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Chondrites
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Chondrites are the oldest
known matter. These meteorites developed simultaneously with our
central star, the Sun, by crystalizing out in the presolar primeval
nebula in form of ball-like spezies, the so-called chondrules. These
chondrules condensed together with other presolar matterl to smaller
and larger rocks and remained the following 4,5 billions years more or
less unchanged.
Chemically the Chondrites
resemble the Sun if one refrains from the missing of all fleeting
elements as well as helium and hydrogen. But according to the place, in
which the respective Chondrites crystalized out in the presolar
primeval nebula they are significantly different, thus numerous groups
and clans are distinguished, which further below are described
individually.
Next to the separation in
clans and groups, Chondrites are generally distinguished according to
so-called petrological classes, a scale of 1 to 7 that gives
information about the differentiation degree of the individual
Chondrites. The classes 1 and 2 occur only in Carbonaceous Chondrites
and designate meteorites with sparse, little chondrules in which a
change took place through oxidising and water. The class 3 designates
meteorites with large, clear chondrules that remained almost unchanged
while the classes 4 to 6 designate Chondrites, that increasingly got
heated in their history and hereby were changed. The chondrules with
higher petrological degree become more and more undifferentiated and
fuse with the matrix. The class 7 finally comprises meteorites whose
chondric nature becomes clear only through their chemical compound.
They contain no more chondrules and form a kind of transition to the
Achondrites.
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Jiddat al Harasis Jah Chondrites:
Research of the Jiddat al Harasis Chondrite:
| Meteoritical Bulletin |
Proposed Name
Jiddat al Harasis xxx
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Abbreviation
JaH xxx
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Pseudonyms or field names
SH107-39
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Location of Recovery (description)
desert
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Date of Recovery
07.03.2003
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Country
Oman
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State or province
Al Wusta
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Latitude
19°21.531
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Longitude
055°32.906
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Mass (g)
16879.1
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Type spec (g)
26.6
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Type spec locatio
Univ. Kiel
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Number of Pieces
70
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Classifier and institution
Barto
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Class
L ~6
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Shock
4
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WG
4.42
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234 g 90 Euro sold |
248 g 100 Euro sold |
412 g 160 Euro |
442 g 170 Euro sold |
Dho 408 L 6 161,2 g 90 Euro
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Dho 616 H 5/6 11,3 g 8 Euro sold
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Dho 649 L6 25,5 g 15 Euro sold
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Dho 446 12,7 g 8 Euro
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Please click
on images to enlarge
(the
backside of each meteorite
is shown)
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