On unequal bivalve shells

Uranium in aragonitic marine bivalve shells

a r t i c l e i n f o Uranium concentrations in foraminiferal and coral skeletons track oceanic [CO 3 2 − ] and can be useful as a proxy of ocean acidification, but this pH proxy is yet to be investigated in bivalves. Two Saxidomus giganteus shells from the industrialized Puget Sound (WA, USA) and one from the more pristine Kodiak Island (AK, USA) were sampled through ontogeny for U/Ca using la...

Geochemistry of Marine Bivalve Shells: the potential for paleoenvironmental reconstruction

1 General Introduction 3 1. Bivalves as environmental proxies: An introduction. 5 2. Materials and Methods: Procedures, equipment, precision and accuracy. 31 3. Validation of LA-ICP-MS results with micromilling and SN-HR-ICP-MS. 59 4. Stable carbon and oxygen isotopes in an aragonitic bivalve (Saxidomus giganteus): assessing the reproducibility and reliability for environmental reconstruction. ...

A large metabolic carbon contribution to the dC record in marine aragonitic bivalve shells

It is well known that the incorporation of isotopically light metabolic carbon (CM) significantly affects the stable carbon isotope (dC) signal recorded in biogenic carbonates. This can obscure the record of dC of seawater dissolved inorganic carbon (dCDIC) potentially archived in the shell carbonate. To assess the CM contribution to Mercenaria mercenaria shells collected in North Carolina, USA...

A large metabolic carbon contribution to the δC record in marine aragonitic bivalve shells

David P. Gillikin , Anne Lorrain, Li Meng and Frank Dehairs 5 Dept. of Earth Science and Geography, Vassar College, Box 475, 124 Raymond Avenue, Poughkeepsie, NY 12604, USA. Tel.: (845) 437-7138; fax: (845) 437-7577; E-mail: [email protected]; Corresponding author. IRD, US CHRONOS, LASAA Centre IRD de Brest, BP 70, 29280 Plouzané, France. 10 Department of Analytical and Environmental Chemis...

A large metabolic carbon contribution to the δ13C record in marine aragonitic bivalve shells