Abstract
The nitrogen isotope ratios of 42 sediment samples of total nitrogen and 38 dissolved pore-water ammonium samples from Santa Barbara Basin sediment cores were measured. The range of delta/sup 15/N values for total nitrogen was +2.89 to +9.4 per thousand with a mean of +6.8 per thousand and for pore water ammonium, +8.2 to +12.4 per thousand with a mean of 10.2 per thousand. The results suggest that the dissolved ammonium in the pore water is produced from bacterial degradation of marine organic matter. The range of delta /sup 15/N values for total nitrogen in the sediment is interpreted as resulting from an admixture of nitrogen derived from marine (+10 per thousand) and terrestrial (+2 per thousand) cores. The marine component of this mixture, composed principally of calcium carbonate with smaller amounts of opal and organic matter, contains approximately 1.0% nitrogen. The terrestrial component, which comprises over 80% of the sediment, contains approximately 0.1% organically bound nitrogen and accounts for > 25% of the total nitrogen in Santa Barbara Basin sediment.
Sweeney, R E;
Kaplan, I R
[1]
- California Univ., Los Angeles (USA). Inst. of Geophysics and Planetary Physics
Citation Formats
Sweeney, R E, and Kaplan, I R.
Natural abundances of /sup 15/N as a source indicator for near-shore marine sedimentary and dissolved nitrogen.
Netherlands: N. p.,
1980.
Web.
Sweeney, R E, & Kaplan, I R.
Natural abundances of /sup 15/N as a source indicator for near-shore marine sedimentary and dissolved nitrogen.
Netherlands.
Sweeney, R E, and Kaplan, I R.
1980.
"Natural abundances of /sup 15/N as a source indicator for near-shore marine sedimentary and dissolved nitrogen."
Netherlands.
@misc{etde_6820265,
title = {Natural abundances of /sup 15/N as a source indicator for near-shore marine sedimentary and dissolved nitrogen}
author = {Sweeney, R E, and Kaplan, I R}
abstractNote = {The nitrogen isotope ratios of 42 sediment samples of total nitrogen and 38 dissolved pore-water ammonium samples from Santa Barbara Basin sediment cores were measured. The range of delta/sup 15/N values for total nitrogen was +2.89 to +9.4 per thousand with a mean of +6.8 per thousand and for pore water ammonium, +8.2 to +12.4 per thousand with a mean of 10.2 per thousand. The results suggest that the dissolved ammonium in the pore water is produced from bacterial degradation of marine organic matter. The range of delta /sup 15/N values for total nitrogen in the sediment is interpreted as resulting from an admixture of nitrogen derived from marine (+10 per thousand) and terrestrial (+2 per thousand) cores. The marine component of this mixture, composed principally of calcium carbonate with smaller amounts of opal and organic matter, contains approximately 1.0% nitrogen. The terrestrial component, which comprises over 80% of the sediment, contains approximately 0.1% organically bound nitrogen and accounts for > 25% of the total nitrogen in Santa Barbara Basin sediment.}
journal = []
volume = {9:2}
journal type = {AC}
place = {Netherlands}
year = {1980}
month = {Apr}
}
title = {Natural abundances of /sup 15/N as a source indicator for near-shore marine sedimentary and dissolved nitrogen}
author = {Sweeney, R E, and Kaplan, I R}
abstractNote = {The nitrogen isotope ratios of 42 sediment samples of total nitrogen and 38 dissolved pore-water ammonium samples from Santa Barbara Basin sediment cores were measured. The range of delta/sup 15/N values for total nitrogen was +2.89 to +9.4 per thousand with a mean of +6.8 per thousand and for pore water ammonium, +8.2 to +12.4 per thousand with a mean of 10.2 per thousand. The results suggest that the dissolved ammonium in the pore water is produced from bacterial degradation of marine organic matter. The range of delta /sup 15/N values for total nitrogen in the sediment is interpreted as resulting from an admixture of nitrogen derived from marine (+10 per thousand) and terrestrial (+2 per thousand) cores. The marine component of this mixture, composed principally of calcium carbonate with smaller amounts of opal and organic matter, contains approximately 1.0% nitrogen. The terrestrial component, which comprises over 80% of the sediment, contains approximately 0.1% organically bound nitrogen and accounts for > 25% of the total nitrogen in Santa Barbara Basin sediment.}
journal = []
volume = {9:2}
journal type = {AC}
place = {Netherlands}
year = {1980}
month = {Apr}
}