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PES pallasite meteorite

A meteorite classification type
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Name:
The acronym PES was proposed by Wasson and Choi (2003) in substitution of the previously used EST and ESP.
A grouplet named for a pallasite that was found near Eagle Station, Kentucky, in 1880. They all contain highly fragmented olivines, intermixed with small, irregular olivine splinters, in a nickel-iron matrix. Although their mineral assemblage is similar to PMG pallasites, they have different metal and olivine (forsterite) compositions. In fact, the mean Ni content of the metal is higher, and olivine Fa contents are slightly higher (≈Fa20) than those in the Zaisho (Fa18.3), which has the highest Fa among PMG. The O-isotope composition of their olivine (forsterite) is a main parameter to separate the Eagle-Station pallasites (PES) and main-group pallasites (PMG). The mean PMG ∆17O (=δ17O-0.52·δ18O) value is -0.28 ± 0.06‰. The mean PES ∆17O value is much lower, ≈-4.6‰.

Meteoritical Society Code: Pallasite, PES



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Unique IdentifiersHide

Mindat ID:
49902
Long-form identifier:
mindat:1:1:49902:4

Classification of PES pallasite meteoriteHide

Mineralogy of PES pallasite meteoriteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Meteoritic IronIron found as a constituent of meteorites.
Olivine > ForsteriteMg2(SiO4)
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
ChromiteFe2+Cr3+2O4
Schreibersite(Fe,Ni)3P
TroiliteFeS

Synonyms of PES pallasite meteoriteHide

Internet Links for PES pallasite meteoriteHide

References for PES pallasite meteoriteHide

Recorded finds for PES pallasite meteoriteHide

This map shows a selection of recorded finds that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA
 
  • Kentucky
    • Carroll County
- (2010)
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