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Science 18 September 1981:
Vol. 213. no. 4514, pp. 1372 - 1374
DOI: 10.1126/science.213.4514.1372
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Articles

Antiphase Domains and Reverse Thermoremanent Magnetism in Ilmenite-Hematite Minerals

CHARLES A. LAWSON 1, GORDON L. NORD JR. 2, ERIC DOWTY 3, and ROBERT B. HARGRAVES 3

1 Department of Geological and Geophysical Sciences, Princeton University, Princeton, New Jersey 08544
2 U.S. Geological Survey, Reston, Virginia 22092
3 Department of Geological and Geophysical Sciences, Princeton University

Examination of synthetic ilmenite-hematite samples by transmission electron microscopy has for the first time revealed the presence of well-defined antiphase domains and antiphase domain boundaries in this mineral system. Samples quenched from 1300°C have a high density of domain boundaries, whereas samples quenched from 900°C have a much lower density. Only the high-temperature samples acquire reverse thermoremanent magnetism when cooled in an applied magnetic field. The presence of a high density of domain boundaries seems to be a necessary condition for the acquisition of reverse thermoremanent magnetism.

Submitted on April 2, 1981
Revised on June 16, 1981


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
High-resolution and energy-filtered TEM of the interface between hematite and ilmenite exsolution lamellae: Relevance to the origin of lamellar magnetism.
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Diagenesis of magnetic mineral assemblages in multiply redeposited siliciclastic marine sediments, Wanganui basin, New Zealand.
G. S. Wilson and A. P. Roberts (1999)
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P. R. Renne, P. R. Renne, and T. C. Onstott (1988)
Science 242, 1152-1155
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