Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater

Details Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51.1977m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 51, Issue 7, pp.1977-1984

Other

32

Scientific paper

A constant disequilibrium technique was used to determine the composition of magnesian calcite overgrowths precipitated on pure calcite seeds from artificial seawater at 5, 25 and 40°C. The amount of magnesium incorporated in the overgrowths at a given temperature is independent of the precipitation rate over a wide range of saturation states and is believed to correspond to a composition in true equilibrium with seawater. The distribution coefficient of magnesium, D Mg 2+ c , in the magnesian calcite overgrowths increases almost linearly with temperature, being 0.0121 ± 0.0013 at 5°C, 0.0172 ± 0.0022 at 25°C, and 0.0271 ± 0.0013 at 40°C. These values apply only to magnesian calcites precipitated from standard composition seawater, since a previous study has shown D Mg 2+ c to be a function of the [ Mg 2+ ]/[ Ca 2+ ] ratio in the parent solution. Results of this study are compared with values reported previously by other workers, and with the compositional distribution of naturally occurring magnesian calcite cements and ooids found in seawater. It appears that variations in temperature are not sufficient to account for the compositional variability of naturally occurring "inorganic" marine magnesian calcite cements.

Affiliated with

Also associated with

No associations

Rating

Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of temperature on the composition of magnesian calcite overgrowths precipitated from seawater will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-790396