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• W2069107788 abstract "High-resolution records of beryllium (10Be) production and relative paleointensity have been obtained across the Matuyama–Brunhes (M–B) reversal from the equatorial Indian Ocean (Maldives area). Both magnetic and geochemical analyses were performed from the same discrete samples to avoid any artificial depth offset. The authigenic 10Be concentrations were normalized with respect to 9Be in order to correct for potential environmental effects, while the relative paleointensity was derived from the remanent magnetization intensity after accounting for changes in magnetic concentration within the sediment. The relative paleointensity and the 10Be/9Be records are both characterized by large deviations, which culminate in the middle of the reversal. In contrast to most previous studies, and despite relative high deposition rate (4.7 cm/ka), we observed a perfect synchronism between the 10Be/9Be peak, the lowest value of relative paleointensity and the switch in direction, which indicates that bioturbation and post-depositional processes did not affect the magnetic record. This leaves no ambiguity for the stratigraphic position of the reversal located within Marine Isotopic Stage 19 as revealed by the planktonic δ18O record from the same core. The magnetic data depict a two-phase process with a precursory event preceding the rapid polarity switch, while only the second phase is present in the 10Be record, similarly to other low latitude records from the Indonesian area. Using an orbitally-tuned age model, we obtain an age of 772ka±5ka for the middle of the transition, while the precursory event occurred almost 20 ka before. We believe that the bimodal distribution emerging from the compilations of the ages of the M-B reversal results from the succession of these two events. Microtektites from the Australasian impact were found at 0.6 m below the transition (790ka±5ka B.P.) and confirm that this large event occurred 12 ka prior to the polarity transition. The distribution of tektite abundance was used to deconvolve the 10Be/9Be signal. The results confirm that the beryllium changes are concentrated during the transitional period, thus likely in presence of a multipolar geomagnetic field (or in the vicinity of a geomagnetic pole) that favored the penetration of cosmic rays and consequently increased the 10Be production. The absence of 10Be during the precursor indicates that the present site and the Indonesian ones were far away from a geomagnetic pole and that interlatitudinal atmospheric mixing was limited. The geomagnetic pole positions above the Indonesian sites during the precursor would thus be incompatible with the corresponding inclined dipolar field during this period, and suggest the dominance of low-degree harmonics." @default.
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• W2069107788 date "2014-07-01" @default.
• W2069107788 modified "2023-10-17" @default.
• W2069107788 title "Geomagnetic, cosmogenic and climatic changes across the last geomagnetic reversal from Equatorial Indian Ocean sediments" @default.
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• W2069107788 cites W1931055587 @default.
• W2069107788 cites W1964439746 @default.
• W2069107788 cites W1966661375 @default.
• W2069107788 cites W1970275596 @default.
• W2069107788 cites W1971828012 @default.
• W2069107788 cites W1974617462 @default.
• W2069107788 cites W1987192769 @default.
• W2069107788 cites W1993516320 @default.
• W2069107788 cites W1995453767 @default.
• W2069107788 cites W1996735077 @default.
• W2069107788 cites W1997937279 @default.
• W2069107788 cites W1997989802 @default.
• W2069107788 cites W1999074178 @default.
• W2069107788 cites W2003014312 @default.
• W2069107788 cites W2005200130 @default.
• W2069107788 cites W2005691090 @default.
• W2069107788 cites W2008059024 @default.
• W2069107788 cites W2009178994 @default.
• W2069107788 cites W2009575187 @default.
• W2069107788 cites W2013438951 @default.
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• W2069107788 cites W2017744818 @default.
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• W2069107788 cites W2023899869 @default.
• W2069107788 cites W2025994026 @default.
• W2069107788 cites W2029142498 @default.
• W2069107788 cites W2038265449 @default.
• W2069107788 cites W2041715565 @default.
• W2069107788 cites W2044146315 @default.
• W2069107788 cites W2049313591 @default.
• W2069107788 cites W2053166877 @default.
• W2069107788 cites W2063155650 @default.
• W2069107788 cites W2068691430 @default.
• W2069107788 cites W2073519519 @default.
• W2069107788 cites W2082837608 @default.
• W2069107788 cites W2086629537 @default.
• W2069107788 cites W2093041656 @default.
• W2069107788 cites W2094213042 @default.
• W2069107788 cites W2094446790 @default.
• W2069107788 cites W2096622871 @default.
• W2069107788 cites W2096642957 @default.
• W2069107788 cites W2115185476 @default.
• W2069107788 cites W2123259125 @default.
• W2069107788 cites W2133198896 @default.
• W2069107788 cites W2133747346 @default.
• W2069107788 cites W2135253845 @default.
• W2069107788 cites W2138990589 @default.
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• W2069107788 cites W2146605432 @default.
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• W2069107788 cites W2165621032 @default.
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• W2069107788 doi "https://doi.org/10.1016/j.epsl.2014.03.053" @default.
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