Carbon isotope fractionation during the precipitation of calcium carbonate

Emrich, K.; Ehhalt, D. H.; Vogel, J. C.

doi:10.1016/0012-821x(70)90109-3

Cited by 554 publications

(176 citation statements)

References 11 publications

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“…The highly depleted δ 18 O values may either be due to increase in temperature or/and 18 O-depleted fluids. The slight shift in δ 13 C of dolomites with respect to the host limestone can be explained by the slight temperature fractionation of 0.03‰ per degree Celsius (Emrich et al, 1970). The estimated salinity of the primary inclusions of these dolomite facies are three to four time greater than seawater (12-21 eq.…”

Section: Chemistry Of Dolomitising Fluidsmentioning

confidence: 93%

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Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

Shah

Nader

García

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Section: Chemistry Of Dolomitising Fluidsmentioning

confidence: 93%

“…However some depleted values can also be possibly explained by contamination with calcite (TC) in the analysed samples ( Fig. 11a, b; Emrich et al, 1970); this latter cement (i.e. TC) having a relatively depleted δ 18 O signature.…”

Section: Chemistry Of Dolomitising Fluidsmentioning

confidence: 99%

Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

Shah

Nader

García

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…On a global average they were lowered by about 0.4-0.50/00, and by up to 0.9 0/00 below high-productivity zones where the sea ftoor was frequently covered by organic ftuff Samthein et al, 1988). These numbers demonstrate the increased role of the glacial deep ocean as a sink for (organic o .... Emrich et al (1970) for bicarbonate-carbonate 13C fractionation and CLIMAP (1981) data).The regression line shown has r=0.81 (n=28). carbon and) CO 2 and nutrients, whereas the intermediate waters were CO 2 depleted (Boyle, 1988;Zahn et al, 1987;Kallel et al, 1988).…”

Section: Figure 3d (Concluded)mentioning

confidence: 91%

Reconstruction of Low and Middle Latitude Export Productivity, 30,000 Years BP to Present: Implications for Global Carbon Reservoirs

Sarnthein¹,

Winn²

1990

Climate-Ocean Interaction

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ABSTRACf. BasOO on organic carbon accumulation rates, nine time slices of oceanic export paleoproductivity (Pnew) are presentOO which depict the variability of P new on aglobal scale through the last 30,000 years and document that the basic distribution patterns did not change through glacial and interglacial times.However, the glacial ocean shows an increased contrast of high-versus low-productivity zones. Ö 13 C values of near-surface-dwelling planktonic foraminifera Globigerinoides ruber suggest that the same contrast applies to the glacial nutrient inventories of the ambient surface waters, with a significant glacial transfer of P0 4 from low-to high-productivity zones. In this way, glacial P new increasOO by a global average of about 2-4 Gt Cyc 1 and 100, via an enhancOO caCo 3 dissolution and alkalinity in the deep ocean, to a significant extraction of CO 2 from the surface water and the atrnosphere.

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“…Modern Norfolk glacial till groundwater has dissolved inorganic carbon (DIC) δ 13 C values around −21.3 ‰ (Feast et al 1997), which at modern groundwater temperatures, and known empirical fractionation effects between DIC and CaCO 3 (e.g. Emrich, Ehhalt & Vogel, 1970), could precipitate calcite with values as negative as −11 ‰. The most negative δ 13 C for modern British calcitic tufa deposits from groundwater-fed streams is −11.9 ‰ (Andrews, Riding & Dennis, 1993), and values below this (e.g.…”

Section: A Calculating δ 18 O Of the Cementmentioning

confidence: 99%

Geochemical constraints on the origin of enigmatic cemented chalks, Norfolk, UK

et al. 2008

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-Very hard cemented chalk stacks and crusts found locally in the upper part of the Cretaceous Chalk of north Norfolk, UK, are related to solution features. The solution features, mainly pipes and caves, formed after deposition of the overlying Middle Pleistocene Wroxham Crag, probably by routing of sub-glacial, or glacial, melt-waters derived from late Pleistocene glaciers. New geochemical (particularly stable isotope) data shows that cementation of the chalks, although related spatially to the solution features, was not caused by glacier-derived waters. The carbon isotope composition of the chalk cements is typically around −9.5 ‰, indicative of biologically active soils. Moreover, the oxygen isotope compositions of the cements, around −5 ‰, are incompatible with water δ 18 O values much below −9 to −10 ‰ (which probably precludes isotopically negative glacier-derived water), as resulting palaeo-temperatures are below zero. Taken together, the isotope data suggest chalk cementation occurred under interglacial conditions similar to the present. Dissolved calcium carbonate for cementation came from dissolution of reworked chalk in overlying MIS 12 glacial tills.

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Carbon isotope fractionation during the precipitation of calcium carbonate

Cited by 554 publications

References 11 publications

Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

Reconstruction of Low and Middle Latitude Export Productivity, 30,000 Years BP to Present: Implications for Global Carbon Reservoirs

Geochemical constraints on the origin of enigmatic cemented chalks, Norfolk, UK

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