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

Charles M Schlinger, D. R. Veblen

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23 Citations (Scopus)

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)
JournalJournal of Geophysical Research E: Planets
Volume94
Issue numberB10
StatePublished - 1989
Externally publishedYes

Fingerprint

magnetism
pyroxenes
Norway
Magnetism
granulite
Transmission Electron Microscopy
Oxides
oxides
transmission electron microscopy
oxide
Transmission electron microscopy
Bearings (structural)
rocks
Rocks
Silicate minerals
silicate minerals
Ferrosoferric Oxide
pigeonite
Silicates
magnetite

ASJC Scopus subject areas

  • Medicine(all)
  • Engineering(all)

Cite this

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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",
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T1 - Magnetism and transmission electron microscopy of Fe-Ti oxides and pyroxenes in a granulite from Lofoten, Norway

AU - Schlinger, Charles M

AU - Veblen, D. R.

PY - 1989

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N2 - 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

AB - 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

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