Magnetic mineral diagenesis

AP Roberts - Earth-Science Reviews, 2015 - Elsevier
Reduction–oxidation (redox) reactions occur during burial because sediments contain
reactive mixtures of oxidised and reduced components. Diagenetic chemical reactions …

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 …

A critical appraisal of the “Day” diagram

AP Roberts, L Tauxe, D Heslop… - Journal of Geophysical …, 2018 - Wiley Online Library
Abstract The “Day” diagram (Day et al., 1977, https://doi. org/10.1016/0031-9201 (77) 90108-
X) is used widely to make inferences about the domain state of magnetic mineral …

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 …

Magnetic characterization of geologic materials with first-order reversal curves

R Egli - Magnetic measurement techniques for materials …, 2021 - Springer
Since their introduction in Earth sciences in 1990, first-order reversal curve (FORC)
measurements have become an important tool for characterizing geologic materials. The …

Signatures of reductive magnetic mineral diagenesis from unmixing of first‐order reversal curves

AP Roberts, X Zhao, RJ Harrison… - Journal of …, 2018 - Wiley Online Library
Diagenetic alteration of magnetic minerals occurs in all sedimentary environments and
tends to be severe in reducing environments. Magnetic minerals provide useful information …

Classification of a complexly mixed magnetic mineral assemblage in Pacific Ocean surface sediment by electron microscopy and supervised magnetic unmixing

J Li, Y Liu, S Liu, AP Roberts, H Pan, T Xiao… - Frontiers in Earth …, 2020 - frontiersin.org
Unambiguous magnetic mineral identification in sediments is a prerequisite for
reconstructing paleomagnetic and paleoenvironmental information from environmental …

Difference in relative paleointensity recording efficiency of magnetic mineral constituents in a sediment core off Chile

T Yamazaki, J Li, T Shimono… - Journal of Geophysical …, 2023 - Wiley Online Library
Progress of relative paleointensity (RPI) estimations using marine sediments has greatly
contributed to better understanding of the behavior of the past geomagnetic field. To …

Past environmental and circulation changes in the South China Sea: Input from the magnetic properties of deep-sea sediments

C Kissel, C Laj, Z Jian, P Wang, C Wandres… - Quaternary Science …, 2020 - Elsevier
Abstract The South China Sea, located at the transition between the Pacific and the Indian
Ocean, receives every year, mainly during the rain season, enormous amounts of river …

Remanence acquisition efficiency in biogenic and detrital magnetite and recording of geomagnetic paleointensity

L Chen, D Heslop, AP Roberts, L Chang… - Geochemistry …, 2017 - Wiley Online Library
Relative paleointensity (RPI) variations of Earth's magnetic field are widely used to
understand geomagnetic field behavior and to develop age models for sedimentary …