Salinity effects on the Mg/Ca and Sr/Ca in starfish skeletons and the echinoderm relevance for paleoenvironmental reconstructions

被引：43

作者：

Borremans, Catherine ^{[1
]}

Hermans, Julie ^{[1
,2
]}

Baillon, Sandrine

Andre, Luc ^{[3
]}

Dubois, Philippe ^{[1
]}

机构：

[1] Univ Libre Bruxelles, Biol Marine Lab, B-1050 Brussels, Belgium

[2] Inst Royal Sci Nat Belgique, Dept Invertebres, B-1000 Brussels, Belgium

[3] Musee Royal Afr Cent, Sect Mineral Petrog & Geochim, B-3080 Tervuren, Belgium

来源：

GEOLOGY | 2009年 / 37卷 / 04期

关键词：

AMORPHOUS CALCIUM-CARBONATE; ARAGONITIC BIVALVE SHELLS; IN-VITRO; MAGNESIUM; SEA; RATIOS; BIOMINERALIZATION; TEMPERATURE; STRONTIUM; CALCIFICATION;

D O I：

10.1130/G25411A.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Skeletal Mg/Ca ratios of well-preserved fossil echinoderms have been used to reconstruct past Mg/Ca ratio in seawater up to the Phanerozoic, taking into account the known temperature effect on this ratio. This study investigates the effects of salinity and growth rate on Mg/Ca and Sr/Ca ratios in starfish calcite skeletons grown in experimental conditions. Both ratios are not related to growth rate: on the contrary, both are positively related to salinity. This effect induces an error on the reconstructed Mg/Ca ratio in seawater that may reach 46%. An intriguing inverse relation between skeletal Sr/Ca ratio and temperature was recorded. The salinity effects are presumably due to physiological regulation processes.

引用

页码：351 / 354

页数：4

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