Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Bach, Wolfgang; Rosner, Martin; Jöns, Niels; Rausch, Svenja; Robinson, Laura F; Paulick, Holger; Erzinger, Jörg (2011): Chemical and isotopic composition of carbonate veins from ODP Leg 209 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.782718, Supplement to: Bach, W et al. (2011): Carbonate veins trace seawater circulation during exhumation and uplift of mantle rocks: Results from ODP Leg 209. Earth and Planetary Science Letters, 311(3-4), 242-252, https://doi.org/10.1016/j.epsl.2011.09.021

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Carbonate veins hosted in ultramafic basement drilled at two sites in the Mid Atlantic Ridge 15°N area record two different stages of fluid-basement interaction. A first generation of carbonate veins consists of calcite and dolomite that formed syn- to postkinematically in tremolite-chlorite schists and serpentine schists that represent gently dipping large-offset faults. These veins formed at temperatures between 90 and 170 °C (oxygen isotope thermometry) and from fluids that show intense exchange of Sr and Li with the basement (87Sr/86Sr = 0.70387 to 0.70641, d7Li L-SVEC = + 3.3 to + 8.6 per mil). Carbon isotopic compositions range to high d13C PDB values (+ 8.7 per mil), indicating that methanogenesis took place at depth. The Sr-Li-C isotopic composition suggests temperatures of fluid-rock interaction that are much higher (T > 350-400 °C) than the temperatures of vein mineral precipitation inferred from oxygen isotopes. A possible explanation for this discrepancy is that fluids cooled conductively during upflow within the presumed detachment fault.
Aragonite veins were formed during the last 130 kyrs at low-temperatures within the uplifted serpentinized peridotites. Chemical and isotopic data suggest that the aragonites precipitated from cold seawater, which underwent overall little exchange with the basement. Oxygen isotope compositions indicate an increase in formation temperature of the veins by 8-12 °C within the uppermost ~ 80 m of the subseafloor. This increase corresponds to a high regional geothermal gradient of 100-150 °C/km, characteristic of young lithosphere undergoing rapid uplift.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 15.328643 * Median Longitude: -45.773974 * South-bound Latitude: 15.036480 * West-bound Longitude: -46.676360 * North-bound Latitude: 15.647780 * East-bound Longitude: -44.948110
Date/Time Start: 2003-06-02T16:45:00 * Date/Time End: 2003-06-18T21:45:00
Event(s):
209-1271A * Latitude: 15.037030 * Longitude: -44.948110 * Date/Time Start: 2003-06-02T16:45:00 * Date/Time End: 2003-06-04T02:45:00 * Elevation: -3611.9 m * Penetration: 44.8 m * Recovery: 5.76 m * Location: South Atlantic Ocean * Campaign: Leg209 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 44.8 m cored; 0 m drilled; 12.9 % recovery
209-1271B * Latitude: 15.036480 * Longitude: -44.948530 * Date/Time Start: 2003-06-04T02:45:00 * Date/Time End: 2003-06-07T07:45:00 * Elevation: -3584.9 m * Penetration: 103.8 m * Recovery: 15.9 m * Location: South Atlantic Ocean * Campaign: Leg209 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 103.8 m cored; 0 m drilled; 15.3 % recovery
209-1274A * Latitude: 15.647780 * Longitude: -46.676360 * Date/Time Start: 2003-06-15T00:30:00 * Date/Time End: 2003-06-18T21:45:00 * Elevation: -3939.8 m * Penetration: 155.8 m * Recovery: 34.65 m * Location: South Atlantic Ocean * Campaign: Leg209 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 155.8 m cored; 0 m drilled; 22.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Bach, W; Rosner, M; Jöns, N et al. (2011): (Table 2) Results of U-Th disequilibrium studies. https://doi.org/10.1594/PANGAEA.782712
  2. Bach, W; Rosner, M; Jöns, N et al. (2011): (Table 3) Trace element compositions of carbonate veins. https://doi.org/10.1594/PANGAEA.782717
  3. Bach, W; Rosner, M; Jöns, N et al. (2011): (Table 1) Isotopic compositions and radiocarbon ages of carbonate veins. https://doi.org/10.1594/PANGAEA.782709