Magnetism and transmission electron microscopy of Fe-Ti oxides and pyroxenes in a granulite from Lofoten, Norway

C. M. Schlinger, D. R. Veblen

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Abstract

Granulites from southwest Lofoten, Norway, often carry intense and stable components of NRM. Coercivities in excess of 100 mT and blocking temperatures up to 580°-645°C are common. Several phases in these rocks can carry stable components of NRM. Clinopyroxenes (augite with exsolved pigeonite and orthopyroxene) usually contain abundant Fe-Ti oxides, the majority of which are too small to be studied conclusively with visible light. Additionally, these rocks typically contain coarse-grained (~100-1000 μm) exsolution intergrowths of rhombohedral Fe-Ti oxides and coarse-grained magnetite. We have studied the magnetism and mineralogy of the titanohematite and the inclusion-bearing augites in one granulite sample using TEM and magnetic experiments to understand better the remanence properties of naturally occurring Fe-Ti oxides and their relationships to silicate minerals. -from Authors

Original languageEnglish (US)
Pages (from-to)14,009-14,026
JournalJournal of Geophysical Research
Volume94
Issue numberB10
StatePublished - Jan 1 1989

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ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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