Results 21 to 30 of about 2,212 (217)

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

Eruptive timing and 200 year episodicity at 92°W on the hot spot‐influenced Galapagos Spreading Center derived from geomagnetic paleointensity

Geochemistry, Geophysics, Geosystems, 2014
Eruptive timing in mid‐ocean ridge systems is relatively poorly constrained, despite being an important variable in our understanding of many mid‐ocean ridge processes, including volcanic construction; magma recharge, flux, and storage; and the stability
Julie A. Bowles, Alice Colman, J. Timothy McClinton, John M. Sinton, Scott M. White, Kenna H. Rubin   +5 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

New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii

Earth, Planets and Space, 2021
Thellier-type paleointensity experiments associated with partial thermal remanent magnetization checks have been widely used to determine paleointensity values from volcanic and archaeological media.
Doohee Jeong, Qingsong Liu, Yuhji Yamamoto, Yongjae Yu, Xiang Zhao, Huafeng Qin   +5 more
doaj   +1 more source

Investigating the utility of a high-temperature Thellier-style paleointensity experimental protocol

Earth, Planets and Space, 2021
High-quality data are vital to the research field of paleointensity, which has long suffered from poor-quality and/or sparse data. Previous paleointensity work has established that repeatedly heating specimens increases the opportunity for thermochemical
J. Michael Grappone, James M. Russell, Andrew J. Biggin   +2 more
doaj   +1 more source

Paleointensity database updated [PDF]

Eos, Transactions American Geophysical Union, 1998
The updated version of the paleointensity database will be included in the new package that should be released by Mike McElhinny in May 1998. The new version comprises 1692 data records from 115 references. The database tables are also available as ASCII and Excel files via an anonymous ftp site (ftp.dstu.
Mereille Perrin, Elisabeth Schnepp, Valera Shcherbakov   +2 more
openaire   +1 more source

Paleointensities on 8 ka obsidian from Mayor Island, New Zealand [PDF]

Solid Earth, 2011
The 8 ka BP (6050 BCE) pantelleritic obsidian flow on Mayor Island, Bay of Plenty, New Zealand, has been investigated using 30 samples from two sites.
A. Ferk, R. Leonhardt, K.-U. Hess, D. B. Dingwell   +3 more
doaj   +1 more source

Behavior of paleointensity during the Paleogene [PDF]

Physics of the Earth and Planetary Interiors, 2014
Abstract Behavior of the intensity of geomagnetic field in the Paleogene was studied by the analysis of the sedimentary rocks of the Russian Plate. It is revealed that in the beginning of the Paleogene the variations of little-amplitude paleointensity (about 0.5 H 0 , where H 0 is the value of modern geomagnetic field taken as 40 μT) were ...
A.Yu. Kurazhkovskii, N.A. Kurazhkovskaya, B.I. Klain   +2 more
openaire   +1 more source

The Cretaceous Normal Superchron: A Mini-Review of Its Discovery, Short Reversal Events, Paleointensity, Paleosecular Variations, Paleoenvironment, Volcanism, and Mechanism

Frontiers in Earth Science, 2022
The Cretaceous Normal Superchron (CNS) was first defined in the 1960s to explain the Cretaceous Quiet Zone in marine magnetic anomaly profiles, which includes no or fewer geomagnetic reversals.
Yutaka Yoshimura
doaj   +1 more source

Comparison of Thermal and Microwave Paleointensity Estimates in Specimens Displaying Non‐Ideal Behavior in Thellier‐Style Paleointensity Experiments [PDF]

, 2020
Determining the strength of the ancient geomagnetic field is vital to our understanding of the core and geodynamo but obtaining reliable measurements of the paleointensity is fraught with difficulties.
Courtney J. Sprain, Hill, Mimi J., Sprain, Courtney J., Thomas J. Barrett, Biggin, Andrew J., J. Michael Grappone, Grappone, J. Michael, Andrew J. Biggin, Barrett, Thomas J., Mimi J. Hill, Grappone, J Michael, Barrett, Thomas J, Biggin, Andrew J, Hill, Mimi J, Sprain, Courtney J   +14 more
core   +1 more source