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1999•Chinese Journal of GeophysicsRequires access

ROCK-MAGNETIC PROPERTIES RELATED TO THERMAL MINERAL ALTERATIONS IN SIDERITE SAMPLES

Yongxin Pan

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Abstract

Rock-magnetic properties were systematically measured on thermal oxidationproducts of siderite samples that were collected from Dalizi iron deposit Jinn province.It was revealed that the isothermal remanent magnetization (IRM), remanencecoercivity (Her) and Curie temperature (TC) of siderite samples varied with differentthermal treatment temperatures. Maghemite (r-Fe2O3) was found to be one of theintermediate Products during siderite oxidation in air atmosphere, and with relativelyhigh thermal stability. The mineral transformations indicated by rock-magnetic methodswere proved by the X-ray diffraction (XRD)and Mossbauer effect experiments. Thecrystalline structure transitions during the siderite oxidation processes might affect themagnetic properties of oxidized siderite samples.

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What this paper is about

Rock-magnetic properties were systematically measured on thermal oxidationproducts of siderite samples that were collected from Dalizi iron deposit Jinn province.It was revealed that the isothermal remanent magnetization (IRM), remanencecoercivity (Her) and Curie temperature (TC) of siderite samples varied with differentthermal treatment temperatures. Maghemite (r-Fe2O3) was found to be one of theintermediate Products during siderite oxidation in air atmosphere, and with relativelyhigh thermal stability. The mineral transformations indicated by rock-magnetic methodswere proved by the X-ray diffraction (XRD)and Mossbauer effect experiments. Thecrystalline structure transitions during the siderite oxidation processes might affect themagnetic properties of oxidized siderite samples.

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Available abstract

Rock-magnetic properties were systematically measured on thermal oxidationproducts of siderite samples that were collected from Dalizi iron deposit Jinn province.It was revealed that the isothermal remanent magnetization (IRM), remanencecoercivity (Her) and Curie temperature (TC) of siderite samples varied with differentthermal treatment temperatures. Maghemite (r-Fe2O3) was found to be one of theintermediate Products during siderite oxidation in air atmosphere, and with relativelyhigh thermal stability. The mineral transformations indicated by rock-magnetic methodswere proved by the X-ray diffraction (XRD)and Mossbauer effect experiments. Thecrystalline structure transitions during the siderite oxidation processes might affect themagnetic properties of oxidized siderite samples.

Key concepts: Siderite, Maghemite, Isothermal process, Mineral, Curie temperature, Remanence, Materials science, Mineralogy

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ROCK-MAGNETIC PROPERTIES RELATED TO THERMAL MINERAL ALTERATIONS IN SIDERITE SAMPLES — Research Paper | ScholarLens