Results 61 to 70 of about 1,324 (171)

Efficiency of Thermoremanent Magnetization Acquisition in Vortex‐State Particle Assemblies

open access: yesGeophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract Magmatic rocks record ambient magnetic fields during cooling, preserving them for billions of years through thermoremanent magnetization (TRM). TRM accuracy depends on particle size, shape, magnetic properties, and the number of particles available to record the field.
U. D. Bellon   +6 more
wiley   +1 more source

C and O stable isotopes and rare earth elements in the Devonian carbonate host rock of the Pivehzhan iron deposit, NE Iran [PDF]

open access: yes, 2018
The Pivehzhan iron deposit is located at about 80km southwest of Mashhad, NE Iran. It occur within the Devonian carbonates as lenticular and massive bodies, as well as veinlets of magnetite and iron sulphides, transformed to goethite and haematite by ...
Calagari, A.A.   +4 more
core   +1 more source

Exploring the origins of magnetization within the Chicxulub crater upper peak ring

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 4, Page 823-848, April 2025.
Abstract Large terrestrial impacts may produce vast subsurface hydrothermal systems, capable of generating conditions favorable to the origin of life. Modeling suggests that these systems may persist for >1 million years for basin‐sized craters; however, direct experimental constraints on hydrothermal system duration are needed.
Christina M. Verhagen   +13 more
wiley   +1 more source

Comparing Wild 2 Particles to Chondrites and IDPS [PDF]

open access: yes, 2008
We compare the observed composition ranges of olivine, pyroxene and Fe-Ni sulfides in Wild 2 grains, comparing these with chondritic IDPs and chondrite classes to explore whether these data suggest affinities to known hydrous materials in particular ...
Akai   +52 more
core   +2 more sources

Iron and copper sulfides in asteroid (162173) Ryugu: Formation conditions and a comparison to the CI and CY chondrites

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 3, Page 506-528, March 2025.
Abstract JAXA's Hayabusa2 sample return mission visited the volatile‐rich carbonaceous (C‐type) asteroid (162173) Ryugu with the aim of ground‐truthing remote observations, returning a pristine sample from a C‐type asteroid, and strengthening links between asteroids and the meteorite collection. Here, we have conducted a systematic study of coarse (>10 
C. S. Harrison   +26 more
wiley   +1 more source

Clay Minerals and Continental‐Scale Remagnetization: A Case Study of South American Neoproterozoic Carbonates

open access: yesJournal of Geophysical Research: Solid Earth, Volume 129, Issue 10, October 2024.
Abstract The Neoproterozoic carbonate rocks of the Araras Group (Amazon Craton) and the Sete‐Lagoas and Salitre Formations (São Francisco Craton) share a statistically indistinguishable single‐polarity (reversed) characteristic direction. This direction is associated with paleomagnetic poles that do not align with the expected directions for primary ...
Ualisson Donardelli Bellon   +5 more
wiley   +1 more source

Diabasic/basaltic shergottites NWA 480/1460 and NWA 5029: magnetic properties indicate launch-pairing. [PDF]

open access: yes, 2016
第2回極域科学シンポジウム/第34回南極隕石シンポジウム 11月17日(木) 国立国語研究所 ...
Funaki M.   +4 more
core   +1 more source

The Aguablanca Ni–(Cu) sulfide deposit, SW Spain: geologic and geochemical controls and the relationship with a midcrustal layered mafic complex [PDF]

open access: yes, 2006
The Aguablanca Ni–(Cu) sulfide deposit is hosted by a breccia pipe within a gabbro–diorite pluton. The deposit probably formed due to the disruption of a partially crystallized layered mafic complex at about 12– 19 km depth and the subsequent ...
A Castro   +106 more
core   +1 more source

Powering the Future by Iron Sulfide Type Material (FexSy) Based Electrochemical Materials for Water Splitting and Energy Storage Applications: A Review

open access: yesSmall, Volume 20, Issue 33, August 15, 2024.
The paper presents a comprehensive overview of iron sulfide (FeS) structures, synthesis methods, and applications. The synthesis methods include high‐temperature chemical synthesis, sonochemical synthesis, hydrothermal synthesis, microwave‐assisted procedures, and biomineralization. The paper also discusses the various FeS‐based nanomaterials and their
Ahmad Farhan   +9 more
wiley   +1 more source

Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite

open access: yesMeteoritics &Planetary Science, Volume 59, Issue 8, Page 2134-2148, August 2024.
Abstract Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of hydrous asteroids. The mechanisms of space weathering, its effects on mineral surfaces, and the characteristic time scales on which alteration occurs are central to understanding the ...
Dennis Harries   +77 more
wiley   +1 more source

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