OS022
Research, Exploration, and Challenges in the Hadal Zone and Deep Ocean Trenches

Session ID#: 157760

Session Description:
The deepest parts of our planet’s ocean remain the least explored places on Earth. In the extreme depths of the hadal zone and deep ocean trenches (down to 11 km depth), recent engineering developments have allowed the scientific community to take a first glimpse at the chemical, geological, and biological diversity associated with these challenging environments. These regions can be associated with active fluid percolation processes, unique Moho exposures, and previously unknown ecosystems comprising hundreds of deep-sea animal species. However, much remains to be discovered. This session aims to survey current and catalyze future scientific and engineering efforts by the international community to explore and understand these fascinating environments, which may also serve as analogs to conditions on other ocean worlds.
Index Terms:

0450 Hydrothermal systems [BIOGEOSCIENCES]
0456 Life in extreme environments [BIOGEOSCIENCES]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
3080 Submergence instruments: ROV, AUV, submersibles [MARINE GEOLOGY AND GEOPHYSICS]

Primary Convener:  Véronique Le Roux, Woods Hole Oceanographic Institution, Geology & Geophysics Department, Woods Hole, MA, United States
Conveners:  Yasuhiko Ohara, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Timothy M Shank, Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA, United States and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
Exploring Earth's Last Frontier: On the Need and Opportunity for an International Interdisciplinary Effort to Investigate Oceanic Trenches, Discover New Seafloor Vents, and Study Them (1052957)
Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States
 
Origin of Hadal Sediments in the Challenger Deep (1070975)
Xiaotong Peng1, Tongtong Xie1,2 and Shuangquan Liu3, (1)Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China, (2)University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China, (3)Sanya, Hainan, CHINA
 
Rapid Deposition and Intense Mineralization of Organic Matter Drive Marine Silicate Weathering in the Japan Trench: Initial Results From IODP Expedition 386 (1071664)
Min Luo, Shanghai Ocean University, College of Marine Sciences, Lingang, China, Natascha Riedinger, University of California Riverside, Riverside, United States, Christian März, University of Leeds, Leeds, United Kingdom, Marta E Torres, Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Troy Rasbury, Stony Brook University, Stony Brook, United States, Susanne M Straub, Lamont Doherty Earth Observato, Palisades, NY, United States, Rui Bao, Ocean University of China, Qingdao, China, Piero Bellanova, University of Münster, Institut für Geologie und Paläontologie, Münster, Germany, Jez Everest, British Geological Survey, The Lyell Centre, Edinburgh, United Kingdom, Ken Ikehara, Geological Survey of Japan, AIST, Tsukuba, Japan, Michael Strasser, University of Innsbruck, Institute of Geology, Innsbruck, Austria and IODP Expedition 386 Science Party
 
Investigating Water Column Fauna in the Marianas (1072438)
Isabel Moyer, Jupiter, Florida, UNITED STATES, Adrienne Copeland, NOAA Office of Ocean Exploration and Research, Silver Spring, United States, Katharine Egan, NOAA Ocean Exploration, Silver Spring, MD, United States and Allen Collins, Smithsonian National Museum of Natural History, Invertebrate Zoology, Washington, DC, United States
 
Magnetite in hadal foraminifera (1078367)
Hao Yang, Sanya Institute of Deep-sea Science and Engineering Chinese Academy of Sciences, Sanya, hainan, VATICAN and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
Initial Results from DSV Limiting Factor Dive 115 to Challenger Deep, July 2022, Including First Successful Operation of a Sidescan Sonar at Full Ocean Depth (Invited) (1087662)
Dawn J Wright1, Victor Vescovo2, Tim Macdonald2, Rob McCallum3 and Jeremie Morizet4, (1)Environmental Systems Research Institute, Redlands, CA, United States, (2)Caladan Oceanic LLC, Dallas, United States, (3)EYOS Expeditions Ltd., Douglas, Isle of Man, United Kingdom, (4)Deep Ocean Search Ltd., Port Louis, Mauritius
 
