{"620184":{"#nid":"620184","#data":{"type":"event","title":"Sulfur Systematics Illuminate the Elusive Record of Magma Redox Evolution","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EThe School of Earth and Atmospheric Sciences Presents, Dr. Rita Economos, Southern Methodist University, Dedman College of Humanities \u0026amp; Sciences\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003ESulfur Systematics Illuminate the Elusive Record of Magma Redox Evolution\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003ESulfur is an important element in igneous systems due to its impact on magma redox, its role in the formation of economically valuable ore deposits, and the influence of catastrophic volcanogenic sulfur degassing on global climate.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe mobility and geochemical behavior of sulfur in magmas is complex due to its multi-valent (from S\u003Csup\u003E2-\u003C\/sup\u003E\u0026nbsp;to S\u003Csup\u003E6+\u003C\/sup\u003E) and multi-phase (solid, immiscible liquid, gaseous, dissolved ions) nature. Sulfur behavior is closely linked with the evolution of oxygen fugacity (\u003Cem\u003Ef\u003C\/em\u003EO\u003Csub\u003E2\u003C\/sub\u003E) in magmas; the record of\u0026nbsp;\u003Cem\u003Ef\u003C\/em\u003EO\u003Csub\u003E2\u003C\/sub\u003E\u0026nbsp;evolution is often difficult to extract from rock records, particularly for intrusive systems that undergo cyclical magmatic processes and crystallize to the solidus.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe apply a novel method of measuring sulfur isotopic ratios via secondary ion mass spectrometry (SIMS) in zoned apatite crystals that we interpret as a record of open-system magmatic processes.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThese findings have implications for the coupled sulfur and\u0026nbsp;\u003Cem\u003Ef\u003C\/em\u003EO\u003Csub\u003E2\u003C\/sub\u003E\u0026nbsp;evolution of granitic plutons and suggest that the in-situ measurement of sulfur isotopic ratios in apatite is a powerful new tool for evaluating coupled redox and sulfur behavior in a wide range of terrestrial and extraterrestrial magmatic systems.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. Rita Economos, School of Earth and Atmospheric Sciences"}],"uid":"34458","created_gmt":"2019-04-08 15:53:12","changed_gmt":"2019-04-08 16:55:14","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-04-11T12:00:00-04:00","event_time_end":"2019-04-11T12:55:00-04:00","event_time_end_last":"2019-04-11T12:55:00-04:00","gmt_time_start":"2019-04-11 16:00:00","gmt_time_end":"2019-04-11 16:55:00","gmt_time_end_last":"2019-04-11 16:55:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"620183":{"id":"620183","type":"image","title":"Rita Economos","body":null,"created":"1554738570","gmt_created":"2019-04-08 15:49:30","changed":"1554738570","gmt_changed":"2019-04-08 15:49:30","alt":"","file":{"fid":"236128","name":"R. Economos.jpg","image_path":"\/sites\/default\/files\/images\/R.%20Economos.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/R.%20Economos.jpg","mime":"image\/jpeg","size":22985,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/R.%20Economos.jpg?itok=Nq2s0N3s"}}},"media_ids":["620183"],"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. Greg Huey\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}