Uptake of sodium and potassium by calcite

Ishikawa, Masamichi; Ichikuni, Masami

doi:10.1016/0009-2541(84)90010-x

Cited by 124 publications

(92 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other elements presented in our solution potentially could affect REE partitioning by the distortion of the calcite structure in our study, as well as in the work of Zhong and Mucci, who used artificial seawater doped with major and minor seawater elements, including Sr and Mg [8,36]. Our growth medium contained Li in a concentration an order of magnitude lower than the concentration of Na; both elements are incompatible into calcite (K~10 −3 ), especially in comparison to REE [37,38]. Therefore, it is unlikely that Li contributed significantly to REE partitioning.…”

Section: Comparison With Other Studiesmentioning

confidence: 73%

“…Therefore, it is unlikely that Li contributed significantly to REE partitioning. Moreover, the correlation of Li and Na partitioning with salinity suggests that those elements incorporate into calcite interstitially, i.e., not to the Ca site [37,38]. Although those facts do not rule out the potential effects of Na, Li, Mg, and Sr on the incorporation of REE into calcite, the amount of data is insufficient for making conclusions on this subject, especially because the fluid REE concentration dropped rapidly during our experiments, which precludes developing relationships between REE and other elements in calcite.…”

Section: Comparison With Other Studiesmentioning

confidence: 99%

See 1 more Smart Citation

REE Incorporation into Calcite Individual Crystals as One Time Spike Addition

2017

View full text Add to dashboard Cite

Experiments on the incorporation of trace elements into calcite were performed, and rare earth elements (REE) were used to mark the growth zones of individual crystals. Experiments were conducted at different pH (7.7 to 8.8) and temperatures (2 • C to 24.6 • C) in NH 4 Cl + CaCl 2 solutions, where REE were rapidly consumed by growing calcite. LA-ICP-MS line-scans yielded the distribution of (REE/Ca) calcite within individual crystals in a manner consistent with the addition of REE into fluid. A sharp decrease of (REE/Ca) calcite toward the crystal edge suggests the fast depletion of (REE/Ca) fluid due to strong REE consumption by growing calcite. An attempt was made to estimate the lower limit of the partition coefficients between calcite and fluid using selected REE/Ca data within individual calcite crystals and the amount of REE added into fluid.

show abstract

Section: Comparison With Other Studiesmentioning

confidence: 73%

Section: Comparison With Other Studiesmentioning

confidence: 99%

REE Incorporation into Calcite Individual Crystals as One Time Spike Addition

2017

View full text Add to dashboard Cite

show abstract

“…A similar influence of salinity was also highlighted on Na/Ca calcite and might be general for all alkali metals (Ishikawa and Ichikuni, 1984;Marriott et al, 2004b). Indeed, alkali metals are known to be incorporated in an interstitial location in calcite, while they are incorporated in the crystal structure of aragonite in substitution of Ca, leading to formation of Li 2 CO 3 crystals (Okumura and Kitano, 1986).…”

Section: Salinity and Dissolved Lithium Concentrationmentioning

confidence: 84%

Li/Ca enrichments in great scallop shells (Pecten maximus) and their relationship with phytoplankton blooms

Thébault

Chauvaud

2013

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

To cite this version:Julien Thébault, Laurent Chauvaud. Li/Ca enrichments in great scallop shells (Pecten maximus) and their relationship with phytoplankton blooms. Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier, 2012, 373, pp.108-122. <10.1016/j.palaeo.2011 AbstractPhytoplankton dynamics in coastal oceans is a major component of the global biogeochemical carbon cycle, and is currently affected by global change through modifications in levels of primary productivity and composition of phytoplankton communities. Despite many attempts, no straightforward geochemical proxy has been found yet in marine biogenic carbonates for reconstruction of past phytoplankton dynamics with high temporal resolution. Here, we report on subweekly variations of lithium-to-calcium ratios (Li/Ca shell ) along the axis of maximum growth of great scallop shells ( Comparison of these results with shell growth measurements (increment width) and environmental parameters suggests (i) that shell calcification rate is likely the main factor controlling incorporation of Li in Pecten maximus shell calcite, (ii) that seawater temperature has only a weak positive influence on Li/Ca shell of this species over the range 8-18°C, and (iii) that during diatom blooms, additional amounts of Li may be trapped in the shell following dissolution of Li-rich frustules of edible species in the digestive tract of scallops, being responsible for Li/Ca shell peaks. Therefore, we suggest that Li/Ca shell ratio may be a novel proxy for timing and magnitude of diatom blooms in coastal ecosystems. Analysis of ancient shells may thus provide useful information on past phytoplankton dynamics and on the importance of recent shifts observed from diatoms to non-siliceous phytoplankton in coastal areas affected by anthropogenic activities.

show abstract

“…Precipitation rates, ionic strength of the medium and presence of organic compounds are also known to affect partition coefficients. All values are in parts per million (ppm) and based on data in Kitano et al (1975), Ishikawa and Ichikuni (1984), Rimstidt et al (1998) acidification. Most of the initial observations of chamber formation and calcification in planktonic foraminifera were published during the early period of planktonic foraminifera culturing (e.g.…”

Section: Introductionmentioning

confidence: 99%

Biomineralization in perforate foraminifera

Nooijer

Spero

Erez

et al. 2014

Earth-Science Reviews

210

190

View full text Add to dashboard Cite

a b s t r a c t a r t i c l e i n f oIn this paper, we review the current understanding of biomineralization in perforate foraminifera. Ideas on the mechanisms responsible for the flux of Ca 2+ and inorganic carbon from seawater into the test were originally based on light and electron microscopic observations of calcifying foraminifera. From the 1980s onward, tracer experiments, fluorescent microscopy and high-resolution test geochemical analysis have added to existing calcification models. Despite recent insights, no general consensus on the physiological basis of foraminiferal biomineralization exists. Current models include seawater vacuolization, transmembrane ion transport, involvement of organic matrices and/or pH regulation, although the magnitude of these controls remain to be quantified. Disagreement between currently available models may be caused by the use of different foraminiferal species as subject for biomineralization experiments and/or lack of a more systematic approach to study (dis)similarities between taxa. In order to understand foraminiferal controls on element incorporation and isotope fractionation, and thereby improve the value of foraminifera as paleoceanographic proxies, it is necessary to identify key processes in foraminiferal biomineralization and formulate hypotheses regarding the involved physiological pathways to provide directions for future research.

show abstract

Uptake of sodium and potassium by calcite

Cited by 124 publications

References 15 publications

REE Incorporation into Calcite Individual Crystals as One Time Spike Addition

REE Incorporation into Calcite Individual Crystals as One Time Spike Addition

Li/Ca enrichments in great scallop shells (Pecten maximus) and their relationship with phytoplankton blooms

Biomineralization in perforate foraminifera

Contact Info

Product

Resources

About