Skip to Main Content
Table 3

Isotopic results for particle collection periods used for 3-endmember mixing model assessment, with model results assigning the source components to be marine primary production (marine), riverine-terrestrial inputs (riverine) and fossil carbon (oil). DOI: https://doi.org/10.1525/elementa.298.t3

Site, conditionIsotope valuesModel results assigning sourcea

Δ14C‰δ13C‰δ34S‰MarineRiverineOilSumb

 
DWH site, depleted values 8 Dec 2010 –141.0 –22.1 9.1 0.51 ± 0.07 0.34 ± 0.15 0.11 ± 0.03 0.96 
DWH site, after July 2013 –3.2 ± 31.0 –21.9 ± 0.5 16.9 ± 2.0 0.85 ± 0.09 0.14 ± 0.07 0.01 ± 0.01 0.99 
Reference site, average 3.8 ± 31.1 –21.9 ± 0.9 16.2 ± 3.1 0.81 ± 0.08 0.20 ± 0.08 0.00 ± 0.03 1.01 
Seep site, non-trough –21.7 ± 45.7 –22.3 ± 0.5 18.4 ± 2.1 0.95 ± 0.05 0.03 ± 0.05 0.05 ± 0.03 1.03 
Seep site, trough –109.0 ± 29.1 –23.0 ± 0.2 16.6 ± 2.3 0.90 ± 0.05 0.0 ± 0.06 0.14 ± 0.03 1.04 
Site, conditionIsotope valuesModel results assigning sourcea

Δ14C‰δ13C‰δ34S‰MarineRiverineOilSumb

 
DWH site, depleted values 8 Dec 2010 –141.0 –22.1 9.1 0.51 ± 0.07 0.34 ± 0.15 0.11 ± 0.03 0.96 
DWH site, after July 2013 –3.2 ± 31.0 –21.9 ± 0.5 16.9 ± 2.0 0.85 ± 0.09 0.14 ± 0.07 0.01 ± 0.01 0.99 
Reference site, average 3.8 ± 31.1 –21.9 ± 0.9 16.2 ± 3.1 0.81 ± 0.08 0.20 ± 0.08 0.00 ± 0.03 1.01 
Seep site, non-trough –21.7 ± 45.7 –22.3 ± 0.5 18.4 ± 2.1 0.95 ± 0.05 0.03 ± 0.05 0.05 ± 0.03 1.03 
Seep site, trough –109.0 ± 29.1 –23.0 ± 0.2 16.6 ± 2.3 0.90 ± 0.05 0.0 ± 0.06 0.14 ± 0.03 1.04 

a The isotopic composition of these source terms is given in Table 2.

b The sum of the different predicted source fractions, which should equal 1, is within 4% of 1.0 or better.

Close Modal

or Create an Account

Close Modal
Close Modal