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Image description: This is me (Vanessa) crouched beside a black bucket, collecting clams and snails at the German Wadden Sea.
Vanessa Fichtner
Germany
March 24, 2026
When Sulfate Hides in Carbonates: Unlocking Geochemical Secrets across diverse Environments
Carbonate-Associated Sulfate (CAS) has emerged as a powerful proxy for reconstructing ancient ocean chemistry, redox conditions, and climate dynamics. This talk explores CAS across diverse depositional and diagenetic settings, including deep-sea pelagic carbonates, shallow marine deposits, and terrestrial environments. I will present foundational studies that shaped our understanding of CAS to latest research on sulfate cycling in the deep biosphere and applications of CAS in petroleum production water.
Vanessa Fichter  ,March 24, 2026 |
 Joanna Tindall ,March 17, 2026 |  Letícia Rezende de Oliveira ,March 10, 2026 |  Savannah Olroyd ,March 4, 2026 |
 Emma Elliott Smith ,February 24, 2026 |  Jonathan Stine ,February 17, 2026 |  Rodrigo Martinez-Abarca ,February 10, 2026 |
 Alessandro Carniti ,January 13, 2026 |  Emilia Galli ,December 16, 2025 | ||||
 Laura Larocca ,December 2, 2025 |  Margot D. Nelson ,November 25, 2025 |  Gustavo A. Ballen ,November 18, 2025 | |||
 Viplove Rajurkar ,November 11, 2025 |  Xianyi Liu ,October 28, 2025 |  Peter Bishop ,October 21, 2025 | |||
 David Kröck ,October 14, 2025 |  Niklas Bücker ,October 7, 2025 |  Charlotte Hipkiss ,September 30, 2025 | |||
 Lazaro W. Vinola-Lopez ,September 23, 2025 |  Peter Neff ,September 16, 2025 |  Jeet Majumder ,September 9, 2025 | |||
 Bethany Allen ,September 2, 2025 |  Juliet Sefton ,August 27, 2025 |  Franziska Blattmann, August 12, 2025 | |||
 Luz Maria Mejia Ramirez , August 5, 2025 |  Jenny Rashall , July 29, 2025 |  Anniversary Panel , July 22, 2025 | |||
 Iban Goñi , July 15, 2025 |  Science Communication Panel , July 1, 2025 |  Zekun Wang, UK, June 17, 2025 | |||
 Sonja Wahl ,Norway, June 10, 2025 |  Eileen Straube, Germany, June 3, 2025 |  Pam Vervoort , UK, May 27, 2025 | |||
 Thamizharasan Sakthivel ,India, May 20, 2025 |  Elizabeth Sibert ,USA, May 13, 2025 |  Alessio Veneziano , France, May 6, 2025 |
 Victor Radermacher, USA, April 8, 2025 | |||||
 John Wendt ,April 1, 2025 |  Zoe Kulik ,March 25, 2025 |  Sourav Adhya ,March 18, 2025 | |||
 Shraddha Bhurkunde ,March 11, 2025 |  Niklas Hohmann ,Netherlands February 18, 2025 |  Jack Wharton ,UK February 11, 2025 | |||
 Maria Hussain ,Canada February 4, 2025 |  Netta Shalev ,Israel December 3, 2024 |  Petter Hällberg ,Sweden November 26, 2024 | |||
 Verónica Díez Díaz ,Germany November 19, 2024 |  Imran Ali ,UK November 5, 2024 |  Antoine Champreux ,Australia October 29, 2024 | |||
 Savannah Worne ,UK October 22, 2024 |  Stéphanie Bodin ,Germany, October 15, 2024 |  Sinjini Sinha, USA, October 8, 2024 | |||
 Giovanne Mendes Cidade, Brazil, September 17, 2024 |  Nare Ngoepe, Denmark, September 10, 2024 |  Pedro Godoy, Brazil, August 27, 2024 | |||
 Team JOIDES Resolution, July 30, 2024 |  Jana Burke, US, July 9, 2024 |  Jeanette Pirlo, US, July 2, 2024 | |||
 Alice Paine, UK, June 25, 2024 |  Nicolò Ardenghi, UK, June 4, 2024 |  James Mulqueeney, UK, June 4, 2024 | |||
 Gabriella Akpah Yeboah, Ghana, May 28, 2024 |  Meg Nibbelink, USA, May 14, 2024 | ||||
 Bram Vaes, Italy, April 30, 2024 |  Arindam Chakraborty, Malaysia, April 23, 2024 |  Isabel Dove, USA, April 16, 2024 | |||
 Nicholas Gardner ,USA, April 9, 2024 |  Allison Jacobel, USA, April 2, 2024 |  Georgy Falster, Australia, March 26, 2024 | |||
 Jasmina Weimann, USA, March 19, 2024 |  Malin Ödalen, Germany, March 12, 2024 |  Danijela Dimitrijević, Germany, March 5, 2024 | |||
December 2023 – February 2024
 Gabriel Osés, Brazil, February 27, 2024 |  Karen Gariboldi, Italy, February 20, 2024 | ||||
