1887
Volume 36, Issue 5
  • E-ISSN: 1365-2117
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Abstract

[

A ca. 300 km2 gravity slide moved down the back slope of the Snorre fault rift block during North Sea rifting. Associated deep slump complexes developed where the slide ruptured above active underlying rift faults.

, Abstract

Continental rifts are characterized by up to 30 km wide rotated fault blocks with stratigraphic dip away from the central rift axis. Although gravity‐induced mass movements are well known features of collapsed fault block crests, I here demonstrate the occurrence of polymodal gravity‐driven mass transport down the back slope of a first‐order rift fault block. I identify (1) early sliding related to syntectonic crestal collapse of second‐order rift faults, (2) large‐scale bed‐parallel sliding of the L‐M Jurassic sedimentary package, and (3) the accumulation of two 7 km long, 1–2 km wide and up to 750 m thick volumes of complexly slumped material in the hanging walls of two ramp‐forming faults. Early sliding is documented by 100 m of repeated Brent Group stratigraphy in a cored well in the study area (well 34/4‐15A). These smaller slides have intact internal stratigraphy but show elevated deformation band densities. The seismic data also show evidence for ca. 2 km of massive translational sliding of the ca. 400 m thick and ca. 300 km2 large Jurassic section above a lowermost Jurassic bedding‐parallel detachment. This translational slide did not deform much internally, except for ductile folding where it slid over underlying active rift faults. Chaotic seismic facies in fault hanging walls are interpreted as contorted Jurassic beds, formed by multiple slumping and sliding events that stacked mobilized sediments into a 750 m thick column. These complex slump volumes occur where fault displacement is highest along two relayed faults. A model is favoured where the large translational slide ruptured with an opening of space against the fault that was progressively filled with slumped material from the footwall. While the large‐scale translational sliding only caused moderate internal subseismic deformation, early sliding and, particularly, the complex slumping caused significant internal deformation. This study shows the importance of carefully searching for and distinguishing between different types of mass movement in rift systems.

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2024-11-14
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References

