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Eagle Station meteorite, Carroll County, Kentucky, USAi
Regional Level Types
Eagle Station meteoriteMeteorite Fall Location
Carroll CountyCounty
KentuckyState
USACountry

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Latitude & Longitude (WGS84):
38° 37' North , 84° 58' West
Latitude & Longitude (decimal):
38.61667,-84.96667
GeoHash:
G#: dngedtcnm
GRN:
N26W48
Type:
Meteorite Fall Location
Meteorite Class:
PES pallasite meteorite
Meteoritical Society Class:
Pallasite, PES
Metbull:
View entry in Meteoritical Bulletin Database
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Sanders236 (2017)4.6km
Sparta266 (2017)8.5km
Worthville184 (2017)8.8km
Bromley776 (2006)10.6km
Owenton1,550 (2017)13.9km
Mindat Locality ID:
27780
Long-form identifier:
mindat:1:2:27780:9
GUID (UUID V4):
0


Pallasite, PES
Find 1880, 36.3 kg

Found just over a kilometer from the town of Eagle Station, the Eagle Station meteorite is a Pallasite, but a very unusual one. Apparently, scientists are not the only ones to appreciate Eagle Station's unusual characteristics. Fragments from the same meteorite were apparently buried in the Turner Mounds of the Little Miami Valley in southern Ohio.

Like all Pallasites the Eagle Station Pallasite's primary constituents are olivine (~78 vol%) and Fe-Ni metal(~21vol%). The olivine (Fa20) is, however, richer in iron than most Pallasites, the 'main group' Pallasites. And, its Fe-Ni metal is richer in nickel (15.37% Ni) than the 'main group' Pallasites. Even more important, its oxygen isotope ratios differ so much from the Main Group Pallasites that to most geochemists and meteoriticists it seems almost inconceivable that the Eagle Station Pallasite (and 3 similar Pallasites) would be derived from the same original homeworld. So, in fact, Eagle Station is the prototype for the 'Eagle Station grouplet' [PES = Pallasite, Eagle Station (subtype)]. In addition to the olivine and metal, Eagle Station also has very minor amounts of orthopyroxene, Ca-rich clinopyroxene, sulfates, troilite, and schreibersite. These constituents are not that unusual, but the minor minerals also have additional variations in trace elements which further differentiate the PES Pallasites from the Main Group.

Eagle Station is one of 25 Kentucky meteorites discovered before 2014. The only other Kentucky Pallasite, Mount Vernon, is a Main Group Pallasite. The main mass of the meteorite is held in the Naturhistorisches Museum in Wiens (Vienna)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ 'Clinopyroxene Subgroup'
Description: Clinopyroxene Ca-rich (Wo45Fs7) in at least one instance.
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ 'Fayalite-Forsterite Series'
Description: Olivine (Fa19Fo80)in Mittlefehldt et al., (1998). Olivine (Fa20) according to Grady (2000). Olivine accounts for 75-80% of the silicate inventory.
ⓘ Forsterite
Formula: Mg2SiO4
ⓘ Merrillite
Formula: Ca9NaMg(PO4)7
ⓘ Native Iron
Formula: Fe
ⓘ Native Iron var. Kamacite
Formula: (Fe,Ni)
ⓘ 'Orthopyroxene Subgroup'
ⓘ 'Plessite'
ⓘ Schreibersite
Formula: (Fe,Ni)3P
Description: Quite minor
ⓘ Stanfieldite
Formula: Ca4Mg5(PO4)6
ⓘ Taenite
Formula: (Fe,Ni)
ⓘ Troilite
Formula: FeS
ⓘ Whitlockite
Formula: Ca9Mg(PO4)6(PO3OH)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Iron1.AE.05Fe
ⓘvar. Kamacite1.AE.05(Fe,Ni)
ⓘTaenite1.AE.10(Fe,Ni)
ⓘSchreibersite1.BD.05(Fe,Ni)3P
Group 2 - Sulphides and Sulfosalts
ⓘTroilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
Group 8 - Phosphates, Arsenates and Vanadates
ⓘWhitlockite8.AC.45Ca9Mg(PO4)6(PO3OH)
ⓘMerrillite8.AC.45Ca9NaMg(PO4)7
ⓘStanfieldite8.AC.70Ca4Mg5(PO4)6
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘDiopside9.DA.15CaMgSi2O6
Unclassified
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plessite'-
ⓘ'Orthopyroxene Subgroup'-

