Interstitial water chemistry in the sediments of Saanich Inlet

Details Interstitial water chemistry in the sediments of Saanich Inlet Interstitial water chemistry in the sediments of Saanich Inlet

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42.1011m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 42, Issue 7, pp.1011-1026

Computer Science

15

Scientific paper

Measurements of nutrients and trace metals are used to examine the processes controlling their distributions in the interstitial waters of Saanich Inlet. Samples were collected using both in situ and squeezing techniques with excellent agreement. Additional measurements of porosity, organic carbon and sedimentation rate by 210 Pb are used in conjunction with the nutrient measurements to test the equation for the diagenesis of organic matter in fine-grained, organic-rich and rapidly-accumulating sediments. Organic carbon and sulfate decrease with depth in the sediment whereas ammonia and alkalinity increase. In the zone of sulfate reduction (0-20 cm) the rate constants for sulfate reduction ( k s ), ammonia production ( k N ) and organic carbon decomposition ( k c ) agree within a factor of two. Our calculations indicate, however, that this is fortuitous since the observed decrease in paniculate organic carbon is insufficient to account for the sulfate consumption. Sulfate must also be consumed by reaction with methane diffusing up from the underlying sediments. The rate constant for sulfate reduction using particulate organic carbon is lower than a modelled rate encompassing all organic species, including methane. The rate constant for ammonia production ( k N ) decreases by an order of magnitude when sulfate is completely depleted and methane production dominates. Thermodynamic calculations suggest that the interstitial waters are saturated or supersaturated with respect to all forms of iron `monosulfides', apatite and rhodochrosite.

Affiliated with

Also associated with

No associations

Rating

Interstitial water chemistry in the sediments of Saanich Inlet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interstitial water chemistry in the sediments of Saanich Inlet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstitial water chemistry in the sediments of Saanich Inlet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1699319