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- Contents
- Title page
- Publisher′s notes
- Abstract
- Schedule for Expedition 356
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 Introduction
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Background
- Scientific objectives
- Drilling and coring strategy
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Downhole measurements strategy
- Risks and contingency
- Sampling and data sharing strategy
- References
- Tables
- Figures
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Site summaries
- Appendix figures
- AF1. Bathymetric map, Sites NWS-6A, NWS-5A, NWS-13A, and NWS-12A.
- AF2. Multichannel seismic profile, Site NWS-6A.
- AF3. Multichannel seismic profile, Sites NWS-6A and NWS-13A.
- AF4. Multichannel seismic profile, Site NWS-5A.
- AF5. Multichannel seismic profile, Sites NWS-5A and NWS-12A.
- AF6. Bathymetric map, Sites NWS-3A, NWS-4A, NWS-9A, NWS-10A and NWS-11A.
- AF7. Multichannel seismic profile, Sites NWS-10A and NWS-11A.
- AF8. Multichannel seismic profile, Site NWS-4A.
- AF9. Multichannel seismic profile, Sites NWS-3A and NWS-9A.
- AF10. Multichannel seismic profile, Site NWS-9A.
- AF11. Bathymetric map, Sites NWS-1A, NWS-2A, NWS-7A, and NWS-8A.
- AF12. Multichannel seismic profile, Sites NWS-2A and NWS-8A.
- AF13. Multichannel seismic profile, Site NWS-8A.
- AF14. Multichannel seismic profile, Site NWS-1A.
- AF15. Multichannel seismic profile, Sites NWS-1A and NWS-7A.
- Expedition scientists and scientific participants
- PDF file
- Errata
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doi:10.14379/iodp.sp.356.2014
Site summaries
Site NWS-6A
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Priority:
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Primary
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Position:
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28.6641°S, 113.5778°E |
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Water depth (m):
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152
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Target drilling depth (mbsf):
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330
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Approved maximum penetration (mbsf):
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330
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Survey coverage (track map; seismic profile):
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Map (Fig. AF1)
Seismic profiles (Figs. AF2, AF3)
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Objective(s):
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This site is near the Houtman-Abrolhos main reef complex, which contains the most southerly tropical reefs in the Indian Ocean. Their evolution is directly related to the path of the Leeuwin Current. Dating, coupled with seismic correlation, may provide insight into the pre-Quaternary history of these reefs and a long-term perspective on Leeuwin Current evolution at the tropical/subtropical boundary off western Australia. It has been suggested that subsidence rates over 140 k.y. were very low compared to the reefs of the Carnarvon Basin (Collins and Testa, 2010). Subsidence analyses of the shelf wedge drilled at this site may extend this record back millions of years and allow more precise modeling of dynamic subsidence along the western margin of Australia. Finer grained facies in this section may also yield a Pliocene–Pleistocene record of the onset and variability of the southern Australian winter-dominated rainfall regime.
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Drilling program:
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Triple APC, double XCB
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Logging program or downhole measurements program:
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Triple combo, FMS, VSP
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Nature of rock anticipated:
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Calcarenites, calcilutites
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