The Geomorphologic Responses to Active Fault Propagation Fold in the Western Algerian Tell Chain: A Case Study from the Southern Part of Beni-Chougrane Mountains.
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| Title: | The Geomorphologic Responses to Active Fault Propagation Fold in the Western Algerian Tell Chain: A Case Study from the Southern Part of Beni-Chougrane Mountains. |
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| Authors: | Refas, S.1 (AUTHOR), Zaagane, M.1 (AUTHOR) zaagane@yahoo.fr, Mouassa, S.1 (AUTHOR), Tamer, A.2 (AUTHOR), Zehafi, B.1 (AUTHOR) |
| Source: | Geotectonics. Jun2022, Vol. 56 Issue 3, p339-360. 22p. |
| Subject Terms: | *Geological cross sections, *Thrust belts (Geology), *Folds (Geology), *Pleistocene Epoch, *Hinges |
| Geographic Terms: | Algeria |
| Abstract: | Located in the western part of the Tell Chain of Algeria, the Beni-Chougrane Mountains are characterized by recent tectonic activity in a compressive regime affecting the entire chain. Shortening-oriented NNW/SSE constantly generates significant seismic activity along active tectonic structure such as faults and folds which extended over tens of kilometers. The southern front of the Beni-Chougrani Mountains presents a very interesting folding structure, where the relationship between the morphotectonic evolution and the geomorphological indicators have been easily applied. For this purpose, 16 profiles of hydrographic network arranged perpendicularly in the southern flank of the fold were analyzed. Results obtained show that: (i) channels oriented 60° N are arranged parallel to the folding axis and correspond to the collecting drains belonging to two stages of the fold amplification, (ii) the dendritic and/or linear forms of hydrographic networks associated respectively with immature and mature stages, (iii) channels profiles show various shapes suggesting spatial gradient of uplift rate along the fold, (iv) growths of the strata show a tabular structure in the form of a shoulder, especially in the central part. Our results show that geomorphological anomalies coincide perfectly with the fold amplification characterized by a hinge migration towards the South according to the current direction of the shortening (340° N). The equilibrated geological cross-section obtained by numerical modeling show that the surface detachment is located at 1056 m in depth which and can correspond to evaporitic formations of Triassic. The amplitude of the local shortening is estimated almost 35 m especially during the Pleistocene. We highlighted the role of inherited faults in the control of this deformation. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 159197735 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Geomorphologic Responses to Active Fault Propagation Fold in the Western Algerian Tell Chain: A Case Study from the Southern Part of Beni-Chougrane Mountains. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Refas%2C+S%2E%22">Refas, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zaagane%2C+M%2E%22">Zaagane, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zaagane@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Mouassa%2C+S%2E%22">Mouassa, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tamer%2C+A%2E%22">Tamer, A.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zehafi%2C+B%2E%22">Zehafi, B.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geotectonics%22">Geotectonics</searchLink>. Jun2022, Vol. 56 Issue 3, p339-360. 22p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Geological+cross+sections%22">Geological cross sections</searchLink><br />*<searchLink fieldCode="DE" term="%22Thrust+belts+%28Geology%29%22">Thrust belts (Geology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Folds+%28Geology%29%22">Folds (Geology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Pleistocene+Epoch%22">Pleistocene Epoch</searchLink><br />*<searchLink fieldCode="DE" term="%22Hinges%22">Hinges</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Algeria%22">Algeria</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Located in the western part of the Tell Chain of Algeria, the Beni-Chougrane Mountains are characterized by recent tectonic activity in a compressive regime affecting the entire chain. Shortening-oriented NNW/SSE constantly generates significant seismic activity along active tectonic structure such as faults and folds which extended over tens of kilometers. The southern front of the Beni-Chougrani Mountains presents a very interesting folding structure, where the relationship between the morphotectonic evolution and the geomorphological indicators have been easily applied. For this purpose, 16 profiles of hydrographic network arranged perpendicularly in the southern flank of the fold were analyzed. Results obtained show that: (i) channels oriented 60° N are arranged parallel to the folding axis and correspond to the collecting drains belonging to two stages of the fold amplification, (ii) the dendritic and/or linear forms of hydrographic networks associated respectively with immature and mature stages, (iii) channels profiles show various shapes suggesting spatial gradient of uplift rate along the fold, (iv) growths of the strata show a tabular structure in the form of a shoulder, especially in the central part. Our results show that geomorphological anomalies coincide perfectly with the fold amplification characterized by a hinge migration towards the South according to the current direction of the shortening (340° N). The equilibrated geological cross-section obtained by numerical modeling show that the surface detachment is located at 1056 m in depth which and can correspond to evaporitic formations of Triassic. The amplitude of the local shortening is estimated almost 35 m especially during the Pleistocene. We highlighted the role of inherited faults in the control of this deformation. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0016852122030074 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 22 StartPage: 339 Subjects: – SubjectFull: Geological cross sections Type: general – SubjectFull: Thrust belts (Geology) Type: general – SubjectFull: Folds (Geology) Type: general – SubjectFull: Pleistocene Epoch Type: general – SubjectFull: Hinges Type: general – SubjectFull: Algeria Type: general Titles: – TitleFull: The Geomorphologic Responses to Active Fault Propagation Fold in the Western Algerian Tell Chain: A Case Study from the Southern Part of Beni-Chougrane Mountains. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Refas, S. – PersonEntity: Name: NameFull: Zaagane, M. – PersonEntity: Name: NameFull: Mouassa, S. – PersonEntity: Name: NameFull: Tamer, A. – PersonEntity: Name: NameFull: Zehafi, B. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 00168521 Numbering: – Type: volume Value: 56 – Type: issue Value: 3 Titles: – TitleFull: Geotectonics Type: main |
| ResultId | 1 |
