Orbit News HubEarth’s Magnetic Field Shift: The Mysterious 40-Million-Year-Old Geological Discovery Explained
Ars Technica NewsHave we finally solved mystery of magnetic moon rocks? https://arstechni.ca/pQSk #paleomagnetism #astrophysics #coredynamo #asteroids #magnetism #moonrocks #Science #geology #theMoon
Planetary EcologistPaleointensity (Earth sciences 🌍)
In geomagnetism, paleointensity is the study of changes in the strength of the geomagnetic field over Earth's history. Émile and Odette Thellier were the first to make laboratory measurements to determine the strength of the ancient field responsible for producing remanent magnetization in a rock or archeological artifacts.
https://en.wikipedia.org/wiki/Paleointensity
#Paleointensity #Geomagnetism #EarthSciences #Paleomagnetism
Leonardo UiedaCompGeoLab member Gelson F. Souza Junior gave a talk at the 2024 Castle Meeting at Utrecht, The Netherlands. The talk showed the first results of a significant improvement that we made to our magnetic microscopy inversion method. Read more about it: https://www.compgeolab.org/news/castlemeeting2024.html
#geophysics #microscopy #magnetic #paleomagnetism #EarthScience
Talk on improved magnetic microscopy inversion at the 2024 Castle Meeting | Computer-Oriented Geoscience Lab
Last Thursday, lab member Gelson F. Souza Junior gave a talk at the 2024 Castle Meeting at Utrecht, The Netherlands. The talk showed the first results of a significant improvement that we made to...
💧🌏 Greg CocksResearchers Find Oldest Evidence Of Earth’s Magnetic Field
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https://www.forbes.com/sites/davidbressan/2024/04/29/researchers-find-oldest-evidence-of-earths-magnetic-field/?sh=3443e1c050fb <-- shared media article
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https://doi.org/10.1029/2023JB027706 <-- shared paper
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#geology #geomagnetism #paleomagnetism #earth #global #protection #magneticfield #cosmic #IsuaSupracrustalBelt #fieldwork #metamorphic #structuralgeology #greenland #tectonics #Eoarchean #mineralogy
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https://www.forbes.com/sites/davidbressan/2024/04/29/researchers-find-oldest-evidence-of-earths-magnetic-field/?sh=3443e1c050fb <-- shared media article
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https://doi.org/10.1029/2023JB027706 <-- shared paper
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#geology #geomagnetism #paleomagnetism #earth #global #protection #magneticfield #cosmic #IsuaSupracrustalBelt #fieldwork #metamorphic #structuralgeology #greenland #tectonics #Eoarchean #mineralogy
Knowledge Zone#KnowledgeByte: #Paleomagnetism is the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials.
Here is a short overview.
Matt WillemsenWhy you shouldn’t use magnets when looking for meteorites
A popular tool for identifying meteorites can destroy scientific information
The team’s numerical calculations and experiments with earthly rocks — stand-ins for meteorites — confirmed that bringing a hand magnet close to a rock can rearrange the spins of the rock’s electrons. That rearrangement overwrites the imprint of a previous magnetic field, a process called remagnetization.
https://www.sciencenews.org/article/magnets-meteorites-space #meteorites #magnets #NoNo #paleomagnetism #SusceptibilityMeter
A popular tool for identifying meteorites can destroy scientific information
The team’s numerical calculations and experiments with earthly rocks — stand-ins for meteorites — confirmed that bringing a hand magnet close to a rock can rearrange the spins of the rock’s electrons. That rearrangement overwrites the imprint of a previous magnetic field, a process called remagnetization.
https://www.sciencenews.org/article/magnets-meteorites-space #meteorites #magnets #NoNo #paleomagnetism #SusceptibilityMeter
Dr Leonardo UiedaDon't miss CompGeoLab member Gelson Souza Junior's #EGU23 talk "Full vector inversion of magnetic microscopy data using Euler deconvolution as a priori information" TODAY at 15:05 in Room -2.21 session EMRP3.1.
Gelson will present our initial results from adapting applied geophysics methods to magnetic microscopy data. Find out more at https://www.compgeolab.org/news/egu-2023.html
#geophysics #microscopy #paleomagnetism #earthscience #geology
Doug BostromAn interesting fresh approach.
'Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction'
"We report a large and fast true polar wander (TPW) event that occurred 450–440 million years ago based on palaeomagnetic data from South China and compiled reliable palaeopoles from all major continents. Collectively, a ~50˚ wholesale rotation with maximum continental speeds of ~55 cm yr−1 is demonstrated."
Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction - Nature Communications
Palaeomagnetic data from South China and compiled reliable palaeopoles from 4 other continents reveals a ~50˚ true polar wander (TPW) event occurring 450–440 million years ago. Sweeping Gondwana across the South Pole, this TPW event induced the Ordovician glaciation and mass extinction.