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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1983
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| Online Access: | https://doi.org/10.1594/PANGAEA.809833 |
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| _version_ | 1867168141394575360 |
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| author | Jenden, Peter D Gieskes, Joris M |
| author_facet | Jenden, Peter D Gieskes, Joris M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Low salinities and strong opposing fluctuations between chlorinity and interstitial water d18O and dD characterize the region of gas-hydrate occurrence at Site 533. In addition to the hydrate recovered from 243 m sub-bottom, thin, diffuse layers of hydrate composing about 10% of the total pore space may have been cored around 290 m. Decomposition during recovery could account for the high oxygen isotope value (+2.80 per mil) and low chlorinity (17.21 g/kg) observed at this depth. High alkalinity and dissolved ammonia (71 meq/l and 33 mM, respectively) indicate substantial microbial activity. Chlorinity gradually increases with depth in the 1600-m-thick sediment column at Site 534, perhaps due to deepseated alteration-hydration reactions or to the presence of nearby evaporites. d18O and dD decrease with depth and are well correlated, suggesting that a common mechanism is fractionating both. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_809833 |
| institution | PANGAEA |
| language | en |
| publishDate | 1983 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Interstitial water chemistry at DSDP Leg 76 Holes Jenden, Peter D Gieskes, Joris M 76-533; 76-533A; 76-534A; Alkalinity, total; Ammonium; Calcium; Chlorine; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Latitude of event; Leg76; Lithium; Longitude of event; Magnesium; Mass spectrometry (MS); North Atlantic/BASIN; North Atlantic/RIDGE; pH; Potassium; Salinity; Sample code/label; see reference(s); Silicon; Strontium; Sulfate; δ18O, water; δ Deuterium Low salinities and strong opposing fluctuations between chlorinity and interstitial water d18O and dD characterize the region of gas-hydrate occurrence at Site 533. In addition to the hydrate recovered from 243 m sub-bottom, thin, diffuse layers of hydrate composing about 10% of the total pore space may have been cored around 290 m. Decomposition during recovery could account for the high oxygen isotope value (+2.80 per mil) and low chlorinity (17.21 g/kg) observed at this depth. High alkalinity and dissolved ammonia (71 meq/l and 33 mM, respectively) indicate substantial microbial activity. Chlorinity gradually increases with depth in the 1600-m-thick sediment column at Site 534, perhaps due to deepseated alteration-hydration reactions or to the presence of nearby evaporites. d18O and dD decrease with depth and are well correlated, suggesting that a common mechanism is fractionating both. |
| title | (Table 1) Interstitial water chemistry at DSDP Leg 76 Holes |
| topic | 76-533; 76-533A; 76-534A; Alkalinity, total; Ammonium; Calcium; Chlorine; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Latitude of event; Leg76; Lithium; Longitude of event; Magnesium; Mass spectrometry (MS); North Atlantic/BASIN; North Atlantic/RIDGE; pH; Potassium; Salinity; Sample code/label; see reference(s); Silicon; Strontium; Sulfate; δ18O, water; δ Deuterium |
| url | https://doi.org/10.1594/PANGAEA.809833 |