منطقة جبال الأبانين بالقصيم - دراسة جيومورفولوجية

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Date

2014

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Saudi Digital Library

Abstract

يقوم البحث على الدراسة الجيومورفولوجية لمنطقة جبال الأبانين (أبان الأسمر وأبان الأحمر) الواقعة بإقليم القصيم بالمملكة العربية السعودية، وتشغل منطقة الدراسة جزءاً من إقليم الدرع العربي. حيث يهدف هذا البحث إلى إجراء دراسة جيومورفولوجية تفصيلية لمنطقة جبال الأبانين، وتصنيف ظاهراتها وبحث نشأتها وتطورها، حيث تتضمن منطقة الدراسة ظواهر ارتبطت نشأتها بتفكك الصخور Rock Disintegration تجوية ميكانيكية أو طبيعية، وعمليات تحلل صخرى Rock Decomposition تجوية كيميائية، وهناك ظواهر أخرى نشأت وتطورت في ظل تصريف نهرى وتعرية مائية في وقت كانت فيه الظروف المناخية مختلفة وأكثر رطوبة مما هي عليه الآن، وحينما حل الجفاف نشطت الرياح واشتد ساعدها وشكلت ظواهر نحت وأخرى إرساب، وعلى الرغم من أن ظواهر النحت بفعل الرياح تبدو صغيرة الحجم ومحدودة التوزيع ؛ نظراً لصلابة الصخور وشدة مقاومتها، فإن ظواهر الإرساب بوساطة الرياح شائعة وتغطى مساحة مترامية في منطقة الدراسة، وتتمثل نفود الميسرية بشكل أساسي، فضلا عن تراكمات رملية أخرى حول مجرى وادى الرمة بين الأبانين، بينما يوجد نفود العريق المتسع إلى الغرب من منطقة الدراسة وهو وثيق الصلة بنفود الميسرية.

Description

The research aims to study the geomorphology of the Abanat Mountains area (Aban Al-Asmar and Aban Al-Ahmar). It is located at Qassim province, Saudi Arabia. The study area is a part of the Arabian Shield Regions, located at its eastern end, just to the west of Al-Rass city, and away in about 140 km from Buraidah City. The study located between latitudes 41 "23 '25˚- 23" 55' 25˚ N, and longitudes 55 "39 '42˚- 43" 03' 43˚ E, take the form of longitudinally extending from the northeast to the southwest estimated distance about 65.42 kilometers, while the width varies from 6.46- 18.90 km, with an average width of 15 kilometers, it has an estimated area of 840.40 square kilometers The most important characteristic of the study area is the presence and a number of urban settlements, notably in Asmar Mount, Nabhania Governate and some other villages. As for the area of Ahmar Mount there are many settlements and villages, the urban settlements are all connected to each other by asphalt roads and paved roads, the road network was the cause of the ease of access and connectivity to all sites in the study area. This research aims to achieve detailed geomorphological study of Abanat Mountains area, and classification of phenomena according to the foundations of the methodology, and stand on the origins and evolution, and also study the Abanat origin and development under the successive structural events which swept the Arabian shield, in particular those that have accompanied the emergence of the Red Sea Graben. And its impact on the study area geomorphological landforms, and the study of the effects associated with the ancient processes of climatic conditions, which has been active at the time of formation, as well as the study of the current climatic conditions, and how they contribute to the development of some landforms, and also exams the dominant weathering processes, and knowledge of the phenomena associated with the inception operations ancient and modern, as well as the study of the valleys in the study area, and to evaluate re-feasibility dams, especially after it has been in existence in time and become the effects remarkable, and study the sedimentary production (terraces – alluvial plains - alluvial fans) to see to what extent it can be relied upon in the field Agricultural activity in the light of the available water resources.

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