Intratest Variations in Trace Element Composition of Amphistegina lessonii Using Femtosecond‐Laser Ablation‐ICP‐Mass Spectrometry: A Field Study From Akajima, Okinawa Prefecture, Japan
| Autor: | Klaus Peter Jochum, Pratul Kumar Saraswati, Ulrike Weis, Sonal Khanolkar, Asmita Singh, Brigitte Stoll, Gerald H. Haug, Ralf Schiebel |
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| Přispěvatelé: | Schiebel, Ralf, 1 Department of Climate Geochemistry Max Planck Institute for Chemistry Mainz Germany, Singh, Asmita, 2 Department of Earth Sciences Indian Institute of Technology Bombay Mumbai India, Saraswati, Pratul Kumar, Jochum, Klaus Peter, Weis, Ulrike, Stoll, Brigitte, Haug, Gerald H. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Geochemistry, Geophysics, Geosystems, 22 (3) |
| ISSN: | 1525-2027 |
| DOI: | 10.23689/fidgeo-4274 |
| Popis: | Amphistegina are common larger benthic foraminifer in coral reefs, with a nearly circumtropical distribution, and are major contributors to the CaCO3 budget of shallow marine environments. The family Amphisteginidae is dominant in Cenozoic carbonates. However, its potential as a proxy for paleoclimate reconstruction has not been completely explored. The intratest variability in trace elements of Amphistegina lessonii has been investigated using femtosecond‐laser ablation‐inductively coupled plasma‐mass spectrometry (fs‐LA‐ICP‐MS). We collected and analyzed adult specimens of A. lessonii in September 2003, November 2003, January 2004, and March 2004, from ∼2 m water depth in the coral reefs of Akajima, Okinawa, Japan. Tests of A. lessonii from these four collections were analyzed for Mg/Ca of the septa to observe Test Size‐Lifespan relationships. The lifespan of a specimen of A. lessonii of 1,200 µm in diameter is estimated at ∼3 and ∼2 months for specimens 900 µm in size. Over the estimated lifespans, Mg/Ca of individual specimens of A. lessonii is highly variable and displays co‐variation with temperature and tidal heights. Future projects may apply and further test this approach for the reconstruction of the tropical shallow marine paleoenvironments. Geochemistry, Geophysics, Geosystems, 22 (3) ISSN:1525-2027 |
| Databáze: | OpenAIRE |
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