  1. Alsop, G. I., & Marco, S. (2011). Soft‐sediment deformation within Seismogenic slumps of the Dead Sea Basin. Journal of Structural Geology, 33, 433–457.
    [Google Scholar]
  2. Alsop, G. I., Marco, S., Weinberger, R., & Levi, T. (2024). Slide Stacking: A new mechanism to repeat stratigraphic sequences during gravity‐driven extension. Journal of Structural Geology, 185, ARTN 105184. https://doi.org/10.1016/j.jsg.2024.105184
    [Google Scholar]
  3. Ballas, G., Fossen, H., & Soliva, R. (2015). Factors controlling permeability of cataclastic deformation bands and faults in porous sandstone reservoirs. Journal of Structural Geology, 76, 1–21.
    [Google Scholar]
  4. Baltzer, A. (1875). Über bergstürze in den Alpen (p. 50). Verlag der Schabelitz'schen buchhandlung (C. Schmidt).
    [Google Scholar]
  5. Berger, M., & Roberts, A. M. (Eds.). (1999). The zeta structure: A footwall degradation complex formed by gravity sliding on the Western margin of the Tampen spur, northern North Sea. In Petroleum geology of Northwest Europe: Proceedings of the 5th conference (Vol. 5, pp. 107–116). Geological Society of London.
    [Google Scholar]
  6. Biari, Y., Klingelhoefer, F., Franke, D., Funck, T., Loncke, L., Sibuet, J.‐C., Basile, C., Austin, J. A., Rigoti, C. A., Sahabi, M., Benabdellouahed, M., & Roest, W. R. (2021). Structure and evolution of the Atlantic passive margins: A review of existing rifting models from wide‐angle seismic data and kinematic reconstruction. Marine and Petroleum Geology, 126, 104898. https://doi.org/10.1016/j.marpetgeo.2021.104898
    [Google Scholar]
  7. Brun, J.‐P., & Fort, X. (2011). Salt tectonics at passive margins: Geology versus models. Marine and Petroleum Geology, 28, 1123–1145.
    [Google Scholar]
  8. Bryn, P., Berg, K., Forsberg, C. F., Solheim, A., & Kvalstad, T. J. (2005). Explaining the Storegga slide. Marine and Petroleum Geology, 22, 11–19.
    [Google Scholar]
  9. Chen, B., Zhu, C., Feng, Y., Han, X., Zeng, W., Xing, C., Lin, S., & Liu, G. (2021). Underestimated angle of submarine slope at failure: A short discussion. E3S Web of Conferences, 293, 2057. https://doi.org/10.1051/e3sconf/202129302057
    [Google Scholar]
  10. Coutts, S. D., Larsson, S. Y., & Rosman, R. (1996). Development of the slumped Crestal area of the Brent reservoir, Brent field: An integrated approach. Petroleum Geoscience, 2, 219–229.
    [Google Scholar]
  11. Cruden, D. M., & Varnes, D. J. (1996). Landslide types and processes. In A. K.Turner & R. L.Schuster (Eds.), Landslides investigation and mitigation (Special Report No. 247), Chapter 3 (pp. 36–75). U.S. National Academy of Science.
    [Google Scholar]
  12. Dahl, N., & Solli, T. (1993). The structural evolution of the snorre field and surrounding areas. In J. R.Parker (Ed.), Petroleum geology of Northwest Europe: Proceedings of the 4th conference (Vol. 4, pp. 1159–1166). Geological Society, London.
    [Google Scholar]
  13. Færseth, R. B. (1996). Interaction of Permo‐Triassic and Jurassic extensional fault‐blocks during the development of the northern North Sea. Geological Society of London, 153, 931–944.
    [Google Scholar]
  14. Fossen, H. (2016). Structural geology (2nd ed., p. 510). Cambridge University Press.
    [Google Scholar]
  15. Fossen, H., & Bale, A. (2007). Deformation bands and their influence on fluid flow. American Association of Petroleum Geologists Bulletin, 91, 1685–1700.
    [Google Scholar]
  16. Fossen, H., & Hesthammer, J. (2000). Possible absence of small faults in the Gullfaks field, northern North Sea: Implications for downscaling of faults in some porous sandstones. Journal of Structural Geology, 22, 851–863.
    [Google Scholar]
  17. Fossen, H., Odinsen, T., Færseth, R. B., & Gabrielsen, R. H. (2000). Detachments and low‐angle faults in the northern North Sea rift system. Dynamics of the Norwegian margins. Geological Society of London, Special Publication, 167, 105–131.
    [Google Scholar]
  18. Fossen, H., & Rotevatn, A. (2016). Fault linkage and relay structures in extensional settings—A review. Earth‐Science Reviews, 154, 14–28.
    [Google Scholar]
  19. Fossen, H., Schultz, R. A., Shipton, Z. K., & Mair, K. (2007). Deformation bands in sandstone—A review. Geological Society of London, 164, 755–769.
    [Google Scholar]
  20. Gibbons, K. A., Jourdan, C. A., & Hesthammer, J. (2003). The Statfjord field, blocks 33/9, 33/12 Norwegian sector, blocks 211/24, 211/25 UK sector, Northern North Sea. Geological Society, London Memoir, London, 20, 335–353.
    [Google Scholar]
  21. Hesthammer, J., & Fossen, H. (1999). Evolution and geometries of gravitational collapse structures with examples from the Statfjord Field, Northern North Sea. Marine and Petroleum Geology, 16, 259–281.
