{"688482":{"#nid":"688482","#data":{"type":"event","title":"EAS Planetary \u0026 Astrobiology Seminar - Dr. Joana Voigt","body":[{"value":"\u003Cp\u003EVolcanism is among the dominant processes that form and modify terrestrial landforms and atmospheres in our Solar System. Therefore, constraining the timing and flux of volcanism is of key importance in planetary volcanology. While lava flow-fields are often perceived as featureless\u2014sometimes even boring\u2014when observed from space, detangling the details recorded on solidified lava flows is instrumental in revealing the evolution of planetary bodies.\u003C\/p\u003E\u003Cp\u003EA region of outstanding interest is Elysium Planitia on Mars. It is home to the youngest volcanic terrains, which are only a few million years old and the region may still be volcanically active. Elysium Planitia also exhibits the largest fluvial outflow channel carved in the late Amazonian epoch. By integrating geomorphological (CTX and HiRISE), geophysical (SHARAD and MOLA), and chronological constraints, we reconstructed the fluvial, volcanic, and magmatic evolution in Elysium Planitia.\u003C\/p\u003E\u003Cp\u003EWhile Mars\u2019 surface is dominated by volcanic terrains, the surface and subsurface have experienced aqueous modification and are thus often shaped by an interplay between volcanic and aqueous activities. Many regions on Mars show signs of water\u2013rock interaction, as indicated by the detection of hydrated silica by CRISM. Hydrated silica is significant for understanding past environmental conditions, such as the longevity and intensity of aqueous alteration. In addition to implications on aqueous conditions, siliceous materials\u2014including opal\u2014provide an excellent substrate to preserve biosignatures.\u003C\/p\u003E\u003Cp\u003EFurther, analog sites here on Earth provide the means of testing our tools, approaches, and interpretations used in planetary sciences. The 2014\u20132015 Holuhraun lava flow-field in the Icelandic highlands provides a unique martian analog, allowing us to refine our understanding of eruption dynamics and lava morphology through a combination of remote sensing, unoccupied aircraft systems, and field observations. This seminar will demonstrate how these tools and techniques enhance our comprehension of effusive eruptions and the interactions between water and rock within volcanic terrains.\u003C\/p\u003E\u003Cp\u003E*Refreshments: 10:30 AM - 11:00 AM (ES\u0026amp;T L1175)\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EVolcanism is among the dominant processes that form and modify terrestrial landforms and atmospheres in our Solar System. Therefore, constraining the timing and flux of volcanism is of key importance in planetary volcanology. While lava flow-fields are often perceived as featureless\u2014sometimes even boring\u2014when observed from space, detangling the details recorded on solidified lava flows is instrumental in revealing the evolution of planetary bodies.\u003C\/p\u003E\u003Cp\u003EA region of outstanding interest is Elysium Planitia on Mars. It is home to the youngest volcanic terrains, which are only a few million years old and the region may still be volcanically active. Elysium Planitia also exhibits the largest fluvial outflow channel carved in the late Amazonian epoch. By integrating geomorphological (CTX and HiRISE), geophysical (SHARAD and MOLA), and chronological constraints, we reconstructed the fluvial, volcanic, and magmatic evolution in Elysium Planitia.\u003C\/p\u003E\u003Cp\u003EWhile Mars\u2019 surface is dominated by volcanic terrains, the surface and subsurface have experienced aqueous modification and are thus often shaped by an interplay between volcanic and aqueous activities. Many regions on Mars show signs of water\u2013rock interaction, as indicated by the detection of hydrated silica by CRISM. Hydrated silica is significant for understanding past environmental conditions, such as the longevity and intensity of aqueous alteration. In addition to implications on aqueous conditions, siliceous materials\u2014including opal\u2014provide an excellent substrate to preserve biosignatures.\u003C\/p\u003E\u003Cp\u003EFurther, analog sites here on Earth provide the means of testing our tools, approaches, and interpretations used in planetary sciences. The 2014\u20132015 Holuhraun lava flow-field in the Icelandic highlands provides a unique martian analog, allowing us to refine our understanding of eruption dynamics and lava morphology through a combination of remote sensing, unoccupied aircraft systems, and field observations. This seminar will demonstrate how these tools and techniques enhance our comprehension of effusive eruptions and the interactions between water and rock within volcanic terrains.\u003C\/p\u003E\u003Cp\u003E*Refreshments: 10:30 AM - 11:00 AM (ES\u0026amp;T L1175)\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Volcanic Terrains as Records of Lava Emplacement and Aqueous Modification on Earth and Mars"}],"uid":"36678","created_gmt":"2026-02-23 20:07:58","changed_gmt":"2026-02-26 15:51:52","author":"tbuchanan9","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2026-03-06T11:00:00-05:00","event_time_end":"2026-03-06T12:00:00-05:00","event_time_end_last":"2026-03-06T12:00:00-05:00","gmt_time_start":"2026-03-06 16:00:00","gmt_time_end":"2026-03-06 17:00:00","gmt_time_end_last":"2026-03-06 17:00:00","rrule":null,"timezone":"America\/New_York"},"location":"EST L1175","extras":["free_food"],"hg_media":{"679398":{"id":"679398","type":"image","title":"Voigt - Headshot","body":null,"created":"1771877400","gmt_created":"2026-02-23 20:10:00","changed":"1771877400","gmt_changed":"2026-02-23 20:10:00","alt":"Voigt - Headshot","file":{"fid":"263556","name":"Voigt---Headshot.jpg","image_path":"\/sites\/default\/files\/2026\/02\/23\/Voigt---Headshot.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2026\/02\/23\/Voigt---Headshot.jpg","mime":"image\/jpeg","size":835642,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2026\/02\/23\/Voigt---Headshot.jpg?itok=HE_1MmI-"}}},"media_ids":["679398"],"related_links":[{"url":"https:\/\/www.joanavoigt.com\/","title":""}],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (EAS)"}],"categories":[],"keywords":[{"id":"175623","name":"EAS Seminar"},{"id":"722","name":"Astrobiology"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}