Terrestrial modification of the Ivuna meteorite and a reassessment of the chemical composition of the CI type specimen

King, A. J.; Phillips, K. J. H.; Strekopytov, Stanislav; Vita‐Finzi, Claudio; Russell, S. S.

doi:10.1016/j.gca.2019.09.041

Cited by 41 publications

(38 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sulfate evaporites may be expected to form by terrestrial alteration of CM falls because these minerals are abundant in CI falls including Orgueil (fell 1864) and Ivuna (fell 1938; Gounelle and Zolensky 2001; King et al. 2020). In addition, CM finds are susceptible to evaporite formation during Antarctic weathering (Velbel 1988).…”

Section: Evidence For Terrestrial Alteration Of CM Fallsmentioning

confidence: 99%

“…They could have appeared within 2 weeks of the fall of Orgueil (Gounelle and Zolensky 2001), and King et al. (2020) found that epsomite/blödite had developed on a polished sample of Ivuna in less than 6 years.…”

Section: Evidence For Terrestrial Alteration Of CM Fallsmentioning

confidence: 99%

“…For example, King et al. (2020) found that terrestrial evaporites were abundant in the CI carbonaceous chondrite Ivuna despite being stored in a nitrogen atmosphere for at least 10 years prior to analysis. Previous work on ordinary chondrites has shown that Fe metal is significantly altered when stored under ambient conditions over decadal timescales (e.g., Lee and Bland 2004).…”

Section: Implications For Collection and Curationmentioning

confidence: 99%

“…The damaging effects of terrestrial exposure are highlighted by several CI carbonaceous chondrite falls that are encrusted by terrestrial evaporites (Gounelle and Zolensky 2001; King et al. 2020).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

CM carbonaceous chondrite falls and their terrestrial alteration

Lee

Daly

Floyd

et al. 2021

Meteorit & Planetary Scien

View full text Add to dashboard Cite

The CM carbonaceous chondrites provide unique insights into the composition of the protoplanetary disk, and the accretion and geological history of their parent C‐complex asteroid(s). Of the hundreds of CMs that are available for study, the majority are finds and so may have been compromised by terrestrial weathering. Nineteen falls have been recovered between 1838 and 2020, and there is a hint of two temporal clusters: 1930–1942 and 2009–2020. Falls are considered preferable to finds to study because they should be near pristine, and here this assumption is tested by investigating their susceptibility to alteration before recovery and during curation. CMs falling on the land surface are prone to contamination by organic compounds from soil and vegetation. Where exposed to liquid water prior to collection, minerals including oldhamite can be dissolved and most fluid mobile elements leached. Within days of recovery, CMs adsorb water from the atmosphere and are commonly contaminated by airborne hydrocarbons. Interaction with atmospheric water and oxygen during curation over year to decadal timescales can produce Fe‐oxyhydroxides from Fe,Ni metal and gypsum from indigenous gypsum and oldhamite. Relationships between the petrologic (sub)types of pre‐1970 falls and their terrestrial age could be due to extensive but cryptic alteration during curation, but are more likely a sampling bias. The terrestrial history of a CM fall, including circumstances of its collection and conditions of its curation, must be taken into account before it is used to infer processes on C‐complex parent bodies such as Ryugu and Bennu.

show abstract

Section: Evidence For Terrestrial Alteration Of CM Fallsmentioning

confidence: 99%

Section: Evidence For Terrestrial Alteration Of CM Fallsmentioning

confidence: 99%

Section: Implications For Collection and Curationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CM carbonaceous chondrite falls and their terrestrial alteration

Lee

Daly

Floyd

et al. 2021

Meteorit & Planetary Scien

View full text Add to dashboard Cite

show abstract

“…Most of the studies of meteorite weathering have dealt with mineralogy and major element geochemistry (Bland et al, 2006;Golden et al, 1995;Gooding, 1982;King et al, 2020;Velbel et al, 1991). A few studies also have focused on particular trace J o u r n a l P r e -p r o o f Journal Pre-proof elements such as Ba, Sr, and REE (Al-Kathiri et al, 2005;Crozaz et al, 2003;Pourkhorsandi et al, 2017a;Shimizu et al, 1983;Stelzner et al, 1999;Zurfluh et al, 2011).…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

The effects of terrestrial weathering on samarium‑neodymium isotopic composition of ordinary chondrites

et al. 2021

View full text Add to dashboard Cite

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract