Strontium behavior in the aragonite-calcite transformation: An experimental study at 40–98°C

Katz, Amitai; Sass, Eytan; Starinsky, Abraham; Holland, Heinrich

doi:10.1016/0016-7037(72)90037-3

Cited by 263 publications

(134 citation statements)

References 17 publications

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“…At the Sr 2+ concentration plateau: 2 × lO~3 > k plateau Using an average value of 5 × 10" 2 mol/mol for the (Sr 2+ /Ca 2+ ) plateau , yields a value of k sr < 0.04. This number agrees very well with the results of Katz et al (1972) and Baker et al (1982). In the latter paper, we predicted a value of k sr 0.04 at 5°C and 0.08 mM Sr 2+ .…”

Section: Core-section (Interval In Cm)supporting

confidence: 93%

Pore-Water Chemistry of Carbonate-Rich Sediments, Lord Howe Rise, Southwest Pacific Ocean

Baker¹

1986

Initial Reports of the Deep Sea Drilling Project

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About 200 pore-water samples were recovered and analyzed from eight sites of DSDP Leg 90. At all sites on the carbonate-rich Lord Howe Rise, Ca 2+ concentrations increase and Nig 2 " 1 " concentrations decrease with increasing sub-bottom depth. The value of ΔCa 2+ /ΔMg 2+ averages -0.45 mol/mol at these sites, an unusually small negative value in comparison with sites on basaltic crust. This supports the argument that the crust of the Lord Howe Rise is siliceous. Li + concentrations increase and K + concentrations decrease with depth. Both of these constituents are affected by reactions within the sediment column. Microbial sulfate reduction occurs to a small extent at all sites. In the upper 200 m of Site 594 on the south side of the Chatham Rise, sulfate reduction and alkalinity production are more pronounced.Carbonate recrystallization is indicated by large increases in Sr 2+ concentrations with depth at all sites. The exact value of the Sr 2+ maximum at each site is determined by equilibrium with respect to celestite (SrSO 4 ). The greater the degree of microbial sulfate reduction, the higher is the pore water Sr 2+ concentration. The diffusive flux of Sr 2 out of the pore waters is consistent with an initial rate of carbonate recrystallization of 10%/m.y. This recrystallization must alter the isotopic and trace elemental compositions of some carbonate components.

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Section: Core-section (Interval In Cm)supporting

confidence: 93%

Pore-Water Chemistry of Carbonate-Rich Sediments, Lord Howe Rise, Southwest Pacific Ocean

Baker¹

1986

Initial Reports of the Deep Sea Drilling Project

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“…The distribution coefficient of Sr in calcite is only slightly affected by temperature (e.g., Katz et al, 1972) and hence the low Sr concentrations (35-1690 ppm; Fig. 23) of the low δ 18 θ carbonates suggest decreasing Sr/Ca of the fluids.…”

Section: Carbonate δmentioning

confidence: 99%

Alteration of Upper Ocean Crust in a Ridge-Flank Hydrothermal Upflow Zone: Mineral, Chemical, and Isotopic Constraints from Hole 896A

Teagle¹,

Alt²,

Bach³

et al. 1996

Proceedings of the Ocean Drilling Program, 148 Scientific Results

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Hole 896A penetrates into the upper volcanic section of a ridge-flank hydrothermal upflow zone. Analyses of the secondary mineralogy and chemistry, whole-rock geochemistry, and oxygen, carbon, and strontium isotope ratios of whole rocks and secondary minerals were conducted to constrain the chemical and thermal evolution of hydrothermal alteration and its effects on the upper crust at Site 896.Celadonite ± Fe-oxyhydroxides are the earliest secondary minerals and formed at low temperatures. N -11). A second generation of carbonates formed at higher temperatures (47°-67°C), from seawater-derived fluids with lowered Mg/Ca and Sr/Ca ratios and elevated Fe, and Mn concentrations. Trace-element chemistry of the high-temperature carbonates in general, and the lower 87 Sr/ 86 Sr of rare high-temperature aragonites (0.7079-0.7084) suggest more restricted circulation of seawater and reducing conditions. The higher temperature carbonates formed at temperatures consistent with the present-day thermal regime at Site 896; a ridge-flank hydrothermal upflow zone with basement temperatures greater than 50°C.All rocks from Hole 896A have interacted with seawater at low temperatures, and samples commonly record the integrated legacy of superimposed alteration processes. The most intense chemical changes have occurred within hyaloclastite and fragmentation breccias that comprise at least 5% of the uppermost oceanic crust at Site 896.The sequence of alteration processes present in Hole 896A is broadly similar to that recorded in the upper crust (above 300 m sub-basement) of Hole 504B, which is located approximately 1 km to the northwest, in a zone of average regional heat flow. The main differences between the material from Holes 896A and 504B is the greater abundance of carbonates, and hyaloclastite and fragmentation breccias, and the common occurrence of thick ( l cm) saponite veins in the new hole.

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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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Strontium behavior in the aragonite-calcite transformation: An experimental study at 40–98°C

Cited by 263 publications

References 17 publications

Pore-Water Chemistry of Carbonate-Rich Sediments, Lord Howe Rise, Southwest Pacific Ocean

Pore-Water Chemistry of Carbonate-Rich Sediments, Lord Howe Rise, Southwest Pacific Ocean

Alteration of Upper Ocean Crust in a Ridge-Flank Hydrothermal Upflow Zone: Mineral, Chemical, and Isotopic Constraints from Hole 896A

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

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