Results 31 to 40 of about 161 (89)

Coupled Paleomagnetism and 40Ar/39Ar Dating of Latera Ignimbrites (Vulsini Volcanic District, Italy) Unravel Processes Associated to Piston‐Collapse Calderas

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Correlation of ignimbrite units at polygenic calderas is mandatory for the reconstruction of caldera‐forming events and proper identification of their eruption dynamics. However, ignimbrites erupted at different times from the same caldera can display similarities in composition and lithology that can hamper proper correlation of outcrops ...
Arianna Beatrice Malaguti, Stéphane Scaillet, Marco Pistolesi, Mauro Rosi, Fabio Speranza, Alberto Renzulli   +5 more
wiley   +1 more source

Late Pleistocene‐Holocene Paleosecular Variation Dating of Cave Sediments: Insights From Grotta Romanelli (Apulia, Italy)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Grotta Romanelli, located in southern Italy, is a natural coastal cave renowned for its exceptional stratigraphical record and its critical role in understanding the Middle Pleistocene‐Holocene geomorphological and paleoenvironmental evolution of the Mediterranean region.
E. Tema, L. Lanci, G. S. Mariani, P. Pieruccini, I. Mazzini, R. Sardella   +5 more
wiley   +1 more source

A bootstrap algorithm for deriving the archeomagnetic field intensity variation curve in the Middle East over the past 4 millennia BC

, 2010
International audienceRecent compilations of archeomagnetic intensity data have shown the existence of outliers. Acknowledging this problem, we propose a new way of generating and studying the uniqueness of regional archeomagnetic master curves bypassing
E. Thébault, Thébault, E., Y. Gallet, Gallet, Y.   +3 more
core   +1 more source

Assessing the Reliability of the Pseudo‐Thellier Estimates in Fired Ceramics and Source Clays

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract The geomagnetic field's intensity is key to understanding the Earth's core dynamics and their surface impacts. While the Thellier–Thellier method remains the standard for recovering absolute paleointensity from baked materials, it is time‐consuming and may alter magnetic mineralogy due to heating cycles. The pseudo‐Thellier method offers a non‐
Wilbor Poletti, Mikaelly G. Rocha, Plínio Jaqueto, Gelvam A. Hartmann, Grasiane L. Mathias, Daniele Brandt, Ricardo I. F. Trindade, Paulo Maximiano   +7 more
wiley   +1 more source

Low Geomagnetic Field Intensity in Southern China 6,000 Years Ago

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract The West Pacific Anomaly (WPA), a low geomagnetic field anomaly observed in the 16th to 18th centuries, represents a recently recognized and complex feature of Earth's magnetic field. However, the history of the WPA is still uncertain due to a scarcity of paleointensity data in Southeast Asia.
Xin Luo, Jiabo Liu, Huapei Wang, Maximilian Schanner, Yuan Zhang, Peng Xie, Jigen Tang, Peng Han, Quan Li, Fei Han, Xiaowei Chen, Chen Wen, Wen Zhong, Yufan Hu, Qingsong Liu   +14 more
wiley   +1 more source

A Holocene Paleosecular Variation Record From the Northwestern Ross Sea, Antarctica

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 2, February 2025.
Abstract We present a mid‐to‐late Holocene record of relative paleosecular variation from the Ross Sea region of Antarctica. The 6,700‐year‐long record of inclination, declination, and relative paleointensity from a marine sediment core collected near Cape Adare is independently dated using a combination of ramped pyrolysis oxidation and carbonate ...
Olivia J. Truax, Faye Nelson, Christina R. Riesselman, Christian Ohneiser, Jae Il Lee, Kyu‐Cheul Yoo, Bob Dagg, Gary Wilson   +7 more
wiley   +1 more source

Paleomagnetic Imprints of Sulfate Reduction Pathways in Continental Shelf Sediments: Organoclastic Versus Anaerobic Oxidation of Methane

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 12, December 2024.
Abstract Marine continental shelf sediments with high deposition rates may provide useful archives of rapid geomagnetic secular variation as long as the primary magnetization is not altered substantially by diagenesis. To quantify the effects of sulfate (SO42‐) reduction, which is a dominant early diagenetic process in such sediments, on paleomagnetic ...
Yakar Zemach, Ron Shaar, Orit Sivan, Barak Herut, Orit Hyams‐Kaphzan, Oded Katz, Andrew P. Roberts   +6 more
wiley   +1 more source

Bayesian Preprocessing for Palaeomagnetic Sediment Records Using a Flexible Lock‐In Function Approach

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 12, December 2024.
Abstract Geomagnetic field models covering past millennia rely on two main data sources: archaeomagnetic data, that provide snapshots of the geomagnetic field at specific locations, and sediment records, that deliver time series of the geomagnetic field from individual cores.
L. Bohsung, M. Schanner, M. Korte, M. Holschneider   +3 more
wiley   +1 more source

New Late Neolithic (c. 7000–5000 BC) archeointensity data from Syria. Reconstructing 9000years of archeomagnetic field intensity variations in the Middle East

, 2015
International audienceWe present new archeomagnetic intensity data from two Late Neolithic archeological sites (Tell Halula and Tell Masaïkh) in Syria. These data, from 24 groups of potsherds encompassing 15 different time levels, are obtained using the ...
Thébault, Erwan, Genevey, Agnès, Molist Montaña, Miquel, Clop Garcia, Xavier, Gómez Bach, Anna, Le Goff, Maxime, Gallet, Yves, Nachasova, Inga, Robert, Béatrice   +8 more
core   +1 more source

Paleomagnetic Secular Variations in North Greenland Around 81°N Over the Last 6,000 Years

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract We investigate full vector paleomagnetic changes recorded in high‐resolution sediments of Petermann Fjord, North Greenland, deposited over the last 6 kyr, in the context of the recent rapid changes in the geomagnetic field. A Paleomagnetic Secular Variation (PSV) stack (inclination, declination, and relative paleointensity) was reconstructed ...
Juliette Girard, Brendan T. Reilly, Guillaume St‐Onge, France Lagroix, Jean‐Carlos Montero‐Serrano, Joesph S. Stoner, Anne E. Jennings   +6 more
wiley   +1 more source