Morad, S; Al-Aasm, Ihsan S (1997): (Table 1) Carbon, oxygen and strontium isotopic composition of the rhodochrosite nodules from DSDP Sites 503A and 503B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.701230, Supplement to: Morad, S; Al-Aasm, IS (1997): Conditions of rhodochrosite-nodule formation in Neogene-Pleistocene deep-sea sediments: evidence from O, C and Sr isotopes. Sedimentary Geology, 114(1-4), 295-304, https://doi.org/10.1016/S0037-0738(97)00066-3
Always quote citation above when using data! You can download the citation in several formats below.
Published: 1997 (exact date unknown) • DOI registered: 2008-08-07
Abstract:
Calcic rhodochrosite occurs as nodules around burrows in late Neogene-early Pleistocene pelagic sediments of the Galapagos Ridge in the Guatemala Basin, eastern equatorial Pacific (DSDP Leg 68; Site 503). Growth was accomplished in the suboxic zone (d13C = -4.3 per mil to -1.3 per mil) at an estimated depth between ~30 and 70 cm beneath the seafloor. The rhodochrosites have 87Sr/86Sr ratios (0.708945–0.709073) that largely record the small-scale changes in seawater Sr-isotopic composition. The anomalous enrichment of the rhodochrosite in 18O isotopes (d18OPDB up to +6.4 per mil is attributed to the dissociation of gas hydrates.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 4.050700 * Longitude: -95.636800
Date/Time Start: 1979-09-06T00:00:00 * Date/Time End: 1979-09-06T00:00:00
Minimum DEPTH, sediment/rock: 17.6 m * Maximum DEPTH, sediment/rock: 164.6 m
Event(s):
68-503 * Latitude: 4.050700 * Longitude: -95.636800 * Date/Time: 1979-09-06T00:00:00 * Elevation: -3672.0 m * Penetration: 4.4 m * Recovery: 4.8 m * Location: North Pacific/FLANK * Campaign: Leg68 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 cores; 4.4 m cored; 0 m drilled; 109.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Morad, S | DSDP/ODP/IODP sample designation | ||
| 3 | Sample type | Samp type | Morad, S | |||
| 4 | δ13C | δ13C | ‰ PDB | Morad, S | Mass spectrometer VG SIRA 12 | with respect to PDB |
| 5 | δ18O | δ18O | ‰ | Morad, S | Mass spectrometer VG SIRA 12 | with respect to PDB |
| 6 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Morad, S | Mass spectrometer Finnigan MAT 261 | ||
| 7 | Age, dated | Age dated | ka | Morad, S | Age, paleomagnetic |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
158 data points
Data
| 1 Depth sed [m] | 2 Sample label | 3 Samp type | 4 δ13C [‰ PDB] | 5 δ18O [‰] | 6 87Sr/86Sr | 7 Age dated [ka] |
|---|---|---|---|---|---|---|
| 17.6 | 68-503B-05-2,17-20 | core | -3.33 | 3.91 | 0.709111 | 1100 |
| 17.6 | 68-503B-05-2,17-20 | middle | -3.02 | 4.05 | ||
| 17.6 | 68-503B-05-2,17-20 | rim | -3.17 | 5.16 | 0.709123 | |
| 29.8 | 68-503B-08-1,60-66 | bulk | -2.87 | 5.88 | 0.709051 | 1700 |
| 37.8 | 68-503A-10-1,82-88 | bulk | -4.05 | 5.22 | 0.709065 | 1900 |
| 37.8 | 68-503A-10-1,90-92 | bulk | -3.55 | 5.83 | 0.709073 | 1900 |
| 51.4 | 68-503B-13-1,13-20 | bulk | -3.24 | 6.01 | 0.709041 | 2600 |
| 51.9 | 68-503A-13-1,83-87 | bulk | -2.51 | 5.22 | 0.709043 | 2600 |
| 52.2 | 68-503A-13-2,58-60 | bulk | -2.82 | 4.85 | 0.709087 | 2600 |
| 65.1 | 68-503A-15-2,62-66 | bulk | -2.82 | 5.66 | 0.709040 | 3100 |
| 80.4 | 68-503B-19-3,18-22 | core | -3.93 | 3.64 | 0.709011 | 3600 |
| 80.4 | 68-503B-19-3,18-22 | middle | -3.22 | 4.45 | ||
| 80.4 | 68-503B-19-3,18-22 | rim | -3.18 | 5.22 | ||
| 86.5 | 68-503A-21-1,101-109 | core | -3.27 | 5.96 | 0.709025 | 3800 |
| 86.5 | 68-503A-21-1,101-109 | middle | -3.45 | 5.17 | 0.709032 | |
| 86.5 | 68-503A-21-1,101-109 | rim | -3.47 | 5.29 | 0.709028 | 3800 |
| 86.5 | 68-503A-21-1,107-108 | bulk | -3.76 | 4.85 | 0.709036 | |
| 112.1 | 68-503A-27-1,13-22 | core | -2.28 | 1.40 | 0.709040 | 4300 |
| 112.1 | 68-503A-27-1,13-22 | middle | -2.87 | 3.98 | 0.709044 | |
| 112.1 | 68-503A-27-1,13-22 | middle | -2.53 | 5.29 | 0.709051 | |
| 112.1 | 68-503A-27-1,13-22 | rim | -1.34 | 6.70 | 0.709048 | |
| 129.6 | 68-503A-31-1,17-19 | bulk | -2.61 | 5.34 | 0.708961 | 5000 |
| 138.4 | 68-503A-33-1,28-30 | bulk | -3.32 | 4.98 | 0.708992 | 5200 |
| 139.3 | 68-503A-33-1,106-114 | core | -2.80 | 4.46 | 0.708955 | 5400 |
| 139.3 | 68-503A-33-1,106-114 | middle | -1.95 | 6.43 | ||
| 139.3 | 68-503A-33-1,106-114 | rim | -3.27 | 3.65 | ||
| 139.5 | 68-503A-33-1,127-130 | bulk | -4.34 | 5.74 | 0.708976 | 5400 |
| 139.6 | 68-503A-33-1,138-140 | bulk | -3.96 | 4.67 | 0.708988 | 5400 |
| 164.6 | 68-503A-39-1,3-5 | bulk | -3.44 | 4.45 | 0.708945 | 5900 |