Tectonic rotations in the Deseado Massif, southern Patagonia, during the breakup of Western Gondwana
Paleomagnetic investigation in the Deseado Massif, southern Patagonia, suggests that Triassic sedimentary rocks carry a latest Triassic to Jurassic remagnetization and that earliest Jurassic plutonic complexes carry a reversed polarity magnetization of thermoremanent origin. Despite uncertainties in...
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2008
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| LEADER | 15517caa a22011417a 4500 | ||
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| 001 | PAPER-5601 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203515.0 | ||
| 008 | 190411s2008 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-54849442652 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Somoza, R. | |
| 245 | 1 | 0 | |a Tectonic rotations in the Deseado Massif, southern Patagonia, during the breakup of Western Gondwana |
| 260 | |c 2008 | ||
| 270 | 1 | 0 | |m Somoza, R.; CONICETArgentina; email: somoza@gl.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a Paleomagnetic investigation in the Deseado Massif, southern Patagonia, suggests that Triassic sedimentary rocks carry a latest Triassic to Jurassic remagnetization and that earliest Jurassic plutonic complexes carry a reversed polarity magnetization of thermoremanent origin. Despite uncertainties in the timing of the observed remanence in the Triassic rocks and the lack of paleohorizontal control on the plutonic complexes, comparison of the derived pole positions with the most reliable Late Triassic-Jurassic apparent polar wander paths indicates that the study areas underwent significant clockwise vertical-axis rotation. In contrast, paleomagnetic results from mid-Cretaceous rocks in the region indicate no rotation. The observed crustal rotations in the Deseado Massif are thus bracketed to have occurred between Jurassic and Early Cretaceous times, documenting southern Patagonian deformation during the breakup of Western Gondwana and then enlarging the regional record of clockwise rotations associated with this event. These results suggest a more complex than previously supposed tectonic evolution of this part of South America. © 2008 Elsevier B.V. All rights reserved. |l eng | |
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP 5658 | ||
| 536 | |a Detalles de la financiación: We thank César Arriagada for performing the AMS measurements and Rita Tófalo, Pablo Pazos and Roberto Scasso for help with sedimentary petrography. This study was partially supported by CONICET grant PIP 5658 (R.S and H.V) and UK Royal Society Travel Grants (G.K.T.). Comments by Augusto E. Rapalini and Rob Van der Voo improved the manuscript. This is a contribution of the Critical Revision of Gondwana Breakup (Gondwana GGPP) project, International Polar Year (IPY). | ||
| 593 | |a CONICET, Argentina | ||
| 593 | |a Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, Argentina | ||
| 593 | |a School of Earth, Ocean and Environmental Sciences, University of Plymouth, United Kingdom | ||
| 690 | 1 | 0 | |a GONDWANA BREAKUP |
| 690 | 1 | 0 | |a JURASSIC |
| 690 | 1 | 0 | |a PALEOMAGNETISM |
| 690 | 1 | 0 | |a PATAGONIA |
| 690 | 1 | 0 | |a APPARENT POLAR WANDER PATH |
| 690 | 1 | 0 | |a CONTINENTAL BREAKUP |
| 690 | 1 | 0 | |a CRUSTAL STRUCTURE |
| 690 | 1 | 0 | |a DEFORMATION |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a JURASSIC |
| 690 | 1 | 0 | |a PALEOMAGNETISM |
| 690 | 1 | 0 | |a REMAGNETIZATION |
| 690 | 1 | 0 | |a SEDIMENTARY ROCK |
| 690 | 1 | 0 | |a TECTONIC EVOLUTION |
| 690 | 1 | 0 | |a TECTONIC STRUCTURE |
| 690 | 1 | 0 | |a TRIASSIC |
| 690 | 1 | 0 | |a PATAGONIA |
| 651 | 4 | |a SOUTH AMERICA | |
| 700 | 1 | |a Vizán, H. | |
| 700 | 1 | |a Taylor, G.K. | |
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