Iron isotope signature of magnetofossils and oceanic biogeochemical changes through the Middle Eocene Climatic Optimum

R Havas, JF Savian, V Busigny - Geochimica et Cosmochimica Acta, 2021 - Elsevier
Magnetotactic bacteria (MTB) intracellularly precipitate magnetite (Fe 3 O 4) crystals that can
be preserved in the geological record. When MTB die, the so-called magnetofossils …

Paleoenvironmental significance of magnetofossils in pelagic sediments in the equatorial Pacific Ocean before and after the Eocene/Oligocene boundary

Y Lu, D Wang, X Jiang, Z Lin, Y Yang… - Journal of Geophysical …, 2021 - Wiley Online Library
Magnetotactic bacteria (MTB), sensitive to redox status, leave fossil bacterial magnetite
(magnetofossils) in sediments. The relative contents of cuboctahedral, elongated prismatic …

Diversification of iron‐biomineralizing organisms during the Paleocene‐Eocene Thermal Maximum: Evidence from quantitative unmixing of magnetic signatures of …

CL Wagner, I Lascu, PC Lippert, R Egli… - Paleoceanography …, 2021 - Wiley Online Library
Conventional magnetofossils represent magnetic mineral remains of magnetotactic bacteria.
Giant magnetofossils have no known modern analog. Both conventional and giant …

Environmental magnetic implications of magnetofossil occurrence during the Middle Eocene Climatic Optimum (MECO) in pelagic sediments from the equatorial …

JF Savian, L Jovane, M Giorgioni, F Iacoviello… - Palaeogeography …, 2016 - Elsevier
Magnetic properties of pelagic marine sediments that record the Middle Eocene Climatic
Optimum (MECO) at~ 40 Ma provide information about major environmental changes. The …

Key signatures of magnetofossils elucidated by mutant magnetotactic bacteria and micromagnetic calculations

M Amor, J Wan, R Egli, J Carlut, C Gatel… - Journal of …, 2022 - Wiley Online Library
Magnetotactic bacteria (MTB) produce single‐stranded or multi‐stranded chains of magnetic
nanoparticles that contribute to the magnetization of sediments and rocks. Their magnetic …

Coupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene–Eocene Thermal Maximum

L Chang, RJ Harrison, F Zeng, TA Berndt… - Nature …, 2018 - nature.com
Understanding marine environmental change and associated biological turnover across the
Palaeocene–Eocene Thermal Maximum (PETM;~ 56 Ma)—the most pronounced Cenozoic …

The identification and biogeochemical interpretation of fossil magnetotactic bacteria

RE Kopp, JL Kirschvink - Earth-Science Reviews, 2008 - Elsevier
Magnetotactic bacteria, which most commonly live within the oxic-anoxic transition zone
(OATZ) of aquatic environments, produce intracellular crystals of magnetic minerals …

Magnetofossil spike during the Paleocene‐Eocene thermal maximum: Ferromagnetic resonance, rock magnetic, and electron microscopy evidence from Ancora, New …

RE Kopp, TD Raub, D Schumann, H Vali… - …, 2007 - Wiley Online Library
Previous workers identified a magnetically anomalous clay layer deposited on the northern
United States Atlantic Coastal Plain during the Paleocene‐Eocene thermal maximum …

Magnetite magnetofossils record biogeochemical remanent magnetization in hydrogenetic ferromanganese crusts

W Yuan, H Zhou, Z Yang, JR Hein, Q Yang - Geology, 2020 - pubs.geoscienceworld.org
Records of natural remanent magnetization (NRM) and geomagnetic polarity reversals
preserved within ferromanganese (Fe-Mn) crusts, together with the application of fine …

Mass-dependent and-independent signature of Fe isotopes in magnetotactic bacteria

M Amor, V Busigny, P Louvat, A Gélabert, P Cartigny… - Science, 2016 - science.org
Magnetotactic bacteria perform biomineralization of intracellular magnetite (Fe3O4)
nanoparticles. Although they may be among the earliest microorganisms capable of …