[HTML][HTML] Magnetotactic bacteria and magnetofossils: ecology, evolution and environmental implications

P Goswami, K He, J Li, Y Pan, AP Roberts… - npj Biofilms and …, 2022 - nature.com
Magnetotactic bacteria (MTB) are a group of phylogenetically diverse and morphologically
varied microorganisms with a magnetoresponsive capability called magnetotaxis or …

Unlocking information about fine magnetic particle assemblages from first-order reversal curve diagrams: Recent advances

AP Roberts, D Heslop, X Zhao, H Oda, R Egli… - Earth-Science …, 2022 - Elsevier
The magnetic domain state of a material determines its magnetic recording capability and
magnetic properties. Constraining the domain state of magnetic components within …

[HTML][HTML] Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages

L Chang, BAA Hoogakker, D Heslop, X Zhao… - Nature …, 2023 - nature.com
Reconstructions of ocean oxygenation are critical for understanding the role of respired
carbon storage in regulating atmospheric CO2. Independent sediment redox proxies are …

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 …

Abrupt Northwest Atlantic deep-sea oxygenation decline preceded the Palaeocene-Eocene Thermal Maximum

P Xue, L Chang, E Thomas - Earth and Planetary Science Letters, 2023 - Elsevier
Reconstruction of oceanic redox conditions across the Palaeocene-Eocene Thermal
Maximum (PETM,∼ 55.93 Ma) provides crucial information on potential PETM triggers and …

Interpretation of anhysteretic remanent magnetization carriers in magnetofossil‐rich marine sediments

Q Zhang, AP Roberts, S Ge, Y Liu, J Liu… - Journal of …, 2022 - Wiley Online Library
The anhysteretic remanent magnetization (ARM) is an important magnetic parameter for
quantifying the concentration of “fine”, mostly sub‐micron ferrimagnetic particles in rocks and …

Discovery of giant magnetofossils within and outside of the Palaeocene-Eocene Thermal Maximum in the North Atlantic

P Xue, L Chang, Z Pei, RJ Harrison - Earth and Planetary Science Letters, 2022 - Elsevier
Giant magnetofossils have exceptionally large grain sizes and peculiar morphologies
compared to conventional biogenic magnetite nanoparticles. The origin of these unusual …

Primordial magnetotaxis in putative giant paleoproterozoic magnetofossils

U Donardelli Bellon, W Williams… - Proceedings of the …, 2024 - National Acad Sciences
Magnetotactic bacteria produce chains of nanoscopic iron minerals used for navigation,
which can be preserved over geological timescales in the form of magnetofossils …

A depth‐transect of ocean deoxygenation during the Paleocene‐Eocene Thermal Maximum: Magnetofossils in sediment cores from the southeast atlantic

P Xue, L Chang, GR Dickens… - Journal of Geophysical …, 2022 - Wiley Online Library
Abstract The Paleocene‐Eocene Thermal Maximum (PETM,∼ 56 Ma) presents a past
analog for future global warming. Previous studies provided evidence for major loss of …

Influence of magnetofossils on paleointensity estimations inferred from principal component analyses of first‐order reversal curve diagrams for sediments from the …

K Inoue, T Yamazaki, Y Usui - Geochemistry, Geophysics …, 2021 - Wiley Online Library
Relative abundance of magnetite originated from magnetotactic bacteria (magnetofossils) in
sediments may influence relative paleointensity (RPI) estimations of the geomagnetic field …