Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites

Mittlefehldt, David W.

doi:10.1016/j.chemer.2014.08.002

Cited by 154 publications

(193 citation statements)

References 186 publications

(517 reference statements)

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“…However, a lower bound on Vesta's global average [H] (250 µg/g) was determined by the analysis of GRaND data (11), and the howardite meteorites, which are primarily a mixture of basaltic eucrite and diogenite, are thought to be representative of Vesta's regolith (e.g. 46).…”

Section: Comparison Of Vesta Ceres and Models (Fig 2)mentioning

confidence: 99%

“…The response of GRaND was calculated for selected solar system materials, including whole-rock compositions compiled for howardites (40,46), average compositions for carbonaceous-and ordinary-chondrites (23), and dust from Halley's comet (47). In addition, simulated (artificial) materials with variable Fe-content were extrapolated from CM and CI compositions to fill the gap in Fe concentration between CI and Halley's dust (Table S1).…”

Section: Model Compositions Used In Mcnpx Simulationsmentioning

confidence: 99%

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Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy

Prettyman

Yamashita

Toplis

et al. 2017

Science

185

251

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The surface elemental composition of dwarf planet Ceres constrains its regolith ice content, aqueous alteration processes, and interior evolution. Using nuclear spectroscopy data acquired by NASA’s Dawn mission, we determined the concentrations of elemental hydrogen, iron, and potassium on Ceres. The data show that surface materials were processed by the action of water within the interior. The non-icy portion of Ceres’ carbon-bearing regolith contains similar amounts of hydrogen to those present in aqueously altered carbonaceous chondrites; however, the concentration of iron on Ceres is lower than in the aforementioned chondrites. This allows for the possibility that Ceres experienced modest ice-rock fractionation, resulting in differences between surface and bulk composition. At mid-to-high latitudes, the regolith contains high concentrations of hydrogen, consistent with broad expanses of water ice, confirming theoretical predictions that ice can survive for billions of years just beneath the surface.

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Section: Comparison Of Vesta Ceres and Models (Fig 2)mentioning

confidence: 99%

Section: Model Compositions Used In Mcnpx Simulationsmentioning

confidence: 99%

Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy

Prettyman

Yamashita

Toplis

et al. 2017

Science

185

251

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“…Although feldspar has not been observed directly in Dawn and HED spectral data, it is known to be a major phase from HED meteorite studies [8] and is undoubtedly an important component driving Vesta's bulk spectral properties.…”

Section: Feldsparmentioning

confidence: 99%

“…Diogenites are mineralogically diverse but are primarily magnesian orthopyroxene and are thought to have likely cooled deeper within Vesta's crust. Howardites are regolith breccias comprised of a mixture of both eucrite and diogenite fragments [8].…”

Section: Introductionmentioning

confidence: 99%

Using VSWIR microimaging spectroscopy to explore the mineralogical diversity of HED meteorites

Fraeman

Ehlmann

Northwood-Smith

et al. 2016

2016 8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)

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We use VSWIR microimaging spectroscopy to survey the spectral diversity of HED meteorites at 80-µm/pixel spatial scale. Our goal in this work is both to explore the emerging capabilities of microimaging VSWIR spectroscopy and to contribute to understanding the petrologic diversity of the HED suite and the evolution of Vesta. Using a combination of manual and automated hyperspectral classification techniques, we identify four major classes of materials based on VSWIR absorptions that include pyroxene, olivine, Febearing feldspars, and glass-bearing/featureless materials. Results show microimaging spectroscopy is an effective method for rapidly and non-destructively characterizing small compositional variations of meteorite samples and for locating rare phases for possible follow-up investigation. Future work will include incorporating SEM/EDS results to quantify sources of spectral variability and placing observations within a broader geologic framework of the differentiation and evolution of Vesta.

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“…In case of asteroid 4 Vesta, the most likely parent asteroid of the HEDs, this process formed a metallic core, a mafic mantle, and a basaltic crust. This differentiation took place in the very early history of the solar system, and the heat source was short lived 26 Al (e.g., Srinivasan et al 1998, Mittlefehldt et al 1998, Keil 2002, Mittlefehldt 2005, 2014, 2015. The eucrites represent volcanic rocks and are subdivided into cumulate and basaltic, based on their pyroxene and plagioclase major-element compositions (McSween et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Serra Pelada: the first Amazonian Meteorite fall is a Eucrite (basalt) from Asteroid 4-Vesta

Zucolotto

Tosi

Villaça

et al. 2018

An. Acad. Bras. Ciênc.

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Serra Pelada is the newest Brazilian eucrite and the first recovered fall from Amazonia (State of Pará, Brazil, June 29 th 2017). In this paper, we report on its petrography, chemistry, mineralogy and its magnetic properties. Study of four thin sections reveals that the meteorite is brecciated, containing basaltic and gabbroic clasts, as well of recrystallized impact melt, embedded into a fine-medium grained matrix. Chemical analyses suggest that Serra Pelada is a monomict basaltic eucritic breccia, and that the meteorite is a normal member of the HED suite. Our results provide additional geological and compositional information on the lithological diversity of its parent body. The mineralogy of Serra Pelada consists basically of low-Ca pyroxene and high-Ca plagioclase with accessory minerals such as quartz, sulphide (troilite), chromite -ulvöspinel and ilmenite. These data are consistent with the meteorite being an eucrite, a basaltic achondrite and a member of the howardite-eucrite-diogenite (HED) clan of meteorites which most likely are from the crust asteroid 4 Vesta.Key words: Serra Pelada, meteorite, eucrite, Vesta, Brazilian Meteorite.

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Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites

Cited by 154 publications

References 186 publications

Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy

Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy

Using VSWIR microimaging spectroscopy to explore the mineralogical diversity of HED meteorites

Serra Pelada: the first Amazonian Meteorite fall is a Eucrite (basalt) from Asteroid 4-Vesta

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