A reconnaissance magnetostratigraphy of Georgian Plio- Quaternary volcanic provinces (southern Caucasus)
A palaeomagnetic and rock magnetic study was carried out on samples of the Djavakheti, Khrami and Kazbeki regions inGeorgia. Samples were taken from 44 localities from 247 subaerial lava flows and from 3 lacustrine sedimentary layers, interbeddedbetween flows. Rock magnetic experiments showed that c...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2001 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:56840204 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=56840204 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra Pliocene palaeomagnetism southern Caucasus Magnetostratigraphy |
| Sumario: | A palaeomagnetic and rock magnetic study was carried out on samples of the Djavakheti, Khrami and Kazbeki regions inGeorgia. Samples were taken from 44 localities from 247 subaerial lava flows and from 3 lacustrine sedimentary layers, interbeddedbetween flows. Rock magnetic experiments showed that characteristic remanent magnetisation is mainly carried by magnetiteof pseudo single domain size. 113 lava flows and 1 sedimentary layer yielded normal polarity magnetisation, 130 lava flows werereversly magnetised and 4 lava flows and 2 sedimentary layers displayed an intermediate polarity direction. A mean direction ofD=4.7°, I=58.3°, k=28, α95=3.7° was obtained for all volcanic units, except those of intermediate polarity. A preliminarymagnetostratigraphy of the Georgian volcanic provinces is proposed. |
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