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Simmern meteorite, Simmern, Hunsrück, Rhineland-Palatinate, Germany

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Latitude & Longitude (WGS84): 49° 58' 60'' North , 7° 31' 60'' East
Latitude & Longitude (decimal): 49.9833333333, 7.53333333333
Name(s) in local language(s): Simmern-Meteorit, Simmern, Hunsrück, Rheinland-Pfalz, Deutschland
 
Fell 1 July 1920.
3 stones in a larger strewnfield.
Ordinary chondrite, H5.

After a fireball and detonations, stones fell in at least three places over a 18.5 km long x 3 km wide strewn field and were subsequently recovered. One of the stones broke into 4 pieces. Prominent olivine-rich and pyroxene-rich chondrules are found within a matrix which contains olivine grains, Fe-Ni metal, and assorted other phases. While most pyroxene is orthopyroxene, orthopyroxene-clinopyroxene intergrowths were also observed.

Zircons inclusions found within chromite clusters have provided evidence of a very ancient age for the Simmern material. Small, but significant differences between chromites and Cr-rich spinels have been used to further characterize the cooling histories of Simmern and other chondrites.

Simmern is one of 11 witnessed H-chondrite falls recovered in Germany since 1785. As of 2000 the largest Simmern specimens were held at Berlin's Museum für Naturkunde (366 g) and at Bonn Universität (200 g).

Mineral List



9 entries listed. 4 valid minerals.

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References

Busz, K. (1921) Der Meteorit von Simmern. IN: Neues Jahrbuch für Mineralogie, Geologie und Paleontologie. Band 2, Heft 3/4, Seite 292-293. [Vol. 2, #3/4: 292-293]. E. Schweizerbart'sche Verlagsbuchhandlung: Stuttgart.

Wlotzka, F., Ireland, Trevor R. & Schulz-Dobrick, B. (Dec 1990) Zircons in the Vaca Muerta mesosiderite and Simmern H5 chondrite: I. Occurrence and chemistry. Meteoritics 25 (4): p. 420. (Dec 1990)

Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.

Wlotzka F. (2005) Cr spinel and chromite as petrogenetic indicators in ordinary chondrites: Equilibration temperatures of petrologic types 3.7 to 6. Meteoritics & Planetary Science 40 (#11): 1673-1702. (Nov 2005).

Julia Roszjar, Martin J. Whitehouse, Addi Bischoff (2014) Meteoritic zircon – Occurrence and chemical characteristics: Chemie der Erde-Geochemistry 74 (3): 453-469.

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