nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (1): toevoegen | toon Print deze pagina

one publication added to basket [239866]
The importance of shallow hydrothermal island arc systems in ocean biogeochemistry
Hawkes, J.A.; Connelly, D.P.; Rijkenberg, M.J.A.; Achterberg, E.P. (2014). The importance of shallow hydrothermal island arc systems in ocean biogeochemistry. Geophys. Res. Lett. 41(3): 942-947. dx.doi.org/10.1002/2013GL058817
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Author keywords
    iron; hydrothermal; colloid; island arc; scavenging; caldera

Auteurs  Top 
  • Hawkes, J.A.
  • Connelly, D.P.
  • Rijkenberg, M.J.A., meer
  • Achterberg, E.P.

Abstract
    Hydrothermal venting often occurs at submarine volcanic calderas on island arc chains, typically at shallower depths than mid-ocean ridges. The effect of these systems on ocean biogeochemistry has been under-investigated to date. Here we show that hydrothermal effluent from an island arc caldera was rich in Fe(III) colloids (0.02-0.2 mu m; 46% of total Fe), contributing to a fraction of hydrothermal Fe that was stable in ocean water. Iron(III) colloids from island arc calderas may be transferred into surrounding waters (generally 0-1500m depth) by ocean currents, thereby potentially stimulating surface ocean primary productivity. Hydrothermal Fe oxyhydroxide particles (>0.2 mu m) were also pervasive in the studied caldera and contained high concentrations of oxyanions of phosphorus (P), vanadium (V), arsenic (As), and manganese (Mn). Hydrothermal island arcs may be responsible for>50% of global hydrothermal P scavenging and>40% V scavenging, despite representing <10% of global hydrothermal fluid flow.
    Key Points
    A large portion of iron from hydrothermal island arc calderas exists as colloids These colloids coprecipitate important amounts of dissolved oxyanions Iron colloids from hydrothermal island arcs may stimulate primary productivity

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .