Abstract
Two samples of the calcitic deep-sea coral Primnoa resedaeformis have been analysed for Mg/Ca ratios by micro-beam methods ( laser-ablation ICP-MS and electron microprobe). Continuous profiles of Mg/Ca have been studied with the aim of establishing the reproducibility of the variations in different parts of the coral, and therefore the potential use of Mg/Ca as a paleoceanographic or paleoclimatic tracer.
A method of spectral decomposition based on box-filter smoothing has been developed for analysing the signals. This method shows that all profiles measured contain some degree of irreproducibility. Much of this irreproducibility appears to be white-noise added by the analytical methods. The amplitude of this noise is around 15 % of the signal average for the Nd-YAG laser-ablation system at Memorial University of Newfoundland, 5–6 % for the electron microprobe at Dalhousie University, and 4–4.5 % for the ArF Excimer laser-ablation system at the Australian National University.
In the case of the LA-ICP-MS analyses, this noise may relate to uneven ablation of material from the coral and/or an uneven size distribution of particles entering the ICP-MS plasma. For the most stable system (ANU’s LA-ICP-MS), features on distance scales smaller than 150–200 µm will be obscured by the noise, and features smaller than 500 µm should be interpreted with caution.
There is some evidence that the coral itself contains compositional heterogeneity, although reproducibility is mostly limited by instrumental noise. We recommend that several analytical profiles be compared before any attempt is made to interpret Mg/Ca variations in terms of paleoceanographic changes.
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References
Adkins JF, Cheng H, Boyle EA, Druffel ERM, Edwards RL (1998) Deep-sea coral evidence for rapid change in ventilation of the deep North Atlantic 15,400 years ago. Science 280: 725–728
Andrews AH, Cordes EE, Mahoney MM, Munk K, Coale KH, Cailliet GM, Heifetz J (2002) Age, growth and radiometric age validation of a deep-sea habitat-forming gorgonian (Primnoa resedaeformis) from the Gulf of Alaska. Hydrobiologia 471: 101–110
Andrews AH, Cailliet GM, Kerr Ferry LA, Coale KH, Lundstrom C, DeVogelaere A (2005) Investigations of age and growth for three deep-sea corals from the Davidson Seamount off central California. In: Freiwald A, Roberts JM (eds) Cold-water Corals and Ecosystems. Springer, Berlin Heidelberg, pp 1021–1038
Cairns SD (1994) Scleractinia of the temperate North Pacific. Smithson Contr Zool 557: 1–150
Druffel ERM, King LL, Belastock RA, Buesseler KO (1990) Growth rate of a deep-sea coral using 210Pb and other isotopes. Geochim Cosmochim Acta 54: 1493–1500
Druffel ERM, Griffin S, Witter A, Nelson E, Suthon J, Kashagarian M, Vogel J (1995) Gerardia: Bristlecone pine of the deep sea? Geochim Cosmochim Acta 59: 5031–5036
Eggins SM, Kinsley LPJ, Shelley JM (1998) Deposition and fractionation processes during atmospheric pressure laser sampling for analysis by ICP-MS. Appl Surf Sci 127–129: 278–286
Goldstein SJ, Lea DW, Chakraborty S, Kashgarian M, Murrella T (2001) Uranium-series and radiocarbon geochronology of deep-sea corals: implications for Southern Ocean ventilation rates and the oceanic carbon cycle. Earth Planet Sci Lett 193: 167–182
Hastings DW, Russell AD, Emerson SR (1998) Foraminiferal magnesium in Globeriginoides sacculifer as a paleotemperature proxy. Paleoceanography 13: 161–169
Heikoop JM, Hickmott DD, Risk MJ, Shearer CK, Atudorei V (2002) Potential climate signals from the deep-sea gorgonian coral Primnoa resedaeformis. Hydrobiologia 471: 117–124
Horn I, Guillong M, Günter D (2001) Wavelength dependent ablation rates for metals and silicate glasses using homogenized laser-beam profiles — implications for LA-ICP-MS. Appl Surf Sci 182: 91–102
Jackson SE, Longerich HP, Dunning GR, Fryer BJ (1992) The application of laser ablation microprobe-inductively coupled plasma-mass spectrometry (LAM-ICP-MS) to in situ trace element determinations in minerals. Canad Mineral 30: 1049–1064
Lazier AV, Smith JE, Risk MJ, Schwarcz HP (1999) The skeletal structure of Desmophyllum cristagalli: the use of deep-water corals in sclerochronology. Lethaia 32: 119–130
Mucci A, Morse JW (1990) Chemistry of low-temperature abiotic calcites: experimental studies on coprecipitation, stability, and fractionation. Rev Aquat Sci 3: 217–254
Risk MJ, Heikoop JM, Snow MG, Beukens R (2002) Lifespans and growth patterns of two deep-sea corals: Primnoa resedaeformis and Desmophyllum cristagalli. Hydrobiologia 471: 125–131
Rosenthal Y, Boyle EA, Slowley N (1997) Temperature control on the incorporation of magnesium, strontium, fluorine, and cadmium into benthic foraminiferal shells from Little Bahama Bank: prospects for thermocline paleoceanography. Geochim Cosmochim Acta 61: 3633–3643
Russo RE, Mao X, Liu H, Gonzales J, Mao SS (2002) Laser ablation in analytical chemistry — a review. Talanta 57: 425–451
Sherwood O (2002) The deep sea gorgonian coral Primnoa resedaeformis as an oceanographic monitor. MSc thesis, McMaster Univ, Hamilton, Ontario, Canada
Sherwood OA, Heikoop JM, Sinclair DJ, Scott DB, Risk MJ, Shearer C, Azetsu-Scott K (2005) Skeletal Mg/Ca in Primnoa resedaeformis: relationship to temperature? In: Freiwald A, Roberts JM (eds) Cold-water Corals and Ecosystems. Springer, Berlin Heidelberg, pp 1061–1079
Sinclair DJ, Kinsley LPJ, McCulloch MT (1998) High resolution analysis of trace elements in corals by laser ablation ICP-MS. Geochim Cosmochim Acta 62: 1889–1901
Smith JE (1997) Climate reconstructions using deep-sea corals. PhD thesis, McMaster Univ, Hamilton, Ontario, Canada
Smith JE, Risk MJ, Schwarcz HP, McConnaughey TA (1997) Rapid climate change in the North Atlantic during the Younger Dryas recorded by deep-sea corals. Nature 386: 818–820
Smith JE, Brand U, Risk MJ, Schwarcz H (1999) Mid-Atlantic Ridge hydrothermal events recorded by deep-sea corals. Canad J Earth Sci 36: 511–517
Smith JE, Schwarcz HP, Risk MJ (2000) Paleotemperatures from deep-sea corals: overcoming ‘vital effects’. Palaios 15: 25–32
Stanley GD, Cairns SD (1988) Constructional azooxanthellate coral communities: an overview with implications for the fossil record. Palaios 3: 233–242
Sylvester P (2001) Principles and applications of laser ablation ICP mass spectrometry in the earth sciences. Mineral Ass Canad Short Course 29: 203–211
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Sinclair, D.J. et al. (2005). Testing the reproducibility of Mg/Ca profiles in the deep-water coral Primnoa resedaeformis: putting the proxy through its paces. In: Freiwald, A., Roberts, J.M. (eds) Cold-Water Corals and Ecosystems. Erlangen Earth Conference Series. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-27673-4_52
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