Results 1 to 10 of about 52,439 (271)
Trace element geochemistry of ordinary chondrite chondrules: the type I/type II chondrule dichotomy [PDF]
, 2015 We report trace element concentrations of silicate phases in chondrules from LL3 ordinary chondrites Bishunpur and Semarkona. Results are similar to previously reported data for carbonaceous chondrites, with rare earth element (REE) concentrations ...
Alard, Olivier +2 more
core +4 more sources
Impact-driven oxidation of organics explains chondrite shock metamorphism dichotomy [PDF]
Nature CommunicationsShocked meteorites can be used to probe the dynamics of the early Solar system. Carbonaceous chondrites are less shocked than ordinary chondrites, regardless of the degree of aqueous alteration.
Kosuke Kurosawa +5 more
doaj +2 more sources
An Almahata Sitta EL3 fragment: implications for the complex thermal history of enstatite chondrites [PDF]
Progress in Earth and Planetary Science, 2021 Almahata Sitta is a polymict breccia, consisting of many kinds of clasts. Here we present our mineralogical and petrological results on an EL3 fragment, MS-177 from Almahata Sitta.
M. Kimura +4 more
doaj +2 more sources
Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget [PDF]
Nature CommunicationsThe relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly debated.
Wenzhong Wang +3 more
doaj +2 more sources
South African Journal of Science, 2021 Several dozen stones of an ordinary chondrite meteorite fell in and around the town of Benenitra in southwestern Madagascar during the early evening of 27 July 2018, minutes after a widely observed meteor fireball (bolide) transit and detonation.
Roger L. Gibson +8 more
doaj +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
Stellar Outbursts and Chondrite Composition
The Astrophysical Journal, 2023 The temperatures of observed protoplanetary disks are not sufficiently high to produce the accretion rate needed to form stars, nor are they sufficient to explain the volatile depletion patterns in CM, CO, and CV chondrites and terrestrial planets.
Min Li +5 more
doaj +1 more source
The breakup of the L-chondrite parent body 466 Ma and its terrestrial effects – a search for a mid-Ordovician biodiversity event [PDF]
Estonian Journal of Earth Sciences, 2023 About a third of all meteorites that fall on Earth today, the stony L-chondrites, originate from a major breakup event in the asteroid belt 466 Ma, in the early Darriwilian.
Birger Schmitz, Fredrik Terfelt
doaj +1 more source
Origin of Isotopic Diversity among Carbonaceous Chondrites
The Astrophysical Journal Letters, 2023 Carbonaceous chondrites are some of the most primitive meteorites and derive from planetesimals that formed a few million years after the beginning of the solar system.
Jan L. Hellmann +7 more
doaj +1 more source
Литосфера, 2019 Research subject. This paper reports the results of a series of experiments carried out to study the mineral and geoche mical features of 10 Chelyabinsk meteorite fragments.
V. S. Antipin +3 more
doaj +1 more source