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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2002
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56841209 |
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Table of Contents:
- Hysteresis properties of chondritic meteorites: new results for chondrules from the Allende meteorite Daniel Flores Gutiérrez Jaime Urrutia Fucugauchi Ciencias de la Tierra rock magnetism chondrules Solar Nebula Allende meteorite Hysteresis properties of twenty individual chondrules from a ~50 cc piece of the Allende carbonaceous chondritic meteorite,with diameters between about 0.08 and 0.44 cm are reported. Coercive force Hc varies from about 3 mT to 32.5 mT. Magneticremanence to saturation magnetization ratios Mr/Ms vary from about 0.025 to 0.25. If magnetite is the main magnetic mineral,then this variation in hysteresis parameters suggests a range of particle grain sizes and shapes, corresponding to pseudo-singledomain PSD and multidomain MD states. No chondrules with single domain SD states were observed. Simple relationshipsamong mass, density, size and shape of chondrules and magnetic hysteresis properties are proposed. Three groups with characteristiccoercitivity values are distinguished: (a) group 1 for chondrules with Hc between 0 and 5 mT; (b) group 2 for those with Hcbetween 5 and 15 mT; and (c) group 3 for those with Hc larger than 15 mT. Group 1 chondrules plot within the MD field, group 2chondrules plot in the PSD and intermediate fields with low Mr/Ms values, and group 3 chondrules plot in the PSD field with highMr/Ms values. 2002 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56841209 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.41