Table 1.
Characteristics of the basalt samples used in this study, including date of collection, cruise and dive number of collection, water depth of sample, depth below seafloor, latitude, longitude, and weight percent organic carbon (OC; listed as average ± 1 standard deviation; n = 3–12).
| Sample ID | Date | Cruise/dive | Water depth [m] | Depth [mbsf] | Lat. | Lon. | OC [%] |
|---|---|---|---|---|---|---|---|
| JdF 2009 | 2009-08-22 | AT15-51/AD4527 | 1545 | 0 | 45.934 | -130.014 | 0.030 ± 0.007 |
| Ula Nui | 2009-10-07 | KM09-23/J2-477 | 4987 | 0 | 18.707 | -155.184 | 0.058 ± 0.022 |
| Marker 2 | 2009-10-12 | KM09-23/J2-481 | 1178 | 0 | 18.909 | -155.257 | 0.058 ± 0.024 |
| U1382A 3R4 | 2011-10-06 | IODP X336/NA | 4483 | 118 | 22.589 | -46.082 | 0.045 ± 0.024 |
| U1382A 7R2 | 2011-10-06 | IODP X336/NA | 4483 | 154 | 22.589 | -46.082 | 0.023 ± 0.017 |
| U1383C 13R1 | 2011-10-25 | IODP X336/NA | 4414 | 173 | 22.802 | -46.053 | 0.018 ± 0.001 |
| U1383C glass | 2011-10-25 | IODP X336/NA | 4414 | ∼220 | 22.802 | -46.053 | 0.025 ± 0.016 |
| J2-626-R1 | 2012-04-23 | MSM20-5/J2-626 | 3949 | 0 | 22.469 | -46.036 | 0.053 ± 0.036 |
| J2-627-R3 | 2012-04-24 | MSM20-5/J2-627 | 3875 | 0 | 22.751 | -46.056 | 0.024 ± 0.006 |
AD, HOV Alvin dive; AT, R/V Atlantis; J2, ROV Jason II dive; KM, R/V Kilo Moana; IODP, Integrated Ocean Drilling Program; mbsf, meters below seafloor; MSM, R/V Maria S. Merian; NA, not applicable.