Original remanent magnetization of Ontario potsherds
| Autor: | K. W. Christie, E. J. Schwarz |
|---|---|
| Rok vydání: | 1967 |
| Předmět: |
Atmospheric Science
Paleomagnetism Ecology Paleontology Soil Science Forestry Geophysics Aquatic Science Oceanography Thermal decay Earth's magnetic field Space and Planetary Science Geochemistry and Petrology Remanence Earth and Planetary Sciences (miscellaneous) Curie temperature Geology Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 72:3263-3269 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jz072i012p03263 |
| Popis: | The nature of the original remanent magnetization of eighteen potsherds dated between 500 B.C. and 1700 A.D. was investigated by comparing its thermal decay with the acquisition of pTRM in the present geomagnetic field. The original remanence of these specimens is complex rather than pure and stable TRM acquired during cooling through the Curie point in the contemporary geomagnetic field after the pots were originally fired. A comparison of CRM and pTRM acquired by synthetic Fe3O4 with the results obtained for the potsherds indicates that most of the sherds acquired CRM during firing well below the Curie point and pTRM during cooling after the original firing. A comparison of the original pTRM component of the sherds with pTRM acquired in the present geomagnetic field suggests a decrease in geomagnetic total force in South-West Ontario during the last two millenniums. This conclusion is in qualitative agreement with results obtained elsewhere. |
| Databáze: | OpenAIRE |
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