Official
name : Tanezrouft 067
Date of find : November
27, 2002
Total mass : 50
g
# of fragments : 1
fragment unique
Place
: Tanezrouft
(Algeria)
Meteoritical Bulletin n°88 (expected May 04)
Classified by : ENS
Lyon - France
Type : L
- Impact Melt
Weathering grade : W2
%Fa : 23.99%
(range 23.3-24.7%)
%Fs : 19.14% (range 05.9-20.8%)
Remarks (ENS) : This
L chondrite impact melt has a brecchia structure with centimetric
clasts, embedded in a fine-grained olivine/pyroxene matrix. Within
this matrix, small rounded sulphur grains are present diagnostic
of melting. The clasts are recrystallized showing an advanced
L6 type petrology. Millimetric shock veins are criss-crossing
the section, but the Raman spectroscopy investigation did not
reveal the occurrence of any high-pressure polymorph (...) |
|
on site picture : November
27, 2002
(...) It
is made of a mixture of highly recrystallized chondritic clasts.
Only one relict chondrule was observed in the studied thin section.
Numerous rounded sulphurs are observed in the matrix diagnostic
of a melting event. Since BB313 is an impact melt, it could be
classified as shock stage 7. |