List of minerals for each chemical element

HHydrogen
Hⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
OOxygen
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ DiopsideCaMgSi2O6
Oⓘ EnstatiteMg2Si2O6
Oⓘ ForsteriteMg2SiO4
Oⓘ StanfielditeCa4Mg5(PO4)6
Oⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Oⓘ MerrilliteCa9NaMg(PO4)7
Oⓘ Fayalite-Forsterite Series
NaSodium
Naⓘ MerrilliteCa9NaMg(PO4)7
MgMagnesium
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ ForsteriteMg2SiO4
Mgⓘ StanfielditeCa4Mg5(PO4)6
Mgⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Mgⓘ MerrilliteCa9NaMg(PO4)7
Mgⓘ Fayalite-Forsterite Series
SiSilicon
Siⓘ DiopsideCaMgSi2O6
Siⓘ EnstatiteMg2Si2O6
Siⓘ ForsteriteMg2SiO4
Siⓘ Fayalite-Forsterite Series
PPhosphorus
Pⓘ Schreibersite(Fe,Ni)3P
Pⓘ StanfielditeCa4Mg5(PO4)6
Pⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Pⓘ MerrilliteCa9NaMg(PO4)7
SSulfur
Sⓘ TroiliteFeS
CaCalcium
Caⓘ DiopsideCaMgSi2O6
Caⓘ StanfielditeCa4Mg5(PO4)6
Caⓘ WhitlockiteCa9Mg(PO4)6(PO3OH)
Caⓘ MerrilliteCa9NaMg(PO4)7
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ Native IronFe
Feⓘ Native Iron var. Kamacite(Fe,Ni)
Feⓘ Schreibersite(Fe,Ni)3P
Feⓘ Taenite(Fe,Ni)
Feⓘ TroiliteFeS
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ Native Iron var. Kamacite(Fe,Ni)
Niⓘ Schreibersite(Fe,Ni)3P
Niⓘ Taenite(Fe,Ni)

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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References

Farrington, O.C., 1915, Catalogue of the meteorites of North America to January 1, 1909: National Academy of Sciences, Memoir 13, 513 pages.
Mason, B. (1962) The Pallasites: American Museum Novitates, #2163. 19 pages . (Dec 1963)
Bunch, T. E., Keil, Klaus (1971) Chromite and ilmenite in non-chondritic meteorites. American Mineralogist, 56 (1-2) 146-157
Buseck, Peter R., Holdsworth, Edward (1977) Phosphate minerals in pallasite meteorites. Mineralogical Magazine, 41 (317) 91-102 doi:10.1180/minmag.1977.041.317.14
Buseck, Peter R (1977) Pallasite meteorites—mineralogy, petrology and geochemistry. Geochimica et Cosmochimica Acta, 41 (6) 711-740 doi:10.1016/0016-7037(77)90044-8
Davis, A. M., & Olsen, E. J. (1989, March). The origin of phosphate minerals in the Eagle Station and Springwater pallasites. In Lunar and Planetary Science Conference (Vol. 20, p. 220).
Mittlefehldt, D.W., McCoy, T.J., Goodrich, C.A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. IN: Papike, J. J. (ed.): Planetary Materials: Mineralogical Society of America, Washington. 195 pages.
Grady, Monica (2000) Catalogue of Meteorites (5th ed.). Cambridge University Press.
www.lpi.usra.edu (2010) http://www.lpi.usra.edu/meteor/metbull.php
kgs.uky.edu (n.d.) http://kgs.uky.edu/kgsweb/olops/pub/kgs/sp01_12.pdf
www.minersoc.org (n.d.) http://www.minersoc.org/pages/Archive-MM/Volume_41/41-317-91.pdf
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