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St Mesmin meteorite, Saint-Mesmin, Nogent-sur-Seine, Aube, Grand Est, Francei
Regional Level Types
St Mesmin meteoriteMeteorite Fall Location
Saint-MesminCommune
Nogent-sur-SeineArrondissement
AubeDepartment
Grand EstRegion
FranceCountry

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Key
Latitude & Longitude (WGS84):
48° 27' North , 3° 56' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Saint-Mesmin848 (2016)1.0km
Rilly-Sainte-Syre222 (2016)1.8km
Droupt-Saint-Basle296 (2016)3.0km
Vallant-Saint-Georges363 (2016)3.1km
Chauchigny255 (2016)4.1km
Other/historical names associated with this locality:
Champagne-Ardenne


Ordinary chondrite, brecciated (LL6,br; S2; W0)
Fell, 30 May1866; 8.3 kg, 3 stones.

After the appearance of a fireball, detonations followed and 3 stones were recovered (4.2 kg, 2.2 kg, and 1.9 kg). The meteorite has been given considerable attention as it contains a complex silicate mass of LL chondritic composition accompanied by small, but conspicuous dark H-group clasts. Overall, Olivine (~58 vol%; Fa~30, av.), accompanied by several pyroxenes (~18 vol%) and abundant reddish-brown feldspathic glass, are dominant. Granular olivine and pyroxene along with pockets of feldspar are found within the fine-grained matrix along with occasional large olivine and pyroxene chondrule relicts (up to 0.75 mm). The chondrules and matrix silicates are accompanied by minor troilite (~1vol%) along with lesser amounts of chromite and Fe-Ni metal. Indeed, while officially labelled an LL6 chondrite, the meteorite is unusually poor in both troilite and Fe-Ni metal.

A cosmic ray exposure (CRE) age of ~16.1 Ma is quite similar to those of ~20% of other LL chondrites with measured CRE) age. The suggestion has been made that most of these LL chondrites may have been ejected into their eventual earth-crossing orbits by a catastrophic collision ~15 million years ago.

The LL chondrites are the smallest group of ordinary chondrites (~10% of fully classified falls). The 42 witnessed LL6 type falls represent ~50% of listed LL falls listed in early 2016. In 2000 the largest remaining portion of St. Mesmin (1.9 kg) was at the Museum National d'Histoire Naturelle (Paris).

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Mineral List


7 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:

Albite
Formula: Na(AlSi3O8)
Reference: Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).
Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: Oligoclase in poikilitic lithic fragments.
Reference: Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: Augite in Xenoliths (~Fs26Wo33).
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).
Chromite
Formula: Fe2+Cr3+2O4
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).
Diopside
Formula: CaMgSi2O6
Description: Ca-rich clinopyroxene in poikilitic lithic fragments.
Reference: Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).
'Fayalite-Forsterite Series'
Description: Typical Composition results (characteristic of LL chondrites) — (Fa29) Mason, 1963 and Fredriksson et al.,1968; (Fa~31, Fodor&Keil,1975). Olivine also found within within orthopyroxene oikocrysts.
Reference: Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).; Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).; Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. ; Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).
'Feldspar Group'
Reference: Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
'Glass'
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).
Merrillite
Formula: Ca9NaMg(PO4)7
Reference: Kothari, B.K. & Rajan, R.S. (1980) Fission Track Ages of Fayetteville, Weston and St. Mesmin Phosphates: Implications Regarding Brecciation (abstract). Meteoritics 15 (4): 318-19. (Dec 1980).
'Meteoritic Iron'
Reference: Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
'Orthopyroxene Subgroup'
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).; Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).
Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: Pigeonite in Xenoliths (~Fs30Wo5-15).
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).
Troilite
Formula: FeS
Reference: Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).; Fodor, R.V. & Keil, K. (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10(4), 325-340. (Dec 1975).

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Group 8 - Phosphates, Arsenates and Vanadates
Merrillite8.AC.45Ca9NaMg(PO4)7
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside9.DA.15CaMgSi2O6
Pigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'Glass'-
'Meteoritic Iron'-
'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
(AB)3(XO4)2
Merrillite38.3.4.4Ca9NaMg(PO4)7
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Pigeonite65.1.1.4(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
var. Oligoclase-(Na,Ca)[Al(Si,Al)Si2O8]
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'Glass'-
'Meteoritic Iron'-
'Orthopyroxene Subgroup'-

List of minerals for each chemical element

OOxygen
O DiopsideCaMgSi2O6
O Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O ChromiteFe2+Cr23+O4
O Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
O MerrilliteCa9NaMg(PO4)7
O AlbiteNa(AlSi3O8)
NaSodium
Na Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Na MerrilliteCa9NaMg(PO4)7
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg MerrilliteCa9NaMg(PO4)7
AlAluminium
Al Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Al AlbiteNa(AlSi3O8)
SiSilicon
Si DiopsideCaMgSi2O6
Si Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si AlbiteNa(AlSi3O8)
PPhosphorus
P MerrilliteCa9NaMg(PO4)7
SSulfur
S TroiliteFeS
CaCalcium
Ca DiopsideCaMgSi2O6
Ca Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca MerrilliteCa9NaMg(PO4)7
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe ChromiteFe2+Cr23+O4
Fe Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe TroiliteFeS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Fredriksson, K., Nelen, J. & Fredriksson, B.J. (1968) The LL-group chondrites. IN: Origin and Distribution of the Elements: ‪International Series of Monographs in Earth Sciences‬ (Ahrens, L. H.- Ed.), pp. 457-466. Elsevier.
Dodd, R.T. (1974) St. Mesmin: a petrologic overview (abstract). Meteoritics 9: 334-335. (Dec 1974).
Dodd, R.T. & Jarosewich, E. (1976) Olivine microporphyry in the St. Mesmin chondrite: Meteoritics 11 (1): 1-20. (March 1976).
Fodor, R.V. & K. Keil (1975) Implications of poikilitic textures in LL-group chondrites. Meteoritics 10 (4): 325-339. (Dec. 1975).
Kothari, B.K. & Rajan, R.S. (1980) Fission Track Ages of Fayetteville, Weston and St. Mesmin Phosphates: Implications Regarding Brecciation (abstract). Meteoritics 15 (4): 318-19. (Dec 1980)
Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Crozaz G., Pellas, P., Bourot-Denise, M., de Chazal, S.M., Fieni, C., Lundberg, L.L. & Zinner, E. (1989) Plutonium, uranium and rare earths in the phosphates of ordinary chondrites—the quest for a chronometer: Earth and Planetary Science Letters 93: 157-169.
Graf, T. & Marti, K. (1994) Collisional records in LL-chondrites. Meteoritics 29(5): 643–648. (Sept 1994).
Grady, M.M (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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