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
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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