The Distribution of Secondary Minerals and Evaporites at Lake Vanda, Victoria Land, Antarctica

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概要

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• Secondary minerals and evaporites around Lake Vanda, Wright Valley have been identified by X-ray diffraction techniques in order to investigate the areal distribution of these minerals. Gypsum is the most abundant mineral near the shoreline of Lake Vanda and halite is the most abundant mineral in the elevated areas. Secondary minerals are abundant on the Dais indicating low-grade hydrothermal metamorphism of the dolerite. Based on the distribution of evaporites, the authors propose that the origin of magnesium and potassium ions in lake water may be clarified by the value of Mg/K, that is, magnesium and potassium ions with Mg/K value less than 4 originated from the weathering of rocks plus sea spray, while those with the value greater than 4 originated from sea water.

• 国立極地研究所の論文

著者

• Hayashi Tamotsu

  Sophia University

• Ossaka Joyo

  Tokyo Institute Of Technology

• Minato Ichiro

  Tokyo Institute Of Technology

• Morikawa Hideki

  Tokyo Institute of Technology

関連論文

• A View on the Formation of Saline Waters in the Dry Valleys
• The Distribution of Secondary Minerals and Evaporites at Lake Vanda, Victoria Land, Antarctica
• EXPERIMENTAL FORMATION OF KAOLINITE FROM VERMICULITE

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