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doi:10.2204/iodp.proc.317.105.2011

Site U1353¹

Expedition 317 Scientists²

Background and objectives

Hole U1353A

• Position: 44°46.1079′S, 171°40.4368′E

• Start hole: 0230 h, 22 December 2009

• End hole: 1115 h, 22 December 2009

• Time on hole (d): 0.36

• Seafloor (drill pipe measurement from rig floor, m DRF): 95.5 (APC mudline)

• Distance between rig floor and sea level (m): 11.3

• Water depth (drill pipe measurement from sea level, m): 84.2

• Total depth (drill pipe measurement from rig floor, m DRF): 151.5

• Total penetration (m DSF): 56.0

• Total length of cored section (m): 56.0

• Total core recovered (m): 56.38

• Core recovery (%): 101

• Total number of cores: 8

Hole U1353B

• Position: 44°46.1203′S, 171°40.4407′E

• Start hole: 1115 h, 22 December 2009

• End hole: 2050 h, 26 December 2009

• Time on hole (d): 4.40

• Seafloor (drill pipe measurement from rig floor, m DRF): 96.0 (APC mudline)

• Distance between rig floor and sea level (m): 11.3

• Water depth (drill pipe measurement from sea level, m): 84.7

• Total depth (drill pipe measurement from rig floor, m DRF): 710.3

• Total penetration (m DSF): 614.3

• Total length of cored section (m): 614.3

• Total core recovered (m): 211.48

• Core recovery (%): 34

• Total number of cores: 98

Hole U1353C

• Position: 44°46.0982′S, 171°40.4380′E

• Start hole: 2050 h, 26 December 2009

• End hole: 2100 h, 28 December 2009

• Time on hole (d): 2.01

• Seafloor (drill pipe measurement from rig floor, m DRF): 96.0 (by proxy, Hole U1353B)

• Distance between rig floor and sea level (m): 11.3

• Water depth (drill pipe measurement from sea level, m): 84.7

• Total depth (drill pipe measurement from rig floor, m DRF): 625.0

• Total penetration (m DSF): 529.0

• Total length of cored section (m): 0

• Total core recovered (m): 0

• Core recovery (%): 0

• Total number of cores: 0

Integrated Ocean Drilling Program (IODP) Site U1353 (proposed Site CB-01A) is located on the middle shelf (85 m water depth) within the Canterbury Bight and is the most landward shelf site of the Canterbury Basin drilling transect. Site U1353 is located on dip seismic Profile EW00-01-66 and crossing strike Profile EW00-01-01 (Figs. F1, F2).

The philosophy behind the transect approach is discussed in "Background and objectives" in the "Site U1351" chapter. Site U1353 was considered the most challenging site, both because the water depth at this site was the shallowest of all Expedition 317 sites and also because the lithologies at this inboard setting were expected to be the coarsest grained. Site U1353 was therefore drilled, in accordance with the proposed drilling strategy, after the drillers had gained experience in shallow-water (122 m) drilling at Site U1351 and at slope Site U1352.

Site U1353 penetrates a middle Miocene to Holocene section containing seismic sequence boundaries U5–U19 (Lu and Fulthorpe, 2004). All sequence boundaries were penetrated landward of their rollovers or paleoshelf edges with the goal of recovering proximal facies, yielding evidence of shallow-water deposition, and providing optimal paleowater depths from benthic foraminiferal biofacies.

The principal objectives at Site U1353 were

1. To sample facies landward of rollovers of progradational seismic sequence boundaries U5–U19 and in particular to use benthic foraminiferal biofacies to estimate paleowater depths both above and below sequence boundaries in order to calculate eustatic amplitudes using two-dimensional backstripping; and

2. To investigate the facies, paleoenvironments, and depositional processes associated with the sequence stratigraphic model in a proximal setting on a prograding continental margin where sequence architecture is well constrained by seismic imaging.

¹Expedition 317 Scientists, 2011. Site U1353. In Fulthorpe, C.S., Hoyanagi, K., Blum, P., and the Expedition 317 Scientists, Proc. IODP, 317: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.317.105.2011

²Expedition 317 Scientists' addresses.

Publication: 4 January 2011
MS 317-105

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