1887

Abstract

Summary

Floodplain shales are abundant in the distal part of dryland fluvial fans fringing endorheic basins, such as the Río Colorado fluvial system in Bolivia. In a low-gradient coastal plain, lowstand progradation of a fluvial system creates accommodation space. Long periods of low-flow stage only support a single channel, decreasing in capacity downstream. Flooding during short episodes of peak runoff results in massive overbank deposition and aggradation of the floodplain around the active channel. Assuming a constant flow capacity, this is mirrored by an elevation of the channel floor, combining to form an elongated lobe of up to several kilometres in width. Distributary channels within crevasse splays develop reflux phenomena, effectively decreasing the flow capacity of their parent channel. This, combined with the decreased gradient of the active channel profile, causes an upstream increase in avulsion proneness and is a dominant control on the autocyclic switching of channel belts in a process of large-scale compensational stacking. The resulting stratigraphy is heterogeneous and may have tough gas reservoir potential.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201600400
2016-05-02
2024-03-28
Loading full text...

Full text loading...

References

  1. Bridge, J.S.
    [2006] Fluvial facies models: recent developments. In: Posamentier, H.W. and Walker, R.G. (Eds) Facies models revisited. SEPM Special Publications, 84, 85–170.
    [Google Scholar]
  2. Dalman, R., Weltje, G.J. and Karamitopoulos, P.
    [2015] High-resolution sequence stratigraphy of fluvio-deltaic systems: Prospects of system-wide chronostratigraphic correlation. Earth and Planetary Science Letters, 412, 10–17.
    [Google Scholar]
  3. Donselaar, M.E., Cuevas Gozalo, M.C., and Moyano, S.
    [2013] Avulsion processes at the terminus of low-gradient semi-arid fluvial systems: Lessons from the Río Colorado, Altiplano endorheic basin, Bolivia. Sedimentary Geology, 283, 1–14.
    [Google Scholar]
  4. Li, J., Donselaar, M.E., Hosseini Aria, S.E., Koenders, R., and Oyen, A.M.
    [2014] Landsat imagery-based visualization of the geomorphological development at the terminus of a dryland river system. Quaternary International, 352, 100–110.
    [Google Scholar]
  5. Nichols, G.J. and Fisher, J.A.
    [2007] Processes, facies and architecture of fluvial distributary system deposits. Sedimentary Geology, 195, 75–90.
    [Google Scholar]
  6. Parkinson, B.W. and Enge, P.K.
    [1996] Differential GPS. In: Parkinson, B.W. and J.J.SpilkerJr., (Eds) Global Positioning System: Theory and Applications, Vollume II. Progress in Astronautics and Aeronautics, 164, 3–50.
    [Google Scholar]
  7. Smith, J.S., Chandler, J., and Rose, J.
    [2009] High spatial resolution data acquisition for the geosciences: kite aerial photography. Earth Surface Processes and Landforms, 34, 155–161.
    [Google Scholar]
  8. Wallinga, J.
    [2002] Optically stimulated luminescence dating of fluvial deposits: a review. Boreas, 31, 303–322.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201600400
Loading
/content/papers/10.3997/2214-4609.201600400
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error