,030 m a.s.l.), south Tibet, China. We compared the chemical composition of lake water in various parts of the lake with that of input rivers and found that the loss of Ca(2+) results from calcite sedimentation induced by evaporation and biogenic precipitation. This is supported by evaporation data from the catchment and delta(18)O measurements on water. Results suggest that CaCO(3) is the predominant carbonate in this lake. There is a positive correlation in the sediments among concentrations of total inorganic carbon (TIC), Ca, total organic carbon (TOC), and total nitrogen, confirming that most carbonates in sediment are endogenic. The Jiaqu River is the largest inflow to Lake Pumayum Co and has a strong influence on both lake water chemistry and sediment composition. The river and lake bathymetry influence carbonate sedimentation by affecting water flow velocity and growing conditions for macrophytes. Different carbon contents and relationships between TIC and TOC in the two long cores from different depths in the lake reveal that hypolimnetic conditions also influence carbonate precipitation and preservation. |
| 出处 | Journal of Paleolimnology |
| 卷 | 43 |
| 期 | 3 |
| 页 | 463-474 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0921-2728 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23727]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wang Y.. Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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