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Parsa meteorite, Muzaffarpur, Bihar, India

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Latitude & Longitude (WGS84): 26° 11' 59'' North , 85° 23' 59'' East
Latitude & Longitude (decimal): 26.20000,85.40000
Non-native locality type:Meteorite
Meteorite Class:EH3 chondrite meteorite
Meteoritical Society Class: EH3
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Cwa : Monsoon-influenced humid subtropical climate


Enstatite Chondrite, high-iron [EH3.5; S3]
Fall, 14 April 1942, 800 g; weathered

Two stones (masses ~600 g, ~200 g) fell on opposite sides of the Gandak River. They were not fully described and classified, however, until the 1970’s. Both stones are Enstatite Chondrites, but the larger stone also contains a large semi-exotic clast labeled as an ‘Aubrite basalt vitrophyre (ABV)’. Unfortunately, for reasons not completely understood, Parsa also shows signs of unanticipated weathering (e.g., Fe-oxides) not normally seen in observed falls.

The Enstatite Chondrite Class is defined by specific elemental ratios and by earthlike oxygen isotopic ratios. Mineralogically, Enstatite Chondrites are characterized by the presence of dominant iron-poor Enstatite, accessory Fe-Ni metal, and a number of very reduced mineral phases (sulfides, nitrides, silicides). Many of these phases are either unknown or very rare in terrestrial rocks. The EH (high iron) chemical group is further characterized by abundant iron (~10-20 vol%) and the minerals niningerite and perryite. Parsa’s EH3.5 petrologic type indicates that Parsa’s abundant chondrules and matrix have been incompletely equilibrated by mild metamorphism. In addition, Parsa’s S3 shock level indicates moderately strong pre-terrestrial shock.

In 1989 Klaus Keil proffered a number of persuasive arguments suggesting separate parent bodies for EH Chondrites, EL Chondrites, Aubrites, and the unusual Shallowater meteorite. However, Parsa’s somewhat mixed mineralogical population is not easily explained with such a clean separation of the Enstatite-rich meteorite homeworlds.

Recommended Initial References:
Bhandari, N., Shah, V. B. & Wasson, J. T. (1980). The Parsa enstatite chondrite. Meteoritics, 15 (3): 225-233. (Sept 1980)
Keil, K. (1989) Enstatite meteorites and their parent bodies, Meteoritics 24 (4): 195-208. (Dec 1989)

Mineral List


12 valid minerals.

Meteorite/Rock Types Recorded

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This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Andrew L. Graham, Editor (1979). Meteoritical Bulletin, No. 56. Meteoritics 14, #2, 161-175 (June 1979).

Bhandari, N., Shah, V. B. & Wasson, J. T. (1980). The Parsa enstatite chondrite. Meteoritics 15 (3): 225-233. (Sept 1980)

Nehru, C. E., Prinz, M., Weisberg, M. K. & Delaney, J. S. (1984) Parsa: an Unequilibrated Enstatite Chondrite (uec) with an Aubrite-Like Impact Melt Clast (abstract), Lunar and Planetary Science XV, 597-598. (March 1984)

Keil, K. (1989) Enstatite meteorites and their parent bodies, Meteoritics 24 (4): 195-208. (Dec 1989)

Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

Fogel, R. A. (2005) Aubrite basalt vitrophyres: The missing basaltic component and high-sulfur silicate melts, Geochimica et Cosmochimica Acta 69 (6): 1633-1648. (March 2005)

Quirico, E., Bourot-denise, M., Robin, C., Montagnac, G. & Beck, P. (2011) A reappraisal of the metamorphic history of EH3 and EL3 enstatite chondrites, Geochimica et Cosmochimica Acta 75 (11): 3088-3102. (June 2011)

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