Results 31 to 40 of about 5,269 (213)
Parauapebas meteorite from Pará, Brazil, a “hammer” breccia chondrite
Brazilian Journal of Geology, 2020 The Parauapebas meteorite, third official meteorite discovered in the Brazilian Amazon region, is a “hammer meteorite” which fell on December 9th, 2013, in the city of Parauapebas, Pará State, Brazil.
Daniel Atencio +5 more
doaj +1 more source
Modeling Chondrule Dust Rim Growth with Ellipsoidal Monomers
The Astrophysical Journal, 2023 Fine-grained dust rims (FGRs) surrounding chondrules in carbonaceous chondrites encode important information about early processes in the solar nebula.
C. Xiang +3 more
doaj +1 more source
Chondrule Formation in Bow Shocks around Eccentric Planetary Embryos
, 2012 Recent isotopic studies of Martian meteorites by Dauphas & Pourmond (2011) have established that large (~ 3000 km radius) planetary embryos existed in the solar nebula at the same time that chondrules - millimeter-sized igneous inclusions found in ...
Athanassiadou, Themis +3 more
core +1 more source
Spinel in CV chondrules: Investigating precursor legacy and chondrule thermal histories
Meteoritics & Planetary Science, 2022 AbstractIn carbonaceous chondrites, Mg‐spinel (MgAl2O4) grains are ubiquitous in refractory inclusions but rarely reported in chondrules, where they may correspond to minerals either (i) inherited from chondrule precursors or (ii) crystallized from chondrule melts. Here, we report high‐current quantitative electron microprobe measurements and secondary
Nicolas Schnuriger +5 more
openaire +2 more sources
Structure of the chondrules and the chemical composition of olivine in meteorite Jesenice
Geologija, 2013 This paper presents a mineralogical analysis of various chondrule types and chemical analysis of olivine indifferent parts of meteorite Jesenice. Quantitative energy-dispersive X-ray spectroscopy with a scanning electronmicroscope was used in the ...
Bojan Ambrožič +3 more
doaj +1 more source
The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments
Applied Sciences, 2022 In this paper, several researches were undertaken related to a violent phenomenon, characterized by a sonic boom, felt on an area of at least 500 km2, shortly followed by the fall of rock fragments that were then recovered from the ground.
Alexandru Cocean +7 more
doaj +1 more source
Magnetic Fields Recorded by Chondrules Formed in Nebular Shocks
, 2018 Recent laboratory efforts (Fu et al., 2014) have constrained the remanent magnetizations of chondrules and the magnetic field strengths at which the chondrules were exposed to as they cooled below their Curie points.
Boley, Aaron C. +3 more
core +1 more source
, 2009 It has been suggested that shock waves in the solar nebula formed the high temperature materials observed in meteorites and comets. It is shown that the temperatures at the inner rim of the solar nebula could have been high enough over a sufficient ...
Bouwman +14 more
core +1 more source
Microspherules Formed by Lightning Strikes
Meteoritics &Planetary Science, EarlyView.Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley +1 more source
Chondrule Destruction via Dust Collisions in Shock Waves
The Astrophysical JournalA leading candidate for the heating source of chondrules and igneous rims is shock waves. This mechanism generates high relative velocities between chondrules and dust particles.
Yuji Matsumoto +2 more
doaj +1 more source