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| Content Provider | Springer Nature Link |
|---|---|
| Author | Al Garni, Mansour A. El Behiry, Mohamed G. Gobashy, Mohamed M. |
| Copyright Year | 2010 |
| Abstract | Magnetic and seismic methods have been used in this study as complementary methods to each other to construct a geologic hazard map for Wadi Thuwal area. Magnetic interpretation for deep-seated geologic structures has involved reduction to pole algorithm and downward continuation techniques. It showed that there are three major fault trends: NE-SW and NNE-SSW, NW-SE, and N-S. Furthermore, shear zone has been found close to Harrat Thuwal, which was confirmed by the seismic method. Seismic method revealed three lithologic layers where the depth of the bedrock was found to be ranging between 9 m at the southeastern part of the study area and 24 m at its northern part. It showed also five major fault trends: NW-SE, ENE-WSW, NE-SW, and nearly E-W. Supported by the surface geology, magnetic and seismic results showed that the Wadi Thuwal area can be divided into three zones on the basis of geologic hazards, depending on the presence of geologic features such as faults. It is recommended that before any development plan in Wadi Thuwal area, the delineated hazard zonation should be taken into account.تم استخدام طريقتي المغناطيسية والسيزمية في هذة الدراسة كطرق مكملة لبعض البعض لإنشاء خريطة للمخاطر الجيولوجية لمنطقة وادي ثول. لقد تم استخدام تقنية ايعازالبيانات المغناطيسية الى القطب بالاضافة الى عمل تقنية استمرارية هذة البيانات في النزول الى مستويات اسفل لاستخدامها في تفسير التراكيب الجيولوجية العميقة. ولقد اظهرت النتائج المغناطيسية ثلاثة اتجاهات رئيسية من الفوالف: شمال شرق-جنوب غرب و شمال شمال شرق-جنوب جنوب غرب، شمال غرب-جنوب شرق، و شمال-جنوب بالأضافة الى وجود نطاق قصي قريب من حرة ثول والتي اكدت الطريقة السيزمية تواجدة. كما إن الطريقة السيزمية قد أظهرت ثلاث أنواع مختلفة في التتابع الطبقي، حيث إن عمق صخور القاعدة يتراوح مابين 9 م في الجزء الجنوب الشرقي لمنطقة الدراسة إلى 24 م في الجزء الشمالي منها. كما إن تفسيرات البيانات السيزمية قد أظهرت خمسة اتجاهات رئيسية من الفوالق: شمال غرب-جنوب شرق، شرق شمال شرق-غرب جنوب غرب، شمال شرق-جنوب غرب، وتقريبا شرق-غرب. لقد أظهرت الطرق المغناطيسية والسيزمية، بالإضافة إلى دعم الدراسة الجيولوجية التركيبية السطحية، إن منطقة وادي ثول يمكن تقسيمها إلى ثلاثة نطاقات مختلفة المخاطر الجيولوجية معتمدة على أماكن وجود الفوالق وكثافتها. وأخيرا فان هذه الدراسة توصي بأنة قبل البدء في أي عمل خطة لتطوير منطقة وادي ثول فانه يجب اخذ هذه التصنيفات النطقية في عين الاعتبار. |
| Starting Page | 133 |
| Ending Page | 146 |
| Page Count | 14 |
| File Format | |
| ISSN | 18667511 |
| Journal | Arabian Journal of Geosciences |
| Volume Number | 5 |
| Issue Number | 1 |
| e-ISSN | 18667538 |
| Language | Arabic |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-05-08 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Magnetic Seismic Hazards Wadi Thuwal Earth Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Environmental Science |
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