Results 21 to 30 of about 3,470 (247)

The Culprit of Bias for Paleointensity Estimation in the Shaw‐Type Protocol and an Innovative Calculation Method

Geophysical Research Letters
Paleointensity records are vital for understanding the Earth's evolution, but obtaining accurate paleointensity is a challenging task. The Shaw‐type method, a widely‐used paleointensity protocol, produces biased results occasionally despite strict ...
Kaixian Qi, Shuhui Cai, Huafeng Qin, Yuhji Yamamoto, Chenglong Deng, Yongxin Pan, Xin Cheng, Hanning Wu, Rixiang Zhu   +8 more
doaj   +2 more sources

A brief review of single silicate crystal paleointensity: rock-magnetic characteristics, mineralogical backgrounds, methods and applications

Earth, Planets and Space
Single silicate crystals hosting tiny magnetic inclusions are remarkable targets to study the paleointensities of the Earth and extraterrestrial samples. Since the pioneering work done in late 1990s, paleointensity studies using various silicate minerals
Chie Kato, Yoichi Usui, Masahiko Sato
doaj   +2 more sources

Understanding Nonideal Paleointensity Recording in Igneous Rocks: Insights From Aging Experiments on Lava Samples and the Causes and Consequences of “Fragile” Curvature in Arai Plots

Geochemistry, Geophysics, Geosystems, 2021
The theory for recording of thermally blocked remanences predicts a quasilinear relationship between low fields like the Earth's in which rocks cool and acquire a magnetization.
L. Tauxe, C.N. Santos, B. Cych, X. Zhao, A.P. Roberts, L. Nagy, W. Williams   +6 more
doaj   +2 more sources

New Paleointensity Data Suggest Possible Phanerozoic‐Type Paleomagnetic Variations in the Precambrian

Geochemistry, Geophysics, Geosystems, 2021
The state of the geomagnetic field throughout the Precambrian era is largely unknown. Approximately 8% of global paleointensity records account for ∼4 billion years of Earth history.
Simon J. Lloyd, Andrew J. Biggin, Zheng‐Xiang Li   +2 more
doaj   +2 more sources

A multimethod paleointensity approach applied to the historical Xitle lava flows (Central Mexico): towards the accurate paleointensity determination

Earth, Planets and Space, 2020
An inclusive rock-magnetic and absolute paleointensity survey of the ~ 2-ka-old Xitle volcano (southerly Basin of Mexico) was undertaken to assess the faithfulness of the paleomagnetic log carried by fresh, widely exposed and well-preserved lava flows ...
Juan Morales, Nayeli Pérez-Rodríguez, Avto Goguitchaichvili, Miguel Cervantes-Solano   +3 more
doaj   +2 more sources

Age constraints on island-arc submarine basalts from geomagnetic paleointensity

Earth, Planets and Space
High-resolution dating of volcanic rocks is the foundation for understanding the evolution of volcanoes and for estimating possible hazards. However, dating is often difficult for submarine volcanoes, where radiocarbon or other dating is frequently ...
Yoichi Usui, Iona McIntosh, Osamu Ishizuka   +2 more
doaj   +2 more sources

Determining Magnetic Field Intensity and Direction From the Anisotropy of Magnetic Remanence in Sediments

Geochemistry, Geophysics, Geosystems
Anisotropy of magnetic remanence (AMR) holds promise for quantifying relative paleointensity values from sedimentary rocks. A proof of concept was established for applied fields that exceeded the intensity of the geomagnetic field.
Felix K. Ostermeier, Stuart A. Gilder, Michael R. Wack, Josef Ježek, Kuang He, David Finn   +5 more
doaj   +2 more sources

Comparison and Renormalization of Holocene Paleointensity Records From Central North America (17°N–51°N, 205°E–295°E)

Earth and Space Science, 2021
This paper develops a composite absolute paleointensity record for Holocene paleomagnetic secular variation (PSV) from central North America. Twelve full‐vector (inclination, declination, paleointensity) PSV records were assessed in order to build the ...
Steve P. Lund, Marci Richardson, Ken Verosub, John King, Duane Champion, Guillame St‐Onge   +5 more
doaj   +1 more source

Using Preisach Theory to Evaluate Chemical Remanent Magnetization and Its Behavior During Thellier‐Thellier‐Coe Paleointensity Experiments

Journal of Geophysical Research: Solid Earth, 2023
The behavior of grain‐growth chemical remanent magnetizations (gCRM) are investigated for different coercivity and magnetostatic‐interaction‐field distributions and acquisition conditions using a thermally activated Preisach model for assemblages of ...
Evelyn B. Baker, A. Muxworthy
semanticscholar   +1 more source

Difference in Relative Paleointensity Recording Efficiency of Magnetic Mineral Constituents in a Sediment Core Off Chile

Journal of Geophysical Research: Solid Earth, 2023
Progress of relative paleointensity (RPI) estimations using marine sediments has greatly contributed to better understanding of the behavior of the past geomagnetic field.
T. Yamazaki, Jiaxi Li, Takaya Shimono, T. Kanamatsu   +3 more
semanticscholar   +1 more source