| 台湾大鬼湖沉积物元素分布所反映的古环境意义 |
| |
| 引用本文： | 罗建育,陈镇东.台湾大鬼湖沉积物元素分布所反映的古环境意义[J].湖泊科学,1998,10(3):13-18. |
| |
| 作者姓名： | 罗建育 陈镇东 |
| |
| 作者单位： | 中山大学海洋地质及化学研究所!高雄，804，中山大学海洋地质及化学研究所!高雄，804 |
| |
| 基金项目： | NSC87－2611－M－110－006－GP资助 |
| |
| 摘 要： | 位于台湾省南部的大鬼湖，由于湖底常缺氧等特殊自然条件，使湖底沉积物免遭干扰，而能完整地记录过去气候的环境的变动．其岩芯中出现的白层，有明显较低的有机质含量和C／P、N／P、S／P及Si／Al比值．与较高的Si／P、Fe／C、Mn／C、Fe／Mn和Mg／Al比值，显示当时气候可能较干冷，集水区植生较差、湖水位较低，而且环境较氧化．相比之下，富含有机质的黑色沉积物，则反映气候较暖湿、湖水面至少升高2m，而且集水区土壤和水体较还原。
|
| 关 键 词： | 古气候 湖积物 大鬼湖 沉积物 古环境 元素分布 |
| 收稿时间： | 1997/11/4 0:00:00 |
| 修稿时间： | 2/9/1998 12:00:00 AM |
Pal eoenvironm ental Records From the Elem ental Distributions in the Sediments of Great Ghost Lake in Taiwan. China |
| |
| Lou Jiann-Yuh and Chen Chen-Tung Arthur.Pal eoenvironm ental Records From the Elem ental Distributions in the Sediments of Great Ghost Lake in Taiwan. China[J].Journal of Lake Science,1998,10(3):13-18. |
| |
| Authors: | Lou Jiann-Yuh and Chen Chen-Tung Arthur |
| |
| Institution: | Institute of Marine Geology and Chemistry, National Sun Yat-sen University, Gaoxiong 804, China and Institute of Marine Geology and Chemistry, National Sun Yat-sen University, Gaoxiong 804, China |
| |
| Abstract: | The sediments deposited in the anoxic Great Ghost Lake in southern Taiwan, China were undisturbed due to the lake's unique hydrological and geographic conditions. As a result,past climatic and environmental records were well preserved. The distinctive white laminations appeared in the generally black sediments are characteristic of lower organic-matter content, and lower C/P, N/P, S/P and Si/Al ratios, but higher Si/P, Fe/C, Mn/C, Fe/Mn and Mg/Al ratios.These indicate times of cooler/driver climate, poorer plant growth around the drainage area, lower water-level and more oxidized conditions in the soil and in the water column. On the other hand, the organic-matter-rich black sediments were deposited in a warmer/wetter climate under a more reduced condition. In addition, the variations in the Mg/Al rations seem to reflect at least 12% changes in salinity or water volume, or 2m changes in the water level. |
| |
| Keywords: | Paleoclimate lake sediment Great Ghost Lake ratio of the elements |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《湖泊科学》浏览原始摘要信息 |
| 点击此处可从《湖泊科学》下载免费的PDF全文 |
|
