Published September 27, 2021 | Version Published
Book Section - Chapter Open

Site U1550

  • 1. ROR icon University of North Carolina at Chapel Hill
  • 2. ROR icon Woods Hole Oceanographic Institution
  • 3. ROR icon Forschungszentrum Jülich
  • 4. ROR icon Moss Landing Marine Laboratories
  • 5. ROR icon Rice University
  • 6. ROR icon University of Southern California
  • 7. ROR icon Chrono-Environment Laboratory
  • 8. ROR icon University of Bremen
  • 9. ROR icon Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
  • 10. ROR icon Jinan University
  • 11. ROR icon International Ocean Discovery Program
  • 12. ROR icon National Institute of Oceanography
  • 13. ROR icon Korea Institute of Geoscience and Mineral Resources
  • 14. ROR icon Plymouth University
  • 15. ROR icon California State University, Northridge
  • 16. ROR icon Stanford University
  • 17. ROR icon Japan Agency for Marine-Earth Science and Technology
  • 18. ROR icon Center for Scientific Research and Higher Education at Ensenada
  • 19. ROR icon Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • 20. ROR icon French Research Institute for Exploitation of the Sea
  • 21. ROR icon Autonomous University of Baja California
  • 22. ROR icon Second Institute of Oceanography
  • 23. ROR icon Laboratoire d'Océanologie et de Géosciences
  • 24. ROR icon Texas A&M University
  • 25. ROR icon California Institute of Technology
  • 26. ROR icon Hohai University
  • 27. ROR icon Tokyo University of Marine Science and Technology

Abstract

Site U1550 is located within the axial graben of the northern Guaymas Basin spreading segment (Figures F1F2). This site was established very close to Deep Sea Drilling Project (DSDP) Site 481 to take advantage of the known presence, depth, and characteristics of sills and indurated sediments at Site 481 (Shipboard Scientific Party, 1982), and to clarify its stratigraphy by redrilling it with improved coring tools and sampling approaches. Substantially improved recovery was expected relative to Site 481, leading to increased sampling resolution of downhole changes and enabling the use of modern microbiological approaches. The fault-bounded setting of Site U1550 provides the potential for high-flux fluid circulation in response to sill intrusion, leading to swift cooling and potentially enhanced alteration due to the rapid removal of dissolved phases and gases. The primary objectives for Site U1550 were to characterize the physical, chemical, and microbial responses to sill intrusion into sediments at a high-flux end-member location.

Copyright and License

Attribution 4.0 International CC BY 4.0.

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Additional details

Funding

National Science Foundation
OCE-1326927
European Consortium for Ocean Research Drilling
Japan Agency for Marine-Earth Science and Technology

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