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Importance of Petrology
Petrology
Scientific
Federation is
going to conduct a conference on Earth
Science & Geo Science at Amsterdam,
Netherlands on August 13-14, 2018. Petrology
is one of session where presentations can be done at Summit.
Dr. Mokhles K. Azer who is Professor of Geological Sciences
Department, National Research Centre, Egypt and who specializes in igneous and
metamorphic petrology and regional tectonics, with a particular research focus
on the petrogenesis and geochemistry of juvenile crust of the Arabian-Nubian
Shield exposed in Eastern Desert and Sinai. His scholarly accomplishments have received several
honors and awarded many prizes due to his outstanding contributions to the
geology of Egypt. Dr. Mokhles K. Azer was published 76 works (papers and
abstracts). The papers are published in the most prestigious scientific
journals in the field of Geology with High Impact factor. Being a Featured Speaker at International
Conference on Earth Science & Geo Science Conference held by Scientific
Federation Dr. Mokhles K. Azer is going to talk on ‘The
Homrit-Waggat granitoids of the Eastern Desert of Egypt and the transition from
subduction-related to post-collisional magmatism in the north Arabian-Nubian
Shield.’ A brief summary is presented here.
We
report field and geochemical observations of the granitoids of the Homrit
Waggat area in the central Eastern Desert of Egypt. We recognize two magmatic
phases in the study area. The early phase of weakly deformed subduction-related
calc-alkaline rocks includes tonalite and granodiorite. We label the later
phase the Homrit Waggat Pluton (HWP); it includes undeformed biotite granite,
alkali feldspar granite, and minor albitized granite. The tonalite and
granodiorite have lower alkalis, REE, Nb, Zr and Hf with Ta-Nb troughs than the
granites of the HWP. The geochemical characteristics of both phases reflect a
range of magma sources that evolved through fractional crystallization and
crustal contamination. The early magmatic pulse is a subduction-related suite
generated by underplating of mantle-derived magmas that triggered partial
melting of mafic lower crust; mixing of these melts led to intermediate magma
that further fractionated to tonalite and granodiorite. The original textures of the
albitized granites are preserved, but their bulk composition was modified by
the production of Na-rich minerals and the removal of K, REE, and some trace
elements by fluids.
Dr. Reza Zarei Sahamieh Who is a professor of Petrology
and scientific member at department of geology, Lorestan University, Khorram
Abad, Iran. He also had been appointed as Head of Geology Department of
Lorestan University six years (2011-2017). His research interested area is
Petrology and Geochemistry on witch eight Ph.D researches is carrying out. Dr.
Reza Zarei Sahamieh was published 35 technical papers in national and
international journals and more than 80 technical papers in national and
international symposiums. He has got many national awards from different
professional societies and organizations. Being a Featured Speaker at
International Conference on Earth Science & Geo Science Conference held by
Scientific Federation Dr. Reza Zarei Sahamieh is going to talk on ‘Petrology and Geochemistry of Kermanshah OphioliteComplex
the Remnant of Southern Neo-Tethys Ocean(Western of Iran).’ A brief
summary is presented here.
The
Kermanshah (Harsin) ophiolite as remnant of the Mesozoic southern branch of the
Neo-Tethys Ocean and as well as precursous remnants of the Peri-Arabic
ophiolite system obducted on to Arabian shield (Gondwana). Petrographic
evidences indicate that this ophiolitic sequence consists of both mantle and
crustal rock units. The complex consists of harzburgitic,
lherzoliticperidotites, isotropic and myloniticgabbros, dyke complex, basaltic
pillow lavas and small outcrop of plagiogranite. Geochemical studies indicate
that Harsin mafic rocks(SE
Kermanshah) bears charactristics of
island arc environment while the mafic and ultramafic rocks of Sahneh region(NE
Kermanshah) displaying P-type MORB nature. Occurrences of basalts with
different composition in this region can be interpreted as the result of an
interaction between MORB-type and OIA-type asthenosphere. Field relationships
and geochemical evidences reveal that the Harsinophiolites were a part of a
rifted basin at the ocean-continent transition zone formed in the south of the
Neo-Tethyan Ocean. Geological evidences imply the subducting of Southern
Neo-TethyanOcean in an island arc geotectonic system during the Late Cretaceous
culminated in closure of Southern Neo-Tethyan basin as well as formation of arc
and back arc basin in the region and associated lithounits in Kermanshah
ophiolite. This
would also explain both the contemporaneous occurrence of MORB-type and
OIB-type magmatism, as well as the lack of a magmatic evolution from depleted
to enriched rocks.
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