Structural analysis of Turtle Mountain (Alberta) using digital elevation model: Toward a progressive failure
Saved in:
| Title: | Structural analysis of Turtle Mountain (Alberta) using digital elevation model: Toward a progressive failure |
|---|---|
| Authors: | Jaboyedoff, Michel1,2 http://www.quanterra.org, Couture, Réjean3, Locat, Pascal4 |
| Source: | Geomorphology. Jan2009, Vol. 103 Issue 1, p5-16. 12p. |
| Subjects: | Structural analysis (Engineering), Rockslides, Three-dimensional imaging, Landscapes, Geologic faults, Geological modeling |
| Geographic Terms: | Turtle Mountain (Alta.), Alberta |
| Abstract: | Abstract: In 1903, the eastern slope of Turtle Mountain (Alberta) was affected by a 30 M m3-rockslide named Frank Slide that resulted in more than 70 casualties. Assuming that the main discontinuity sets, including bedding, control part of the slope morphology, the structural features of Turtle Mountain were investigated using a digital elevation model (DEM). Using new landscape analysis techniques, we have identified three main joint and fault sets. These results are in agreement with those sets identified through field observations. Landscape analysis techniques, using a DEM, confirm and refine the most recent geology model of the Frank Slide. The rockslide was initiated along bedding and a fault at the base of the slope and propagated up slope by a regressive process following a surface composed of pre-existing discontinuities. The DEM analysis also permits the identification of important geological structures along the 1903 slide scar. Based on the so called Sloping Local Base Level (SLBL) an estimation was made of the present unstable volumes in the main scar delimited by the cracks, and around the south area of the scar (South Peak). The SLBL is a method permitting a geometric interpretation of the failure surface based on a DEM. Finally we propose a failure mechanism permitting the progressive failure of the rock mass that considers gentle dipping wedges (30°). The prisms or wedges defined by two discontinuity sets permit the creation of a failure surface by progressive failure. Such structures are more commonly observed in recent rockslides. This method is efficient and is recommended as a preliminary analysis prior to field investigation. [Copyright &y& Elsevier] |
| Copyright of Geomorphology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 35324791 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Structural analysis of Turtle Mountain (Alberta) using digital elevation model: Toward a progressive failure – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Jaboyedoff%2C+Michel%22">Jaboyedoff, Michel</searchLink><relatesTo>1,2</relatesTo><i> http://www.quanterra.org</i><br /><searchLink fieldCode="AR" term="%22Couture%2C+Réjean%22">Couture, Réjean</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Locat%2C+Pascal%22">Locat, Pascal</searchLink><relatesTo>4</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geomorphology%22">Geomorphology</searchLink>. Jan2009, Vol. 103 Issue 1, p5-16. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Rockslides%22">Rockslides</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+imaging%22">Three-dimensional imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Landscapes%22">Landscapes</searchLink><br /><searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+modeling%22">Geological modeling</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Turtle+Mountain+%28Alta%2E%29%22">Turtle Mountain (Alta.)</searchLink><br /><searchLink fieldCode="DE" term="%22Alberta%22">Alberta</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: In 1903, the eastern slope of Turtle Mountain (Alberta) was affected by a 30 M m3-rockslide named Frank Slide that resulted in more than 70 casualties. Assuming that the main discontinuity sets, including bedding, control part of the slope morphology, the structural features of Turtle Mountain were investigated using a digital elevation model (DEM). Using new landscape analysis techniques, we have identified three main joint and fault sets. These results are in agreement with those sets identified through field observations. Landscape analysis techniques, using a DEM, confirm and refine the most recent geology model of the Frank Slide. The rockslide was initiated along bedding and a fault at the base of the slope and propagated up slope by a regressive process following a surface composed of pre-existing discontinuities. The DEM analysis also permits the identification of important geological structures along the 1903 slide scar. Based on the so called Sloping Local Base Level (SLBL) an estimation was made of the present unstable volumes in the main scar delimited by the cracks, and around the south area of the scar (South Peak). The SLBL is a method permitting a geometric interpretation of the failure surface based on a DEM. Finally we propose a failure mechanism permitting the progressive failure of the rock mass that considers gentle dipping wedges (30°). The prisms or wedges defined by two discontinuity sets permit the creation of a failure surface by progressive failure. Such structures are more commonly observed in recent rockslides. This method is efficient and is recommended as a preliminary analysis prior to field investigation. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geomorphology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=35324791 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.geomorph.2008.04.012 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 5 Subjects: – SubjectFull: Structural analysis (Engineering) Type: general – SubjectFull: Rockslides Type: general – SubjectFull: Three-dimensional imaging Type: general – SubjectFull: Landscapes Type: general – SubjectFull: Geologic faults Type: general – SubjectFull: Geological modeling Type: general – SubjectFull: Turtle Mountain (Alta.) Type: general – SubjectFull: Alberta Type: general Titles: – TitleFull: Structural analysis of Turtle Mountain (Alberta) using digital elevation model: Toward a progressive failure Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Jaboyedoff, Michel – PersonEntity: Name: NameFull: Couture, Réjean – PersonEntity: Name: NameFull: Locat, Pascal IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 0169555X Numbering: – Type: volume Value: 103 – Type: issue Value: 1 Titles: – TitleFull: Geomorphology Type: main |
| ResultId | 1 |
