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Stancin, Andrea M; Gleason, James D; Hovan, Steven A; Rea, David K; Owen, Robert M; Moore, Theodore C; Hall, Chris M; Blum, Joel D (2008): Miocene to recent dust record from the Southwest Pacific Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.706167, Supplement to: Stancin, AM et al. (2008): Miocene to recent eolian dust record from the Southwest Pacific Ocean at 40° S latitude. Palaeogeography, Palaeoclimatology, Palaeoecology, 261(3-4), 218-233, https://doi.org/10.1016/j.palaeo.2007.12.015

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Abstract:
A 14-meter long pelagic clay core recovered at Marlin Rise (40°00.531'S, 154°2.601'W; 4775 m water depth) in the Southwest Pacific Basin contains a record of eolian dust deposited since the early Miocene. Downcore analysis of detrital minerals reveals a dominantly eolian signature with relatively constant proportions of quartz, feldspar and illite and trace amounts of chlorite, kaolinite and smectite, consistent with a continental (loess-like) source region. Fish tooth Sr isotope stratigraphy reveals the base of the core to be 17.5 Ma, with low sedimentation rates (<0.5 mm/kyr LSR) indicated for the interval 17.5 to 10 Ma; several hiatuses in deposition appear to be present upcore, but are beyond the age resolution of the fish teeth stratigraphy. These intervals are revealed as apparent discontinuities in the Sr isotope record, accompanied by pulses of anomalously rapid sedimentation at ~10 Ma, 6.7 Ma and 4.1 Ma. Bulk mass accumulation rates (MAR) are calculated at ~10 mg/cm2/kyr over the last 4 Myr, consistent with previously estimated Quaternary eolian flux rates to this part of the Pacific. Nd, Pb and Sr radiogenic isotopic compositions of the detrital mineral extract (<38 µm) show no trends with age, while 40Ar/39Ar ages show an upcore younging trend (~180 Ma to ~150 Ma), in concert with a slight coarsening of eolian grain-size distributions. These ages likely reflect mixing of Mesozoic illite-dominated clay from at least two continental source areas: southeastern Australia (Murray-Darling Basin/Lake Eyre Basin) and New Zealand (South Island). The data indicate remarkable constancy of continental eolian sources exposed to weathering and dispersal at this latitude during the Neogene.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -36.508158 * Median Longitude: -149.148925 * South-bound Latitude: -40.008850 * West-bound Longitude: -154.043350 * North-bound Latitude: -19.004700 * East-bound Longitude: -124.676800
Date/Time Start: 1983-03-17T00:00:00 * Date/Time End: 1983-03-17T00:00:00
Event(s):
92-598 * Latitude: -19.004700 * Longitude: -124.676800 * Date/Time: 1983-03-17T00:00:00 * Elevation: -3699.0 m * Penetration: 52.4 m * Recovery: 41.2 m * Location: South Pacific * Campaign: Leg92 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 52.4 m cored; 0 m drilled; 78.7 % recovery
MV0502-01JC * Latitude: -40.008850 * Longitude: -154.043350 * Elevation: -4775.0 m * Location: Southwest Pacific * Campaign: TUIM-03 * Basis: Melville * Method/Device: Piston corer (PC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Table 3) Sr-Nd-Pb isotopic composition of the terrigenous extract of DSDP Hole 92-598. https://doi.org/10.1594/PANGAEA.706165
  2. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Table 4) 40Ar/39Ar ages and replicate runs for eolian extract from sediment core MV0502-01JC. https://doi.org/10.1594/PANGAEA.706166
  3. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Appendix) Age model of sediment core MV0502-01JC. https://doi.org/10.1594/PANGAEA.706159
  4. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Table 3) Sr-Nd-Pb isotopic composition of the terrigenous extract of sediment core MV0502-01JC. https://doi.org/10.1594/PANGAEA.706164
  5. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Table 1) Strontium isotope ichthyolith stratigraphy of sediment core MV0502-01JC. https://doi.org/10.1594/PANGAEA.706161
  6. Stancin, AM; Gleason, JD; Hovan, SA et al. (2008): (Table 2) XRD intensity and peak area for detrital extract of sediment core MV0502-01JC. https://doi.org/10.1594/PANGAEA.706162