Results 21 to 30 of about 1,792 (166)

Magnetic fingerprint of southern Portuguese speleothems and implications for paleo- and environmental magnetism [PDF]

, 2014
Environmental magnetism of speleothems is still in its early stage of development. Here we report on our investigation of the environmental and paleomagnetic information that has been recorded in speleothems, and what are the factors that control its ...
Abrajevitch, Adkins, Bailey, Barton, Bellanca, Berner, Beynen, Bindschedler, Braissant, Brook, Canaveras, Carvallo, Cañaveras, Cañaveras, Cisowski, Cornell, Daeron, Degawa, Doubrovine, Dunlop, Dunlop, Egli, Egli, Egli, Ellwood, Evans, Fairchild, Fairchild, Fairchild, Fanjat, Font, Frank, Frisia, Gadd, Genty, Genty, Ghaleb, Halgedahl, Hanesch, Harrison, Herries, Heslop, Hill, Hoffland, Howard, Jex, Johnson, Kaufman, Kostka, Kruiver, Krása, Lachniet, Lascu, Latham, Latham, Lean, Liu, Lu, McDermott, McGillen, McMillan, Meert, Morinaga, Morinaga, Openshaw, Osete, Pan, Perkins, Perkins, Pruner, Riechelmann, Roberts, Robertson, Scheinost, Scheinost, Scholl, Sinclair, Stock, Strauss, Symonds, Thompson, Vaughan, Wang, White, White, White, Xu, Zhu, Özdemir   +88 more
core   +3 more sources

Micrometeorites: A possible bias on the sedimentary magnetic record

Geochemistry, Geophysics, Geosystems, 2008
Micrometeorites are strongly magnetic and continuously accumulate at the Earth's surface. On the basis of previously acquired magnetic data, we investigated at which conditions micrometeorites can bias the sedimentary palaeomagnetic and rock magnetic ...
C. Suavet, P. Rochette, J. Gattacceca, L. Folco   +3 more
doaj   +1 more source

Wavelet-based verification of a relative paleointensity record from the North Pacific

Earth, Planets and Space, 2019
We present a relative paleointensity (RPI) record for the last ~ 1.1 Myr estimated from a sediment core in the central North Pacific, with quality verification using wavelet analysis.
Ji Young Shin, Yongjae Yu, Wonnyon Kim
doaj   +1 more source

Magnetofossil Spike During the Paleocene-Eocene Thermal Maximum: Ferromagnetic Resonance, Rock Magnetic, and Electron Microscopy Evidence from Ancora, New Jersey, USA [PDF]

, 2007
Previous workers identified a magnetically anomalous clay layer deposited on the northern United States Atlantic Coastal Plain during the Paleocene-Eocene Thermal Maximum (PETM).
Kirschvink, Joseph L., Kopp, Robert E., Raub, Timothy D., Schumann, Dirk, Smirnov, Alexei V., Vali, Hojatollah   +5 more
core   +4 more sources

Evidence for detrital remanent magnetization carried by hematite in Devonian red beds from Spitsbergen; palaeomagnetic implications [PDF]

Geophysical Journal International, 1984
Summary. Palaeomagnetic investigation of the Devonian red bed succession of Central Spitsbergen, the Wood Bay Formation, uncovered stable magnetic directions associated with blocking temperatures above 600°C. Rock magnetic properties are characterized by features commonly found in hematite-bearing red sandstones.
R. Lovlie, T. Torsvik, M. Jelenska, M. Levandowski   +3 more
openaire   +1 more source

The identification and biogeochemical interpretation of fossil magnetotactic bacteria [PDF]

, 2008
Magnetotactic bacteria, which most commonly live within the oxic-anoxic transition zone (OATZ) of aquatic environments, produce intracellular crystals of magnetic minerals, specifically magnetite or greigite.
Kirschvink, Joseph L., Kopp, Robert E.
core   +1 more source

Diagenesis of Magnetic Minerals in Active/Relict Methane Seep: Constraints From Rock Magnetism and Mineralogical Records From Bay of Bengal

Frontiers in Earth Science, 2021
In this study, we conducted a comprehensive investigation of rock magnetic, mineralogical, and sedimentological records of sediment cores supplemented by a high resolution seismic data to elucidate the controls of structural and diagenetic (early vs ...
Virsen Gaikwad, Virsen Gaikwad, Firoz Badesab, Pawan Dewangan, Mahender Kotha   +4 more
doaj   +1 more source

Magnetotaxis and acquisition of detrital remanent magnetization by magnetotactic bacteria in natural sediment: First experimental results and theory [PDF]

Geochemistry, Geophysics, Geosystems, 2014
The widespread occurrence of magnetotactic bacteria (MTB) in several types of marine and freshwater sediment, and the role of fossil magnetosomes (magnetofossils) as main remanent magnetization carriers therein, has important paleomagnetic and paleoenvironmental implications.
Xuegang Mao, Ramon Egli, Nikolai Petersen, Marianne Hanzlik, Xiangyu Zhao   +4 more
openaire   +1 more source

Atmospheric halogen and acid rains during the main phase of Deccan eruptions: magnetic and mineral evidence [PDF]

, 2014
Environmental changes linked to Deccan volcanism are still poorly known. A major limitation resides in the paucity of direct Deccan volcanism markers and in the geologically short interval where both impact and volcanism occurred, making it hard to ...
Adatte, T., Fabre, Sébastien, Font, Eric, Keller, G., Khozyem, H., Mirão, José, Nedelec, A., Ponte, J., Spangenberg, J. E., Veiga-Pires, C.   +9 more
core   +1 more source

Occurrence and Distribution Patterns of Magnetic Particles Within Stalagmite Growth Laminae

Geochemistry, Geophysics, Geosystems, 2022
The concentrations of magnetic particles in stalagmites depend greatly on the regional hydrologic condition, and thus can act as an important proxy for paleoclimate reconstruction.
Taiheng Shi, Jianyv Ding, Zongmin Zhu, Hongbin Zhang, Junhua Huang   +4 more
doaj   +1 more source