Tectonic and geochronological implications of variably timed magnetizations carried by authigenic grigite in marine sediments from New Zealand
Detailed scanning electron microscope observations, coupled with elemental microanalyis, confirm the presence of a chemical remanent magnetization carried by authigenic greigite (Fe3S4) in uplifted Neogene marine sediments from the Hikurangi Margin of New Zealand. Normal polarity samples from the studied section have declinations that are deflected ∼60° clockwise of reversed polarity samples, indicating the presence of two distinct magnetizations separated by several million years of tectonic...[Show more]
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