Better constrained selection of the Paleozoic West Gondwana (South America) paleomagnetic poles for the APWP determination
| Autor: | B. Bayou, M.E.M. Derder, Said Maouche, M. Amenna, Bernard Henry |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
geography
Paleomagnetism geography.geographical_feature_category 010504 meteorology & atmospheric sciences Paleozoic Apparent polar wander 010502 geochemistry & geophysics 01 natural sciences Craton Paleontology Gondwana Geophysics Geochemistry and Petrology Homogeneous South american Structural geology Geology 0105 earth and related environmental sciences |
| Zdroj: | Studia Geophysica et Geodaetica. 61:185-198 |
| ISSN: | 1573-1626 0039-3169 |
| DOI: | 10.1007/s11200-016-1036-9 |
| Popis: | The reliability of an Apparent Polar Wander Path (APWP) obviously depends on the paleomagnetic poles used to determine it. The APWP of Africa and South America are fairly well defined for the 330–260 Ma interval. However, this study pointed out a moderate shift between these two curves, and an incoherency of the South American data, contrary to the African ones, which are homogeneous. A number of South American pole positions were re-evaluated in an effort to better constrain the APWP for the entire continent. Most of discarded poles correspond to sites at the area of the junction of Cordillera with the stable craton. That could have structural implications for the evolution of the western margin of the Gondwana. A new criterion for the evaluation of paleomagnetic poles reliability for APWP is presented. Based on comparison of data from different continents and labeled “coherence” criterion, it is independent from Van der Voo’s ones. |
| Databáze: | OpenAIRE |
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