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Natural remanent magnetization of the Wellman Meteorite
Author(s) -
Hamano Yozo,
Matsui Takafumi
Publication year - 1983
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl010i009p00861
Subject(s) - remanence , magnetization , meteorite , natural remanent magnetization , geology , astrobiology , physics , magnetic field , quantum mechanics
Magnetic measurements revealed that the NRM of the Wellman meteorite (H5) varies with the position within the meteorite. In the outer part with a thickness of about a few cm, the intensity of the NRM is high (∼100 Am −1 ) and the remanence consists of almost a single component. On the other hand the NRM intensity in the internal part is as low as 10 Am −1 and consists of three components. The directions of these three components are coherent among multiple samples. The two components with the lower coercivities are magnetically very soft, and must have been acquired on the earth’s surface. The magnetic stabilities of the surface magnetization and that of the hard component of the internal remanences are high and similar to each other. The stable direction of the internal magnetization is almost antipodal to the surface magnetization. These observations suggest that all the remanences of the Wellman meteorite have been acquired during the fall through the earth’s atmosphere and on the earth’s surface.