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Basic information Name: Blaubeuren
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1989
Country: Germany
Mass:help 30.67 kg
Meteoritical Bulletin:  MB 109  (2020)  H4-5
Recommended:  H4-5    [explanation]

This is 1 of 87 approved meteorites (plus 1 unapproved name) classified as H4-5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Jul 2020
Writeup from MB 109:

Blaubeuren        48°24’06.4"N, 9°46’01.3"E

Baden-Wurttemberg, Germany

Find: 1989

Classification: Ordinary chondrite (H4-5)

History: (D. Heinlein): In the garden of his property in Blaubeuren-Weiler, Mr. Hansjörg Bayer was laying an empty pipe for power cabling in 1989. When excavating the cable duct, he found a stone of over 30 kg at 50-70 cm depth, which had an unusually high density and was attracted to a magnet. The finder noticed the object as something special, hence he kept the stone in his garden from 1989 to 2015. In this period it was placed at different locations, always outdoors, exposed to weathering. Since 2015 the stone was kept dry in the basement of his house. In 2020 it was examined and recognized as a stony meteorite.

Physical characteristics: (D. Heinlein, A. Bischoff, IfP): The rock has a mass of 30.26 kg and is heavily weathered at the outside, since it was lying in the garden for several decades. Bulk density is 3.34±0.01 g/cm3. Fusion crust is absent due to weathering. After the examination of the meteorit,e another fragment of 410 grams was found in the garden, which obviously was broken off from the main piece.

Petrography: (A. Bischoff, IfP): The meteorite is heavily weathered (W3). The remaining metal grains have thick rims of terrestrial alteration products (Fe-oxides and Fe-hydroxides). The rock is a breccia containing fragments of petrologic type 4 and type 5. The breccia is very weakly shocked (S2).

Geochemistry: (K. Klemm, A. Bischoff, IfP): The mean composition of olivine is Fa18.4±0.3 with a compositional range of Fa18.0-19.2 (n = 19). The low-Ca pyroxenes have a mean composition of Fs16.2±0.4 (n = 18) with a range of Fs15.7-17.4.

Classification: (K. Klemm, A. Bischoff, IfP): H4-5; the rock is a brecciated H-group ordinary chondrite containing fragments of petrologic type 4 and type 5.

Specimens: Type specimen: 20.2 g, IfP; the main mass with finder

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Private garden
Mass (g):30670.0
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):18.4±0.3 (n = 19)
Ferrosilite (mol%):16.2±0.4 (n = 18)
Wollastonite (mol%):1.5±0.2 (n = 18)
Classifier:K. Klemm, A. Bischoff, IfP
Type spec mass (g):20.2
Type spec location:IfP
Main mass:Finder
Comments:Submitted by Klemm K.
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Heinlein: Dieter Heinlein, Lilienstrasse 3, 86156 Augsburg, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     Recommended::   (48° 24' 6"N, 9° 46' 1"E)

     This is 1 of 3 approved meteorites from Baden-Wurttemberg, Germany (plus 1 unapproved name) (plus 1 impact crater)
     This is 1 of 57 approved meteorites from Germany (plus 22 unapproved names) (plus 2 impact craters)
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