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Horz, Kersten H; Worthington, Tim J; Winn, Kyaw; Stoffers, Peter (2013): Investigations on seven sediment cores from the New Ireland Basin, east of Papua New Guinea. PANGAEA, https://doi.org/10.1594/PANGAEA.824489, Supplement to: Horz, KH et al. (2004): Late Quaternary tephra in the New Ireland Basin, Papua New Guinea. Journal of Volcanology and Geothermal Research, 132(1), 73-95, https://doi.org/10.1016/S0377-0273(03)00421-9

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Abstract:
Sediment cores were recovered from the New Ireland Basin, east of Papua New Guinea, in order to investigate the late Quaternary eruptive history of the Tabar-Lihir-Tanga-Feni (TLTF) volcanic chain. Foraminifera d18O profiles were matched to the low-latitude oxygen isotope record to date the cores, which extend back to the early part of d18O Stage 9 (333 ka). Sedimentation rates decrease from >10 cm/1000 yr in cores near New Ireland to ~2 cm/1000 yr further offshore. The cores contain 36 discrete ash beds, mostly 1-8 cm thick and interpreted as either fallout or distal turbidite deposits. Most beds have compositionally homogeneous glass shard populations, indicating that they represent single volcanic events. Shards from all ash beds have the subduction-related pattern of strong enrichment in the large-ion lithophile elements relative to MORB, but three distinct compositional groups are apparent: Group A beds are shoshonitic and characterised by >1300 ppm Sr, high Ce/Yb and high Nb/Yb relative to MORB, Group B beds form a high-K series with MORB-like Nb/Yb but high Ce/Yb and well-developed negative Eu anomalies, whereas Group C beds are transitional between the low-K and medium-K series and characterised by flat chondrite-normalised REE patterns with low Nb/Yb relative to MORB. A comparison with published data from the TLTF chain, the New Britain volcanic arc and backarc including Rabaul, and Bagana on Bougainville demonstrates that only Group A beds share the distinctive phenocryst assemblage and shoshonitic geochemistry of the TLTF lavas. The crystal- and lithic-rich character of the Group A beds point to a nearby source, and their high Sr, Ce/Yb and Nb/Yb match those of Tanga and Feni lavas. A youthful stratocone on the eastern side of Babase Island in the Feni group is the most probable source. Group A beds younger than 20 ka are more fractionated than the older Group A beds, and record the progressive development of a shallow level magma chamber beneath the cone. In contrast, Group B beds represent glass-rich fallout from voluminous eruptions at Rabaul, whereas Group C beds represent distal glass-rich fallout from elsewhere along the volcanic front of the New Britain arc.
Coverage:
Median Latitude: -2.772964 * Median Longitude: 152.421781 * South-bound Latitude: -3.621400 * West-bound Longitude: 151.554200 * North-bound Latitude: -2.119200 * East-bound Longitude: 153.031600
Date/Time Start: 1998-07-20T00:00:00 * Date/Time End: 1998-07-29T00:00:00
Comment:
DEPTH, sediment/rock [m] is bed base [m bsf]
Size:
24 datasets

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Datasets listed in this publication series

  1. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 1) Location of sediment core stations. https://doi.org/10.1594/PANGAEA.824465
  2. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17674-2. https://doi.org/10.1594/PANGAEA.824466
  3. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17675-2. https://doi.org/10.1594/PANGAEA.824467
  4. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17676-2S. https://doi.org/10.1594/PANGAEA.824468
  5. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17677-2. https://doi.org/10.1594/PANGAEA.824469
  6. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17681-2. https://doi.org/10.1594/PANGAEA.824470
  7. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17682-2. https://doi.org/10.1594/PANGAEA.824471
  8. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 2) Age and modal composition of the ash beds of sediment core GIK17684-1. https://doi.org/10.1594/PANGAEA.824472
  9. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 3) Age model of sediment core GIK17675-2. https://doi.org/10.1594/PANGAEA.824473
  10. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 3) Age model of sediment core GIK17676-2S. https://doi.org/10.1594/PANGAEA.824474
  11. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17674-2. https://doi.org/10.1594/PANGAEA.824475
  12. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17675-2. https://doi.org/10.1594/PANGAEA.824476
  13. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17676-2S. https://doi.org/10.1594/PANGAEA.824477
  14. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17677-2. https://doi.org/10.1594/PANGAEA.824478
  15. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17681-2. https://doi.org/10.1594/PANGAEA.824479
  16. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17682-2. https://doi.org/10.1594/PANGAEA.824480
  17. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 4) Major-element analyses of the ash bed of sediment core GIK17684-1. https://doi.org/10.1594/PANGAEA.824481
  18. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17674-2. https://doi.org/10.1594/PANGAEA.824482
  19. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17675-2. https://doi.org/10.1594/PANGAEA.824483
  20. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17676-2S. https://doi.org/10.1594/PANGAEA.824484
  21. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17677-2. https://doi.org/10.1594/PANGAEA.824485
  22. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17681-2. https://doi.org/10.1594/PANGAEA.824486
  23. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17682-2. https://doi.org/10.1594/PANGAEA.824487
  24. Horz, KH; Worthington, TJ; Winn, K et al. (2013): (Table 5) Trace-element analyses of the ash bed of sediment core GIK17684-1. https://doi.org/10.1594/PANGAEA.824488