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Identification and classification of manganese dioxide minerals by the reflectance and microhardness analysis

Research Project

Project/Area Number 01540665
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 鉱物学(含岩石・鉱床学)
Research InstitutionKyushu University

Principal Investigator

MOTOMURA Yoshinobu (1990-1991)  Kyushu U., Fac. of Sci., Assistant, 理学部, 助手 (20037237)

福岡 正人 (1989)  九州大学, 理学部, 助手 (70117232)

Co-Investigator(Kenkyū-buntansha) FUKUOKA Masato  Kyushu U., Fac. of Sci., Assistant, 理学部, 助手 (70117232)
SHIMADA Nobutaka  Kyushu U., Fac. of Sci., Professor, 理学部, 教授 (00037235)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1989: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsManganese dioxide minerals / Reflectance / Vickers microhardness / Reflected-light microscope / 微小硬度 / 微少硬度
Research Abstract

Manganese dioxide minerals are major components of manganese deposits on land and ferromanganese nodules on sea-floor. Accurate identification of these minerals is generally not easy because they are often fine-grained, poorly crystalline, and intimately intergrown. It is still not clarified how much information on the identities can be obtained by using a reflected-light microscope which is the basic instrument for the examination of ore minerals, hence we consider that it is important to make clear the limit of usefulness of the microscopy in order to correctly and rapidly gain available information regarding the mineral texture and paragenesis. For that purpose we first review the basic mineralogy and crystal chemistry of 21 naturally-occurring manganese dioxides and secondly according to the numerical resemblances of reflectance(R)and Vickers microhardness(VHN)which are the most important quantitative parameter that can be used to identify ore minerals we classify the minerals into … More four groups from I to IV in decreasing order of both the values. Thirdly we make R and VHN measurements on representative manganese dioxides from manganese deposits in Japan and India to evaluate those values cited from references. The result obtained is concordant with it from references and the 21 minerals are divided as follows : I group(pyrolusite and nsutite), II group(cryptonelane, hollandite, coronadite, manjiroite, romanechite, woodruffite, and ramsdellite), III group(chalcophanite, aurorite, birnessite, lithiophorite, todorokite, asbolane, and janngunite), and IV group(vernadite, rancieite, takanelite, akhtenskite, and buserite). It is characteristic of this classification that the minerals in I, II, and III and IV groups substantially have chain, tunnel, and layer structures respectively and have increasing water content in ascending order of the number of group. We conclude that it is possible to identify most of these minerals under the reflected-light microscope by itself when the individual minerals are carefully examined with respect to the distinctive features for optical properties and mineral texture and paragenesis along with R and VHN. Less

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 本村 慶信: "稲倉石型マンガン鉱床における濃紅銀鉱ー淡紅銀鉱系鉱物の固溶体領域" 日本岩石鉱物鉱床学会誌. 85. 502-513 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgupta: "Petrogenesis of metamorphosed manganese deposits and the nature of the precursor sediments" Ore Geology Review. 5. 359-384 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Supriya Roy: "Atypical ferromanganese nodules from pelagic areas of the Central Indian Basin,equatorial Indian Ocean" Marine Geology. 92. 269-283 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masato Fukuoka: "Petrochemistry of piemontite-bearing assemblages in cale-silicate rocks from sausar Group,India" Journal Geological Society of India. 36. 403-412 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgypta: "Manganese-rich minerals of the pumpelly ite group from the Precambrian Sausar Group,India" American Mineralogist. 76. 241-245 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgupta: "Depositional models for manganese oxide and carbonate deposits of the Precambrian Sausar Group,India" Economic Geology. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yoshinobu Motomura: "Solid solution ranges for pyrargyrite-proustite series minerals in the Inakuraishi-type manganese deposits of Japan" J. Min. Petr. Econ. Geol.85. 502-513 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgupta: "Petrogenesis of metamorphosed manganese deposits and the nature of the precursor sediments" Ore Geology Review. 5. 359-384 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Supriya Roy: "Atypical ferromanganese nodules from pelagic areas of the Central Indian Basin, equatorial Indian Ocean" Marine Geology. 92. 269-283 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masato Fukuoka: "Petrochemistry of piemontite-bearing assemblages in calc-silicate rocks from Sausar Group, India" Journal Geological Society of India. 36. 403-412 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgupta: "Manganese-rich minerals of the pumpellyite group from the Precambrian Sausar Group, India" American Mineralogist. 76. 241-245 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Somnath Dasgupta: "Depositional models for manganese oxide and carbonate deposits of the Precambrian Sausar Group, India" Economic Geology. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 木村 慶信: "稲倉石型マンガン鉱床における濃紅銀鉱ー淡紅銀鉱系鉱物の固溶体領域" 日本岩石鉱物鉱床学会誌. 85. 502-513 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 井沢 英二: "沖縄トラフ伊平屋海嶺の熱水性炭酸塩チムニ-" 海洋科学技術センタ-試験研究報告 第7回「しんかい2000」シンポジウム特集号. 185-192 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Masato Fukuoka: "Petrochemistry of piemontiteーbearing assemblages in calcーsilicata rocks from Sausar Group,India" Journal Geological Society of India. 36. 403-412 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] Somnath Dasgupta: "Manganeseーrich minerals of the pumpellyite group from the Precambrian Sausar Group,India" American Mineralogist. 76. 241-245 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Somnath Dasgupta: "Depositional models for manganese oxide and carbonate deposits of the Precambrian Sausar Group,India" Economic Geology. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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