Geo-Marine Letters

, Volume 4, Issue 2, pp 125–130 | Cite as

Distribution and chemistry of manganese, iron, and suspended particulates in Orca Basin

  • John H. Trefry
  • Bob J. Presley
  • Wendy L. Keeney-Kennicutt
  • Robert P. Trocine


The intense halocline and redoxcline in the Orca Basin, northwest Gulf of Mexico, induce dramatic water column profiles for manganese, iron, and suspended particulates. Within a 17 m interval, the salinity of the basin water increases from 66 to ≈260 & permil and dissolved oxygen decreases to zero. Midway through this transition zone, concentrations of suspended matter peak at ≈900 μg/liter. Dissolved iron and manganese concentrations in the anoxic brine increase from oceanic values to maxima of 1.6 and 22 mg/liter, respectively. Upward migration of dissolved manganese from the brine leads to production of manganese-rich particles in the slightly oxygenated overlying water.


Oxygen Iron Migration Manganese Dissolve Oxygen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag New York Inc 1984

Authors and Affiliations

  • John H. Trefry
    • 1
  • Bob J. Presley
    • 2
  • Wendy L. Keeney-Kennicutt
    • 2
  • Robert P. Trocine
    • 1
  1. 1.Department of Oceanography and Ocean EngineeringFlorida Institute of TechnologyMelbourne
  2. 2.Department of OceanographyTexas A & M UniversityCollege Station

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