Geochemical Sediment Analysis Procedures

Jablonski, Sarah A.; Mecray, E. L.; Munson, J.M.; Blackwood, Dann S.

doi:10.3133/ofr02371

Cited by 5 publications

(4 citation statements)

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“…CHN contents of dried sediment were determined with a Perkin Elmer 2400 series II Carbon-Hydrogen-Nitrogen-Sulphur-Oxygen Analyzer which used a combustion method to convert sample elements to simple gases such as CO 2 , H 2 O, and N 2 (Jablonski et al, 2002;Verardo et al, 1990). The resulting gases were homogenized, depressurized, and quantified as a function of their thermal conductivities.…”

Section: Carbon Hydrogen and Nitrogen (Chn) Contentsmentioning

confidence: 99%

Physical properties of sediments from Keathley Canyon and Atwater Valley, JIP Gulf of Mexico gas hydrate drilling program

Winters

Dugan

Collett

2008

Marine and Petroleum Geology

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a b s t r a c tPhysical property measurements and consolidation behavior are different between sediments from Atwater Valley and Keathley Canyon in the northern Gulf of Mexico. Void ratio and bulk density of Atwater Valley sediment from a seafloor mound (holes ATM1 and ATM2) show little effective stress (or depth) dependence to 27 meters below seafloor (mbsf), perhaps owing to fluidized transport through the mound itself with subsequent settling onto the seafloor or mound flanks. Off-mound sediments (hole AT13-2) have bulk physical properties that are similar to mound sediments above 27 mbsf, but void ratio and porosity decrease below that depth. Properties of shallow (<50 mbsf) Keathley Canyon sediments (KC151-3) change with increasing effective stress (or depth) compared to Atwater Valley, but vary little below that depth. Organic carbon is present in concentrations between typical near-shore and deep-sea sediments. Organic carbon-to-nitrogen ratios suggest that the organic matter contained in Atwater Valley off-mound and mound sites came from somewhat different sources. The difference in organic carbon-to-nitrogen ratios between Atwater Valley and Keathley Canyon is more pronounced. At Keathley Canyon a more terrigenous source of the organic matter is indicated. Grain sizes are typically silty clay or clay within the two basins reflecting similar transport energy. However, the range in most shallow sediment properties is significantly different between the two basins. Bulk density profiles agree with logging results in Atwater Valley and Keathley Canyon. Agreement between lab-derived and loggingderived properties supports using logging data to constrain bulk physical properties where cores were not collected.Published by Elsevier Ltd.

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Section: Carbon Hydrogen and Nitrogen (Chn) Contentsmentioning

confidence: 99%

Physical properties of sediments from Keathley Canyon and Atwater Valley, JIP Gulf of Mexico gas hydrate drilling program

Winters

Dugan

Collett

2008

Marine and Petroleum Geology

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“…To measure black carbon, traditional methods require the removal of inorganic carbon using the same methodology as that used to prepare samples for organic carbon analysis, with either sulphurous acid Jablonski et al, 2002;Phillips et al, 2011) or hydrochloric acid (Komada, 2008;Brodie et al, 2011). Following removal of inorganic carbon, there are a number of methods used to quantify fractions of black carbon (Hammes et al, 2007; Table 2).…”

Section: Black Carbon Quantificationmentioning

confidence: 99%

Blue Carbon: Beyond the Inventory

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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“…To measure black carbon, traditional methods require the removal of inorganic carbon using the same methodology as that used to prepare samples for organic carbon analysis, with either sulphurous acid (Verardo et al, 1990;Jablonski et al, 2002;Phillips et al, 2011) or hydrochloric acid (Komada, 2008;Brodie et al, 2011). Following removal of inorganic carbon, there are a number of methods used to quantify fractions of black carbon (Hammes et al, 2007; Table 2).…”

Section: Black Carbon Quantificationmentioning

confidence: 99%

Sedimentary carbon on the continental shelf: Emerging capabilities and research priorities for Blue Carbon

et al. 2022

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Continental shelf sediments store large amounts of organic carbon. Protecting this carbon from release back into the marine system and managing the marine environment to maximize its rate of accumulation could both play a role in mitigating climate change. For these reasons, in the context of an expanding “Blue Carbon” concept, research interest in the quantity and vulnerability of carbon stored in continental shelf, slope, and deep ocean sediments is increasing. In these systems, carbon storage is physically distant from carbon sources, altered between source and sink, and disturbed by anthropogenic activities. The methodological approaches needed to obtain the evidence to assess shelf sea sediment carbon manageability and vulnerability within an evolving blue carbon framework cannot be transferred directly from those applied in coastal vegetated “traditional” blue carbon habitats. We present a toolbox of methods which can be applied in marine sediments to provide the evidence needed to establish where and when marine carbon in offshore sediments can contribute to climate mitigation, focusing on continental shelf sediments. These methods are discussed in the context of the marine carbon cycle and how they provide evidence on: (i) stock: how much carbon is there and how is it distributed? (ii) accumulation: how rapidly is carbon being added or removed? and (iii) anthropogenic pressures: is carbon stock and/or accumulation vulnerable to manageable human activities? Our toolbox provides a starting point to inform choice of techniques for future studies alongside consideration of their specific research questions and available resources. Where possible, a stepwise approach to analyses should be applied in which initial parameters are analysed to inform which samples, if any, will provide information of interest from more resource-intensive analyses. As studies increasingly address the knowledge gaps around continental shelf carbon stocks and accumulation – through both sampling and modelling – the management of this carbon with respect to human pressures will become the key question for understanding where it fits within the blue carbon framework and within the climate mitigation discourse.

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Geochemical Sediment Analysis Procedures

Cited by 5 publications

References 0 publications

Physical properties of sediments from Keathley Canyon and Atwater Valley, JIP Gulf of Mexico gas hydrate drilling program

Physical properties of sediments from Keathley Canyon and Atwater Valley, JIP Gulf of Mexico gas hydrate drilling program

Blue Carbon: Beyond the Inventory

Sedimentary carbon on the continental shelf: Emerging capabilities and research priorities for Blue Carbon

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