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Mineral assemblages in contact with native tellurium are: quartz-sylvanite at Teine, quartz-hessite-sylvanite-tellurantimony at Kobetsuzawa, quartz at Mutsu, quartz-stutzite-hessite-sylvanite-tetradymite at Kawazu, quartz at Suzaki, and quartz-goldfieldite at Iriki. The peak patterns of XRD for native tellurium from these six ores are nearly identical to that of JCPDS 4–554. Their chemical compositions of Te range from 98.16 to 100.73 wt.%, showing nearly pure tellurium. Other elements detected are: Se of 0–0.85 and Cu of 0–0.74 at Teine, Sb of 0.45–0.47 and Se of 0.19–0.27 at Kawazu, Se of 0.22–1.11 and Sb of 0–0.49 at Suzaki, and Cu of 0.69–0.98, As of 0.22–0.28 and Bi of 0–0.22 wt.% at Iriki. No other elements are detected in the ores of Kobetsuzawa and Mutsu. The ranges of associated minor compositions are consistent with those of the experimental phase. The differences would be related to associate minerals. 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Chemistry and Occurrences of Native Tellurium from Epithermal Gold Deposits in Japan
http://hdl.handle.net/2241/117393
http://hdl.handle.net/2241/1173930461adbf-05c2-4661-a57f-f6661e8844e1
名前 / ファイル | ライセンス | アクション |
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RG_61-3.pdf (6.7 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2012-07-13 | |||||
タイトル | ||||||
タイトル | Chemistry and Occurrences of Native Tellurium from Epithermal Gold Deposits in Japan | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
NAKATA, Masataka
× NAKATA, Masataka× KOMURO, Kosei |
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著者別名 |
小室, 光世
× 小室, 光世 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The chemistry and mode of occurrences of native tellurium in the epithermal gold ores from Teine, Kobetsuzawa, Mutsu, Kawazu, Suzaki and Iriki in Japan are examined. Mineral assemblages in contact with native tellurium are: quartz-sylvanite at Teine, quartz-hessite-sylvanite-tellurantimony at Kobetsuzawa, quartz at Mutsu, quartz-stutzite-hessite-sylvanite-tetradymite at Kawazu, quartz at Suzaki, and quartz-goldfieldite at Iriki. The peak patterns of XRD for native tellurium from these six ores are nearly identical to that of JCPDS 4–554. Their chemical compositions of Te range from 98.16 to 100.73 wt.%, showing nearly pure tellurium. Other elements detected are: Se of 0–0.85 and Cu of 0–0.74 at Teine, Sb of 0.45–0.47 and Se of 0.19–0.27 at Kawazu, Se of 0.22–1.11 and Sb of 0–0.49 at Suzaki, and Cu of 0.69–0.98, As of 0.22–0.28 and Bi of 0–0.22 wt.% at Iriki. No other elements are detected in the ores of Kobetsuzawa and Mutsu. The ranges of associated minor compositions are consistent with those of the experimental phase. The differences would be related to associate minerals. The mineral assemblages in these ores agree well with the previously proposed experimental phase relations in Au-Ag-Te ternary system for 120–280°C. The Suzaki ore has high Te-Au assemblage: from calaverite-sylvanite-krennerite via native tellurium to petzite, with changing mineralization stage, whereas the Kobetsuzawa and the Kawazu ores have high Te-Ag assemblage of tellurium-hessite, and native tellurium-stutzite-hessite-sylvanite, respectively. The Teine ore has intermediate assemblage of native tellurium-sylvanite. The mineral assemblages in the Au-Ag-Te system are related to the hydrothermal environment especially to the pH condition, i.e. Au rich assemblages under acidic and Ag rich assemblages under intermediate pH conditions, being supported by alteration mineral species. The other telluriferous epithermal gold deposits not in association with native tellurium such as Agawa, Date, Takeno, Chugu, Chitose, Sado and Kushikino are estimated to have been formed under higher pH conditions as adularia and calcite occur in these deposits. The pH-Eh diagram for aqueous tellurium species and tellurium minerals at 250°C indicates that the region of native tellurium occurs between those of aqueous telluride and tellurous species at lower pH, being consistent with their mineral assemblages in ores and alteration envelopes. | |||||
書誌情報 |
Resource geology 巻 61, 号 3, p. 211-223, 発行日 2011-07 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1751-3928 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11228480 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1111/j.1751-3928.2011.00159.x | |||||
権利 | ||||||
権利情報 | © 2011 The Authors. Resource Geology © 2011 The Society of Resource Geology The definitive version is available at wileyonlinelibrary.com |
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著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Blackwell Publishing | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/117393 | |||||
識別子タイプ | HDL |