Tungsten minerals from the Kaneuchi mine, Kyoto Prefecture

Ashida, Sakichi

doi:10.2465/ganko1941.47.10

Cited by 2 publications

(6 citation statements)

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“…(Table 1). Zonal arrangements of minerals are often observed in the vein, which was previously reported by Watanabe and Sasaki (1956) and Ashida (1962); from the wall-side toward the center of the vein, muscovite (or cassiterite), wolframite, scheelite, and sulfide ( Fig. 3).…”

Section: General Aspects Of Ore Depositssupporting

confidence: 73%

“…9). Ferberite end member reported by Ashida (1962) from this deposit has not been recognized in the present investigation*.…”

Section: Resultscontrasting

confidence: 52%

“…Neither horizontal nor vertical compositional variation within an indi-vidual vein was recognized as pointed out by Ashida (1962). However, it should be stressed that the spatial variations of composition between the two vein swarms do exist.…”

Section: Resultsmentioning

confidence: 97%

“…The Tsudo deposit, the only working one in (1 to 11 belonging to the Western Suei v.;8,Shin v.;9,Showa v.;10,11,Doshin v.; (12 to 14 belonging to the Eastern veins) 12, Chitose v.;13,Gessei v.;14, to No. 11 veins correspond to the Central veins by Ashida (1962). (Table 1).…”

Section: General Aspects Of Ore Depositsmentioning

confidence: 99%

“…3). Long prismatic wolframite crystals tend to * Although Ashida (1962) Ashida (1962) and Imai et al (1972). analyzed by a conventional chemical analysis.…”

Section: General Aspects Of Ore Depositsmentioning

confidence: 99%

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X-ray and microprobe analyses of wolframite series from the Kaneuchi mine, Kyoto Prefecture, Japan.

Nakashima

Watanabe

Soeda

1985

J. Japan. Assoc. Min. Petr. Econ. Geol.

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By means of X-ray diffraction and microprobe analyses, compositions of wolframites from the wolfram-quartz veins at the Kaneuchi mine, Southwest Japan, have been examined. In view of the compositional variation within a single crystal, its shape, and coexisting minerals, wolframites have been deposited only with an oscillatory zoning of less than about 3mole% MnWO4 and their compositions change in part by later ore solutions along a peripheral part or crack. Bulk compositions of wolframites obtained by X-ray analyses range from 35.1 to 61.1mole% MnWO4, throughout the mine. However, it is worth while to mention that wolframites in the Eastern veins are higher in MnWO4 contents by about 10mole% than those in the Western veins. A positive correlation in chemical composition between wolframites and associated wall rocks strongly indicates that wall rock chemistry plays a very important role in controlling the wolframite compositions concerned. Regardless of a variety of wall rocks, such compositional differences of wolframites observed between the two vein swarms are concluded to be mainly controlled also by solution pH. Somewhat higher pH is responsible for wolframites to be more Mn-rich in the Eastern veins than in the Western veins.

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Section: General Aspects Of Ore Depositssupporting

confidence: 73%

“…9). Ferberite end member reported by Ashida (1962) from this deposit has not been recognized in the present investigation*.…”

Section: Resultscontrasting

confidence: 52%

Section: Resultsmentioning

confidence: 97%

Section: General Aspects Of Ore Depositsmentioning

confidence: 99%

“…3). Long prismatic wolframite crystals tend to * Although Ashida (1962) Ashida (1962) and Imai et al (1972). analyzed by a conventional chemical analysis.…”

Section: General Aspects Of Ore Depositsmentioning

confidence: 99%

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