Organic carbon oxidation and benthic nitrogen and silica dynamics in San Clemente Basin, a continental borderland site

Michael Bender; Richard Jahnke; Weiss Ray; William Martin; David T. Heggie; Joseph Orchardo; Todd Sowers

doi:10.1016/0016-7037(89)90011-2

Organic carbon oxidation and benthic nitrogen and silica dynamics in San Clemente Basin, a continental borderland site

Michael Bender, Richard Jahnke, Weiss Ray, William Martin, David T. Heggie, Joseph Orchardo, Todd Sowers

Earth and Environmental Systems Institute

Research output: Contribution to journal › Article › peer-review

118 Scopus citations

Abstract

Organic carbon oxidation rates in San Clemente Basin were determined by benthic chamber experiments using the Bottom Lander, along with studies of pore water chemistry. Non-steady-state diagenetic models are developed for interpreting concentration-time data from the benthic chamber experiments. O₂, NO₃^-, and SO₄^2- are all important oxidants for organic carbon at our study site. Regenerated fixed nitrogen was consumed by NO₃^- reduction. There is a flux of NO₃^- into the sediments, and the benthic flux of NH₄⁺ is undetectable. The total rate at which fixed nitrogen is removed from the oceans at this site is about twice the flux of PON to the sea floor. SiO₂ fluxes calculated from interfacial pore water gradients are in satisfactory agreement with those determined using the Lander. Most silica dissolution must therefore occur within the sediments, although interstitial profiles show that little dissolution occurs below 1 cm depth.

Original language	English (US)
Pages (from-to)	685-697
Number of pages	13
Journal	Geochimica et Cosmochimica Acta
Volume	53
Issue number	3
DOIs	https://doi.org/10.1016/0016-7037(89)90011-2
State	Published - Mar 1989

All Science Journal Classification (ASJC) codes

Geochemistry and Petrology

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10.1016/0016-7037(89)90011-2

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@article{8f4a898d4d4f4d1181c90800979b46d5,

title = "Organic carbon oxidation and benthic nitrogen and silica dynamics in San Clemente Basin, a continental borderland site",

abstract = "Organic carbon oxidation rates in San Clemente Basin were determined by benthic chamber experiments using the Bottom Lander, along with studies of pore water chemistry. Non-steady-state diagenetic models are developed for interpreting concentration-time data from the benthic chamber experiments. O2, NO3-, and SO42- are all important oxidants for organic carbon at our study site. Regenerated fixed nitrogen was consumed by NO3- reduction. There is a flux of NO3- into the sediments, and the benthic flux of NH4+ is undetectable. The total rate at which fixed nitrogen is removed from the oceans at this site is about twice the flux of PON to the sea floor. SiO2 fluxes calculated from interfacial pore water gradients are in satisfactory agreement with those determined using the Lander. Most silica dissolution must therefore occur within the sediments, although interstitial profiles show that little dissolution occurs below 1 cm depth.",

author = "Michael Bender and Richard Jahnke and Weiss Ray and William Martin and Heggie, {David T.} and Joseph Orchardo and Todd Sowers",

note = "Funding Information: Acknowledgements-We are indebtetdo many people who helped with varieda spectso f this work. Along with R.W. and R.J., A. Krause, T. Lillie, 0. Kirsten, F. Mansir, and M. Christainsen designed,b uilt, maintained,a nd deployedt he Bottom Lander. The Mastema nd crews of R/V New Horizon and R/V Melville provided sea@ng support. S. Emenon, D. McCorkle, D. Archer, C. Reimens,a nd T. Shaw participated both in the field worka ndi n many discussionsa bout the interpretationo f the data. D. Cullen and D. Kahn provideda nalytical assistance.T hree reviewen, B. Boudreau, D. Hammond, and D. McCorkle, made extensivec omments which helped us improve the manuscript. This research was supported by the National science Foundation.",

year = "1989",

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doi = "10.1016/0016-7037(89)90011-2",

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pages = "685--697",

journal = "Geochimica et Cosmochimica Acta",

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T1 - Organic carbon oxidation and benthic nitrogen and silica dynamics in San Clemente Basin, a continental borderland site

AU - Bender, Michael

AU - Jahnke, Richard

AU - Ray, Weiss

AU - Martin, William

AU - Heggie, David T.

AU - Orchardo, Joseph

AU - Sowers, Todd

N1 - Funding Information: Acknowledgements-We are indebtetdo many people who helped with varieda spectso f this work. Along with R.W. and R.J., A. Krause, T. Lillie, 0. Kirsten, F. Mansir, and M. Christainsen designed,b uilt, maintained,a nd deployedt he Bottom Lander. The Mastema nd crews of R/V New Horizon and R/V Melville provided sea@ng support. S. Emenon, D. McCorkle, D. Archer, C. Reimens,a nd T. Shaw participated both in the field worka ndi n many discussionsa bout the interpretationo f the data. D. Cullen and D. Kahn provideda nalytical assistance.T hree reviewen, B. Boudreau, D. Hammond, and D. McCorkle, made extensivec omments which helped us improve the manuscript. This research was supported by the National science Foundation.

PY - 1989/3

Y1 - 1989/3

N2 - Organic carbon oxidation rates in San Clemente Basin were determined by benthic chamber experiments using the Bottom Lander, along with studies of pore water chemistry. Non-steady-state diagenetic models are developed for interpreting concentration-time data from the benthic chamber experiments. O2, NO3-, and SO42- are all important oxidants for organic carbon at our study site. Regenerated fixed nitrogen was consumed by NO3- reduction. There is a flux of NO3- into the sediments, and the benthic flux of NH4+ is undetectable. The total rate at which fixed nitrogen is removed from the oceans at this site is about twice the flux of PON to the sea floor. SiO2 fluxes calculated from interfacial pore water gradients are in satisfactory agreement with those determined using the Lander. Most silica dissolution must therefore occur within the sediments, although interstitial profiles show that little dissolution occurs below 1 cm depth.

AB - Organic carbon oxidation rates in San Clemente Basin were determined by benthic chamber experiments using the Bottom Lander, along with studies of pore water chemistry. Non-steady-state diagenetic models are developed for interpreting concentration-time data from the benthic chamber experiments. O2, NO3-, and SO42- are all important oxidants for organic carbon at our study site. Regenerated fixed nitrogen was consumed by NO3- reduction. There is a flux of NO3- into the sediments, and the benthic flux of NH4+ is undetectable. The total rate at which fixed nitrogen is removed from the oceans at this site is about twice the flux of PON to the sea floor. SiO2 fluxes calculated from interfacial pore water gradients are in satisfactory agreement with those determined using the Lander. Most silica dissolution must therefore occur within the sediments, although interstitial profiles show that little dissolution occurs below 1 cm depth.

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ER -

Organic carbon oxidation and benthic nitrogen and silica dynamics in San Clemente Basin, a continental borderland site

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