东南极拉斯曼丘陵区斯托尼斯半岛地貌特征初论

冰雪作用是拉斯曼丘陵地貌发育的主要营力,自拉斯曼丘陵冰盖后退裸露后,地貌发育历经两个阶段。地表崎曲、湖盆洼地众多、冰缘地貌广泛发育是该半岛地貌的主要特征,构造地貌形迹清晰。地貌的发育呈现出明显的初始性和整体性。

东南极拉斯曼丘陵斯托尼斯半岛地区化学元素分布特征

通过样品测定，运用统计方法分析了东南极拉斯曼丘陵斯托尼斯半岛岩石、土壤与风化壳、大气降水、湖泊等环境要素的化学元素丰度和特征。该区风化过程和成土过程微弱，地表环境化学元素分布具有较强的区域性特征。初步分析该地区环境中元素迁移转化规律以及低温环境条件下自然地理过程的特征。

东南极拉斯曼丘陵斯托尼斯半岛化学风化作用的初步研究

在低温环境下，拉斯曼丘陵斯托尼斯半岛表生环境具有微弱的化学风化作用。富集系数、富集分异系数等指标的分析表明，化学元素存在不同程度的富集、迁移。其中Ｃａ的迁移能力最强，Ｍｇ、Ｓｒ、Ｚｎ、Ｋ、Ｎａ等元素也均有较强的迁移能力，在不同粒级中各元素表现出不同的集散特征。风化壳硅铝率平均为５．７９，属弱风化类型，相对于母岩，风化壳中ＳｉＯ２、Ａｌ２Ｏ３均有一定淋失。化学风化作用具有由南向北增强趋势；剖面中具有中下层风化程度略高于表层的趋势。

难忘东南极

There are no national boundaries or local dwellers here. There is but a world in pure white and deep blue, enlivened only by care-free and leisurely wondering penguins, seals and whales. Here is indeed a fairy land attracting more and more tourists, and scientific investigation groups from different countries who have set up research stations to explore this unknown world. They have chosen the most severe environment to enjoy their best time of life. Among them, Bai Shanshan, a staff reporter with Sichuan Broadcasting & TV Journal is lucky enough to be the first female journalist who has twice been to the Antarctic Circle with China’s Antarctic Expedition Team. In addition to her maiden voyage along with China’s 3rd Antarctic Expedition Team in 1987 to the Antarctic Circle, she joined the team the second time in 1996 and stayed to work there for over 50 days at the Zhongshan Station from December, 1996 to February, 1997. Included in this article are the sidelights written by Bai Shanshan during her stay