 Frederick Tolchard, South Africa, February 6, 2024 |  Alejandro Izquierdo López, Canada, January 30, 2024 |  Parth Shah, Israel, December 5, 2023 |
September 2023 – November 2023
 Muhammad Aqqid bin Saparin, Malaysia, November 28, 2023 |  Mélina Jobbins, Switzerland, November 21, 2023 |  Anna Weiss, United States, November 14, 2023 | |||
 Christine Yifeng Chen, United States, November 7, 2023 |  Yi-Yang Cho, Taiwan, October 31, 2023 |  Alexandra Zuhr, Germany, October 24, 2023 | |||
 Pablo Milla Carmona, Argentina, October 10, 2023 |  Thamizharasan Sakthivel, India, October 3, 2023 |  Nina Papadomanolaki, Germany, September 26, 2023 | |||
 David Harning, United States, September 19, 2023 |  Russell Bicknell, United States, September 12, 2023 |  Francesca Galasso , Germany September 5, 2023 |
June 2023 – August 2023
 Anwesha Saha, Poland, August 29, 2023 |  Shreya Arora United States August 15, 2023 |  Luke Grinham, United Kingdom August 8, 2023 | |
 Bruno Vila Nova, Brazil August 1, 2023 |  Gabby Kitch, United States July 25, 2023 |  Sarah Kachovich, Australia, July 12, 2023 | |
 Team JOIDES Resolution (The Ocean), At Sea, July 04, 2023 |  Carmi Milagros Thompson, United States June 27, 2023 |  Tina Woltz, United States June 20, 2023 |
March 2023 – May 2023
 Carlos Góis-Marques, Spain May 23, 2023 | ||
 Roger Creel, United States May 16, 2023 |  Sara ElShafie, United States May 9, 2023 |  Pierre Gueriau, Switzerland May 2, 2023 |
 Bongekile Zwane, South America April 25, 2023 |  Zoe Roseby, United Kingdom April 18, 2023 |  Shinya Iwasaki, Japan April 11, 2023 |
 Allison Stegner, United States April 4, 2023 |  Nichola Strandberg, United Kingdom March 28, 2023 |  Richard Buchmann, Brazil March 07, 2023 |
December 2022 – February 2023
 Joshua Zimmt, United States February 28, 2023 |  Abdur Rahman, India February 21, 2023 | ||
 Miranta Kouvari, United Kingdom February 14, 2023 |  Anthony Shillito, Canada February 7, 2023 |  Margot Cramwinckel, Netherlands January 31, 2023 | |
 Vijayananda Sarangi, Sweden,January 24, 2023 |  Robert Patalano, United States, January 17, 2023 |  Mario Bronzati, Brazil December 06, 2022 |
September 2022 – November 2022
 Natalia Villavicencio, ChileNovember 29, 2022 | ||
 Anieke-Brombacher, United Kingdom November 22, 2022 |  Marion McKenzie, United States November 08, 2022 |  Bonnie Teece, United States October 11, 2022 |
 Naima El bani Altuna, Norway October 25, 2022 |  Enquye Negash, United States October 18, 2022 |  Ronnakrit Rattanasriampaipong, United States October 11, 2022 |
 Rachel Lupien, Denmark September 27, 2022 |  Shannon Hsieh, Poland September 13, 2022 |  Katherine Hayes, United States September 6, 2022 |
June 2022 – August 2022
 William Gearty, United States August 30, 2022 | ||
 Heather Page, United States August 23, 2022 |  Jazmin Scarlett, United Kingdom August 16, 2022 |  Sean Thatcher, United States August 10, 2022 |
 Matteo Fabbri, United Kingdom July 26, 2022 |  Anjana Khatwa, United Kingdom July 26, 2022 |  Michael Kipp, United States July 19, 2022 |
 Ian Castro, United States July 12, 2022 |  Melissa Kemp, United States July 05, 2022 |  Tianchen He, United Kindom June 28, 2022 |
 Sofía Barragán Montilla, Germany June 23, 2022 |  David Evans Germany June 14, 2022 |  Jack Shaw, United States June 06, 2022 |
March 2022- May 2022
 Amanda Garcia, United States May 31, 2022 | |||||
 Yassine Ait Brahim, Morocco May 24, 2022 |  Team JOIDES Resolution, At Sea May 17, 2022 |  Lara Maldanis, France May 10, 2022 | |||
 Lily Jackson, United States May 3, 2022 |  Javier Luque, United States April 26, 2022 |  Arianny Storari, Brazil April 19, 2022 | |||
 Erin Dillon, United States April 13, 2022 |  Keir Nichols, United Kingdom April 5, 2022 |  Skye Yunshu Tian, Hong Kong, March 22, 2022 | |||
 Alexandra Auderset, United States, March 15, 2022 |  Sandy Hetherington, United Kingdom, March 8, 2022 |  Michela Johnson, Germany, March 1, 2022 | |||
