Expedition 354 methods

France‐Lanord, Christian; Spieß, V.; Klaus, A.; Adhikari, R.R.; Adhikari, S.K.; Bahk, Jang-Jun; Baxter, A.T.; Cruz, J.W.; Das, S.K.; Dekens, P. S.; Duleba, Wânia; Fox, L.R.; Galy, Αlbert; Ge, Jun; Gleason, James D.; Gyawali, B.R.; Huyghe, Pascale; Jia, Guodong; Lantzsch, Hendrik; Manoj, M.C.; Martin, Y. Martos; Meynadier, L.; Najman, Yani; Nakajima, A.; Ponton, C.; Reilly, Brendan; Rogers, K.G.; Savian, J.F.; Schwenk, T.; Selkin, P.A.; Weber, Michael E; Williams, T.; Yoshida, Kohki

doi:10.14379/iodp/proc.354.102.2016

Cited by 6 publications

(53 citation statements)

References 34 publications

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“…Two core sections from hemipelagic calcareous clay Unit III (Lithostratigraphy) were scanned at high resolution using handheld X-ray fluorescence (XRF) for a total of 38 spot analyses (Section 354-U1453A-30F-3, 152.5-153.5 m CSF-A; Section 31F-2, 155.6-156.9 m CSF-A) ( Table T13; see Geochemistry and microbiology in the Expedition 354 methods chapter and Geochemistry and microbiology in the Site U1451 chapter [France-Lanord et al, 2016a, 2016b). The semiquantitative (uncalibrated) Ca abundances in these two core sections measured by XRF range from 0.3 wt% (volcanic ash) to 14.8 wt% Ca (calcareous clay), corresponding to a wide range of calculated carbonate contents (CaCO 3 = <2 to ~60 wt%) consistent with the silt, clay, calcareous clay, and ash lithologies present.…”

Section: X-ray Fluorescence Resultsmentioning

confidence: 99%

“…Lithostratigraphic summary, Hole U1453A. For legend, see Figure F5 in the Expedition 354 methods chapter (France-Lanord et al, 2016a). Unit IV is dominated by "soupy" fine sands and successions of sand and mud turbidites and contains one interval of calcareous clay.…”

Section: Unit Summariesmentioning

confidence: 99%

“…Sections where the sediment was sandy, watery, or heavily disturbed by the coring process were not measured. Magnetic polarity interpretation below is based on remanence vectors measured after 20 mT AF treatment; sandy, soupy, and deformed intervals; section edges; and core tops are not interpreted (see Paleomagnetism in the Expedition 354 methods chapter [France-Lanord et al, 2016a]).…”

Section: Planktonic Foraminifersmentioning

confidence: 99%

“…Sediments from oriented Cores 1H-4H and 29H that pass our quality criteria (see Paleomagnetism in the Expedition 354 methods chapter [France-Lanord et al, 2016a]) have ChRM directions after 20 mT demagnetization with declinations close to present-day magnetic north (Fisher [1953] mean declination = 340°).…”

Section: Magnetostratigraphymentioning

confidence: 99%

“…Polarity interpretation, Core 354-U1453A-31F. Circles = measurements that do not pass quality control criteria (see Paleomagnetism in the Expedition 354 methods chapter [France-Lanord et al, 2016a]). Blue dots = calcareous clay, black dots = other lithology, green dots = measurements on discrete samples.…”

Section: Interstitial Water Sampling and Chemistrymentioning

confidence: 99%

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Site U1453

France‐Lanord¹,

Spieß²,

Klauss³

et al. 2016

Proceedings of the International Ocean Discovery Program

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Contents 1 Site summary 3 Background and objectives 4 Operations 6 Lithostratigraphy 10 Biostratigraphy 11 Paleomagnetism 14 Geochemistry and microbiology 17 Physical properties 21 Downhole measurements 26 Stratigraphic synthesis 30 References Site summarySite U1453 (proposed Site MBF-4A) is in the center of our seven-site transect of shallow-penetration holes. It is located at 8°0.42′N, 86°47.90′E in a water depth of 3690.5 m. Combined with the other transect sites, Site U1453 will document depocenter migration and quantify overall sediment delivery to 8°N since the Pleistocene.Site U1453 is located ~1 km south and ~5 km east of a prominent surficial channel. The channel exhibits pronounced meandering point bars and internal terraces. Sediment transported by this channel has therefore significantly influenced deposition at this site during the channel's lifetime. A prominent buried point bar is located <1 km west of the site. The overall seismic reflectivity at the drill site is relatively high, indicating coarse material throughout most of the drilled section, except for the lower portion of the drill hole. Distinct and variable local spillover deposits were expected at the site in response to the channel and meander evolution. Toward the base of the hole, lower seismic reflectivity and distinct layering is inferred to reflect hemipelagic or distal levee deposition.In addition to coring, downhole logging was introduced as an important objective of Site U1453 after attempts to log at Sites U1450 and U1451 were unsuccessful. Logging data are essential for determining the inventory of lithofacies and structures in the fan given the limitations in completely recovering unconsolidated coarse material and the importance of measuring in situ physical properties and imaging fine-scale sedimentary structures. Therefore, we decided to log Hole U1453A despite its shallow ~215 m penetration to increase chances that we could acquire this critical in situ log data. This was particularly important for characterizing the in situ properties of thick sandy intervals that half-length advanced piston corer (HLAPC) cores returned as loose and liquefied sand. Principal resultsSite U1453 contributes to the overall seven-site transect drilled during Expedition 354. When integrated with the seismic profile and refined chronostratigraphic data from the remaining part of the transect, this site will document fan construction processes and the depocenter migration time frame. Specifically, Site U1453 provides an almost completely recovered succession of silt-and/or sanddominated sheeted units related to the formation and evolution of a large meandering channel system lacking a distinct levee unit. Intercalation of these sheets with thinner levee units either from the large channel or from nearby smaller channels may help us understand why the channel has been apparently maintained in this position for a relatively long time period. This type of configuration is part of the different processes that influence interlevee deposition. A few th...

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Section: X-ray Fluorescence Resultsmentioning

confidence: 99%

Section: Unit Summariesmentioning

confidence: 99%

Section: Planktonic Foraminifersmentioning

confidence: 99%

Section: Magnetostratigraphymentioning

confidence: 99%

Section: Interstitial Water Sampling and Chemistrymentioning

confidence: 99%

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Site U1453

France‐Lanord¹,

Spieß²,

Klauss³

et al. 2016

Proceedings of the International Ocean Discovery Program

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Site U1449

France‐Lanord¹,

Spieß²,

Klaus³

et al. 2016

Proceedings of the International Ocean Discovery Program

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Background and objectives 4 Operations 6 Lithostratigraphy 11 Biostratigraphy 12 Paleomagnetism 15 Geochemistry and microbiology 19 Physical properties 23 Downhole measurements 23 Stratigraphic synthesis 27 References Site summary Site U1449 (proposed Site MBF-6A) is part of our seven-site transect designed to document turbiditic transport processes and the architecture of deposition in the Middle Bengal Fan at 8°N since the Pleistocene. Sediments will also be used to trace sources of eroded material in the Himalaya and reconstruct erosion rates as a function of climate change. Site U1449 is located at 08°0.419′N, 088°6.599′E in a water depth of 3653 m. The main Hole U1449A penetrated to 213.5 m drilling depth below seafloor (DSF) and was cored by a combination of the advanced piston corer (APC), halflength APC (HLAPC), and extended core barrel (XCB) systems. Hole U1449B consists of a single APC core from the mudline taken for microbiological studies.

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