Data Report: Major Cation Concentrations of Interstitial Waters Collected from Deep Sediments of Eastern Equatorial Pacific and Peru Margin (ODP Leg 201)

Donohue, Catherine M.; Snyder, G. T.; Dickens, Gerald R.

doi:10.2973/odp.proc.sr.201.104.2006

Cited by 4 publications

(8 citation statements)

References 1 publication

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“…Inset in (g) also shows a better-resolved DIP concentration profile at a shallow depth. Data in panel a-c, e-g were taken from Shipboard Scientific Party (2003) and panel d were taken from Donohue et al (2006). sediment-water interface and systematically decreases with increase in sediment depth in all profiles.…”

Section: Sedimentary P Phasesmentioning

confidence: 99%

“…Inset in (g) shows DIP (circles with line and half-filled circles measured by Shipboard Party and in laboratory, respectively), and DOP (Open triangles) profile at shallow depth. Data in panel a-c, e-g were taken from Shipboard Scientific Party (2003) and panel d were taken from Donohue et al (2006). bacterial degradation of phosphorus-rich organic compounds and a change in redox condition that promotes the dissolution of Fe oxides (Figs.…”

Section: Dissolved Phosphate In Porewatermentioning

confidence: 99%

“…Inset in panel (g) shows high-resolution data of DIP (circles) and DOP (triangles). Data in panel a-c, e-g were taken from Shipboard Scientific Party (2003) and panel d were taken fromDonohue et al (2006).…”

mentioning

confidence: 99%

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Tracing sources and cycling of phosphorus in Peru Margin sediments using oxygen isotopes in authigenic and detrital phosphates

Jaisi

Blake

2010

Geochimica et Cosmochimica Acta

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Section: Sedimentary P Phasesmentioning

confidence: 99%

Section: Dissolved Phosphate In Porewatermentioning

confidence: 99%

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Tracing sources and cycling of phosphorus in Peru Margin sediments using oxygen isotopes in authigenic and detrital phosphates

Jaisi

Blake

2010

Geochimica et Cosmochimica Acta

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“…3). Good examples include the Baltic Sea (Jørgensen et al, 1990), Black Sea , Blake Ridge Borowski et al, 2001), Cariaco Trench (Reeburgh, 1976), Cascadia margin (Torres and Kastner, 2009), Gulf of Mexico (Kastner et al, 2008a;Hu et al, 2010;Smith and Coffin, 2014), Hydrate Ridge (Claypool et al, 2006), offshore Namibia (Niewohner et al, 1998), offshore Peru (Donohue et al, 2006), South China Sea (Luo et al, 2013;Hu et al, 2015), and Sea of Japan (Expedition Scientists, 2014). Moreover, in regions dominated by diffusion, fluxes of dissolved CH 4 can be estimated using Eq.…”

Section: Pore Water Chemistry Above Methane-charged Sedimentmentioning

confidence: 99%

“…Idealized pore water concentration profiles for high and low upward methane flux. Discrete data points for sites 722 (Arabian Sea; Seifert and Michaelis, 1991;D'Hondt et al, 2002) and 1230 (offshore Peru; Donohue et al, 2006) are given as reference. Hensen et al, 2003), largely because SO 2− 4 concentrations at the seafloor are nearly constant throughout the oceans.…”

Section: Pore Water Chemistry Above Methane-charged Sedimentmentioning

confidence: 99%

Pore water geochemistry along continental slopes north of the East Siberian Sea: inference of low methane concentrations

et al. 2017

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Abstract. Continental slopes north of the East Siberian Sea potentially hold large amounts of methane (CH 4 ) in sediments as gas hydrate and free gas. Although release of this CH 4 to the ocean and atmosphere has become a topic of discussion, the region remains sparingly explored. Here we present pore water chemistry results from 32 sediment cores taken during Leg 2 of the 2014 joint Swedish-Russian-US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions (SWERUS-C3) expedition. The cores come from depth transects across the slope and rise extending between the Mendeleev and the Lomonosov ridges, north of Wrangel Island and the New Siberian Islands, respectively. Upward CH 4 flux towards the seafloor, as inferred from profiles of dissolved sulfate (SO 2− 4 ), alkalinity, and the δ 13 C of dissolved inorganic carbon (DIC), is negligible at all stations east of 143 • E longitude. In the upper 8 m of these cores, downward SO 2− 4 flux never exceeds 6.2 mol m −2 kyr −1 , the upward alkalinity flux never exceeds 6.8 mol m −2 kyr −1 , and δ 13 C composition of DIC (δ 13 C-DIC) only moderately decreases with depth (−3.6 ‰ m −1 on average). Moreover, upon addition of Zn acetate to pore water samples, ZnS did not precipitate, indicating a lack of dissolved H 2 S. Phosphate, ammonium, and metal profiles reveal that metal oxide reduction by organic carbon dominates the geochemical environment and supports very low organic carbon turnover rates. A single core on the Lomonosov Ridge differs, as diffusive fluxes for SO 2− 4 and alkalinity were 13.9 and 11.3 mol m −2 kyr −1 , respectively, the δ 13 C-DIC gradient was 5.6 ‰ m −1 , and Mn 2+ reduction terminated within 1.3 m of the seafloor. These are among the first pore water results generated from this vast climatically sensitive region, and they imply that abundant CH 4 , including gas hydrates, do not characterize the East Siberian Sea slope or rise along the investigated depth transects. This contradicts previous modeling and discussions, which due to the lack of data are almost entirely based on assumption.

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Pore water profiles and authigenic mineralization in shallow marine sediments above the methane-charged system on Umitaka Spur, Japan Sea

Snyder

Hiruta

Matsumoto

et al. 2007

Deep Sea Research Part II: Topical Studies in Oceanography

110

107

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Data Report: Major Cation Concentrations of Interstitial Waters Collected from Deep Sediments of Eastern Equatorial Pacific and Peru Margin (ODP Leg 201)

Cited by 4 publications

References 1 publication

Tracing sources and cycling of phosphorus in Peru Margin sediments using oxygen isotopes in authigenic and detrital phosphates

Tracing sources and cycling of phosphorus in Peru Margin sediments using oxygen isotopes in authigenic and detrital phosphates

Pore water geochemistry along continental slopes north of the East Siberian Sea: inference of low methane concentrations

Pore water profiles and authigenic mineralization in shallow marine sediments above the methane-charged system on Umitaka Spur, Japan Sea

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