文章基本信息

标题：Garnet from East Ongul Island in the Antarctic Region (EARTH SCIENCE) (Antarctic Symposium in Tokyo, 1960)
其他标题：東オングル島産柘榴石について(地学部門)(<特集>南極シンポジウム)
本地全文：下载
作者：Eiichi MINAMI ; Joyo OSSAKA ; Tadaharu NAKAMURA 等
期刊名称：Antarctic Record
印刷版ISSN：0085-7289
电子版ISSN：2432-079X
出版年度：1961
卷号：11
DOI：10.15094/00007009
语种：English
出版社：National Institute of Polar Research
摘要：The sample was collected by Prof. Torii of Chiba University. Its colour is reddish brown and translucent and it forms a somewhat elongated crystal. It shows a few cracks and is brittle. Observed under the microscope, the greater part of the thin sections is quite homogeneous, but the bottom part of the crystal contains very small amount of hornblende, limonite and albite. We select its homogeneous part for our study. The following result were obtained: S.G. 3.954±0.005 a_0 11.530 Å (lattice constant) nNa 1.778±0.002 Si0_2 40.02% Al_20_3 21.90 Fe_20_3 1.53 FeO 21.34 CaO 5.20 MgO 8.94 K_20 0.01 Na_20 0.06 H_20^- 0.18 H_20^+ - Ti0_2 0.06 P_20_5 0.00 MnO 0.93 SrO 0.00 Total 100.17% F 0.002% Less 0 for F: 0.001% Rb and Li were detected by spectrochemical analysis, but Cr was not detected and, therefore, uvarovite-component is absent. Other rarer elements were not found. From the result of chemical analysis the authors studied its garnet-components and obtained the following results: Almandite 47.64% Andradite 4.59% Pyrope 35.49% Grossularite 10.10% Spessartite 2.18% By Boeke's classification this constitution belongs to pyralspite.