ICDP Workshop on Scientific Deep Drilling in the Chad Basin

Transcription

1 ICDP Workshop on Scientific Deep Drilling in the Chad Basin - Sept 21-23, 2016, Aix-en-Provence, France - Unravelling 10 Myr of environmental and climatic changes in Africa: Implication for human migration and deep life Organization committee Florence Sylvestre, CEREGE, France sylvestre@cerege.fr Mathieu Schuster, IPGS, France mschuster@unistra.fr Moussa Abdheramane, U. N Djamena, Chad mellah03@gmail.com Nicolas Waldmann, U. Haifa, Israel nwaldmann@univ.haifa.ac.il Rachel Flecker, U. Bristol, UK ggxrf@bristol.ac.uk Hendrik Vogel, U. Bern, Switzerland hendrik.vogel@geo.unibe.ch Daniel Ariztegui, U. Geneva, Switzerland daniel.ariztegui@unige.ch

2 Goals of the workshop: - To develop scientific rationales, goals, and justification for scientific drilling in the Chad Basin - To develop a structure for the CHADRILL Project, including the science team and disciplines to be covered, logistical plans, international funding structures, industrial partnerships, and education and outreach - To discuss needs for additional site survey information in light of the existing datasets required prior to deep drilling

3 Day 1: Wednesday, Sept 21 Plenary session Room Cézanne 8:30: Welcoming remarks and introduction of participants over a coffee 9:30: Goals of the CHADRILL workshop and overview: Florence 9:45: The ICDP Program: Uli Harms Lake Chad Basin - state of the art (Chair: Daniel Ariztegui) 10:00: F. Sylvestre: Holocene to modern lake dynamics 10:20: M. Schuster: Outcrops from northern Chad 10:40: M. Abderamane: The borehole of Bol 11:00: A-E. Lebatard & S. Armitage: Possible dating avenues for Lake Chad sedimentsexamples from outcrops and boreholes 11:30: N. Waldmann: Insights into the subsurface of Lake Chad Basin from geophysical surveys 11:50: P. Deschamps & C. Bouchez: Hydrogeology in the Chad Basin

4 12:10: P. Ikhane: Chad Basin hydrocarbon occurrences and deep basin structures 12:30: Lunch break Overview presentations on major science themes pt. 1 (Chair: Math Schuster) 14:30: J.C. Larrasoaña: Dynamics of green Sahara periods and their role on hominin evolution: implications and predictions for the CHADRILL project 15:00: C. Contoux: The Sahara in a Pliocene 400ppm CO 2 world- insight from climate modelling 15:30: R. Flecker: Hydraulic connectivity of the Chad Basin and the Mediterranean Sea- a missing link for the Messinian Salinity Crisis? 16:00: D. Ariztegui: What can we learn from the Deep Subsurface Biosphere in the Chad Basin? 16:30: Coffee break Overview presentations on major science themes pt. 2 (Chair: Rachel Flecker) 17:00: C. Campisano: What can HSPDP do for you? Updates and lessons learned from the Hominid Sites and Paleolakes Drilling Project 17:30: F. Viehberg: Perspectives on adaptation of non-marine taxa in changing aquatic environments on different time scales 18:00: D. Verschuren: Using modern-analogue lake systems to constrain paleoenvironmental inferences from a deep-drilled lake-sediment sequence 18:30: U. Salzmann: Mio-Plio-Pleistocene Vegetation dynamics in North Africa 19:30: Dinner Wrap up discussion over Beer & Wine: Open Bar Day 2: Thursday, Sept 22 Rooms Cézanne & Chagall 8:30 10:00: Science Break Out Groups Group work to discuss and define the major scientific questions to be answered with CHADRILL, methods, and how to best address science priorities. Participants are encouraged to attend multiple working group meetings. 1) Group 1: PALEO (Hendrik, Nicolas) 2) Group 2: BIO (Florence, Daniel) 3) Group 3: GEO Basin stratigraphy (Mathieu, Moussa, Rachel) *Group conveners should help guide the discussion and prepare a summary 10:00: Coffee break 10:30: Summary of Science Break out Group Discussions 11: 00 12:30: Methodological Break out Groups

5 Group work to discuss methodological avenues, sampling needs and required sample volumes, on-site requirements, time-slices of particular importance, temporal resolution required for proxies etc. Furthermore: - What methods can best address thematic questions in the CHADRILL Project? - What additional science activities could set the stage for drilling success? 1) Group 1: Sedimentology & Geochemistry (Mathieu, Nicolas, Hendrik) 2) Group 2: Biological indicators & Geomicrobiology (Florence, Daniel) 3) Group 3: Chronology (Simon Armitage, Pierre Deschamps, Rachel, (Hendrik)) *Group conveners should help guide the discussion and prepare a summary 12:30: Lunch break Plenary session Room Cézanne 14:00: Summary of Methodological Break Out Group Discussions 14: 30 16:00: Overview on possible drilling targets and logistics 14: 30: Overview on local infrastructure and feasible drilling targets - Florence, Mathieu, Moussa Abdheramane: feasible drilling targets - Mahamoud Youssouf, Moussa Abdheramane, Moussa Isseini: local infrastructure 15:00: D. Nielson: Possible drilling strategies and introduction to DES 15:30: A. Norens: Drilling Operations, Core Handling, and Fundamental Analyses 16:00 Coffee break 16:30 17:30: Group discussion of drilling strategies 19:00: Dinner 21.00: Wrap up discussion over Beer & Wine: Open Bar Day 3: Friday, Sept 23 Plenary session Room Cézanne 9:00 11:00: Group Discussion and Planning - Funding strategies - Logistics - Industry partnerships - Project timeline (including timeline for submission of full proposal) - Education & Outreach - Accompanying field programs 11:30: Workshop summary and to-do-list 12:00: Lunch

6 *