{"id":546,"date":"2013-09-26T14:12:40","date_gmt":"2013-09-26T12:12:40","guid":{"rendered":"http:\/\/wp.unil.ch\/risk\/?p=546"},"modified":"2013-11-04T16:09:01","modified_gmt":"2013-11-04T15:09:01","slug":"marie-charriere-granulometrical-geological-and-morphological-description-of-the-frank-slide-deposit-alberta-canada","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/risk\/marie-charriere-granulometrical-geological-and-morphological-description-of-the-frank-slide-deposit-alberta-canada\/","title":{"rendered":"Marie Charri\u00e8re: Granulometrical, geological and morphological description of the Frank Slide deposit (Alberta, Canada)"},"content":{"rendered":"

Marie Charri\u00e8re<\/em>
\nSupervisor:\u00a0Prof. Michel Jaboyedoff<\/em>
\nExpert:\u00a0Ing. Geol. Corey Froese<\/em><\/p>\n

The Frank Slide (Alberta, Canada) is one of the rock avalanches which was the most\u00a0studied throughout the History of the research on this kind of landslides. Indeed, it was\u00a0already analyzed just after its occurrence in 1903, where 70 people died. Nevertheless, a\u00a0complete description of its deposit was never conducted.<\/p>\n

Hence, this study proposes the results of such an analysis based on field survey and\u00a0numerical methods. The description of the deposit is conducted following several\u00a0parameters. The spatial pattern of the surface\u2019s granulometry, resulting from a field\u00a0sampling, is complete by a remote sensing analysis which uses morphological filtering. It\u00a0appears that globally the bigger blocks are found in the central part of the deposit.\u00a0Granulometrical indicators, such as the diameters corresponding to each volumetric\u00a0frequency and the uniformity and curvature coefficients, present a partially sinusoidal\u00a0spatial distribution in the longitudinal direction of the propagation.<\/p>\n

In addition, the spatial distribution of the geological formations, which conserve the\u00a0original stratigraphic sequence, is enhanced. It allows proposing a mode of collapse and\u00a0propagation of the mass. The hinge area, which is supposed to have been the weakest
\npoint of the Turtle Mountain anticline, seems to have been the starting point of a shearing\u00a0mechanism. After the failure, during the motion, the normal limb overrode the inverse\u00a0limb. Thus, the Banff and the Lower Livingstone formations, which constituted the hinge,\u00a0travelled at the front of the moving mass and reached the farthest distance. In this\u00a0configuration, the Upper Livingstone formation, which was initial located at the top of
\nTurtle Mountain, must have been positioned at the end of the rock avalanche during the\u00a0propagation. This can explain its presence in the proximal part of the deposit. The Mt-Head formation was initially positioned at the toe of the fell mass. It was hence\u00a0overridden by the other part of the moving mass. Its actual position on the deposit surface\u00a0suggests that it gradually stopped during the motion.<\/p>\n

This study is also constituted of morphology\u2019s analysis of the deposit. Based on GIS\u00a0results such as, among others, shaded relief map, roughness index map, azimuth map and\u00a0plan curvature map, it highlights the presence of morphological features like longitudinal\u00a0ridges, flowbands, hummocks and compression ridges. Moreover, a heterogeneity of the\u00a0flow in enhanced by the distinction of the three different behaviors. This allows\u00a0understanding the process of transport.<\/p>\n

The Sloping Base Level Method (SLBL) is also used in this study. It permits to\u00a0reconstruct the original topography of the mountain and to simulate the spatial\u00a0distribution of the deposit\u2019s thickness. Furthermore, it leads to an upward revaluation of\u00a0the volume of the Frank Slide avalanche to approximately the double of the conventional\u00a0value of 30 millions cubic meters.<\/p>\n","protected":false},"excerpt":{"rendered":"

Marie Charri\u00e8re Supervisor:\u00a0Prof. Michel Jaboyedoff Expert:\u00a0Ing. Geol. Corey Froese The Frank Slide (Alberta, Canada) is one of the rock avalanches which was the most\u00a0studied throughout the History of the research … <\/p>\n","protected":false},"author":1341,"featured_media":926,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[73758],"tags":[29716],"class_list":{"0":"post-546","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-masters_completed","8":"tag-29716"},"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts\/546","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/users\/1341"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/comments?post=546"}],"version-history":[{"count":0,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts\/546\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/media\/926"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/media?parent=546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/categories?post=546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/tags?post=546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}