TY - JOUR
T1 - Workshop report
T2 - Afar Dallol Drilling - ONset of sedimentary processes in an active rift basin (ADD-ON)
AU - The Add-On Workshop Consortium
AU - Foubert, Anneleen
AU - Keir, Derek
AU - Atnafu, Balemwal
AU - Kidane, Tesfaye
AU - Abebe, Bekele
AU - Asegahegn, Bahru
AU - Assen, Abate Melaku
AU - Ayele, Atalay
AU - Bastow, Ian
AU - Bedassa, Gemechu
AU - Birhanu, Behailu
AU - Chernet, Samuel
AU - Cheviet, Alban
AU - Endeshaw, Addis Hailu
AU - Galerne, Christophe
AU - Gebru, Ermias Filfilu
AU - Gelaw, Mekbib Fekadu
AU - Getaneh, Worash
AU - Hagos, Miruts
AU - Haile, Henok
AU - Hailu, Binyam
AU - Heeschen, Katja
AU - Hurman, Gareth
AU - Hutchison, William
AU - Kawasaki, Kazuo
AU - La Rosa, Alessandro
AU - Garcia, P. L.
AU - McNeill, Lisa
AU - Moreira, David
AU - Muluneh, Ameha
AU - Negga, Haileyesus
AU - Pagli, Carolina
AU - Rime, Valentin
AU - Spencer-Jones, Charlotte
AU - Tadesse, Amdemichael
AU - Tafesse, Tsedenya
AU - Varet, Jacques
AU - Waldmann, Nicolas
AU - Watts, Emma
AU - Yirgu, Gezahegn
AU - Zwaan, Frank
AU - Adefris, Damenu
AU - Ali, Yasin Kadir
AU - Amene, Serawit
AU - Bekele, Belay Yonas
AU - Bohnhoff, Marco
AU - Fantu, Yitemgeta
AU - Gardo, Ismael Ali
AU - Mamo, Tadesse
AU - Megdelawit, Wonde
N1 - Publisher Copyright:
Copyright © 2024 Anneleen Foubert et al.
PY - 2024/8/30
Y1 - 2024/8/30
N2 - Rifts and rifted margins form when continents break apart and shape the continent-to-ocean transition on much of our planet. The sedimentary basins that result from continental rifting host unique sedimentary archives of palaeo-environmental and palaeo-climatic change required to understand complex natural processes. Rifts and rifted margins are key sites for natural resources (e.g. geothermal and hydrogen potential, critical metal resources, and CO2 storage) and have an important societal relevance in the mitigation of geohazards such as earthquakes and volcanic activity. However, knowledge on the tectonic structure, sedimentary architecture, rapid palaeo-environmental change, fluid flow and hydrothermal circulation, deep subsurface biosphere, and their impacts on biogeochemical fluxes in rift basins remains poorly understood. Considering their large scientific potential and societal relevance, understanding the formation and architecture of rifts and rifted margins is now critical. The Afar rift is a world-class natural field lab where continental breakup can be directly observed. The northern part of Afar, the Danakil Depression, especially represents a unique snapshot in space and time when the continent ruptures and new seafloor and adjacent rifted margins form. However, deep subsurface records are missing in the basin. The ADD-ON project aims at deep drilling in the Danakil Depression to provide a unique sedimentary record in an active rift basin paced by global environmental fluctuations and their interplay with volcanic and tectonic events. To explore drilling targets and address scientific drilling objectives, an International Continental Scientific Drilling Program (ICDP) workshop was organized in Addis Ababa, Ethiopia, in August 2023. In total, 64 participants from 10 countries and all career stages respecting diversity and inclusion joined the workshop. They represented a wide range of scientific disciplines including government agencies, industry, local universities, and communities to discuss the overall ADD-ON science plan during several workshop sessions. One target drilling site has been flagged, covering the unique Pleistocene full syn-rift sedimentary record in the Danakil Depression. This unique sedimentary archive will allow us to (1) unravel complex palaeo-environmental change in a rift basin, (2) understand incipient and intermittent dynamics through punctuated volcano-tectonic events in a rift transitioning from continental rifting towards seafloor spreading and adjacent rifted margin development, (3) test the origin and limits of life in the deep biosphere under poly-extreme conditions, (4) better understand fluid flow and fluid-sediment interaction in an active hydrothermal system, and (5) use the drilling site to develop a downhole Earth observatory to improve hazard-related monitoring capacity (earthquakes, gas/fluid flux, ground motion).
AB - Rifts and rifted margins form when continents break apart and shape the continent-to-ocean transition on much of our planet. The sedimentary basins that result from continental rifting host unique sedimentary archives of palaeo-environmental and palaeo-climatic change required to understand complex natural processes. Rifts and rifted margins are key sites for natural resources (e.g. geothermal and hydrogen potential, critical metal resources, and CO2 storage) and have an important societal relevance in the mitigation of geohazards such as earthquakes and volcanic activity. However, knowledge on the tectonic structure, sedimentary architecture, rapid palaeo-environmental change, fluid flow and hydrothermal circulation, deep subsurface biosphere, and their impacts on biogeochemical fluxes in rift basins remains poorly understood. Considering their large scientific potential and societal relevance, understanding the formation and architecture of rifts and rifted margins is now critical. The Afar rift is a world-class natural field lab where continental breakup can be directly observed. The northern part of Afar, the Danakil Depression, especially represents a unique snapshot in space and time when the continent ruptures and new seafloor and adjacent rifted margins form. However, deep subsurface records are missing in the basin. The ADD-ON project aims at deep drilling in the Danakil Depression to provide a unique sedimentary record in an active rift basin paced by global environmental fluctuations and their interplay with volcanic and tectonic events. To explore drilling targets and address scientific drilling objectives, an International Continental Scientific Drilling Program (ICDP) workshop was organized in Addis Ababa, Ethiopia, in August 2023. In total, 64 participants from 10 countries and all career stages respecting diversity and inclusion joined the workshop. They represented a wide range of scientific disciplines including government agencies, industry, local universities, and communities to discuss the overall ADD-ON science plan during several workshop sessions. One target drilling site has been flagged, covering the unique Pleistocene full syn-rift sedimentary record in the Danakil Depression. This unique sedimentary archive will allow us to (1) unravel complex palaeo-environmental change in a rift basin, (2) understand incipient and intermittent dynamics through punctuated volcano-tectonic events in a rift transitioning from continental rifting towards seafloor spreading and adjacent rifted margin development, (3) test the origin and limits of life in the deep biosphere under poly-extreme conditions, (4) better understand fluid flow and fluid-sediment interaction in an active hydrothermal system, and (5) use the drilling site to develop a downhole Earth observatory to improve hazard-related monitoring capacity (earthquakes, gas/fluid flux, ground motion).
UR - http://www.scopus.com/inward/record.url?scp=85203140893&partnerID=8YFLogxK
U2 - 10.5194/sd-33-207-2024
DO - 10.5194/sd-33-207-2024
M3 - Article
AN - SCOPUS:85203140893
SN - 1816-8957
VL - 33
SP - 207
EP - 218
JO - Scientific Drilling
JF - Scientific Drilling
IS - 2
ER -