Results 71 to 80 of about 748 (152)
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.Abstract During early diagenesis of marine sediments, iron‐bearing minerals undergo a series of redox reactions until they reach equilibrium with reactive chemical components. Paleomagnetic records in the sediments subjected to severe diagenesis can be distorted or lost due to iron mineral dissolution, and hence these sediments were often excluded from
Jiaxi Li +3 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2020 We document magnetic mineral diagenesis with high‐resolution magnetic susceptibility, hysteresis, isothermal remanent magnetization, and other rock magnetic measurements through a shallow sulfate‐methane transition (SMT) at Perseverance Drift—a high ...
Brendan T. Reilly +3 more
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Controlled biosynthesis of greigite (Fe3S4) in magnetotactic bacteria
Naturwissenschaften, 1990 We report the presence of intracellular greigite crystals in two different types of rod-shaped single-celled magnetotactic bacteria collected from sulfide-rich ...
Heywood, Brigid R. +4 more
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Contrasting Recording Efficiency of Chemical Versus Depositional Remanent Magnetization in Sediments
Geophysical Research LettersHow and when sedimentary rocks record Earth's magnetic field is complex. Most studies assume a time‐progressive lock‐in mechanism during sediment deposition called depositional remanent magnetization (DRM).
Sophie C. Roud, Stuart A. Gilder
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Frontiers in Earth ScienceThe diagenetic pathways, mineral types, and products of magnetic minerals in gas hydrate-bearing sediments are closely linked to burial depth. During IODP Expedition 375, drilling at the northern Hikurangi margin recovered 83.09 m of core from the gas ...
Shixian Liu, Xuesen Li, Kunyu Xu
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Cleaner WaterHeavy metals such as lead and cadmium cause adverse effects on all living organisms. Their remediation is complex in the aqueous phase. Biochar is a low-cost, environmentally friendly adsorbent material that exhibited a limited ability to adsorb Pb2+ and
Prashan M. Rodrigo +1 more
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An electrokinetic study of synthetic greigite and pyrrhotite
Geochimica et Cosmochimica Acta, 1994 Abstract The isoelectric points of synthetic greigite, Fe3S4, and pyrrhotite, Fe1−xS, in 10−3−1.1 10−2 M NaCl solution at a Fe −4 and a S −4 were determined to be pH 3 and 2, respectively. Below pH 2 for pyrrhotite and below pH 3 for greigite, the surfaces are positively charged; above these pH values the ...
Dekkers, M.J., Schoonen, M.A.A.
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The Effect of Sonication on Acoustic Properties of Biogenic Ferroparticle Suspension
Archives of Acoustics, 2015 Superparamagnetic iron oxide nanoparticles (SPION) synthesised chemically usually need the modification of the particle surface. Other natural sources of magnetic particles are various magnetotactic bacteria.
Arkadiusz JÓZEFCZAK +5 more
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Ocean and Coastal ResearchMagnetic experiments have provided insight into the preservation of magnetite in sediments of the Inner Sea of the Maldives during early diagenesis.
Igor Gustavo da Fonseca Carrasqueira +2 more
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ANHYDROUS SYNTHESIS OF GREIGITE Fe3S4
Mineralogical Journal, 1972 HIROMOTO NAKAZAWA, KOUSUKE SAKAGUCHI
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