2024-03-28T23:41:57Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02006708
2022-02-15T03:35:45Z
1642837622505:1642837937095:1642837939792
1642838403551:1642838406414
琉球諸島に於けるリン鉱の産地と品質
On the Phosphate Rock Deposits in the Ryukyu Islands and Principal Components of Phosphate Rockes
兼島, 清
Kneshima, Kiyoshi
open access
Surveying the phosphate rock deposits in the Ryukyu Islands,the writer found that, in the Ryukyu Islands the phosphate rock deposits might be grouped into two main types as follows;\n(1)Calcarious phosphate rocks.…… deposit in pocket form on hills near seashores.(2)Iron,aluminium phosphate rocks.……deposit in calcium cave. Principal components were determined in order to clarify chemical characteristics of the phosphate rocks in the Ryukyu Islands. Besides the phosphate rocks in the Ryukyu Islands which were mainly investigated,the following rocks and minerals were also tested for a comparative study;(a)Phosphate rocks in the South Sea Islands(b)Continental phosphate rocks(c)Apatites in igneous rocks The phosphate rocks in the Ryukyu Islands contain more iron,aluminium and silica than others, and a close correlation exists among these components. This fact suggests that the phosphate rocks contain iron and aluminium as silicate.
紀要論文
琉球大学文理学部
Arts and Science Division, University of the Ryukyus
jpn
departmental bulletin paper
NA
http://hdl.handle.net/20.500.12000/22282
http://hdl.handle.net/20.500.12000/22282
https://u-ryukyu.repo.nii.ac.jp/records/2006708
0557-577X
AN0025080X
琉球大学文理学部紀要 理学篇
6
11
26
https://u-ryukyu.repo.nii.ac.jp/record/2006708/files/No6p011.pdf