Soils, slopes and source rocks: Application of a soil chemistry model to nutrient delivery to rift lakes

Harris, Nicholas B.; Tucker, Gregory E.

doi:10.1016/j.sedgeo.2015.04.003

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…Previous studies have shown that OC and SR accumulation are controlled by the complex interplay of primary productivity, dilution and preservation of OM, which are further influenced by a number of factors such as lake level fluctuations, changes in hinterland and basin slope angles and inorganic sediment and terrestrial OM input 3,6,7,[10][11][12][50][51][52][53][54] . Despite recent progress in understanding these processes (e.g., Bohacs et al 55 , Ellis et al 6 ), SR accumulation in rift-lake systems is particularly complex and therefore remains hard to generalize 3 .…”

Section: Discussionmentioning

confidence: 99%

“…These studies have revealed the importance of factors such as width-depth ratio on the lake’s mixing potential, primary productivity and anoxia 10 . In addition to internal nutrient recycling, hinterland derived nutrient supply can be important for productivity, and depend on evolution of the hinterland topography 3 , 12 . Several studies have also documented the sensitivity of lake levels for high-frequency climatic changes 5 , 11 , 13 , a feature that is less straightforward to reconstruct from ancient sediment series.…”

Section: Introductionmentioning

confidence: 99%

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Factors controlling accumulation of organic carbon in a rift-lake, Oligocene Vietnam

Rizzi

Hovikoski

Schovsbo

et al. 2020

Sci Rep

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Understanding of the processes of petroleum source rock (SR) accumulation in lacustrine rift basins and the behavior of lake systems as long-term carbon sinks is fragmentary. Investigation of an 800 m thick (500 m core and ~ 300 m outcrop), deep-lacustrine, Oligocene section in Vietnam, provides a rare insight into the controls and deposition of organic carbon (OC) and SR formation in continental rift basins. A multidisciplinary dataset, combining elemental data, inorganic and organic geochemistry with sedimentology, shows that the richest alginite-prone, sapropelic SR developed during periods of relative tectonic quiescence characterized by moderate primary productivity in a mainly dysoxic lacustrine basin. Increased rift activity and further development of graben morphology intensified water column stratification and anoxia, which hindered nutrient recycling. Sapropelic organic matter (OM) continued to accumulate, but with increasing amorphous OM content and decreasing total OC values. Periods of increased seasonality were characterized by thermocline weakening, enhanced mixing of water columns, increased primary productivity and diatom blooming. The results suggest that a change from dysoxia towards anoxia or extreme primary productivity does not necessarily enhance OC burial and SR quality. External nutrient input from a phosphate-rich hinterland is sufficient for sapropel formation, whereas the main limiting factor is methanogenesis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Factors controlling accumulation of organic carbon in a rift-lake, Oligocene Vietnam

Rizzi

Hovikoski

Schovsbo

et al. 2020

Sci Rep

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Smart composite useful to acid release

Grance¹,

Santos

Andrade³

et al. 2015

J of Applied Polymer Sci

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This work presents a smart composite prepared using a resin based on cardanol and furfural, filled with Al 2 O 3 . This material is inert at room temperature. However, it is able to release an active substance after a certain temperature is reached. The obtained materials were characterized by Fourier transform spectroscopy, X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis, and differential scanning calorimetry. In addition, cure degree and acid-release tests were performed. According to the obtained data, acid is trapped inside the composites, remaining inactive in the structure while the melting temperature of the hydrophobic shell is not reached. After it is, acid is released and the pH decreases. Therefore, this smart composite could be useful in speeding up drilling in sedimentary rocks with a combination of chemical (acid release) and physical (mechanical wear) mechanisms.

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Carbon isotope stratigraphy in an Oligocene deep syn-rift lake, Gulf of Tonkin, Vietnam: Implications for in-lake isotope fractionation and correlation to the global δ13C trend

et al. 2021

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Soils, slopes and source rocks: Application of a soil chemistry model to nutrient delivery to rift lakes

Cited by 4 publications

References 42 publications

Factors controlling accumulation of organic carbon in a rift-lake, Oligocene Vietnam

Factors controlling accumulation of organic carbon in a rift-lake, Oligocene Vietnam

Smart composite useful to acid release

Carbon isotope stratigraphy in an Oligocene deep syn-rift lake, Gulf of Tonkin, Vietnam: Implications for in-lake isotope fractionation and correlation to the global δ13C trend

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