The Kumtag meteorite strewn field was found in the desert, 132 km south of Hami city Xinjiang province, China. It is an ellipse 2.5 × 7.9 km, with a long axis extending along northeast-southwest direction. largest individual weighs about 10 kg; smallest has mass only 27 g. In total, more than 100 individuals total 180 kg were collected. location and distribution fragments suggest that meteoroid...

In the last 7 years, three meteorites (Blaubeuren, Cloppenburg, and Machtenstein) found in Germany were identified as chondrites. Two of these rocks had been recovered from impact sites decades ago but not considered to be meteorites. The aim this study is fully characterize Based on compositional data silicates, namely olivine low-Ca pyroxene, fit nicely within H-group ordinary brecciated text...

Major element contents of chondrite groups were volatility controlled and established in a nebula after formation of Ca-Al-rich inclusions but before chondrules formed. Elemental abundances in chondrules tend to correlate with chemical affinity. Calcium was fractionated from Al by a planetary, not a nebular process. Chondrules were contemporaneous with igneous activity and aqueous and thermal m...

Introduction: Chondrites are known to contain varying proportions of chondrules, matrix, refractory inclusions and metal. Although trends are known to exist among the chondrite groups (e.g. [1]), their significance has seldom been discussed and no global understanding exists to date concerning the relationship between chondrite groups. Here we show that the relative abundances of the various pe...

Raman spectroscopy was used to investigate insoluble organic matter (IOM) from a range of chondritic meteorites, and a suite of interplanetary dust particles (IDPs). Three monochromatic excitation wavelengths (473 nm, 514 nm, 632 nm) were applied sequentially to assess variations in meteorite and IDP Raman peak parameters (carbon D and G bands) as a function of excitation wavelength (i.e., disp...

The Cavezzo meteorite, which fell on January 1, 2020, is the first meteorite detected and recovered by Italian PRISMA Fireball Network. Two specimens, weighing 3.12 g (specimen 1) 52.19 2), were collected 3 days after bolide was observed, thanks to an effective media campaign that encouraged involvement of local people. two specimens this have not only completely different lithological characte...

Abstract We investigated the hydrogen isotopic compositions and water contents of pyroxenes in two recent ordinary chondrite falls, namely, Chelyabinsk (2013 fall) Benenitra (2018 fall), compared them to three Antarctic finds, Graves Nunataks GRA 06179, Larkman Nunatak LAR 12241, Dominion Range DOM 10035. The pyroxene minerals are hydrated (?0.018–0.087 wt.% H 2 O) show D-poor signatures ( ? D ...

Bulk chondritic meteorites and terrestrial planets show a monotonic depletion in moderately volatile and volatile elements relative to the Sun's photosphere and CI carbonaceous chondrites. Although volatile depletion was the most fundamental chemical process affecting the inner solar nebula, debate continues as to its cause. Carbonaceous chondrites are the most primitive rocks available to us, ...

The mineralogy and geochemistry of Ceres, as constrained by Dawn’s instruments, are broadly consistent with a carbonaceous chondrite (CM/CI) bulk composition. Differences explainable by Ceres’s more advanced alteration include the formation of Mgrich serpentine and ammoniated clay; a greater proportion of carbonate and lesser organic matter; amounts of magnetite, sulfide, and carbon that could ...

A metamorphosed lithic clast was discovered in the CM chondrite Grove Mountains 021536, which was collected in the Antarctica by the Chinese Antarctic Research Exploration team. The lithic clast is composed mainly of Fe-rich olivine (Fo62) with minor diopside (Fs9.7–11.1Wo48.3–51.6), plagioclase (An43–46.5), nepheline, merrillite, Al-rich chromite (21.8 wt% Al2O3; 4.43 wt% TiO2), and pentlandit...