@article{PAR00007493, title = {{S}trong kinetic effects on {S}r/{C}a ratios in the calcitic bivalve}, author = {{L}orrain, {A}nne and {G}illikin, {D}.{P}. and {P}aulet, {Y}.{M}. and {C}hauvaud, {L}. and {L}e {M}ercier, {A}. and {N}avez, {J}. and {A}ndr{\'e}, {L}.}, editor = {}, language = {{ENG}}, abstract = {{A}lthough {S}r/{C}a ratios in abiogenic calcite are strongly controlled by precipitation rates, such a kinetic effect has never been demonstrated in calcitic bivalve shells. {T}herefore, we report {S}r/{C}a ratios together with daily growth rates in the calcitic shells of 4 individuals of the bivalve {P}ecten maximus (age class {I}). {R}atios of {S}r/{C}a were found to be variable among individuals that grew at the same location, illustrating that vital effects dominate over environmental controls. {A}lthough daily growth rate was correlated with shell {S}r/{C}a ratios, it explained only half of the {S}r/{C}a variations. {H}owever, daily shell surface area increment, an estimation of the total quantity of carbonate precipitated for a given time, explained 74% of the {S}r/{C}a variability in the shells of {P}. maximus. {T}his proves, for the first time in a calcitic bivalve, that shell {S}r/{C}a partitioning is mainly controlled by kinetic effects. {T}he {S}r/{C}a ratio should therefore be tested as a potential proxy of calcification rate in modern or fossil calcitic biocarbonates.}, keywords = {}, booktitle = {}, journal = {{G}eology}, volume = {33}, numero = {12}, pages = {965--968}, year = {2005}, URL = {https://www.documentation.ird.fr/hor/{PAR}00007493}, }