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Magnetite dissolution, diachronous greigite formation, and secondary magnetizations from pyrite oxidation: Unravelling complex magnetizations in Neogene marine sediments from New Zealand

Rowan, Christopher J; Roberts, Andrew


Detailed rock magnetic and electron microscope analyses indicate that the magnetic signature of Neogene marine sediments from the east coast of New Zealand is dominated by the authigenic iron sulphide greigite. The greigite is present as a mixed population of stable single domain and superparamagnetic grains, which is consistent with authigenic growth from solution. This growth can result from pyritization reactions soon after deposition, which also leads to dissolution of most detrital...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2005.10.017


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