Proceedings of the Ocean Drilling Program, 150X Initial Reports

Miller, Kenneth G.; Browning, James V.; Liu, Chengjie; Sugarman, Peter J.; Kent, Dennis V.; Fossen, M van; Queen, D.; Goss, Matthew; Gwynn, David M.; Mullikin, Lloyd; Feigenson, Mark D.; Aubry, Marie‐Pierre; Burckle, L.

doi:10.2973/odp.proc.ir.150x.1994

Cited by 30 publications

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“…Coreholes were drilled in the New Jersey coastal plain as part of ODP Legs 150X and 174AX (Miller et al, 1994;Miller, Sugarman, Browning, et al, 1998), and despite the obvious lack of seismic profiles tying these sites, correlations have been made (Table T10). Miller et al (1997) bases ties on chronostratigraphy; Monteverde (2008) bases ties on synthetic seismograms of well data both offshore and onshore to profiles of the CH0698 grid.…”

Section: Sequences In Seismic Profilesmentioning

confidence: 99%

Methods

2010

Proceedings of the IODP

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Numbering of sites, holes, cores, and samples Expedition numbers for IODP expeditions are sequential, starting with 301. Drilling sites are numbered consecutively, and for a European Consortium for Ocean Research Drilling (ECORD) Science Operator (ESO)-operated platform, numbering starts with Site M0001 (the "M" indicates the ESO-operated mission-specific platform [MSP]). For Expedition 313, the first site was Site M0027. Although not applicable to Expedition 313, multiple holes may be drilled at a single site. For all IODP drill sites, a letter suffix distinguishes each hole drilled at one site. The first hole drilled is assigned the site number with the suffix "A," the second hole takes the site number and the suffix "B," and so forth. For Expedition 313, only one hole was drilled at each site, so all holes take the suffix "A." The cored interval is measured by the drillers in meters below seafloor (mbsf). The depth below seafloor was determined by subtracting the initial drill pipe measurement to seafloor from the total drill pipe measurement. For Expedition 313, the cored interval normally consisted of the entire drilled section, but in some cases intervals were drilled without coring (e.g., the top of Hole M0028A and other intervals between spot cores). Recovered core is split into sections with a maximum length of 1.5 m and numbered sequentially from the top, starting at 1 (Fig. F1). By convention, material recovered from the core catcher of a sedimentary core is treated as a separate section labeled "CC" (core catcher) and placed below the last section recovered in the liner. The core catcher is assigned to the top of the cored interval if no other material is recovered. When recovered core is shorter than the cored interval, the top of the core, by convention, is equated Methods 1 Expedition 313 Scientists 2 Chapter contents Introduction .

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Section: Sequences In Seismic Profilesmentioning

confidence: 99%

Methods

2010

Proceedings of the IODP

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Carbonate and silicate cementation of siliciclastic sediments of the New Jersey shelf (IODP Expedition 313): relation with organic matter diagenesis and submarine groundwater discharge

et al. 2017

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International audienceThe New Jersey continental shelf extends 150 km off the shoreline. During IODP Expedition 313, siliciclastic deposits of late Eocene to late Pleistocene age were drilled down to 631, 669 and 755 m below seafloor at sites 27A, 28A and 29A respectively in very shallow waters (33.5 to 36 m depth). Pore water salinities display multilayered brackish-salty-brine units 10 to 170 m thick, where low-salinity water is preferentially stored in fine-grained sediments. The sharp boundaries of these buried aquifers are often marked by cemented layers a few centimetres thick. The mineralogy and scanning electron microscope observations of these layers show two phases of cementation by authigenic minerals: (1) the early carbonate cement is frequently associated with pyrite, and (2) the late silicate cement infills the residual porosity. The isotopic compositions of the carbonate cements vary widely: −2.4 < δ¹⁸O ‰ VPDB < +2.8; −15.1 < δ¹³C ‰ VPDB < +15.6. The δ¹⁸O values indicate that the carbonate cements precipitated with pore waters comprising variable mixtures of seawater and ¹⁸O-depleted fresh water originating from submarine groundwater discharge. The δ¹³C values of the carbonate cements are related to organic matter diagenesis, providing ¹³C-depleted dissolved inorganic carbon during bacterial sulphate reduction and anaerobic oxidation of methane, and ¹³C-rich dissolved inorganic carbon during methanogenesis. The diagenetic cementation processes included chemical weathering of reactive silicate minerals by the CO²-rich pore waters issued from organic matter diagenesis that released bicarbonate, cations and dissolved silica, which were further precipitated as carbonate and silicate cements. The estimated range of temperature (18±4 °C) during carbonate precipitation is consistent with carbonate cementation at moderate burial depths; however, silicate cementation occurred later during diagenesis at deeper burial depths

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