La pyrolyse Rock-Eval et ses applications. Première partie.

Espitalié, J.; Deroo, G.; Marquis, F.

doi:10.2516/ogst:1985035

Cited by 638 publications

(110 citation statements)

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“…One of the major factors controlling the TOC concentration is the carbonate content of the clays (BojesenKoefoed 1996; Marynowski et al 2007a). Kerogen from the clays was characterised by Bojesen-Koefoed (1996) as terrestrial type III (according to Espitalié et al 1985). Taking into account the molecular composition of the extracts from the clays, terrestrial biomarkers such as high molecular weight n-alkanes with an odd carbon number predominance (especially n-C 25 , n-C 29 , n-C 31 ), fernenes (see Zatoj et al 2006a, Marynowski et al 2007a, perylene, cadalene, Fig.…”

Section: Organic Matter Analysismentioning

confidence: 99%

Redox conditions during sedimentation of the Middle Jurassic (Upper Bajocian–Bathonian) clays of the Polish Jura (south-central Poland)

Zatoń

Marynowski

Szczepanik

et al. 2008

Facies

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Depositional redox conditions of the uppermost Bajocian-Bathonian (Middle Jurassic) ore-bearing clays of the Gnaszyn/Kawodrza area in the Polish Jura have been determined using an integrated geochemical (Th/U and U/Th ratios, degree of pyritisation (DOP), sulphur stable isotopes, biomarker analysis) and petrographic approach (measurements of pyrite framboid diameters, and microfacies analysis). The Th/U and U/Th ratios indicate that oxic conditions prevailed on the sea-Xoor during this interval, and 34 S isotopes suggest open-system conditions. DOP values, however, are rather scattered, and may reXect oxic, dysoxic, or anoxic conditions. We consider that the DOP values result from reducing conditions within the sediment and the chemistry of the pore-waters, rather than true seaXoor redox conditions. Pyrite framboid populations also indicate that dysoxic conditions prevailed within the sediment, beneath an oxygenated water column. Biomarker data did not provide any evidence of water column stratiWcation or anoxia during sedimentation of the Middle Jurassic clays.

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Section: Organic Matter Analysismentioning

confidence: 99%

Redox conditions during sedimentation of the Middle Jurassic (Upper Bajocian–Bathonian) clays of the Polish Jura (south-central Poland)

Zatoń

Marynowski

Szczepanik

et al. 2008

Facies

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“…RE is used to characterize the organic content of natural samples by thermal cracking (Espitalié et al, 1985;Behar et al, 2001). RE parameters such as the total organic carbon (TOC, %), the S2 (i.e.…”

Section: Methodsmentioning

confidence: 99%

Mass-movement and flood-induced deposits in Lake Ledro, southern Alps, Italy: implications for Holocene palaeohydrology and natural hazards

Simonneau

Chapron²,

Vannière

et al. 2013

Clim. Past

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High-resolution seismic profiles and sediment cores from Lake Ledro combined with soil and riverbed samples from the lake's catchment area are used to assess the recurrence of natural hazards (earthquakes and flood events) in the southern Italian Alps during the Holocene. Two well-developed deltas and a flat central basin are identified on seismic profiles in Lake Ledro. Lake sediments have been finely laminated in the basin since 9000 cal. yr BP and frequently interrupted by two types of sedimentary events (SEs): light-coloured massive layers and dark-coloured graded beds. Optical analysis (quantitative organic petrography) of the organic matter present in soil, riverbed and lacustrine samples together with lake sediment bulk density and grain-size analysis illustrate that light-coloured layers consist of a mixture of lacustrine sediments and mainly contain algal particles similar to the ones observed in background sediments. Light-coloured layers thicker than 1.5 cm in the main basin of Lake Ledro are synchronous to numerous coeval mass-wasting deposits remoulding the slopes of the basin. They are interpreted as subaquatic mass-movements triggered by historical and pre-historical regional earthquakes dated to AD 2005, AD 1891, AD 1045 and 1260, 2545, 2595, 3350, 3815, 4740, 7190, 9185 and 11 495 cal. yr BP. Dark-coloured SEs develop high-amplitude reflections in front of the deltas and in the deep central basin. These beds are mainly made of terrestrial organic matter (soils and lignocellulosic debris) and are interpreted as resulting from intense hyperpycnal flood event. Mapping and quantifying the amount of soil material accumulated in the Holocene hyperpycnal flood deposits of the sequence allow estimating that the equivalent soil thickness eroded over the catchment area reached up to 5 mm during the largest Holocene flood events. Such significant soil erosion is interpreted as resulting from the combination of heavy rainfall and snowmelt. The recurrence of flash flood events during the Holocene was, however, not high enough to affect pedogenesis processes and highlight several wet regional periods during the Holocene. The Holocene period is divided into four phases of environmental evolution. Over the first half of the Holocene, a progressive stabilization of the soils present through the catchment of Lake Ledro was associated with a progressive reforestation of the area and only interrupted during the wet 8.2 event when the soil destabilization was particularly important. Lower soil erosion was recorded during the mid-Holocene climatic optimum (8000–4200 cal. yr BP) and associated with higher algal production. Between 4200 and 3100 cal. yr BP, both wetter climate and human activities within the drainage basin drastically increased soil erosion rates. Finally, from 3100 cal. yr BP to the present-day, data suggest increasing and changing human land use

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“…Detailed method descriptions and result determinations for the Rock-Eval 6 pyrolysis method were given by Lafargue et al (1998) and Behar et al (2001). In this study the method of Espitalie et al (1985aEspitalie et al ( , 1985b was utilized to evaluate the organic geochemical attributes of the studied rocks. The interpretive guidelines used were from Katz (1983), Tissot and Welte (1984), Peters (1986), Peters and Cassa (1994), Dymann et al (1996), Hunt (1996), and Jarvie and Tobey (1999).…”

Section: Methodsmentioning

confidence: 99%

Eocene to Early Oligocene turbidite sedimentation in the SE Aegean (Karpathos Island, SE Greece): stratigraphy, facies analysis, nannofossil study, and possible hydrocarbon potential

Pantopoulos¹,

Zelilidis²

2014

Turkish J Earth Sci

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La pyrolyse Rock-Eval et ses applications. Première partie.

Cited by 638 publications

References 0 publications

Redox conditions during sedimentation of the Middle Jurassic (Upper Bajocian–Bathonian) clays of the Polish Jura (south-central Poland)

Redox conditions during sedimentation of the Middle Jurassic (Upper Bajocian–Bathonian) clays of the Polish Jura (south-central Poland)

Mass-movement and flood-induced deposits in Lake Ledro, southern Alps, Italy: implications for Holocene palaeohydrology and natural hazards

Eocene to Early Oligocene turbidite sedimentation in the SE Aegean (Karpathos Island, SE Greece): stratigraphy, facies analysis, nannofossil study, and possible hydrocarbon potential

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