von Breymann, Marta T; Berner, Ulrich (1991): Isotope characterization and estimated temperature of formation of calcite veins in ODP Sites 124-768 and 124-770 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.762057, Supplement to: von Breymann, MT; Berner, U (1991): Isotopic characterization of secondary carbonates from Sulu and Celebes Sea Basalts: contrasting scenarios of basalt-seawater interaction. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 233-237, https://doi.org/10.2973/odp.proc.sr.124.174.1991
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Secondary carbonate minerals were recovered within the basalts at both ODP Sites 768 and 770 in the Sulu and Celebes seas. Petrographic and X-ray diffraction analyses indicate that the carbonates are calcites. Other alteration products recognized in the thin sections are smectites, iron oxides, and gypsum. The 13C values of carbonates from both sites range from 1.6 per mil to 2.3 per mil, which are indicative of inorganic carbonate formation with no contributions from 13C-depleted sources such as oxidized organic carbon or methane. The oxygen isotopes at Site 770 range from 30.8 per mil to 31.6 per mil, which indicates a pervasive circulation of cold seawater (9° to 12°C) during alteration of the Celebes
Sea basalts. In contrast, carbonates associated with Site 768 basalts have less positive d18O values (21.0 per mil to 27.3 per mil). A lighter 18O isotopic signature indicates the formation of secondary calcite at either higher temperatures or in a system closed to seawater. The rapidly deposited pyroclastic flows at Site 768 would have limited water access to the crust very soon after its formation, which leads us to speculate that the carbonates in the Sulu Sea basalts were formed by isotopically modified fluids resulting from basalt alteration in a closed system.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 6.572400 * Median Longitude: 122.444100 * South-bound Latitude: 5.144800 * West-bound Longitude: 121.219800 * North-bound Latitude: 8.000000 * East-bound Longitude: 123.668400
Date/Time Start: 1988-12-01T14:30:00 * Date/Time End: 1988-12-30T18:00:00
Minimum DEPTH, sediment/rock: 458.7 m * Maximum DEPTH, sediment/rock: 1259.8 m
Event(s):
124-768C * Latitude: 8.000000 * Longitude: 121.219800 * Date/Time Start: 1988-12-01T14:30:00 * Date/Time End: 1988-12-13T07:00:00 * Elevation: -4396.0 m * Penetration: 1268.5 m * Recovery: 525.69 m * Location: Sulu Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 100 cores; 915 m cored; 0 m drilled; 57.5 % recovery
124-770C * Latitude: 5.144800 * Longitude: 123.668400 * Date/Time Start: 1988-12-24T08:00:00 * Date/Time End: 1988-12-30T18:00:00 * Elevation: -4516.0 m * Penetration: 529.5 m * Recovery: 54.81 m * Location: Mindanao Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 115.8 m cored; 0 m drilled; 47.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | von Breymann, Marta T | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 4 | Color description | Color desc | von Breymann, Marta T | |||
| 5 | δ13C, calcite | δ13C cal | ‰ PDB | von Breymann, Marta T | Mass spectrometer Finnigan MAT 250 | |
| 6 | δ18O, calcite | δ18O cal | ‰ PDB | von Breymann, Marta T | Mass spectrometer Finnigan MAT 250 | |
| 7 | δ18O, calcite | δ18O cal | ‰ SMOW | von Breymann, Marta T | Mass spectrometer Finnigan MAT 250 | |
| 8 | Temperature, calculated | T cal | °C | von Breymann, Marta T | Calculated | 0 per mil |
| 9 | Temperature, calculated | T cal | °C | von Breymann, Marta T | Calculated | -1 per mil |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
154 data points