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Robinson, Simon G (1990): Lithologic correlation of ODP Leg 115 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.758272, Supplement to: Robinson, SG (1990): Applications for whole-core magnetic susceptibility measurements of deep-sea sediments: Leg 115 results. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 737-771, https://doi.org/10.2973/odp.proc.sr.115.198.1990

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Abstract:
Whole-core (WC) measurements of low-field magnetic susceptibility (MS) provide an extremely simple, rapid, and nondestructive technique for high-resolution core logging and lithostratigraphic correlation between subsidiary holes at Ocean Drilling Program (ODP) sites. This is particularly useful for reconstructing composite, stratigraphically continuous sequences for individual ODP sites by splicing the uninterrupted records obtained from subsections of offset cores recovered from adjacent holes. Correlation between the WCMS profiles of holes drilled at different sites is also possible in some instances, especially when lithologic variations at each site are controlled by regional paleoceanographic or global (i.e., orbitally forced) paleoclimatic changes. In such circumstances, WCMS may also be used as a proxy paleoclimatic indicator, duly assisting climatostratigraphic zonation of the recovered sequence by more conventional microfossil and isotopic techniques.
High-resolution WCMS profiles are also useful in detecting intervals of the recovered sequence affected by drilling disturbance, in the form of contamination by pipe rust or similar metallic artifacts as well as discontinuities related to repenetration of the corer or loss of material between successively cored intervals.
Stratigraphic intervals that have been affected by early (suboxic) diagenesis resulting from a high initial organic matter content of the sediment are also readily identified by WCMS logging. The MS signal of horizons affected by suboxic diagensis is typically degraded in proportion to the duration and intensity (related to initial Corg concentration) of organic matter remineralization. The lowering of MS values during suboxic diagenesis results from "dissolution" (bacterially mediated ionic dissociation) of magnetic iron and manganese oxides and oxyhydroxides in the sediment.
It is to be hoped that, on future ODP (or similar) cruises, WCMS logging will cease to be regarded as a mere adjunct to paleomagnetic measurements, but rather as a simple, yet powerful, lithostratigraphic tool, directly analogous to downhole geophysical logging tools, and complimentary to shipboard techniques for whole-core measurements of physical properties (e.g., P-wave logging, GRAPE, etc.).
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -6.020850 * Median Longitude: 61.016425 * South-bound Latitude: -13.114000 * West-bound Longitude: 60.551700 * North-bound Latitude: -2.742700 * East-bound Longitude: 61.371000
Date/Time Start: 1987-05-22T23:15:00 * Date/Time End: 1987-06-12T15:30:00
Event(s):
115-706A * Latitude: -13.114000 * Longitude: 61.371000 * Date/Time Start: 1987-05-22T23:15:00 * Date/Time End: 1987-05-23T08:00:00 * Elevation: -2517.0 m * Penetration: 47.5 m * Recovery: 39.28 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 47.5 m cored; 0 m drilled; 82.7 % recovery
115-709A * Latitude: -3.915000 * Longitude: 60.551700 * Date/Time Start: 1987-06-05T01:30:00 * Date/Time End: 1987-06-06T06:30:00 * Elevation: -3047.0 m * Penetration: 203.1 m * Recovery: 184.74 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 core; 203.1 m cored; 0 m drilled; 91 % recovery
115-710A * Latitude: -4.311700 * Longitude: 60.980000 * Date/Time Start: 1987-06-08T20:45:00 * Date/Time End: 1987-06-10T00:00:00 * Elevation: -3823.0 m * Penetration: 209.7 m * Recovery: 185.2 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 209.7 m cored; 0 m drilled; 88.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Robinson, SG (1990): (Table 5) Lithostratigraphic correlation between ODP Hole 115-706A and 115-706B. https://doi.org/10.1594/PANGAEA.758269
  2. Robinson, SG (1990): (Table 2) Lithostratigraphic correlation between ODP Hole 115-709A and 115-709C. https://doi.org/10.1594/PANGAEA.758267
  3. Robinson, SG (1990): (Table 6) Lithostratigraphic correlation between ODP Hole 115-710A and 115-706B. https://doi.org/10.1594/PANGAEA.758271
  4. Robinson, SG (1990): (Table 3) Lithostratigraphic correlation between ODP Hole 115-711A and 115-711B. https://doi.org/10.1594/PANGAEA.758268