Results 41 to 50 of about 1,792 (166)

A detailed paleomagnetic and rock-magnetic investigation of the Matuyama-Bruhnes geomagnetic reversal recorded in tephra-paleosol sequence of Tlaxcala(Central Mexico)

Frontiers in Earth Science, 2015
Geomagnetic reversals are global phenomena, for about 50 years the paleomagnetists attempted to acquire as many detailed records as possible using the magnetic memory of sediments and lava flows.
Ana Maria Soler-Arechalde, Avtandyl eGoguitchaichvili, Ángel eCarrancho, Sergey eSedov, Cecilia Irene Caballero-Miranda, Beatriz eOrtega, Berenice eSolís, Juan Julio Morales Contreras, Jaime eUrrutia-Fucugauchi, Francisco eBautista   +9 more
doaj   +1 more source

Authigenic Ferrimagnetic Iron Sulfide Preservation Due to Nonsteady State Diagenesis: A Perspective From Perseverance Drift, Northwestern Weddell Sea

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, Michael L. McCormick, Stefanie A. Brachfeld, Brian A. Haley   +3 more
doaj   +1 more source

Paleomagnetism of the Devonian Onondaga Limestone Revisited [PDF]

, 1979
Ninety-six oriented samples were collected from 13 sites in the Onondaga limestone of New York for paleomagnetic study, including rock magnetism and magnetic susceptibility anisotropy.
Bathurst, Claesson, Cox, Creer, Dennis V. Kent, Dunlop, Dunlop, Fisher, Graham, Graham, Graham, Granar, Hamilton, Heller, Irving, Johnson, Kent, Kent, King, Lowrie, Løvlie, Martin, McElhinny, McElhinny, Molyneux, Oliver, Readman, Rodgers, Schuchert, Van der Voo, Van der Voo, Woodward, Zijderveld   +32 more
core   +2 more sources

Paleomagnetic Constraint of the Brunhes Age Sedimentary Record From Lake Junín, Peru

Frontiers in Earth Science, 2020
Normalized remanence, a proxy for relative geomagnetic paleointensity, along with radiocarbon and U-Th age constraints, facilitates the generation of a well-constrained chronology for sediments recovered during International Continental Scientific ...
Robert G. Hatfield, Robert G. Hatfield, Joseph S. Stoner, Katharine E. Solada, Ann E. Morey, Arielle Woods, Christine Y. Chen, David McGee, Mark B. Abbott, Donald T. Rodbell   +9 more
doaj   +1 more source

Rock magnetic and geochemical evidence for authigenic magnetite formation via iron reduction in coal-bearing sediments offshore Shimokita Peninsula, Japan (IODP Site C0020) [PDF]

, 2017
Sediments recovered at Integrated Ocean Drilling Program (IODP) Site C0020, in a fore‐arc basin offshore Shimokita Peninsula, Japan, include numerous coal beds (0.3–7 m thick) that are associated with a transition from a terrestrial to marine ...
Clyde, William C., Johnson, Joel E., Maxbauer, Daniel P., Phillips, Stephen C., Riedinger, Natascha, Setera, Jacob B., Severmann, Silke   +6 more
core   +1 more source

Ultra-high sensitivity moment magnetometry of geological samples using magnetic microscopy [PDF]

, 2016
Useful paleomagnetic information is expected to be recorded by samples with moments up to three orders of magnitude below the detection limit of standard superconducting rock magnetometers.
Lima, Eduardo A., Weiss, Benjamin P
core   +2 more sources

Intensification of Northern Hemisphere Glaciation Triggered the Red Clay to Loess‐Paleosol Shift on the Chinese Loess Plateau 2.7 Million Years Ago

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Widespread aeolian loess‐paleosol and red clay sediments on the Chinese Loess Plateau (CLP) provide a globally unique terrestrial archive of Neogene–Quaternary climate. However, the timing and associated mechanisms of red clay to loess‐paleosol shift remain debated.
Xinxia Li, Hong Ao, Chunju Huang, Xiangyu Zhao, Jinyu Kou, Qiang Sun, Pingguo Yang, Ziyun Zhang, Xiaoke Qiang, Wei Li, Peng Zhang, Jiao Yao   +11 more
wiley   +1 more source

Linearity of natural versus laboratory-imparted remanence demagnetization diagram and reliability of relative paleointensity estimation

Earth, Planets and Space
Information on geomagnetic field intensity in the past is essential for understanding the behavior and mechanism of the geodynamo. A fundamental unresolved problem of relative paleointensity (RPI) estimations from marine sediments is that changes in the ...
Toshitsugu Yamazaki, Jiaxi Li
doaj   +1 more source

Unraveling the Enrichment Mechanisms of Rare Earth Elements in Deep‐Sea Sediments: An Environmental Magnetic Perspective

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Deep‐sea rare earth elements and yttrium (REY)‐rich sediments have attracted considerable attention since their discovery in 2011. However, the environmental factors controlling REY enrichment remain poorly understood, largely because paleoceanographic proxies are absent in pelagic clays.
Xiangfeng He, Jianxing Liu, Dongjie Bi, Yamin Zhang, Mu Huang, Miao Yu, Fengdeng Shi, Jianhua Gao, Xuefa Shi   +8 more
wiley   +1 more source

Sedimentary Iron Cycling and the Origin and Preservation of Magnetization in Platform Carbonate Muds, Andros Island, Bahamas [PDF]

, 2007
Carbonate muds deposited on continental shelves are abundant and well-preserved throughout the geologic record because shelf strata are difficult to subduct and peritidal carbonate units often form thick, rheologically strong units that resist ...
Bosak, Tanja, Fike, David A., Grotzinger, John P., Kirschvink, Joseph L., Kopp, Robert E., Maloof, Adam C., Poussart, Pascale M., Vali, Hojotollah, Weiss, Benjamin P.   +8 more
core   +1 more source