Testing the reproducibility of Mg/Ca profiles in the deep-water coral Primnoa resedaeformis: putting the proxy through its paces

Optical Observations and Geochemical Data in Deep-Sea Hexa- and Octo-Coralla Specimens

“…These values are in agreement with previously reported data in octocorallian corals [18,[63][64][65][66]. The Sr/Ca ratios show a varition between 2.88 and 3.18 mmol/mol for SIMS measurements and between 3.10 and 3.26 mmol/mol for bulk analyses.…”

A numerical model of trace-element coprecipitation in a physicochemical calcification system: Application to coral biomineralization and trace-element ‘vital effects’

“…As defects would increase with increasing calcification rate, Mg 2+ and calcification rate would be positively correlated. An alternative explanation could be that Mg 2+ is controlled by some crystallographic factor (see discussion in Sinclair et al, 2005), or that Mg 2+ is associated with a periodically cycling organic phase (as suggested by Meibom et al, 2004; although, this raises further questions about its strong anti-correlation with U-see Sinclair, 2005).…”

Reproducibility of trace element profiles in a specimen of the deep-water bamboo coral Keratoisis sp.

“…It allows data to be collected at subdecadal resolution and analysis is rapid, facilitating replication of geochemical profiles for reproducibility testing. Sinclair et al (2005) presented analytical and numerical strategies for quantifying optimal analytical resolution and testing the fidelity of deep-coral specimens. That study uncovered evidence for non-reproducible variations in Mg/Ca (a temperature proxy) in the deep-sea gorgonian Primnoa resedaeformis which potentially constrains the precision with which temperature can be reconstructed.…”