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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1997
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.701230 |
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| _version_ | 1867168071802683392 |
|---|---|
| author | Morad, S Al-Aasm, Ihsan S |
| author_facet | Morad, S Al-Aasm, Ihsan S |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_701230 |
| institution | PANGAEA |
| language | en |
| publishDate | 1997 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Carbon, oxygen and strontium isotopic composition of the rhodochrosite nodules from DSDP Sites 503A and 503B Morad, S Al-Aasm, Ihsan S 68-503; Age, dated; Age, paleomagnetic; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg68; Mass spectrometer Finnigan MAT 261; Mass spectrometer VG SIRA 12; North Pacific/FLANK; Sample code/label; Sample type; Strontium-87/Strontium-86 ratio; δ13C; δ18O 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. |
| title | (Table 1) Carbon, oxygen and strontium isotopic composition of the rhodochrosite nodules from DSDP Sites 503A and 503B |
| topic | 68-503; Age, dated; Age, paleomagnetic; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg68; Mass spectrometer Finnigan MAT 261; Mass spectrometer VG SIRA 12; North Pacific/FLANK; Sample code/label; Sample type; Strontium-87/Strontium-86 ratio; δ13C; δ18O |
| url | https://doi.org/10.1594/PANGAEA.701230 |