Daily growth and tidal rhythms in Miocene and modern giant clams revealed via ultra-high resolution LA-ICPMS analysis — A novel methodological approach towards improved sclerochemistry

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• 作者：Viola Warter ; ^{viola.warter@rhul.ac.uk} ; Wolfgang Mü ; ller ^{w.muller@es.rhul.ac.uk}
• 关键词：Tridacna spp. ; Miocene ; Daily cycles ; Tidal periodicity ; Ultra-high resolution LA-ICPMS ; Image processing
• 刊名：Palaeogeography, Palaeoclimatology, Palaeoecology
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：465
• 期：part_PB
• 页码：362-375
• 全文大小：3585 K
• 卷排序：465

文摘

A novel methodological approach for ultra-high resolution LA-ICPMS analysis to resolve daily growth in giant clams. < 10 µm daily variability in B/Ca, Mg/Ca, Sr/Ca and Ba/Ca is resolved in Miocene and modern Tridacna shells. Longer-term LA-ICPMS records reveal Miocene fortnightly (tidal) and seasonal periodicities. Image processing analysis indicates a coupling between the geochemical composition and the incremental growth pattern. LA-ICPMS analysis facilitates rapid acquisition of longer-term (deep-time) palaeoenvironmental records at daily resolution.