The coprecipitation of Sr+2 with aragonite and of Ca+2 with strontianite between 90° and 100°C

Holland, Heinrich; Borcsik, M.; Muñoz, Javier López; Oxburgh, U.M.

doi:10.1016/0016-7037(63)90105-4

Cited by 80 publications

(48 citation statements)

References 11 publications

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“…Using the partition coefficient for Mg between calcite and solution at 25'C (Glover and Sippel;1967), calcites precipitated in equilibrium with sea water, or to be exact, those precipitated from water having a Mg/Ca ratio similar to that of sea water, are calculated to contain about 15 mol.% MgCO3. The Sr content of the botryoidal aragonite (ave. 9200 ppm) is also suggestive of the formation of carbonate crust in near surface sediments, because theoretical Sr content in marine aragonite is calculated to be.approximate ly 10000 ppm (Holland et al, 1963).…”

Section: Isotopic Composition Of Carbonatesmentioning

confidence: 98%

Vuggy carbonate crust formed by hydrocarbon seepage on the continental shelf of Baffin Island, northeast Canada.

Matsumoto

1990

Geochem. J.

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Vuggy carbonate crust 10 cm in thickness has been discovered associated with hydrocarbon seepage on the continental shelf of Baffin Island, northeast Canada, at a water depth of about 400 m. The car bonate crust is principally composed of high magnesian calcite (14.1 to 18.1 mol.% MgCO3) with subor dinate amounts of aragonite (---9200 ppm Sr) and calcian dolomite (51.5 to 53.2 mol.% CaCO3). Magne sian calcite occurs as microcrystalline cement, and aragonite forms botryoidal aggregates in cavities and solution pits of the crust. Dolomite occurs as isolated euhedral grains with characteristic corroded sur faces.Calcite and aragonite have the similar isotopic signatures, ranging in 813C between -26.1 and -33 .2%o PDB and in 8180 between 4.4 and 7.8%o PDB. Relative to calcite and aragonite, dolomite is enriched in 13C ( 8.9 to -11.6%o PDB 613C) and depleted in 180 (-1.2 to -1.7%o PDB PO).Combined petrographic and gochemical evidence suggests that dolomite was formed in the sulfate reduction zone prior to the formation of carbonate crust under the strong influence of 18O-depleted freshwater, which presumably was derived from the melting of glacial ice. Then high magnesian calcite precipitated to forma dense carbonate layer in the near surface sediments caused by anaerobic oxida tion of hydrate-derived 13C-depleted methane and increased alkalinity. When the sediments on the crust were winnowed and blown away by an expulsion of methane from the sea bed or a strong bottom cur rent, the crust would be exposed to a zone of aerobic methane oxidation at the sediment/water inter face. This led to dissolution of the upper surface of the crust and subsequent precipitation of botryoidal aragonite within solution vugs and cavities.

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Section: Isotopic Composition Of Carbonatesmentioning

confidence: 98%

Vuggy carbonate crust formed by hydrocarbon seepage on the continental shelf of Baffin Island, northeast Canada.

Matsumoto

1990

Geochem. J.

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“…The coprecipita tion of bivalent metal ions with clacium car bonate has been studied actively by determining the distribution coefficient of bivalent metal ions between parent solution and calcium car bonate precipitate (HOLLAND et al, 1963(HOLLAND et al, , 1964a(HOLLAND et al, , 1964bKINSMAN and HOLLAND, 1969;KINSMAN, 1969;KITANO et al, 1968KITANO et al, , 1970KITANO and TERAO, 1972;TSUSUE and HOLLAND, 1966). For the behavior of anions at the precipitation of calcium car bonate, the following observations were report ed: The amounts of fluoride and chloride ions coprecipitated with aragonite are greater than those with calcite, although their presence in a parent solution favors calcite formation (KITANO and OKUMURA, 1973;KITANO et al, 1975).…”

Section: Discussionmentioning

confidence: 99%

Uptake of phosphate ions by calcium carbonate.

1978

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(1) There are some differences in the mode of coprecipitation of phosphate ions with calcium carbonate formed from calcium bicarbonate solution between stirring and non-stirring (keeping still) the solution as follows: The amount of phosphate ions coprecipitated with calcium carbonate is larger when stirred than when kept still. In the keeping still system the amount of phosphate ions coprecipitated with calcite is approximately equal to that with aragonite, whereas in the stirring system the amount increases with increasing proportion of aragonite in calcium carbonate formed.

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“…The study on the distribution of trace metals for these minerals is important for the understanding of the geo chemical behaviors of trace metals on the earth's surface. And a number of studies have been carried out on the measurement of the distribu tion coefficients of trace metals between solu tion and carbonate precipitate; Sr (HOLLAND et al, 1963(HOLLAND et al, , 1964B ODINE et al, 1965;KINSMAN and HOLLAND, 1969;, KATZ et al, 1972, Zn (TSUSUE and HOLLAND, 1966;CROCKET and WINCHESTER, 1966;KITANO et al, 1968), Cu (KITANO et al, 1968), U02 , Mn (BODINE et al, 1965;RAISWELL and BRIMBLECOMBE, 1977), Ba , Mg (KITANO and KANA MORI) 1966;KATZ, 1973;KITANO et al, 1976), Cd (KITANO et al, 1978). Magnesium carbonate in skeletal calcite is present as a solid solution between calcite and magnesite or dolomite (CRAVE, 1952;GOLDSMITH et al, 1955;KITANO and FURUTSU, 1959;KITANO and KANAMORI, 1966).…”

Section: Introductionmentioning

confidence: 99%

Magnesian calcite synthesis from calcium bicarbonate solution containing magnesium and barium ions.

1979

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The coprecipitation of Sr+2 with aragonite and of Ca+2 with strontianite between 90° and 100°C

Cited by 80 publications

References 11 publications

Vuggy carbonate crust formed by hydrocarbon seepage on the continental shelf of Baffin Island, northeast Canada.

Vuggy carbonate crust formed by hydrocarbon seepage on the continental shelf of Baffin Island, northeast Canada.

Uptake of phosphate ions by calcium carbonate.

Magnesian calcite synthesis from calcium bicarbonate solution containing magnesium and barium ions.

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