{"638885":{"#nid":"638885","#data":{"type":"event","title":"Strain Localization at Cratonic Edges: Constraints from East Africa","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EThe School of Earth and Atmospheric Sciences Presents Dr. Cynthia Ebinger, Tulane University\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EStrain Localization at Cratonic Edges: Constraints from East Africa\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESutures between Archaean cratons and younger orogenic belts represent some of Earth\u0026rsquo;s largest lateral heterogeneities:\u0026nbsp; \u0026gt; 170 km-thick, buoyant and relatively dry lithosphere juxtaposed to ~100 km-thick, more volatile-rich mantle lithosphere. \u0026nbsp;\u0026nbsp;We use new and existing data from the African continent to examine the role of pre-existing lithospheric thickness and composition variations on the time-space localization of magmatism, faulting, and basin formation.\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESeismic tomography and magneto-telluric models, crust and mantle xenolith chemistry, earthquakes, reveal consistent patterns in the style of basin formation and distribution of magmatism.\u0026nbsp; We evaluate models of mantle upwelling beneath a variable thickness lithosphere with spatial variations in the direction and magnitude of seismic anisotropy, which is strongly influenced by mantle flow patterns along lithosphere-asthenosphere topography, fluid-filled cracks, and pre-existing strain fabrics.\u0026nbsp; \u0026nbsp;Enhanced mantle flow and melt extraction at craton edges may localize strain in thick lithosphere, as indicated by energetic lower crust and upper mantle earthquakes.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. Cynthia Ebinger, Earth \u0026 Atmospheric Sciences"}],"uid":"34458","created_gmt":"2020-09-09 18:08:12","changed_gmt":"2020-09-10 17:07:35","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-09-17T12:00:00-04:00","event_time_end":"2020-09-17T13:00:00-04:00","event_time_end_last":"2020-09-17T13:00:00-04:00","gmt_time_start":"2020-09-17 16:00:00","gmt_time_end":"2020-09-17 17:00:00","gmt_time_end_last":"2020-09-17 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"638883":{"id":"638883","type":"image","title":"Cynthia Ebinger","body":null,"created":"1599674641","gmt_created":"2020-09-09 18:04:01","changed":"1599674641","gmt_changed":"2020-09-09 18:04:01","alt":"","file":{"fid":"242921","name":"C. Ebinger.JPG","image_path":"\/sites\/default\/files\/images\/C.%20Ebinger.JPG","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/C.%20Ebinger.JPG","mime":"image\/jpeg","size":39112,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/C.%20Ebinger.JPG?itok=_Vwrr3Ke"}}},"media_ids":["638883"],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (EAS)"}],"categories":[],"keywords":[{"id":"175623","name":"EAS Seminar"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EDr. Andrew Newman\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}