{ "151483-21911645": { "datetime_modified":"20260909T131851", "datetime_start":"20260916T100000", "datetime_end":"20260916T110000", "has_end_time":1, "date_start":"2026-09-16", "date_end":"2026-09-16", "time_start":"10:00:00", "time_end":"11:00:00", "time_zone":"America\/Detroit", "event_title":"Guest Lecture: Tina L\u00fcdecke", "occurrence_title":"", "combined_title":"Guest Lecture: Tina L\u00fcdecke: Meat, Veggies, or Termites? New Insights into Hominin Diet from Nitrogen Isotopes in Fossil Tooth Enamel", "event_subtitle":"Meat, Veggies, or Termites? New Insights into Hominin Diet from Nitrogen Isotopes in Fossil Tooth Enamel", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Dr. L\u00fcdecke is a research group leader at Max Planck Institute for Chemistry. She investigates early hominin diets and their ecological context, with a focus on the onset and evolution of meat consumption and the position of Plio-Pleistocene hominins in African paleo\u2013food webs, using stable isotopes in tooth enamel. She also reconstructs Neogene paleolandscapes inhabited by early hominins, examining C4 grassland expansion in relation to changes in seasonality, precipitation, temperature, atmospheric pCO\u2082, and tree cover.\n\nHer work combines extensive field research with geochemical approaches \u2014 stable isotopes of carbon, oxygen, nitrogen, and zinc, clumped isotopes, and multi-element analyses \u2014 applied to fossil tooth enamel, pedogenic carbonates, and other proxy materials. Her research areas span the Miocene to Pleistocene in eastern and southern Africa, including early hominin sites of the Afar Depression (Ethiopia), Manyara Basin (Tanzania), Karonga Basin (Malawi), Urema Basin (Mozambique), and the Cradle of Humankind (South Africa). Dr. L\u00fcdecke also works on younger, out-of-Africa localities including Oman, Indonesia, Mexico, and Turkey.\n\nHer goal is to link early hominin dietary adaptations to ecosystem change, assess the significance of animal resource consumption, and evaluate the role of dietary flexibility in extinction and adaptive radiation.", "occurrence_notes":null, "guid":"151483-21911645@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151483", "building_id":"1000188", "building_name":"1100 North University Building", "campus_maps_id":"628", "room":"2008", "location_name":"1100 North University Building", "has_livestream":0, "cost":"", "tags":["Earth And Environmental Sciences"], "website":"", "sponsors":[ { "group_name":"Earth and Environmental Sciences", "group_id":"3170", "website":"http:\/\/www.lsa.umich.edu\/earth" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/09\/event_151483_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/09\/event_151483_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/09\/event_151483_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/09\/event_151483_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/09\/event_151483_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/09\/event_151483_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/09\/event_151483_original-1.png" }, "occurrence_count":1, "first_occurrence":21911645 } , "150796-21910202": { "datetime_modified":"20260824T123249", "datetime_start":"20260918T153000", "datetime_end":"20260918T163000", "has_end_time":1, "date_start":"2026-09-18", "date_end":"2026-09-18", "time_start":"15:30:00", "time_end":"16:30:00", "time_zone":"America\/Detroit", "event_title":"Smith Lecture: Raquel Alonso-Perez", "occurrence_title":"", "combined_title":"Smith Lecture: Raquel Alonso-Perez: From Emeralds to Gold: Provenance and Traceability Using Harvard's Mineral Collection", "event_subtitle":"From Emeralds to Gold: Provenance and Traceability Using Harvard's Mineral Collection", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Where a gemstone or a grain of gold comes from is no longer a question only paper trails can answer. Emeralds show what is possible: using the largest global dataset available, more than 1,000 LA-ICP-MS analyses of gem-quality emeralds, machine learning models trained on just eight trace elements (Li, V, Cr, Fe, Sc, Ga, Rb, Cs) determine geographic origin with 96.8% accuracy. Gold is the harder problem, and the more urgent: illegal mining in the Amazon drives mercury contamination and opaque supply chains. We are now applying the same architecture to native gold, building the curated reference datasets needed to test whether source-related groupings can be resolved across the geologically heterogeneous Amazonian craton, a stringent challenge given low trace-element concentrations and overlapping geochemical signatures. Built on well-documented reference collections such as Harvard's and partner Brazilian institutions, this work provides an initial basis for geochemical screening of mercury-linked illicit supply chains, and a template for the future of mineral traceability.", "occurrence_notes":null, "guid":"150796-21910202@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150796", "building_id":"1000188", "building_name":"1100 North University Building", "campus_maps_id":"628", "room":"1528", "location_name":"1100 North University Building", "has_livestream":0, "cost":"", "tags":["Earth And Environmental Sciences"], "website":"", "sponsors":[ { "group_name":"Earth and Environmental Sciences", "group_id":"3170", "website":"http:\/\/www.lsa.umich.edu\/earth" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/08\/event_150796_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/08\/event_150796_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/08\/event_150796_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/08\/event_150796_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/08\/event_150796_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/08\/event_150796_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_thumb\/media\/attachments\/2026\/08\/event_150796_original-1.png" }, "occurrence_count":1, "first_occurrence":21910202 } }