The manganiferous limonite deposits at Kuroishi city, Aomori prefecture occur in the paddy soil of alluvial epoch. The ore minerals were studied by microscopic observation, chemical analysis, X-ray powder method, differential thermal analysis and X-ray probe microanalysis. Those ore minerals were composed of goethite, amorphous limonite and birnessite. The birnessite is considered to be precipitated after limonite. The mode of occurrence and ore texture of those ore deposits show that they are of supergene concentric origin
The bedded manganese ore deposits of the Ohtaniyama mine occur in the low grade metamorphosed chert ...
Tephroite occurs as aggregates of small prismatic crystals up to 2.5×2.0 mm in the bedded manganese ...
The bedded manganese ore deposits of Hijikuzu mine occur in the highly metamorphosed Jurassic quartz...
The limonite and manganese oxide ores deposited from recent mineral springs at Arikurazawa occur on ...
The bedded and lenticular manganese ore deposits composed mainly of manganese silicate ores at Hijik...
The bedded manganese ore deposits of Minamimata Mine occur in the bentonite clay consisting of montm...
About 150 samples of limonite from 38 different localities in Japan were studied by means of microsc...
Alleghanyite occurs as aggregates of fine grained prismatic to anhedral crystals in the bedded manga...
Serandite from the contact metamorphosed bedded manganese ore deposit of Matsumae-oku ore body of th...
The bedded manganese ore deposits of the Ohtaniyama mine occur in the low grade metamorphosed chart ...
The bedded manganese ore deposits of Shiraiwa Mine occur in andesitic breccia tuff of miocene age. T...
Manganiferous aegirine occurs as banded or lenticular aggregate of short prismatic crystals up to 0....
Manganoan grunerite is found in a quartz vein up to 15 cm in width that cutting foot wall of banded ...
Choho Mine located in Otobe Village, Hokkaido, is one of the bedding manganese deposits in Tertiary ...
Manganoan richterite occurs as a single crystal up to 15×8 mm in size, and lenticular aggregates of ...
The bedded manganese ore deposits of the Ohtaniyama mine occur in the low grade metamorphosed chert ...
Tephroite occurs as aggregates of small prismatic crystals up to 2.5×2.0 mm in the bedded manganese ...
The bedded manganese ore deposits of Hijikuzu mine occur in the highly metamorphosed Jurassic quartz...
The limonite and manganese oxide ores deposited from recent mineral springs at Arikurazawa occur on ...
The bedded and lenticular manganese ore deposits composed mainly of manganese silicate ores at Hijik...
The bedded manganese ore deposits of Minamimata Mine occur in the bentonite clay consisting of montm...
About 150 samples of limonite from 38 different localities in Japan were studied by means of microsc...
Alleghanyite occurs as aggregates of fine grained prismatic to anhedral crystals in the bedded manga...
Serandite from the contact metamorphosed bedded manganese ore deposit of Matsumae-oku ore body of th...
The bedded manganese ore deposits of the Ohtaniyama mine occur in the low grade metamorphosed chart ...
The bedded manganese ore deposits of Shiraiwa Mine occur in andesitic breccia tuff of miocene age. T...
Manganiferous aegirine occurs as banded or lenticular aggregate of short prismatic crystals up to 0....
Manganoan grunerite is found in a quartz vein up to 15 cm in width that cutting foot wall of banded ...
Choho Mine located in Otobe Village, Hokkaido, is one of the bedding manganese deposits in Tertiary ...
Manganoan richterite occurs as a single crystal up to 15×8 mm in size, and lenticular aggregates of ...
The bedded manganese ore deposits of the Ohtaniyama mine occur in the low grade metamorphosed chert ...
Tephroite occurs as aggregates of small prismatic crystals up to 2.5×2.0 mm in the bedded manganese ...
The bedded manganese ore deposits of Hijikuzu mine occur in the highly metamorphosed Jurassic quartz...
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