Magnetic fields of the solar nebula as recorded in chondrules from the Allende meteorite

摘要: Abstract The natural remanent magnetization (NRM) in individual chondrules from the Allende meteorite was measured. These had previously been oriented relative to each other. NRM directions of are not initially random, but they become scattered after either alternating field (AF) or thermal demagnetization. is less stable than anhysteretic (ARM) against AF-demagnetization. bulk matrix erased by 300°C. For larger it 550°C, for smaller and white inclusion a substantial decrease occurs 350°C leaving about 20% up 600°C. behavior laboratory-induced ARM under demagnetization suggest that consists at least two components TRM. One high-temperature component which acquired when were cooled through Curie temperature before assembled into meteorite. other low-temperature probably 1 Oe experienced metamorphism during assembly