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Study of foraminifera's relative changes and lithology of coast sand in Ra’as Shimra-Lattakia

دراسة الغزارة النسبية للمنخربات و التركيب الليتولوجي للرمال الشاطئية في منطقة رأس شمرا-اللاذقية

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 Publication date 2016
  fields Geology
and research's language is العربية
 Created by Shamra Editor




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A microscopic study was done on five samples from the current beach sand at Ra’asShimra beach in order to identify their Foraminifera content and the abundance of the species relative to each other. The micropaleontology analysis showed that the majority of the 17 specified types live on the bottom in shallow marine waters at moderate to hot temperatures. The abundance of the species was noticed in the benthic species such as: Amphistegina, Textularia, and peneroplis, which indicates the availability of suitable environmental conditions for the prosperity of these species, which is close to the current conditions. The samples of sand studied are characterized by their being disjointed, small to medium in size, varying in color, and rich in organic remains, mainly the remains of molluscs, in addition to oval marine-originated stones that vary in size. The X.R.D analysis showed the presence of two phases: a major calcareous phase, and a secondary quartz phase. The study of the thin rock slides taken from rocks located in the region, which can be considered as the source rocks of sand in the study area, showed that it is a sandy limestone.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة المجهرية تحليل خمس عينات من الرمال الشاطئية في منطقة رأس شمرا-اللاذقية. تم تحديد محتوى المنخربات وغزارة الأنواع بالنسبة لبعضها البعض. أظهرت التحاليل أن معظم الأنواع تعيش في قاع المياه البحرية الضحلة بدرجات حرارة معتدلة إلى دافئة. تمثلت الغزارة الكبيرة في أنواع الأجناس القاعية مثل Amphistegina وPeneroplis، مما يدل على توفر شروط بيئية مناسبة لازدهار هذه الأجناس. تتميز الرمال المدروسة بكونها مفككة، ناعمة إلى متوسطة الحجم، متنوعة الألوان وغنية ببقايا الهياكل العضوية، خاصة بقايا الرخويات. أظهرت تحاليل X.R.D وجود طورين رئيسيين هما الطور الكلسي والطور الكوارتزي. كما أظهرت دراسة الشرائح الصخرية أن الصخور المنتشرة في المنطقة هي عبارة عن حجر رملي كلسي. تهدف الدراسة إلى تحديد أنواع البقايا العضوية والمنخربية في العينات، وتحديد الغزارة النسبية لهذه البقايا، والظروف الترسيبية، واستنتاج بيئة الترسيب السائدة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مفيدة في فهم التركيب الليتولوجي والغزارة النسبية للمنخربات في الرمال الشاطئية، إلا أنها تفتقر إلى تحليل أعمق للعوامل البيئية الأخرى التي قد تؤثر على توزيع المنخربات. كما أن الدراسة ركزت بشكل كبير على الجانب المجهري دون الأخذ في الاعتبار التغيرات الموسمية أو الزمنية التي قد تؤثر على النتائج. كان من الممكن أن تكون الدراسة أكثر شمولية إذا تم تضمين عينات من مواقع مختلفة وأعماق مختلفة لتحليل التغيرات العمودية والأفقية في الغزارة النسبية للمنخربات.
Questions related to the research
  1. ما هي الأنواع الأكثر غزارة في الرمال الشاطئية في منطقة رأس شمرا؟

    الأنواع الأكثر غزارة هي الأنواع القاعية مثل Amphistegina وPeneroplis.

  2. ما هي الخصائص الفيزيائية للرمال المدروسة؟

    الرمال المدروسة مفككة، ناعمة إلى متوسطة الحجم، متنوعة الألوان وغنية ببقايا الهياكل العضوية.

  3. ما هي الأطوار الرئيسية التي تم تحديدها في تحليل X.R.D؟

    الأطوار الرئيسية هي الطور الكلسي والطور الكوارتزي.

  4. ما هي أهمية دراسة الغزارة النسبية للمنخربات؟

    تساعد دراسة الغزارة النسبية للمنخربات في تحديد الشروط البيئية التي كانت سائدة في الفترة الزمنية المدروسة، مثل درجة الحرارة ومستوى سطح البحر.


References used
B.F, M.K.,. Evolution and geological significance of the larger benthic foraminifera. Elsevier, UK.(1980),355
ANN.H; REW S. H; NORMAN. M.Atlas of Benthic Foraminifera. 1st,Wiley-Blackwell,London ,2013,642
M.K. Biostratigraphic and Geological Significance of Planktonic Foraminifera.1st Academic Press, Elsevier (2012),250
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