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Ghose, Indraneel; Cannat, Mathilde; Seyler, Monique (1996): Average compositions and analyses range for clinopyroxene, olivines, orthopyroxene, and spinel from the MARK area at DSDP Site 45-395A, and ODP Site 153-920 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.721826, Supplement to: Ghose, I et al. (1996): Transform fault effect on mantle melting in the MARK area (Mid-Atlantic Ridge south of the Kane transform). Geology, 24(12), 1139-1142, https://doi.org/10.1130/0091-7613(1996)024%3C1139:TFEOMM%3E2.3.CO;2

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Abstract:
Mineral compositions of residual peridotites collected at various locations in the Mid-Atlantic Ridge south of the Kane transform (MARK area) are consistent with generally smaller degrees of melting in the mantle near the large offset Kane transform than near the other, small offset, axial discontinuities in the area. We propose that this transform fault effect is due to along-axis variations in the final depth of melting in the subaxial mantle, reflecting the colder thermal regime of the ridge near the Kane transform. Calculations made with a passive mantle flow regime suggest that these along-axis variations in the final depth of melting would not produce the full range of crustal thickness variations observed in the MARK area seismic record. It is therefore likely that the transform fault effect in the MARK area is combined with other mechanisms capable of producing crustal thickness variations, such as along-axis melt migration, the trapping of part of the magma in a cold mantle root beneath the ridge, or active mantle upwelling.
Other version:
Average compositions and analyses range for spinel and reconstructed modal analyses of serpentinized peridotites from the MARK area
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 23.179655 * Median Longitude: -45.307627 * South-bound Latitude: 22.755800 * West-bound Longitude: -46.081700 * North-bound Latitude: 23.338700 * East-bound Longitude: -45.017300
Date/Time Start: 1975-12-09T00:00:00 * Date/Time End: 1993-12-21T02:00:00
Event(s):
45-395A * Latitude: 22.755800 * Longitude: -46.081700 * Date/Time: 1975-12-09T00:00:00 * Elevation: -4484.0 m * Penetration: 664.1 m * Recovery: 112 m * Campaign: Leg45 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 68 cores; 624.1 m cored; 9.4 m drilled; 17.9 % recovery
153-920B * Latitude: 23.338500 * Longitude: -45.017300 * Date/Time Start: 1993-12-05T06:15:00 * Date/Time End: 1993-12-09T21:13:00 * Elevation: -3339.0 m * Penetration: 126.4 m * Recovery: 44.57 m * Location: South Atlantic Ocean * Campaign: Leg153 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 112.4 m cored; 0 m drilled; 39.7 % recovery
153-920D * Latitude: 23.338700 * Longitude: -45.017400 * Date/Time Start: 1993-12-13T15:10:00 * Date/Time End: 1993-12-21T02:00:00 * Elevation: -3338.0 m * Penetration: 200.8 m * Recovery: 95.08 m * Location: South Atlantic Ocean * Campaign: Leg153 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 200.8 m cored; 0 m drilled; 47.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
11 datasets

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Datasets listed in this publication series

  1. Ghose, I; Cannat, M; Seyler, M (1996): (Table clino) Average compositions and analyses range for clinopyroxene from the MARK area at DSDP Site 45-395A. https://doi.org/10.1594/PANGAEA.721815
  2. Ghose, I; Cannat, M; Seyler, M (1996): (Table clino) Average compositions and analyses range for clinopyroxene from the MARK area at ODP Site 153-920B. https://doi.org/10.1594/PANGAEA.721813
  3. Ghose, I; Cannat, M; Seyler, M (1996): (Table clino) Average compositions and analyses range for clinopyroxene from the MARK area at ODP Site 153-920D. https://doi.org/10.1594/PANGAEA.721814
  4. Ghose, I; Cannat, M; Seyler, M (1996): (Table olivin) Average compositions and analyses range for olivines from the MARK area at DSDP Site 45-395A. https://doi.org/10.1594/PANGAEA.721818
  5. Ghose, I; Cannat, M; Seyler, M (1996): (Table olivin) Average compositions and analyses range for olivines from the MARK area at ODP Site 153-920B. https://doi.org/10.1594/PANGAEA.721816
  6. Ghose, I; Cannat, M; Seyler, M (1996): (Table olivin) Average compositions and analyses range for olivines from the MARK area at ODP Site 153-920D. https://doi.org/10.1594/PANGAEA.721817
  7. Ghose, I; Cannat, M; Seyler, M (1996): (Table ortho) Average compositions and analyses range for orthopyroxene from the MARK area at DSDP Site 45-395A. https://doi.org/10.1594/PANGAEA.721821
  8. Ghose, I; Cannat, M; Seyler, M (1996): (Table ortho) Average compositions and analyses range for orthopyroxene from the MARK area at ODP Site 153-920B. https://doi.org/10.1594/PANGAEA.721819
  9. Ghose, I; Cannat, M; Seyler, M (1996): (Table ortho) Average compositions and analyses range for orthopyroxene from the MARK area at ODP Site 153-920D. https://doi.org/10.1594/PANGAEA.721820
  10. Ghose, I; Cannat, M; Seyler, M (1996): (Table spinel) Average compositions and analyses range for spinel from the MARK area at ODP Site 153-920B. https://doi.org/10.1594/PANGAEA.721822
  11. Ghose, I; Cannat, M; Seyler, M (1996): (Table spinel) Average compositions and analyses range for spinel from the MARK area at ODP Site 153-920D. https://doi.org/10.1594/PANGAEA.721823