Results 21 to 30 of about 4,898 (235)

Separating Geometry‐ From Stress‐Induced Remanent Magnetization in Magnetite With Ilmenite Lamellae From the Stardalur Basalts, Iceland

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Realistic geometries of magnetite grains from the Stardalur volcano, Iceland, were obtained by Focused Ion Beam Scanning Electron Microscopy nanotomography. These magnetite grains are subdivided by oxidation‐exsolution lamellae of ilmenite.
G. W. terMaat   +3 more
doaj   +1 more source

Rapid, Precise, and High-Sensitivity Acquisition of Paleomagnetic and Rock-Magnetic Data: Development of a Low-Noise Automatic Sample Changing System for Superconducting Rock Magnetometers [PDF]

open access: yes, 2008
Among Earth sciences, paleomagnetism is particularly linked to the statistics of large sample sets as a matter of historical development and logistical necessity.
Baumgartner, Christopher T.   +4 more
core   +2 more sources

Intelligent identification of logging cuttings based on deep learning

open access: yesEnergy Reports, 2022
In oil and gas exploration, rock sample identification is a basic and important work. At present, the methods of rock sample identification mainly include gravity and magnetism, well logging, earthquake, remote sensing, electromagnetism, geochemistry ...
Huijia Wang
doaj   +1 more source

Low-temperature cooling behavior of single-domain magnetite: Forcing of the crystallographic axes and interactions [PDF]

open access: yes, 2006
Low-temperature cycling (LTC) of magnetic remanences carried by rocks has become a standard technique in paleomagnetism, rock magnetism, and environmental magnetism as a means of identifying mineralogy and grain size.
Williams, Wyn
core   +1 more source

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

open access: yes, 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

Measuring, Processing, and Analyzing Hysteresis Data [PDF]

open access: yes, 2018
Magnetic hysteresis loops are important in theoretical and applied rock magnetism with applications to paleointensities, paleoenvironmental analysis, and tectonic studies, among many others.
Heslop, David   +3 more
core   +2 more sources

High-Fidelity Archeointensity Results for the Late Neolithic Period From Central China [PDF]

open access: yes, 2020
Archeomagnetism focuses on exploring high-resolution variations of the geomagnetic field over hundreds to thousands of years. In this study, we carried out a comprehensive study of chronology, absolute and relative paleointensity on a late Neolithic site
Cai, S   +6 more
core   +1 more source

PRELIMINARY PETROMAGNETIC STUDY OF 1849, 1926, 1963, 1968 AND 1974 SURFACE LAVAS FROM BATUR VOLCANO, BALI, INDONESIA: INSIGHT ON THE MAGMATIC PROCESS OF SOURCE AND ROCK MAGNETIC NATURE

open access: yesRudarsko-geološko-naftni Zbornik, 2023
Geochemical and petrographic characterizations were carried out on five episodic effusive eruptions from Batur Volcano on the Island of Bali, Indonesia, and revealed that these lavas are basaltic to andesitic in composition.
Putu Billy Suryanata   +6 more
doaj   +1 more source

Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

open access: yesEarth and Space Science, 2020
Mineral magnetism is proved as a sensitive method of pedogenesis by numerous studies. However, formation pathways of magnetic minerals and subsequent magnetic response are quite different under different climate.
Tingping Ouyang   +5 more
doaj   +1 more source

Rock magnetic and environmental magnetic data of lacustrine sediments from the Heqing basin

open access: yesData in Brief, 2020
This data article associated with the manuscript “Magnetic mineral dissolution recorded in a lacustrine sequence from the Heqing Basin, SW China, and its relationship with changes in the Indian monsoon”.
Xinwen Xu   +3 more
doaj   +1 more source

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