Sedimentary and Palaeogeographic Evolution of Kurachina Dolomite Formation in the Palmyrian Belt Zone in Syria

This research aims to study the sedimentary and palaeogeographic evolution of the Kurachina Dolomite Formation along Palmyrian belt zone. Studying this formation in its Northern and Southern parts has shown that it consists of two lithostratigraphic members, where each of them includes a series of lithological units. The petrological study of the components of these units shows that they are composed of four distinguished facies: Dolomitic limestones, clayey limestones, clays and anhydrites, pure or mixed, and deposited in repeated harmonic layers, gathered mostly in neutral sedimentary sequences. Dolomitic limestones are the most common and important facies, they are composed of micrite muds which have been subjected, in different degrees to synsedimentary or late dolomitisation processes through pumping or burial mechanisms. Dolomitisation intensity decreases downward the formation and increases laterally from the south to the north of the Palmyrian chain.

Petrology and Diagenesis Study of Rutbah Formation in Omar fields in Euphrates graben

Al Rutba Formation , bellowing to the upper Cretaceous, is one the main formation of the stratigraphical coumn of Euphrate Depression. It is importance becomes from that it can statute the principle petroleum reservoir in high member of the depression fields. Producing oil and the natural gas. The importance of this group is to be the main reservoir of oil in various fields of low oil producing natural gas. The present study is based on subsurface geological data, presented by cores, well logs and chemical results of the analyses laboratory.

Petrological and Geochemical Study of Dolomitization in the Middle Jurassic Rock of AL-Querdaha Sheet

This study was carried out in AL-Querdaha Sheet, in the north and center of the coastal chain in northwestern Syria, in order to determine the spread and model of dolomitization in the region due to its importance (scientific and economic), three stratigraphic sections were raised in the north, center and south of the study area and take rock samples from them, one hundred microscopic slides were prepared for study with of polarizing microscope before and after staining with Alizarin Red, Potassium fresianide solution to detect Ferroan dolomite and calcite, XRF analysis was also performed on the rock samples to determine the percentage of major oxides in them, the study showed that the dolomitization in the region follow seepage- reflux model, it also showed that the northern part of the study area is free from any trace of the dolomitization, while it is spreading in the center and south of the region, and showed There are four types of zones around the dolomite crystals from the inside out:1-dolomite zones, 2-calcite zones, 3- ferroan dolomite zones, 4- hematite zones, the presence of the zones reflects several stages of the Diaginiese, starting with the formation of the dolomitic zones due to the increase in the ratio Mg/Ca, which leads to the replacement of Ca 2+ by Mg2+in the initial calcite crystals and the formation of early dolomite crystals.