December 2021- February 2022
 Carina Fish, United States, February 22, 2022 | ||
 Anja Frank, Germany, February 15, 2022 |  Mike MacFarrin, United States, February 8, 2022 |  Sarah Sheffield, United States, February 1, 2022 |
 Abraham Dabengwa, South Africa, January 25, 2022 |  Tyler Kukla, United States, January 18, 2022 |  Navigating Grad School, Panel Discussion December 7, 2021 |
September 2021- November 2021
 Andy Fraass, Canada, November 30, 2021 |  Jess Crumpton-Banks, United Kingdom, November 23, 2021 | |
 Kimberly Lau, United States, November 16, 2021 |  Hagar Hauzer, Israel, November 9, 2021 |  Emma Rehn, Australia, November 2, 2021 |
 Sajjad Akam, United States, October 26, 2021 |  Bryan Shirley, Germany, October 19, 2021 |  Jihad Rachid, Morocco, October 12, 2021 |
 Catherine Strickson, United Kingdom, October 5, 2021 |  Kate Marriott, United States, September 28, 2021 |  Andrew Christ, United States, September 21, 2021 |
 Bill Lukens, United States, September 14, 2021 |  Ryan Mohammed, West Indies, September 7, 2021 |
June 2021- August 2021
 Markus Adloff, United Kingdom, August 31, 2021 |  Makarius Itambu, Tanzania, August 24, 2021 |  Candela Blanco-Moreno, Spain, August 17, 2021 |
 Tripti Bhattacharya, United States, August 10, 2021 |  Deborah Khider, United States, August 03, 2021 |  Farid Saleh, China, July 27, 2021 |
 Catherine Davis, United States, July 20, 2021 |  Mónica Carvalho, United States, July 13, 2021 |  Evan Ramos, United States, July 6, 2021 |
 Joe Moysuik, Canada, June 29, 2021 |  Audrey Taylor, United States, June 22, 2021 |  Ornella Bertrand, United Kingdom, June 15, 2021 |
 Chris Lowery, United States, June 8, 2021 |  Tali Babila, United Kingdom, June 1, 2021 |
March 2021 – May 2021
 Advait Jukar, United States, May 25, 2021 |  Nuria Melisa Morales Garcia, United Kingdom, May 18, 2021 |  Matthias Sinnesael, United Kingdom, May 11, 2021 |
 Shamindri Tennakoon, United States, May 4, 2021 |  Canfa Wang, China, April 27, 2021 |  Agathe Toumoulin, France, April 13, 2021 |
 Sibusiso Biyela, South Africa, April 6, 2021 |  Aline Ghilardi, Brazil, March 30, 2021 |  Flavia Boscolo-Galazzo, Switzerland, March 23, 2021 |
 Heda Agić, United States, March 16, 2021 |  Ben Otoo, United States, March 9, 2021 |  Samantha Carter, United States, March 2, 2021 |
December 2020 – February 2021
 Judi Sclafani, United States February 23, 2021 |  Weimu Xu Ireland, February 16, 2021 |  Hazel Richards Australia, February 9, 2021 |
 Anne-Claire Fabre, Switzerland, February 2, 2021 |  Alyssa Atwood, United States, January 26, 2021 |  Karma Nanglu, United States, January 19, 2021 |
 Nussaibah Raja, Germany, December 8, 2020 |  Natalie Umling, United States, December 1, 2020 | |
September 2020 – November 2020
 Emma Karoune, United Kingdom November 24, 2020 |  Kaustubh Thirumalai, United States, November 17, 2020 |  Thomas Clements, United Kingdom, November 10, 2020 |
 Esther Githumbi, Sweden, November 3, 2020 |  Jamie McFarlin, United States, October 27, 2020 |  Sarah Shelley, United States, October 20, 2020 |
 Aviwe Matiwane, South Africa, October 13, 2020 |  Allison Karp, United States, October 6, 2020 |  Jorge Cardich, Peru, September 29, 2020 |
 Gabi Serrato Marks, United States, September 22, 2020 |  Aaron Martinez, United States, September 15, 2020 |  Emanuela di Martino, Norway, September 8, 2020 |
 Matthew Jones, United States, September 1, 2020 |
June 2020 – August 2020
 Charuta Kulkarni, United Kingdom, August 25, 2020 |  Caitlyn Witkowski, United Kingdom, August 18, 2020 |  Deepak Jha, India, August 11, 2020 |
 Mairin Balisi, United States, August 4, 2020 |  Emma Dunne, United Kingdom, July 28, 2020 |  Pedro Monarrez, United States, July 21, 2020 |
 Neil Brocklehurst, United Kingdom, July 7, 2020 |  Heather Jones, United States, June 30, 2020 |  Laura Haynes, United States, June 23, 2020 |
Pal(a)eoPERCS 