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Orbital-scale variation in the magnetic content as a result of sea level changes in Papua New Guinea over the past 400 ka ArchiMer
Huang, Yin-sheng; Lee, Teh-quei; Hsu, Shu-kun.
We describe the orbital-scale environmental variation around Papua New Guinea (PNG) for the last 400 ka based on the environmental magnetism. Six magnetic parameters and the δ18O record of the core MD05-2928 are presented in the study. Results of magnetic analyses reveal opposite responses to different environmental conditions: Magnetic minerals were relatively fewer and finer in interglacial periods and were more and coarser in glacial periods. The reason could be suggested: In interglacial periods, sediments coming from central New Guinea were transported by the coastal currents in the northern Coral Sea and then imported to the core site location. Magnetic minerals would be relatively fewer and finer due to this longer transportation process. In glacial...
Tipo: Text Palavras-chave: Papua New Guinea; Coral Sea; Wavelet analysis; Orbital forcing; Milankovitch cycles.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00296/40694/39691.pdf
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