HOW ACCURATELY CAN NRM/SIRM DETERMINE THE ANCIENT PLANETARY MAGNETIC FIELD INTENSITY?
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dc.contributor.author | Yu Y. | |
dc.date.accessioned | 2024-09-04T09:55:36Z | |
dc.date.available | 2024-09-04T09:55:36Z | |
dc.date.issued | 2006 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=31399364 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2006, 250, 1-2, 27-37 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/44913 | |
dc.description.abstract | The present study tested grain-size dependence of thermoremanent magnetization (TRM)/saturation isothermal remanent magnetization (SIRM) as well as its stability against demagnetization. The TRM/SIRM ratio is dependent on the grain-size of magnetite, suggesting that a strong constraint on grain-size characterization is necessary to be used as a paleointensity proxy in planetary magnetism. In addition, the TRM/SIRM ratio increases as the alternating-field increases for fine-grained magnetite. Accuracy of TRM/SIRM was investigated using historic Showa lava erupted in 1946. It was observed that the natural remanent magnetization (NRM)/SIRM ratio of 0.032 is comparable to the field intensity of 46.80 μT. However, the uncertainty of NRM/SIRM was an order of magnitude larger than that of the companion Thellier estimation. Therefore, the NRM/SIRM ratio can only provide crude estimations on the absolute planetary magnetic field intensity. In practice, anisotropy correction is advisable to reduce the scatter of NRM/SIRM. © 2006 Elsevier B.V. All rights reserved. | |
dc.subject | ANISOTROPY CORRECTION | |
dc.subject | MAGNETITE | |
dc.subject | METEORITE | |
dc.subject | NRM/SIRM | |
dc.subject | PALEOINTENSITY | |
dc.title | HOW ACCURATELY CAN NRM/SIRM DETERMINE THE ANCIENT PLANETARY MAGNETIC FIELD INTENSITY? | |
dc.type | Статья | |
dc.identifier.doi | 10.1016/j.epsl.2006.07.027 |
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