Hydrothermal derived manganese deposits at bending-related normal faults of Mariana incoming plate (1104155)
Hengchao Xu, Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
Geochemical nature of seafloor basalts recovered from the Challenger Deep and implications for geochemical variations of Mariana arc magmas (1104318)
Wenjing Xu, Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, Deep Sea Science Division, Sanya, China, Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China, Robert J Stern, University of Texas at Dallas, Geosciences, Richardson, TX, United States, Xisheng Xu, Nanjing University, Nanjing, China and Hengchao Xu, Sanya Institute of Deep-sea Science and Engineering, Deep-sea Science Division, Sanya, China
 
Molybdenum isotope signature in the subduction zone sediments (1104330)
Shun Chen, Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China, Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China and Jie Li, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
 
A novel iron mineralization in the Challenger Deep (1104537)
Shuangquan Liu, Institute of Deep-sea Science and Engineering, CAS, Sanya, China and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
Serpentinized Peridotites from the Challenger Deep (1113637)
Kaiwen Ta, Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
The Biogeochemical Mn Cycle in Sedimentary Environments of the Mariana Trench (1133813)
Ji-wei Li, CAS Chinese Academy of Sciences, Beijng, China, Ling Li, Chinese Academy of Sciences, Sanya, China and Xiaotong Peng, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China
 
Classic Oceanic Crustal Section Recovered by Alvin Submersible Divers from the Puerto Rico Trench North Wall (1153133)
Kenneth Howard Rubin1, Frieder Klein2, Samuel Soule3, Ashley M Burkett4, Wilford E Schmidt5, Jason Almeida3, Sabrina Douglas6 and David Davis7, (1)University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States, (2)Woods Hole Oceanographic Inst., Woods Hole, MA, United States, (3)University of Rhode Island, Narragansett, United States, (4)Oklahoma State University, Boone Pickens School of Geology, Stillwater, OK, United States, (5)University of Puerto Rico Mayaguez, Mayaguez, PR, United States, (6)Cayman Island Government, Dept. of Environment, Georgetown, Cayman Islands, (7)Rutgers University, Marine Sciences, Piscataway, United States
 
AN UPGRADED HOV ALVIN FOR ABYSSAL AND HADAL SCIENCE (1170610)
Samuel A Soule, University of Rhode Island - Graduate School of Oceanography, Narragansett, United States, Anna Michel, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States and Alvin Science Verification Team
 
Anoxic and Oxic Subseafloor Sediment in the Puerto Rico Trench Region (1194205)
Steven D'Hondt1, Dennis Graham2, Robert A. Pockalny1, Sofia Rivera Soto3, David C Smith4, Barbara Saucedo5, Jelis Sostre-Cortes6, Arthur J Spivack7 and AR64-02 Shipboard Scientific Party, (1)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (2)University of Rhode Island - GSO, Oceanography, Narragansett, United States, (3)University of Puerto Rico - Mayagüez, Chemical Engineering, Mayagüez, United States, (4)Univ Rhode Island, Narragansett, RI, United States, (5)University of California San Diego, Biological Sciences, La Jolla, United States, (6)University of Puerto Rico Mayaguez, Geology, Mayaguez, United States, (7)University of Rhode Island - GSO, Narragansett, United States
 
Advancing Autonomous Underwater Vehicle Robotics for Full-Ocean Depth Exploration and Research (1196098)
Timothy M Shank, Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA, United States, Casey Machado, Woods Hole Oceanographic Inst., Woods Hole, MA, United States, Russell Smith, NASA JPL, Pasadena, United States, Jason Kapit, WHOI, Department of Applied Ocean Physics & Engineering, Woods Hole, MA, United States, Anna Michel, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States, Donald B Nuzzio, Analytical Instrument Systems, Inc., Flemington, NJ, United States, Victor Naklicki, WHOI, Woods Hole, United States, Taylor P Heyl, Woods Hole Oceanographic Institution, Biology, Woods Hole, MA, United States and Andrew Klesh, NASA Jet Propulsion Laboratory, Pasadena, CA, United States
 
A new multidisciplinary tool for observing the Hadal Water Column (1196628)
Glenn S Carter1, Jeffrey Drazen2, Bruce M Howe3, Chris I Measures4 and Mariko Hatta4, (1)University of Hawaii at Manoa, Oceanography, Honolulu, United States, (2)University of Hawai'i at Mānoa, Department of Oceanography, Honolulu, United States, (3)University of Hawaii at Manoa, Honolulu, HI, United States, (4)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States
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