Implications of Rock Mineralogy and Texture on the Feasibility of In Situ Leach Mining of Mn-Bearing Iron Formations of Central Minnesota, U.S.A

Details

• Personal Author:
  Adamson N ; Blake R ; Maroza D ; saini Eidukat B
• Description:
  The U.S. Bureau of Mines is investigating the feasibility of extracting Mn using in situ leach mining methods. Among the deposits being examined are the iron formations of the Cuyuna range, Minnesota, which contain high-tonnage, low grade deposits of manganese oxides. Manganese minerals identified include pyrolusite, cryptomelane-hollandite, manganite, braunite and lithiophorite. Ore reactivities, as measured by batch leaching tests using aqueous SO2, are compared to theoretical estimates of the leaching behavior of individual manganese minerals based on kinetic and thermodynamic evaluations. Experimental results in some cases show opposite trends to those predicted by theoretical estimates. In batch leaching tests of Cuyuna Range ores, texture was shown to be of greater importance, than thermodynamic reactivity in determining amenability to leaching. Predicting the practical potential for recovery of Mn by in situ leaching must involve identification of the effects of texture (massive, fractured-host, or interstitial) in addition to ore mineral reactivity. [Description provided by NIOSH]
• Subjects:
  Manganese Minerals Mining Occupational Health Safety
• Keywords:
  In-situ-mining Manganese-compounds Mineral-deposits Mineral-processing Mining-industry
• Series:
  Mining Publications
• ISSN:
  0883-2927
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Minnesota ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TCRC - Twin Cities Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  37-49
• Volume:
  8
• Issue:
  1
• NIOSHTIC Number:
  nn:10003360
• Citation:
  Appl Geochem 1993 Jan; 8(1):37-49
• Federal Fiscal Year:
  1993
• Peer Reviewed:
  True
• Source Full Name:
  Applied Geochemistry
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d6df86ef56921acecb94e8a883b4a411e328686b3dba3f2fecfc76461959f644ad8ff79710befeb89ccc66654ebdb37c7dab24bb0d01a2e11407194ed1904b04
• Download URL:
  https://stacks.cdc.gov/view/cdc/219471/cdc_219471_DS1.pdf
• File Type:
  [PDF - 1.32 MB ]