A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina)
Paleomagnetic secular variations (PSV) give us information on the mechanisms of the geodynamo and can also be used for stratigraphic correlation on a regional scale. In this article we present a high-resolution paleomagnetic and rock magnetic study of two cores, LCTF1 and LCTF2, collected at Carmen...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v280_n_p40_Gogorza http://hdl.handle.net/20.500.12110/paper_00319201_v280_n_p40_Gogorza |
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paper:paper_00319201_v280_n_p40_Gogorza2023-06-08T14:58:53Z A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) Argentina Lake sediments Late Holocene Paleomagnetism Secular variations Geomagnetism Lithology Stratigraphy Argentina Lake sediments Late Holocene Paleomagnetism Secular variation Lakes geomagnetic field Holocene lacustrine deposit paleomagnetism remanent magnetization secular variation Argentina Tierra del Fuego [(PRV) Argentina] Paleomagnetic secular variations (PSV) give us information on the mechanisms of the geodynamo and can also be used for stratigraphic correlation on a regional scale. In this article we present a high-resolution paleomagnetic and rock magnetic study of two cores, LCTF1 and LCTF2, collected at Carmen Lake (Tierra del Fuego, Argentina). An analysis of rock magnetic data suggests that the remanence signal is carried by Titanomagnetite grains in stable pseudo single domain (PSD) state. Notwithstanding the special mechanism of sedimentary deposition, the sequence is characterised by good paleomagnetic properties and can be used to reconstruct a continuous stratigraphic record that provides high-resolution declination, inclination and relative paleointensity curves for the period 1000–4000 cal years BP. The constructed PSV curves are in very good agreement with the available records of Southern Argentina, implying very promising results in the construction of curve patterns for the region. A comparison of the records of southern Argentina with the most recent models available demonstrates that there is a noticeable lack of agreement, which is interpreted as the critical need to add more data from the southern hemisphere in the construction of the geomagnetic field models. © 2018 Elsevier B.V. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v280_n_p40_Gogorza http://hdl.handle.net/20.500.12110/paper_00319201_v280_n_p40_Gogorza |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Lake sediments Late Holocene Paleomagnetism Secular variations Geomagnetism Lithology Stratigraphy Argentina Lake sediments Late Holocene Paleomagnetism Secular variation Lakes geomagnetic field Holocene lacustrine deposit paleomagnetism remanent magnetization secular variation Argentina Tierra del Fuego [(PRV) Argentina] |
| spellingShingle |
Argentina Lake sediments Late Holocene Paleomagnetism Secular variations Geomagnetism Lithology Stratigraphy Argentina Lake sediments Late Holocene Paleomagnetism Secular variation Lakes geomagnetic field Holocene lacustrine deposit paleomagnetism remanent magnetization secular variation Argentina Tierra del Fuego [(PRV) Argentina] A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| topic_facet |
Argentina Lake sediments Late Holocene Paleomagnetism Secular variations Geomagnetism Lithology Stratigraphy Argentina Lake sediments Late Holocene Paleomagnetism Secular variation Lakes geomagnetic field Holocene lacustrine deposit paleomagnetism remanent magnetization secular variation Argentina Tierra del Fuego [(PRV) Argentina] |
| description |
Paleomagnetic secular variations (PSV) give us information on the mechanisms of the geodynamo and can also be used for stratigraphic correlation on a regional scale. In this article we present a high-resolution paleomagnetic and rock magnetic study of two cores, LCTF1 and LCTF2, collected at Carmen Lake (Tierra del Fuego, Argentina). An analysis of rock magnetic data suggests that the remanence signal is carried by Titanomagnetite grains in stable pseudo single domain (PSD) state. Notwithstanding the special mechanism of sedimentary deposition, the sequence is characterised by good paleomagnetic properties and can be used to reconstruct a continuous stratigraphic record that provides high-resolution declination, inclination and relative paleointensity curves for the period 1000–4000 cal years BP. The constructed PSV curves are in very good agreement with the available records of Southern Argentina, implying very promising results in the construction of curve patterns for the region. A comparison of the records of southern Argentina with the most recent models available demonstrates that there is a noticeable lack of agreement, which is interpreted as the critical need to add more data from the southern hemisphere in the construction of the geomagnetic field models. © 2018 Elsevier B.V. |
| title |
A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| title_short |
A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| title_full |
A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| title_fullStr |
A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| title_full_unstemmed |
A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina) |
| title_sort |
continuous late holocene paleosecular variation record from carmen lake (tierra del fuego, argentina) |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v280_n_p40_Gogorza http://hdl.handle.net/20.500.12110/paper_00319201_v280_n_p40_Gogorza |
| _version_ |
1768545223528415232 |