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Bohaty, Steven M; Wise, Sherwood W; Duncan, Robert A; Moore, Leah; Wallace, Paul J (2003): Diatom biostratigraphy, Argon ages and chronology of ODP Hole 183-1138A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.785348, Supplement to: Bohaty, SM et al. (2003): Neogene diatom biostratigraphy, tephra stratigraphy, and chronology of ODP Hole 1138A, Kerguelen Plateau. In: Frey, FA; Coffin, MF; Wallace, PJ; Quilty, PG (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 183, 1-53, https://doi.org/10.2973/odp.proc.sr.183.016.2003

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Abstract:
A thick Neogene section was recovered in the upper ~300 m of Ocean Drilling Program Hole 1138A, drilled on the Central Kerguelen Plateau in the Indian sector of the Southern Ocean. Sediment lithologies consist primarily of mixed carbonate and biosiliceous clays and oozes, with several thin (1-3 cm) tephra horizons. The tephras are glass rich, well sorted, and dominantly trachytic to rhyolitic in composition. Volcaniclastic material in these horizons is interpreted to have originated from Heard Island, 180 km northwest of Site 1138, and was likely emplaced through both primary ash fall and turbiditic, submarine flows.
A Neogene age-depth model for Hole 1138A is constructed primarily from 36 diatom biostratigraphic datums. Nannofossil and planktonic foraminifer biostratigraphy provides supporting age information. Additionally, four high-precision 40Ar-39Ar ages are derived from ash and tephra horizons, and these radiometric ages are in close agreement with the biostratigraphic ages. The integrated age-depth model reveals a reasonably complete lower Miocene to upper Pleistocene section in Hole 1138A, with the exception of a ~1-m.y. hiatus at the Miocene/Pliocene boundary. Another possible hiatus is also identified at the Oligocene/Miocene boundary. High Neogene sedimentation rates and the presence of both calcareous and siliceous microfossils, combined with datable tephra horizons, establish Site 1138 as a suitable target for future drilling legs with paleoceanographic objectives. This report also proposes two new diatom species, Fragilariopsis heardensis and Azpeitia harwoodii, from Pliocene strata of Hole 1138A.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -53.551750 * Longitude: 75.974880
Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00
Event(s):
183-1138A * Latitude: -53.551750 * Longitude: 75.974880 * Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00 * Elevation: -1141.4 m * Penetration: 842.7 m * Recovery: 411.98 m * Location: Indian Ocean * Campaign: Leg183 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 89 cores; 842.7 m cored; 0 m drilled; 48.9 % recovery
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. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T4) Argon 40 - Argon 39 incremental heating ages from Neogene ash layers in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785345
  2. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T1) Neogene stratigraphy of diatoms, ebridians and endoskeletal dinoflagellates in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785342
  3. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T2) Miocene diatom zones and datums in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785343
  4. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T5) Neogene biostratigraphy datums and ages in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785346
  5. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T6) Pliocene-Pleistocene paleomagnetic stratigraphy and ages in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785347
  6. Bohaty, SM; Wise, SW; Duncan, RA et al. (2003): (Table T3) Pliocene-Pleistocene diatom zones and datums in ODP Hole 183-1138A. https://doi.org/10.1594/PANGAEA.785344