北海道夕張市紅葉山付近の堆積岩中の海緑石

概要

論文の詳細を見る
Some glauconite specimens were collected near Momijiyama, Yubari City, Hokkaido and studied mineralogically. Although their X-ray patterns are similar to that of 1M mica, their 001 reflections between 10 and 12 Å show that they have an interstratification with 15-25% expandable layers. After treated with K^+ -solution, they are determined to have 20-30% expandable layers. The difference of the estimated percentage of the expandable layers before and after the treatment seems to show the presence of two kinds of the silicate layers with the double water and single water layers in the interstratification. Glauconites from the upper formations are more abundant in the expandable layers than those from the lower formations. The hydroxides of magnesium, alminum and iron in the expandable layers given by Thompson and Hower (1975) can not be detected in these specimens.
日本粘土学会の論文
1976-11-25