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Characterization of the rare-earth mineralogy at the Pea Ridge Deposit, Missouri

Public Domain
File Language:
English


Details

  • Personal Author:
  • Corporate Authors:
    United States. Bureau of Mines
  • Description:
    "Iron ore deposits in south-central Missouri have emerged as a possible resource for the rare-earth elements. The pea ridge iron mine is one such deposit. Rare-earth minerals at the pea ridge iron mine are contained in breccia pipes consisting primarily of silicon oxides and feldspars. These pipes extend up through the magnetite ore body and appear to be alterations and replacement of earlier hematite. The mineralogy of these pipes is very complex and varied, which could complicate the concentration and extraction of the rare- earth minerals. This U.S. Bureau of Mines report represents a study by characterization of the mineral phases to assess the amenability and development of concentration and extraction techniques. Previous characterization of rare-earth minerals has been mainly by transmitted light microscopy. This method along with relected light microscopy, scanning electron microscopy, and x-ray diffraction was used to identify and characterize the rare-earth and associated minerals. The minerals identified were the major ore minerals, magnetite and hematite

    the rare-earth phosphates, monazite and xenotime

    the rare-earth silicate, allanite

    the minor associated minerals, cassiterite, pyrite, and apatite

    and the gangue minerals, feldspar, quartz, and actinolit" - NIOSHTIC-2

    NIOSH no. 10008716

  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
    Report
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    9 numbered pages
  • NIOSHTIC Number:
    nn:10008716
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:fbd141e80a31dd708fb590adb471fd7d1f1d3b3b01e067dc39747b1728c0bb1f3e5f0bf910fdee8c0cd7dbb663909b4783a10a38820035571539d119b58429a8
  • Download URL:
  • File Type:
    Filetype[PDF - 5.34 MB ]
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