Magnetic remanence in the Murchison meteorite
作者： Gunther KLETETSCHKA , Tomas KOHOUT , Peter J. WASILEWSKI
DOI: 10.1111/J.1945-5100.2003.TB00275.X
关键词: Chondrule 、 Rock magnetism 、 Geology 、 Carbonaceous chondrite 、 Parent body 、 Geochemistry 、 Remanence 、 Murchison meteorite 、 Earth's magnetic field 、 Meteorite
摘要: The Murchison meteorite is a carbonaceous chondrite containing small amount of chondrules, various inclusions, and matrix with occasional porphyroblasts olivine and/or pyroxene. It also contains amino acids that may have served as the necessary components for origin life. Magnetic analyses identify an ultrasoft magnetic component due to superparamagnetism significant part remanence. rest remanence be electric discharge in form lightning bolts formed acids. level does not support this possibility points minimum ambient field acquisition. We our observation by showing normalized mineral acquisition properties establish calibration curve suitable rough paleofield determination. When using approach, 1-2% natural left terrestrial rocks TRM CRM determines geomagnetic intensity irrespective grain size or type (with exception hematite). same method applied where measured 200-2000 nT during after formation parent body.
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