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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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The Properties of Thermo-Remanence Magnetization that Formed on the Red Sea Basalt Under High Pressureстатья
- Автор: Maksimochkin V.I.
- Журнал: Moscow University Physics Bulletin
- Том: 77
- Год издания: 2022
- Издательство: Allerton Press
- Местоположение издательства: New York, N.Y., United States
- Первая страница: 905
- Последняя страница: 913
- DOI: 10.3103/S002713492206008X
- Аннотация: This paper presents experiments on the creation of thermoremanent magnetization TRMp at high pressure under conditions of quasi-uniaxial compression on a basalt sample containing titanomagnetite of the composition Fe3O4, 44.7 ± 3.9%; Fe2TiO4, 49.6 ± 3.5%; FeAl2O4, 3.8 ± 2.1%; FeV2O4,0.6 ± 0.4%; Mn2TiO4, 0.8 ± 0.2%; and MgAl2O4, 0.6 ± 1.3% with a median Curie temperature of about180◦C. According to the Day–Dunlop criterion and the thermomagnetic criterion, the magnetic properties of the basalt sample on which the simulation was carried out are determined by a mixture of pseudosingle-domain and multi-domain grains. TRMp was created on cylinder samples with a diameter of 15 mm and a height of 9–10 mm in a cylinder-piston chamber with an internal diameter of 16 mm.To create a quasi-uniaxial compression, a mixture of pyrophyllite with graphite was used as a pressuretransmitting medium. The previously established effect of compression on the formation of thermoremanent magnetization was confirmed: at an increased pressure along the axis of quasi-uniaxial compression, a smaller thermoremanent magnetization is created than at normal pressure (TRMо). The TRMp/TRMо ratio at pressure P =(150−200) MPa on the basalt studied in this work was (42–52)%. The magnitude of the magnetic field Banc, which acted during the formation of TRMp, was determined. It is shown for the first time that the Thellier–Coemethod gives an underestimated value of the magnetic field, determined from the thermoremanent magnetization formed at high pressure along the quasi-uniaxial compression axis. The underestimation reaches 2.2–3.2 times at pressure P = (150−200) MPa.
- Добавил в систему: Максимочкин Валерий Иванович