Authors :
Mahmood R. Sofe; Emad Y. Alashkham; Nuri A. Aleisawi
Volume/Issue :
Volume 8 - 2023, Issue 1 - January
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3WCScon
DOI :
https://doi.org/10.5281/zenodo.7567296
Abstract :
Meteorites are the oldest rocks available for
study and record processes that took place during the
birth and early history of the Solar System. These rocks
are derived from asteroids by cratering collisions,
eventually crossing Earth′s orbit to land on the Earth’s
surface. As a result and unlike terrestrial rocks, the
meteorites demonstrate very diverse textures. The
orbital relationships between meteorites and asteroids
suggest that the interior of the asteroid belt is
characterised by parent bodies with an abundance of
chondrules. The petrographic study of a meteorite fall
was carried out to identify its texture and petrographic
sub-type. The meteorite fell in Al-Deyasser village west
to Gharyan city, Libya (N: 32o
09 03" – E: 12
o
59 02")
with total mass of about 100g. A polished thin section of
the rock was studied using polarizing light microscope
and SEM (scanning electron microscope), it illustrates
mixture of chondrules, mm-sized silicate mineral
‘droplets’, olivine surrounded by a bright silver-colored
iron-metal matrix, ~62 vol % of metals (~ Fe and Ni). In
addition, carbonate and quartz occur as rare and small
crystals within isolated pores that formed during
aqueous alteration in the parent bodies of meteorite.
Using RTB (Rose-Tschermak- Brezina) scheme the
meteorite is being to be related to a sub-group of
meteorites called the pallasite meteorites that are rare
and very complex meteorites. These meteorites
represent mixtures of core and mantle materials that lie
on the core-mantle boundary in the interior of the
Earth.
Keywords :
meteorite; pallasite; carbonate minerals.
Meteorites are the oldest rocks available for
study and record processes that took place during the
birth and early history of the Solar System. These rocks
are derived from asteroids by cratering collisions,
eventually crossing Earth′s orbit to land on the Earth’s
surface. As a result and unlike terrestrial rocks, the
meteorites demonstrate very diverse textures. The
orbital relationships between meteorites and asteroids
suggest that the interior of the asteroid belt is
characterised by parent bodies with an abundance of
chondrules. The petrographic study of a meteorite fall
was carried out to identify its texture and petrographic
sub-type. The meteorite fell in Al-Deyasser village west
to Gharyan city, Libya (N: 32o
09 03" – E: 12
o
59 02")
with total mass of about 100g. A polished thin section of
the rock was studied using polarizing light microscope
and SEM (scanning electron microscope), it illustrates
mixture of chondrules, mm-sized silicate mineral
‘droplets’, olivine surrounded by a bright silver-colored
iron-metal matrix, ~62 vol % of metals (~ Fe and Ni). In
addition, carbonate and quartz occur as rare and small
crystals within isolated pores that formed during
aqueous alteration in the parent bodies of meteorite.
Using RTB (Rose-Tschermak- Brezina) scheme the
meteorite is being to be related to a sub-group of
meteorites called the pallasite meteorites that are rare
and very complex meteorites. These meteorites
represent mixtures of core and mantle materials that lie
on the core-mantle boundary in the interior of the
Earth.
Keywords :
meteorite; pallasite; carbonate minerals.
