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1987 Fiscal Year Final Research Report Summary

A Study on Mineral Composition of Silica Sands, with Special Reference to Heavy Minerals

Research Project

Project/Area Number 61550458
Research Category

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

Allocation TypeSingle-year Grants
Research Field 資源開発工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SUZUKI Shunichi  Tohoku University, 工学部, 教授 (80005214)

Co-Investigator(Kenkyū-buntansha) ODA Yukito  Tohoku University, 工学部, 助手 (40005369)
NAMBU Masateru  Tohoku University, 工学部, 助手 (10005340)
Project Period (FY) 1986 – 1987
KeywordsIndustrial mineral / Silica sand / Heavy mineral / Glass inclusion / 流体包有物
Research Abstract

The purpose of this study was to provide basic information on mineral dressing and utilization of silica sands. The work was done on the silica sand deposits of the Mogami amd Okitama districts, Yamagata Prefecture, Japan.
1. As silica sands decrease in grain size, the Al_2O_3 and Fe_2O_3 contents in silica sands increase. Feldspar is the major source of Al_2O_3 in silica sands. Therefore, it is necessory to remove feldspar in silica sands by undercutting finer grains or flotation for reducing Al_2O_3 content.
2. Quartz in silica sands were mostly derived from volcanic and granitic rocks. Minute glass inclusions are trapped in the quartz of volcanic origin, and crystal and fluid inclusions are trapped in the quartz of granitic origin. Crystal inclusions consist of apatite, biotite, amphibole and zircon. Liquid of fluid inclusions have high concentration of salt. It must be considered the inclusion content for the utilization of silica sands as silica materical ofhigh purity.
3. Ilmenite is the chief constituent of heavy minerals in silica sands. Magnetite, zircon, epidote, biotite, amphibole, pyroxene, anatase, rutile, andalusite and others are accessories. The magnetite/ilmenite ratio is 1/15 to 1/20. Magnetite was mostly altered into the maghemite. These heavy minerals are mostly able to remove from silica sands by gravity separation using table or spiral concentrator. Futheremore, Fe_2O_3 content may be reduced by undercuttin finer grains and magnetic separation.
4. It is necessary to remove the minerals which are hard to melt, such as andalusite and zircon, for the utilization as raw material of plate glass.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 鈴木舜一,小田幸人,南部正光,南部松夫: 岩鉱.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鈴木舜一,小田幸人,南部正光,南部松夫: 岩鉱.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SUZUKI,S., ODA,Y., NAMBU,Mu., NAMBU,Mo.: "Mineral Composition of Silica Sands in the Mogami District Yamagata Prefecture, Japan." Jour.Jpn.Min.Petr.Econ.Geol.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SUZUKI,S., ODA,Y., NAMBU,Mu. NAMBU,Mo.: "Mineral Composition of Silica Sands in the Iide Mine, Yamagata Prefecture, Japan" Jour.Jpn.Min.Petr.Econ.Geol.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1989-03-30  

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