Do you want to publish a course? Click here

Petrological Study of Clay deposits of the Lower Cretaceous in Northern of South Palmyra Folding Zone-Syria

دراسة بترولوجية للتوضعات الغضارية العائدة للكريتاسي الأسفل في الجزء الشمالي من نطاق الطي التدمري الجنوبي - سورية

1882   0   436   0 ( 0 )
 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The Petrological study of Clay deposits belonging to the lower Cretaceous in the northern part of South Palmyra Folding Zone. Showed they were formed as a result of weathering processes of igneous rocks within Sedimentary continental climate is hot and wet conditions, and formed lateritic iron soil, followed by enrich, erosion and washing caused by watery agitate and re-replaced for short distances within valleys or grooves or local karst cavities, and later filled by crust erosion materials through the Cretaceous Sea transgression.

References used
BREW, G.;BARAZNGI, M.; Al-MALEH, K. and SAWAF,t .(2001): Tectonic and Geologic Evolution of Syria. Geo Arabia, Bahrrain, Vol.6.N0.4,573p
EBEREL, D.D. (1984): Clay Mineral Formation and Transformation in Rocks and Soils. 241-257p Great Britain
LOGVENINCO, N.V.(1984): Petrography of Sedimentary Rocks ,with bases of methology High school, Moscow, U.S.S.R .Third edition .416 p
rate research

Read More

This research studies the economic importance of lower Cretaceous clay deposits of South Palmyra folding zone. This study carried out using appropriate research methods. The Palmyra sand formation, which includes clays deposits, has divided into t hree units depending on its lithological facies. Its chemical and mineral composition and physical properties had identified, it is mostly of Kaolinite, Illite, Quartz and other secondary minerals.
Shiranish formation in Sazaba Oil fields region had been divided by Petrology study and well Logs measurements to three major members (lower – middle – upper). Then these members have been divided to lithostratigraphic units and subunits. This stu dy showed that the lower member is formed of clayey - limestone rocks rich in planktonic foraminifera and glaconitic sand. The middle member consists of organic limestone facies, dolomitic-limestone, sometimes clayey - limestone rocks with crystals of pyrite and glaconitic sand. Organic- limestone rocks and detrital limestone are predominant in the upper member interbeded by dolomitic-limestone and rare clayey – limestone. This facies contains pelagic and planktonic foraminifera. The role of diagenes phenomenon is evident on Shiranish’s facies through: dolomitization according to burial and miksing processes. It is also clear through chemical compaction, mechanical compaction, cemenation, micretisation and silisification.
The study was made in the region of the NNE-SSW trending Mrah anticline. This anticline is one of the main anticlines belonging to the Northern part of the Palmyride fold belt, lying amid Syria, in the northern Arabian plate. The lithostratigraphic column of the study area consists of the marine sediments of upper Cretaceous and lower Paleogene age. The field study involved the description and measurement of the brittle deformations in ٢٥ sites, which are distributed stratigraphically and geographically in the different parts of the Mrah anticline. Data processing and field observations led to a reconstruction of the principal stresses, which affected the region, and their evolution relative to the main folding phase (Neogene-Quaternary).
Middle Miocene deposits reveal the form of outcrops which are limited in area on the northern boards of the basin of AL-KABEER Al-Shemaly River. It is characterized by a large and fast changes in thickness and facies. This study focused on the res ults of careful Fossile analysis of 41 samples (hard and soft) which were taken from the three geological sections, through which the principal zones, which characterize middle Miocene, were confirmed depending on planktonic foraminifera. N9, -Orbulina suturalis-Globerotalia peripheroronda N10-N13-Globerotalia fohsi, Sphaaerodinellopsis subdehiscens- Globigrina drury , N14 – Globigerina nepenthes- Globerotalia siakensis. It was identified as benthic foraminifera, which has been characterized by its diversity and their increasing numbers in the northern boards of the Neogene basin and identify the lithology of these deposits consisting of alternations of limestone and limestone of medium hardness to very soft marl with different colors. This study also contributed to the detection of some paleogeographical development in the basin in that period of time.
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 lithostratigraph ic 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.
comments
Fetching comments Fetching comments
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا