SIMS sputtering rates in biogenic aragonite: implications for culture calibration studies for palaeoenvironmental reconstruction
SIMS sputtering rates in biogenic aragonite: implications for culture calibration studies for palaeoenvironmental reconstruction
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DOI：
10.1002/sia.5297
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发表时间：
2013-09-01
影响因子：
1.7
通讯作者：
Finch, Adrian A.
中科院分区：
文献类型：
--
作者：
Allison, Nicola;Chambers, David;Finch, Adrian A.
我们使用扫描白色光干涉法，以查看在二次离子质谱（西姆斯）分析的碳酸钙骨架的文石珊瑚产生的陨石坑。测定δ O-18、δ C-13和δ B-11分析。对于δ O-16（-）初级射束，溅射速率类似于6 μ m（3）nA（-1）min（-1），并且范围从类似于12 μ m（3）nA（-1）min（-1）（对于δ O-18分析）到类似于19 μ m（3）nA（-1）（对于δ C-13分析）。溅射产率（原子溅射/撞击初级离子）的范围从1.3到1.4的δ O-16（-）初级束和从2.5到4.5使用Cs+初级束。使用地球科学应用中通常使用的仪器条件，有用的离子产额（检测到的离子/溅射原子）对于B、Mg、Ca、Sr、Ba和C为10（-4），对于O为10（-2）。δ C-13分析）至36 μ m（δ B-11分析）之间，火山口深度范围从3 μ m（δ O-18分析）至>20 μ m（δ B-11分析）。这些尺寸对于一系列生物成因碳酸盐和西姆斯分析中的增生率是重要的，通常根据所分析的生物体和结构，在几天到几个月的时间内沉积碳酸盐样品。在培养校准研究中，准确测定分析体积的时间分辨率至关重要，以确保整个体积反映培养条件，并且不包括在将生物体引入培养系统之前沉积的碳酸盐。版权所有（C）2013约翰威利父子有限公司
We used scanning white light interferometry to view the craters produced during secondary ion mass spectrometry (SIMS) analysis of the CaCO3 skeleton of an aragonitic coral. delta O-18, delta C-13 and delta B-11 analyses were determined. Sputtering rates were similar to 6 mu m(3)nA(-1)min(-1) for a delta O-16(-) primary beam and ranged from similar to 12 mu m(3)nA(-1)min(-1) (for delta O-18 analyses) to similar to 19 mu m(3)nA(-1) (for delta C-13 analyses) using a Cs+ primary beam. Sputter yields (atoms sputtered/impinging primary ions) ranged from 1.3 to 1.4 for a delta O-16(-) primary beam and from 2.5 to 4.5 using a Cs+ primary beam. Useful ion yields (ions detected/atoms sputtered), using instrument conditions typically used in geoscience applications, were of the order of 10(-4) for B, Mg, Ca, Sr, Ba and C and 10(-2) for O. delta C-13 analyses) to similar to 36 mu m (delta B-11 analyses) and crater depths range from 3 mu m (delta O-18 analyses) to >20 mu m (delta B-11 analyses). These dimensions are significant in relation to accretion rates in a range of biogenic carbonates and SIMS analyses typically sample carbonate deposited over time periods of days to months depending on the organism and structure analysed. In culture calibration studies, accurate determination of the temporal resolution of the analysed volume is crucial to ensure that the entire volume reflects the culture conditions and does not include carbonate deposited prior to introduction of the organism to the culture system. Copyright (C) 2013 John Wiley & Sons, Ltd.