Results 41 to 50 of about 5,656 (205)
Statistical tests of chondrule sorting [PDF]
Meteoritics & Planetary Science, 2010 Abstract–The variation in sizes of chondrules from one chondrite to the next is thought to be due to some sorting process in the early solar nebula. Hypotheses for the sorting process include chondrule sorting by mass and sorting by some aerodynamic mechanism; one such aerodynamic mechanism is the process of turbulent concentration (TC). We present the
Teitler, Seth A. +3 more
openaire +3 more sources
Geochimica et Cosmochimica Acta, 2019 Al-Mg isotope systematics of twelve FeO-poor (type I) chondrules from CR chondrites Queen Alexandra Range 99177 and Meteorite Hills 00426 were investigated by secondary ion mass spectrometry (SIMS). Five chondrules with Mg#'s of 99.0 to 99.2 and Δ17O of -
T. Tenner +6 more
semanticscholar +1 more source
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
PHOTOPHORETIC STRENGTH ON CHONDRULES. 2. EXPERIMENT [PDF]
The Astrophysical Journal, 2014 Photophoretic motion can transport illuminated particles in protoplanetary disks. In a previous paper we focused on the modeling of steady state photophoretic forces based on the compositions derived from tomography and heat transfer. Here, we present microgravity experiments which deviate significantly from the steady state calculations of the first ...
Loesche, Christoph +5 more
openaire +3 more sources
Acta geographica ac geologica et meteorologica Debrecina. Geologia, geomorfologia, termeszetfoldrajz sorozat, 2019 We report on the mineralogy, petrography, and oxygen isotopic compositions of primary olivine and plagioclase/feldspathic mesostases in chondrules and of secondary magnetite and fayalite in chondrules and matrix of an oxidized Bali-like CV3.1 ...
A. Krot +3 more
semanticscholar +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
Chromium Isotopic Evidence for an Early Formation of Chondrules from the Ornans CO Chondrite
Astrophysical Journal, 2019 Chondrules are the main components of primitive meteorites and possibly the building blocks of planetary embryos and terrestrial planets. However, their ages and modes of formation are still highly debated. Here, we present high-precision Cr isotope data
K. Zhu 朱 +5 more
semanticscholar +1 more source
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