A paleomagnetic and multimethod paleointensity study on the Pleistocene Khaveti lava flow sequence in Georgia
| العنوان: | A paleomagnetic and multimethod paleointensity study on the Pleistocene Khaveti lava flow sequence in Georgia |
|---|---|
| المؤلفون: | Calvo-Rathert, Manuel, Sánchez-Moreno, Elisa-María, Herrero-Bervera, Emilio, Vashakidze, Georg, Morales-Contreras, Juan, Pérez-Rodríguez, Nayeli, Goguitchaichvili, Avto, Solé Viñas, Jesús |
| المصدر: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| سنة النشر: | 2023 |
| الوصف: | A paleomagnetic and rock magnetic study was carried out on 28 successive Pleistocene basaltic lava flows from the Khaveti sequence in the Djavakheti Highland in the Lesser Caucasus in Georgia. For the present study, a new K-Ar dating has been performed on samples from the lower and the upper part of the section.Rock magnetism experiments were carried out on selected samples from all flows to characterise the carriers of remanence and obtain information about their stability. Thermomagnetic experiments mostly displayed reversible curves with magnetite as the only carrier of remanence, although titanomagnetites with differing content of titanium were also observed in some cases. Analysis of hysteresis parameters suggests that the grain size of most studied samples corresponds to pseudo single-domain particles, which can also be interpreted in terms of a mixture of single-domain and multi-domain grains. Paleomagnetic experiments revealed two clearly differing behaviours. While the upper 14 flows yielded a reverse polarity direction (D= 185.8°, I= -53.1°, α95= 2.3, k= 291.4), in the lower section of the sequence 13 flows revealed a transitional direction (D= 252.8°, I= 43.1°, α95= 3.7, k= 129.7) and one flow yielded no coherent results. Paleointensity experiments were carried out on samples from most flows with the Thellier-Coe method at the paleomagnetic laboratories of the University of Hawaii at Manoa (USA) and the University of Burgos (Spain) and with the multispecimen method at the paleomagnetic laboratory of UNAM at Morelia (Mexico). Interpretation of results is still underway. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc04b17f827eeb2b7a7b140b8313adb1 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016932 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bc04b17f827eeb2b7a7b140b8313adb1 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |