| 南极乔治王岛菲尔德斯半岛土壤的化学风化作用 |
| |
| 引用本文： | 刘耕年.南极乔治王岛菲尔德斯半岛土壤的化学风化作用[J].极地研究,1991,3(1):22-29. |
| |
| 作者姓名： | 刘耕年 |
| |
| 作者单位： | 北京大学地理学系 北京 |
| |
| 基金项目： | 国家南极考察委员会支持项目，并得到国家自然科学基金资助 |
| |
| 摘 要： | 西南极南设得兰群岛乔治王岛菲尔德斯半岛土壤化学分析表明土壤中存在着一定的化学风化作用。相对于母质,土壤中的SiO_2、Al_2O_3、Fe_2O_3、FeO、MgO,GaO和Na_2O淋失,K_2O、H_2O~+、H_2O~-、TiO_2和P_2O_5富集。土壤中SiO_2/Al_2O_3的平均值为4.71,属弱风化壳类型。硅铝比反映出成土作用时间越长,土壤的风化程度越高,化学风化作用大于南极大陆边缘和内部。Al_2O_3在南极的淋失率大于SiO_2,使较老土壤剖面由下向上硅铝比增大。土壤的化学性质很大程度上取决于母质。南极强烈的冻融扰动作用破坏了土壤分层。土壤中存在着较强的水合作用。
|
| 关 键 词： | 化学风化 淋失 富集 硅铝比 菲尔德斯半岛 |
THE CHEMICAL WEATHERING IN SOILS AT FILDES PENINSULA OF KING GEORGE ISLAND, ANTARCTICA |
| |
| Liu Gengnian.THE CHEMICAL WEATHERING IN SOILS AT FILDES PENINSULA OF KING GEORGE ISLAND, ANTARCTICA[J].Chinese Journal of Polar Research,1991,3(1):22-29. |
| |
| Authors: | Liu Gengnian |
| |
| Abstract: | Chemical analysis shows remarkable chemical weathering effects in the soils at
Fildes Peninsula of King George Island, South Shetland Islands, Antarctica. Comparing
with the bedrock, the elements of SiO2, Al2Og, Fe2O, FeO3, MgO, CaO and Na2O have
been eluviated and K2O, H2O+, H2O-, TiO2 and P2O5 enriched. The average
ratio of SiO2/Al2O3 is 4.71 which show a weak chemical wearhering property of the soils and the ratio of SiO2 / A12O3 also suggest that the longer the weathering processes take place, the deeper the weathering level in the soils is. The chemical weathering processes at Fildes Peninsula are greater than that of Antarctic Continent. The eluviating rate of Al2O3 is greater than SiO2 so that the SiO2 /A12O3 increases from base to top in a soil profile at Antarctica. The chemical proportion in soils are greatly dependented on the bed rock by which they develop. The strong cryo-disturbance. destroy the horizons of the soil. The high content of HO2+ and H2O- shows significant hydration in the soils at Antarctica. |
| |
| Keywords: | chemical weathering eluviation hydration SiO2/Al2O3 ratio Fildes Peninsula |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
|
