Results 21 to 30 of about 11,238 (241)
Pitted Terrain on Vesta and Implications for the Presence of Volatiles. [PDF]
, 2012 We investigated the origin of unusual pitted terrain on asteroid Vesta, revealed in images from the Dawn spacecraft. Pitted terrain is characterized by irregular rimless depressions found in and around several impact craters, with a distinct morphology
Reddy, V. +44 more
core +1 more source
Properties of chondrules in EL3 chondrites, comparison with EH3 chondrites, and the implications for the formation of enstatite chondrites [PDF]
Meteoritics & Planetary Science, 2002 Abstract— The study of chondrules provides information about processes occurring in the early solar system. In order to ascertain to what extent these processes played a role in determining the properties of the enstatite chondrites, the physical and chemical properties of chondrules from three EL3 chondrites and three EH3 chondrites have been examined
D. M. Schneider +3 more
openaire +1 more source
Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu
The Astrophysical Journal Letters, 2023 Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites.
Laurette Piani +87 more
doaj +1 more source
Extended chronologies of aqueous alteration in the CM2 carbonaceous chondrites: evidence from carbonates in Queen Alexandra Range 93005 [PDF]
, 2012 The Antarctic CM2 carbonaceous chondrite QUE 93005 contains four compositionally distinct carbonates, namely breunnerite, calcite, dolomite and a Ca-poor dolomite. These carbonates can form monomineralic grains, or may be intergrown as bimineralic grains
Alexander, C. +4 more
core +1 more source
Progress in Earth and Planetary Science, 2022 Enstatite chondrites are a small clan of meteorites, only ~ 1% out of all meteorite collection. However, they are the most reduced meteorites and have almost identical isotopic compositions to those of the Earth, suggestive of significant contributions ...
Yangting Lin
doaj +1 more source
Possible Ribose Synthesis in Carbonaceous Planetesimals
Life, 2022 The origin of life might be sparked by the polymerization of the first RNA molecules in Darwinian ponds during wet-dry cycles. The key life-building block ribose was found in carbonaceous chondrites.
Klaus Paschek +7 more
doaj +1 more source
The Planetary Science Journal, 2023 Remote spectral characterization of near-Earth asteroids (NEAs) relies on laboratory spectral calibration to constrain their surface composition, including mineral chemistry and relative mineral abundances.
Bryn Bowen +10 more
doaj +1 more source
Metamorphism of CO and CO-like chondrites and comparisons with type 3 ordinary chondrites [PDF]
, 1991 P(論文)In order to explore their metamorphic history, thermoluminescence data have been obtained for 10 CO or CO-related chondrites from the Antarctic. Six have TL properties indicating low to intermediate levels of metamorphism, while Lewis Cliff 85332 ...
Sears,Derek W. G. +3 more
core +1 more source
Chondrules in Enstatite Chondrites [PDF]
, 2018 23 pages, 4 figures. Submitted manuscript for a chapter in the book "Chondrules and the protoplanetary disc" (editors : S. Russell, H. C. Connolly Jr, A. N. Krot) to be published by Cambridge University Press in 2018. This version is free to view and download for personal use only.
Jacquet, Emmanuel +2 more
openaire +3 more sources
Iron Isotope Constraints on the Structure of the Early Solar System
The Astrophysical Journal Letters, 2023 The recent advent of nontraditional isotopic systems has revealed that meteorites display a fundamental isotopic dichotomy between noncarbonaceous (NC) and carbonaceous (C) groups, which represent material from the inner and outer solar system ...
Yves Marrocchi +2 more
doaj +1 more source