Eagle Station meteorite, Carroll County, Kentucky, USAi
| Regional Level Types | |
|---|---|
| Eagle Station meteorite | Meteorite Fall Location |
| Carroll County | County |
| Kentucky | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 37' North , 84° 58' West
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sanders | 236 (2017) | 4.6km |
| Sparta | 266 (2017) | 8.5km |
| Worthville | 184 (2017) | 8.8km |
| Bromley | 776 (2006) | 10.6km |
| Owenton | 1,550 (2017) | 13.9km |
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 ElementsMineral 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 DiagramDetailed 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. References: |
| ⓘ 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 References: |
| ⓘ Stanfieldite Formula: Ca4Mg5(PO4)6 References: |
| ⓘ Taenite Formula: (Fe,Ni) |
| ⓘ Troilite Formula: FeS References: |
| ⓘ Whitlockite Formula: Ca9Mg(PO4)6(PO3OH) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Iron | 1.AE.05 | Fe |
| ⓘ | var. Kamacite | 1.AE.05 | (Fe,Ni) |
| ⓘ | Taenite | 1.AE.10 | (Fe,Ni) |
| ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Whitlockite | 8.AC.45 | Ca9Mg(PO4)6(PO3OH) |
| ⓘ | Merrillite | 8.AC.45 | Ca9NaMg(PO4)7 |
| ⓘ | Stanfieldite | 8.AC.70 | Ca4Mg5(PO4)6 |
| Group 9 - Silicates | |||
| ⓘ | Forsterite | 9.AC.05 | Mg2SiO4 |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| Unclassified | |||
| ⓘ | 'Clinopyroxene Subgroup' | - | |
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Plessite' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Granite-Rhyolite ProvinceMagmatic Province
- Shawnee DomainDomain
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References
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