Diagenetic Reactions in Leg 104 Sediments Inferred from Isotope and Major Element Chemistry of Interstitial Waters

Aagaard, Per; Egeberg, Per Kristian; Smalley, P. C.

doi:10.2973/odp.proc.sr.104.122.1989

Cited by 12 publications

(17 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3). Pore waters within volcaniclastic-rich sediments have been shown to display a progressive decrease in δ 18 O with burial depth, as a result of alteration of volcanic glass to smectite and zeolite (Aagard, Egberg & Smalley, 1989). This alteration process will provide an abundance of metals that would then be available to be incorporated into the carbonate.…”

Section: Diagenesis and Isotope Signaturesmentioning

confidence: 98%

New constraints upon isotope variation during the early Cretaceous (Barremian–Cenomanian) from the Pacific Ocean

Price

2003

Geol. Mag.

View full text Add to dashboard Cite

Carbon and oxygen isotope data from a succession of Cretaceous (Barremian-Cenomanian) age recovered from the Pacific Ocean (DSDP site 463) are presented. The carbon isotope curve reveals a large isotope excursion within the early Aptian where δ 13 C values reach ∼4.8 ‰ in the L. cabri-G. ferreolensis foraminifera zone. A decrease in δ 13 C values is observed at the base G. algerianus zone, before a return to more positive values at the top of the G. algerianus-T. bejaouaensis zone. The pronounced early Aptian positive event is preceded by a large negative isotope excursion, confined to the G. blowi zone. Synchronous with this excursion are increased total organic carbon values and increases in Mn and Fe concentrations. Integrated biostratigraphic and magnetostratigraphic data, together with the carbon isotope profile, suggest that the organic-rich units of site 463 are correlatable with Oceanic Anoxic Event 1a. The input of isotopically light volcanic CO 2 in concert with the intensification and upwelling of intermediate water enriched in 12 C could account for the observed trends. A potential trigger may have been the destabilization of the water column and the prodigious CO 2 emissions associated with hydrothermal activity and the emplacement of the Ontong Java Plateau. Coupled with faunal evidence, the subsequent positive carbon isotope excursion is interpreted to be resulting from high, but decreasing, productivity and possibly increasing ocean stratification resulting in strong carbon isotopic gradients and 13 C-enriched surface waters. The decrease in δ 13 C within the G. algerianus zone is coincident with more positive δ 18 O values. If these are interpreted in terms of temperature this interval may be characterized by a period of cooling and possibly a waning of C org cycling. A return to lower δ 13 C values during the middle Albian is considered to be related to the increased influence of upwelling, as opposed to a waning of C org cycling. Upwelling introduced isotopically light carbon to the surface, arresting the stratified oceanic conditions.

show abstract

Section: Diagenesis and Isotope Signaturesmentioning

confidence: 98%

New constraints upon isotope variation during the early Cretaceous (Barremian–Cenomanian) from the Pacific Ocean

Price

2003

Geol. Mag.

View full text Add to dashboard Cite

show abstract

“…Given the local geology of the LV area and the occurrence of a mafic body ( Figure S1), barium leaching from igneous rocks is the most likely explanation for such high concentrations. and Vøring plateau (Aagaard et al, 1989; see Figure 1a for locations). These data overlap with three local meteoric water lines from mainland Norway (Lista) and Svalbard (Isfjorden and Ny Ålesund; see Figure 1a for locations).…”

Section: The Presence and Impact Of Fsgd From The LV Seepmentioning

confidence: 99%

“…1 = AKB: Alaska Kasitsna Bay(Lecher et al, 2016); 2 = CSM: Canning seafloor mound(Hart et al, 2011;Pohlman et al, 2011); 3 = CSS: Chukchi Sea shelf (Korea Institute of Geoscience and Mineral Resources, 2016); 4 = CBS: Canadian Beaufort Sea(Lecher et al, 2016;Paull et al, 2015); 5 = LSS: Laptev Sea shelf(Charkin et al, 2017); 6 = YP: Yamal Peninsula(Semenov et al, 2019); 7 = HF: Hornsund fjord (this study). 8 = SGHM: Storfjordrenna gas hydrate mounds (this study); 9 = LV: Lofoten-Vesterålen seep (this study); 10 = VP: Vøring Plateau(Aagaard et al, 1989); 11 = NB: Nordbreigrunnen(Storrø, 2012); 12 = GS: Greenland shelf(DeFoor et al, 2011); 13 = CF: Cambridge fjord(Hay, 1984). (b) Detailed bathymetry of the Lofoten-Vesterålen continental margin.…”

mentioning

confidence: 99%

Discharge of Meteoric Water in the Eastern Norwegian Sea since the Last Glacial Period

Hong

Lepland

Himmler

et al. 2019

Geophysical Research Letters

View full text Add to dashboard Cite

Submarine groundwater discharge could impact the transport of critical solutes to the ocean. However, its driver(s), significance over geological time scales, and geographical coverage are poorly understood. We characterize a submarine groundwater seep from the continental slope off northern Norway where substantial amount of meteoric water was detected. We reconstruct the seepage history from textural relationships and U‐Th geochronology of authigenic minerals. We demonstrate how glacial‐interglacial dynamics have promoted submarine groundwater circulation more than 100 km offshore and result in high fluxes of critical solutes to the ocean. Such cryosphere‐hydrosphere coupling is likely common in the circum‐Arctic implying that future decay of glaciers and permafrost in a warming Arctic is expected to attenuate such a coupled process and thus decreases the export of critical solutes.

show abstract

“…The low permeability of marine muds encountered at this site (Eldholm et al, 1987) makes pore-water advection unlikely. Variations in major elements and isotope composition determined on interstitial fl uid samples are consistent with diagenetic and alteration reactions and do not show evidence of an advective signal (Aagaard et al, 1989;Whiticar and Faber, 1989). To minimize the possibility of convection within the borehole, we minimized the hole diameter and fi lled it with low viscosity bentonite mud.…”

Section: Experimental Settingmentioning

confidence: 99%

Borehole Observatory Installations on IODP Expedition 306 Reconstruct Bottom-Water Temperature Changes in the Norwegian Sea

Harris

2006

Scientific Drilling

View full text Add to dashboard Cite

Figure 3. Assembling the data logger and thermistor string in the JOIDES Resolution Downhole Laboratory. The fi gure shows upper components of instrumentation. In the background (left) is the XN lock mandrel for latching the system into the CORK assembly. Foreground middle shows slip joint connecting the mandrel to battery pack housing. Foreground (right) shows pressure casing for bottom water temperature thermistor and back-up battery pack. Below this assembly is another housing containing batteries, data logger, and thermistor string.

show abstract

Diagenetic Reactions in Leg 104 Sediments Inferred from Isotope and Major Element Chemistry of Interstitial Waters

Cited by 12 publications

References 18 publications

New constraints upon isotope variation during the early Cretaceous (Barremian–Cenomanian) from the Pacific Ocean

New constraints upon isotope variation during the early Cretaceous (Barremian–Cenomanian) from the Pacific Ocean

Discharge of Meteoric Water in the Eastern Norwegian Sea since the Last Glacial Period

Borehole Observatory Installations on IODP Expedition 306 Reconstruct Bottom-Water Temperature Changes in the Norwegian Sea

Contact Info

Product

Resources

About