Results 21 to 30 of about 33,638 (237)

The Okhansk Meteorite: Specifics of Composition, Structure, and Genesis [PDF]

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2016
The Okhansk meteorite fell on August 18, 1887 near the village of Tabor, about 15 km away from the town of Okhansk in Perm province and weighed 186.5 kg (the total weight of collected fragments, according to P.I. Krotov, was more than 245 kg).
A.I. Bakhtin   +3 more
doaj  

Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

open access: yesMeteoritics and Planetary Science, 2019
Tochilinite/cronstedtite intergrowths are commonly observed as alteration products in CM chondrite matrices, but the conditions under which they formed are still largely underconstrained due to their scarcity in terrestrial environments.
L. Vacher   +5 more
semanticscholar   +1 more source

Stellar Outbursts and Chondrite Composition

open access: yesThe 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

Clays and the Origin of Life: The Experiments

open access: yesLife, 2022
There are three groups of scientists dominating the search for the origin of life: the organic chemists (the Soup), the molecular biologists (RNA world), and the inorganic chemists (metabolism and transient-state metal ions), all of which have ...
Jacob Teunis (Theo) Kloprogge   +1 more
doaj   +1 more source

Refractory inclusions in carbonaceous chondrites: Records of early solar system processes

open access: yesMeteoritics and Planetary Science, 2019
Chondrites consist of three major components: refractory inclusions (Ca,Al‐rich inclusions [CAIs] and amoeboid olivine aggregates), chondrules, and matrix.
A. Krot
semanticscholar   +1 more source

Linking mineralogy and spectroscopy of highly aqueously altered CM and CI carbonaceous chondrites in preparation for primitive asteroid sample return

open access: yesMeteoritics and Planetary Science, 2019
The highly hydrated, petrologic type 1 CM and CI carbonaceous chondrites likely derived from primitive, water‐rich asteroids, two of which are the targets for JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions.
H. Bates   +4 more
semanticscholar   +1 more source

Reduced and unstratified crust in CV chondrite parent body

open access: yesNature Communications, 2017
Meteorites may unlock the history of the early solar system. Here, the authors find, through Ca-Fe-rich secondary phases, that the distinction between reduced and oxidized CV chondrites is invalid; therefore, CV3 chondrites are asteroid fragments that ...
Clément Ganino, Guy Libourel
doaj   +1 more source

Organic and volatile elements in the solar system

open access: yesEPJ Web of Conferences, 2012
Chondrites and comets have accreted primitive materials from the early solar system. Those materials include organics, water and other volatile components.
Remusat L.
doaj   +1 more source

The Oxygen Isotopic Composition of Samples Returned from Asteroid Ryugu with Implications for the Nature of the Parent Planetesimal

open access: yesThe Planetary Science Journal, 2023
We present oxygen isotopic analyses of fragments of the near-Earth C _b -type asteroid Ryugu returned by the Hayabusa2 spacecraft that reinforce the close correspondence between Ryugu and CI chondrites.
Haolan Tang   +89 more
doaj   +1 more source

“CY1” Chondrites Produced by Impact Dehydration of the CI Chondrite Parent Body

open access: yesThe Astrophysical Journal Letters
The recently proposed Yamato-type (CY) chondrites share significant similarities with CI chondrites and Ryugu. We present major and trace elemental, Re–Os, and mass-independent Ti, Cr, and Fe isotope data for seven CY chondrites. The elemental data along
Ke Zhu   +6 more
doaj   +1 more source

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