    [Google Scholar]
  22. Hesthammer, J., & Fossen, H. (2001). Structural Core analysis from the Gullfaks area, northern North Sea. Marine and Petroleum Geology, 18, 411–439.
    [Google Scholar]
  23. Hungr, O., Leroueil, S., & Picarelli, L. (2013). The Varnes classification of landslide types, an update. Landslides, 11, 167–194.
    [Google Scholar]
  24. Lister, G. S., Etheridge, M. A., & Symonds, P. A. (1986). Detachment faulting and the evolution of passive continental margins. Geology, 14, 246–250.
    [Google Scholar]
  25. Long, J. J., & Imber, J. (2011). Geological controls on fault relay zone scaling. Journal of Structural Geology, 33, 1790–1800.
    [Google Scholar]
  26. Mcleod, A. E., & Underhill, J. R. (1999). Processes and products of footwall degradation, northern Brent field, northern North Sea. In A. J.Fleet & S. A. R.Boldy (Eds.), Petroleum geology of Northwest Europe, Proceedings of the 5th conference (pp. 91–106). Geological Society of London.
    [Google Scholar]
  27. Micallef, A., Masson, D. G., Berndt, C., & Stow, D. A. V. (2007). Morphology and mechanics of submarine spreading: A case study from the Storegga slide. Journal of Geophysical Research: Earth Surface, 112, F000739.
    [Google Scholar]
  28. Odinsen, T., Christiansson, P., Gabrielsen, R. H., Faleide, J. I., & Berge, A. (2000). The geometries and deep structure of the northern North Sea. In A. E. A.Nøttvedt (Ed.), Dynamics of the Norwegian margin (Vol. 167, pp. 41–57). Geological Society Special Publications.
    [Google Scholar]
  29. Posamentier, H., & Martinsen, O. J. (2011). The character and genesis of submarine mass‐transport deposits: Insights from outcrop and 3d seismic data. SEPM Special Publication, 95, 7–38.
    [Google Scholar]
  30. Reches, Z. (1978). Analysis of faulting in three‐dimensional strain field. Tectonophysics, 47, 109–129.
    [Google Scholar]
  31. Roberts, A. M., Kusznir, N. J., Yielding, G., & Beeley, H. (2019). Mapping the bathymetric evolution of the Northern North Sea: From Jurassic Synrift Archipelago through Cretaceous–tertiary post‐rift subsidence. Petroleum Geoscience, 25, 306–321.
    [Google Scholar]
  32. Stow, D. A. V. (1986). Deep clastic seas. In H. G.Reading (Ed.), Sedimentary environments and facies (pp. 399–444). Blackwell Scientific Publications.
    [Google Scholar]
  33. Tomasso, M., Underhill, J. R., Hodgkinson, R. A., & Young, M. J. (2008). Structural styles and depositional architecture in the Triassic of the Ninian and Alwyn north fields: Implications for basin development and Prospectivity in the northern North Sea. Marine and Petroleum Geology, 25, 588–605.
    [Google Scholar]
  34. Tucker, M. E. (2003). Sedimentary rocks in the field. In The geological field guide series (p. 234). Wiley.
    [Google Scholar]
  35. Underhill, J. R., Sawyer, M. J., Hodgson, P., Shallcross, M. D., & Gawthorpe, R. L. (1997). Implications of fault scarp degradation for Brent Group Prospectivity, Ninian field, northern north Sea1. American Association of Petroleum Geologists Bulletin, 81, 999–1022.
    [Google Scholar]
  36. Varnes, D. J. (1954). Landslide types and processes. In E. B.Eckel (Ed.), Landslides and engineering practice (Special Report No. 28). Highway research board (pp. 20–47). National Academy of Sciences.
    [Google Scholar]
  37. Varnes, D. J. (1978). Slope movement types and processes. In R. L.Schuster & R. J.Krizek (Eds.), Landslides, analysis and control, special report 176: Transportation research board (pp. 11–33). National Academy of Sciences.
    [Google Scholar]
  38. Vendeville, B., & Cobbold, P. R. (1988). How Normal faulting and sedimentation interact to produce Listric fault profiles and stratigraphic wedges. Journal of Structural Geology, 10, 649–659.
    [Google Scholar]
  39. Welbon, A. I. F., Brockbank, P. J., Brunsden, D., & Olsen, T. S. (2007). Characterizing and producing from reservoirs in landslides: Challenges and opportunities. Geological Society, London, Special Publications, 292, 49–74.
    [Google Scholar]
  40. Wu, N., Jackson, C. A. L., Johnson, H. D., Hodgson, D. M., Clare, M. A., Nugraha, H. D., & Li, W. (2021). The formation and implications of Giant blocks and fluid escape structures in submarine lateral spreads. Basin Research, 33, 1711–1730.
    [Google Scholar]
  41. Yielding, G., Badley, M. E., & Roberts, A. M. (1992). The structural evolution of the Brent Province. In A. C.Morton, R. S.Haszeldine, M. R.Giles, & S.Brown (Eds.), Geology of the Brent Group (Vol. 61, pp. 27–43). Geological Society Special Publications.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): gravity tectonics; North Sea rift; rift‐related slumping; submarine landslides

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