Consulta: subjectFacets:"Marine magnetics and palaeomagnetics"
Registros recuperados: 2
Data/hora: 17/06/2024 17:26:06

High-resolution palaeomagnetic record from Sea of Marmara sediments for the last 70 ka
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Makaroğlu, Özlem; Nowaczyk, Norbert R; Eriş, Kadir K; Çağatay, M Namık.
Magnetostratigraphic and geochemical analyses were performed on two sediment cores recovered from the Sea of Marmara to investigate geomagnetic field variations over the last 70 ka. A chronology for each of the two cores was developed from eight AMS 14C datings, tephrochronology, and tuning of Ca concentrations with stadials and interstadials observed in Greenland ice core oxygen isotope data. Based on the age models, cores MD01–2430 and MRS-CS19 reach back to 70 ka and 32 ka, respectively. High average sedimentation rates of 43 cm/kyr for core MD01–2430 and 68 cm/kyr for core MRS-CS19 allow high-resolution reconstruction of geomagnetic field variations for the Sea of Marmara. Mineral magnetic properties are sensitive to glacioeustatic sea-level changes...
Tipo: Text
Palavras-chave: Geomagnetic excursions; Marine magnetics and palaeomagnetics; Palaeointensity; Palaeomagnetic secular variation; Palaeomagnetism.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74416/74131.pdf

Advanced insights into magmatism and volcanism of the Mozambique Ridge and Mozambique Basin in the view of new potential field data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Koenig, Matthias; Jokat, Wilfried.
P&gt;A new plate tectonic model is presented which describes the emplacement of the Mozambique Ridge off southeast Africa as the result of long lasting volcanic activity (140-122 Ma) during the initial opening between Africa and Antarctica. Thus, an oceanic origin for the Mozambique Ridge is proposed. This model is based on a new and systematic high resolution magnetic anomaly data set acquired across the Mozambique Ridge and throughout the Mozambique Basin. Data from the Mozambique Basin allow the identification of Mesozoic magnetic anomalies from M0r to M26 (124.61-155.3 Ma) with previously unmatched accuracy. Small-scale fracture zones are recognized by offsets of magnetic anomalies in the westernmost part of the basin. Additionally, a bend in the major...
Tipo: Text
Palavras-chave: Magnetic anomalies: modelling and interpretation; Marine magnetics and palaeomagnetics; Oceanic plateaus and microcontinents; Large igneous provinces; Africa; Antarctica.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34261/32626.pdf