Argillaceous Sediment Dewatering

Burst, John F.

doi:10.1146/annurev.ea.04.050176.001453

Cited by 32 publications

(11 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to Lawrence and Gieskes (1981), we adopt the idea that the interlayer water has an ice-like structure (Burst, 1976) and assume that it will concentrate ls O to the same extent as ice. A closed system material balance employing the fractionation factors listed in Table 2 and a S 18 0 composition of volcanic glass of 8% 0 (SMOW) (Taylor, 1968), shows that he observed shifts in pore water 5 ls O signatures could be brought about by alteration of less than 5% (volume) calc alkalic material.…”

Section: Model Calculationmentioning

confidence: 99%

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

Aagaard¹,

Egeberg²,

Smalley³

1989

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

The variations in major elements and isotope composition (87 Sr/ 86 Sr, <5 18 0, <5D) of interstitial waters in Leg 104 sediments is most probably caused by the alteration of volcanic matter. A reaction scheme where volcanic glass reacts with pore-water magnesium and potassium to form trioctahedral smectite, phillipsite, and chert is proposed. Model calculations demonstrate that the pore waters may evolve their negative 6 18 0 signatures without recourse to unreasonably large amounts of volcanic detritus or external sources.

show abstract

Section: Model Calculationmentioning

confidence: 99%

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

Aagaard¹,

Egeberg²,

Smalley³

1989

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

show abstract

“…The result of both the preceding lines of investigation was negative: we could not categorically prove the existence of such a velocity-inversion zone from our data. We can conclude that (1) the seismic refraction data do not have the resolution to discriminate such a feature as 400 m of sediment, (2) the sediment is not continuous in thickness and/or velocity, or (3) any subduct-ed sediments present may already be partially dewatered and compacted (Burst, 1976), and are now at a higher velocity than 1.7 km/s. In any event, we think that it would be difficult to use seismic refraction data as a tool to determine the existence of layer 400 m or less in thickness.…”

Section: Linementioning

confidence: 93%

Structure at the Toe of the Subduction Complex: Middle America Trench offshore Guatemala

Ambos¹,

Hussong²

1985

Initial Reports of the Deep Sea Drilling Project

View full text Add to dashboard Cite

During DSDP Leg 67, seismic refraction data were collected in the lower slope region of the Middle America Trench using ocean-bottom seismometers. Near the trench, the transition between the overlying (Caribbean) and underlying (Cocos) plates was found to be marked by an abrupt velocity increase. Landward of the trench, velocities in the upper plate increase, and as a consequence the plate/plate boundary is seismically less clearly defined. The landward velocity increase in the upper plate is gradual, and no evidence was found to suggest the existence of imbedded slabs of highvelocity ocean crust.

show abstract

“…It has been correlated in many studies with the processes of hydrocarbon maturation and expulsion (Burst 1976), and has been suggested to be a primary control of overpressure development in shales (Powers 1967). For these reasons, the processes resulting in the formation of illite in shales have been the focus of considerable research for over 3 decades.…”

Section: Background and Approachmentioning

confidence: 99%

Comparison of the Mineralogical and Chemical Composition of 2 Shales from the Western Canada Sedimentary Basin and the United States Gulf Coast

Caritat

Bloch²,

Hutcheon

et al. 1997

Clays and clay miner.

View full text Add to dashboard Cite

Abstract--The mineralogy and geochemistry of shales reflect the composition of the initially deposited precursor mud, subsequently modified by diagenetic processes. To see if significant geochemical differences exist between shales that mainly owe their present-day composition to either deposition or diagenesis, we compare the published mineralogical, bulk and clay-fraction geochemical, and clay-fraction O-isotopic compositions of 2 shales. One shale is from the Western Canada Sedimentary Basin (WCSB), and its composition mainly reflects primary (depositional) chemical and mineralogical variations (smectitic to illitic illite/smectite) within this unit. The other shale is from the United States Gulf Coast (USGC), and its composition mainly reflects mixed-layer illite/smectite (US) diagenesis of deposited smectitic clay material. The chemical and mineralogical trends of WCSB and USGC shales, including one of increasing illite content in US with depth or maturity, are essentially indistinguishable, in both bulk shale and clay fraction, despite the contrasting genetic interpretations for the origin of the contained US. Thus, similar mineralogical and chemical trends with depth or temperature can result either from inherited depositional compositional heterogeneity of the sediment, from burial metamorphism of shale or a combination of both. Interestingly, the O-isotopic compositions of the clay fractions from the WCSB and USGC are significantly different, a fact that reflects original clay formation from source material and water of quite different isotopic compositions. The discrimination between depositional and diagenetic contributions to shale composition continues to pose challenges, but a combination of bentonite, illite polytype, clay isotopic and trace and rare earth elemental analyses together with illite age analysis holds promise for future work;

show abstract

Argillaceous Sediment Dewatering

Cited by 32 publications

References 17 publications

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

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

Structure at the Toe of the Subduction Complex: Middle America Trench offshore Guatemala

Comparison of the Mineralogical and Chemical Composition of 2 Shales from the Western Canada Sedimentary Basin and the United States Gulf Coast

Contact Info

Product

Resources

About