Details
| Original language | English |
|---|---|
| Pages (from-to) | 32-42 |
| Number of pages | 11 |
| Journal | Chemical geology |
| Volume | 392 |
| Early online date | 20 Nov 2014 |
| Publication status | Published - 21 Jan 2015 |
Abstract
In this study we introduce a new in situ technique which allows the determination of the boron isotopic composition and B/Ca ratios simultaneously at the nanogram level using a combination of optical emission spectroscopy and multiple ion counting MC ICP-MS with laser ablation. This technique offers a new application in the paleo-field of oceanography and climatology since small samples like e.g. single foraminiferal shells can be analyzed. The simultaneous determination of the boron isotopic composition and B/Ca ratios provides two independent proxies which allow the reconstruction of the full carbonate system. To test the new technique we performed measurements on the cultured, benthic foraminifer Amphistegina lessonii. Our results yielded an average boron isotopic composition δ11B=18.0±0.83‰ (SD) with an average internal precision of 0.52‰ (RSE). The boron concentration was 53±7μg/g (SD). These results agree with the range reported in the literature. The reconstructed mean pH value is in excellent agreement with the measured pH of the seawater in which the foraminifers grew. The analysis of a foraminifer consumed approximately 1200. ng calcium carbonate containing ca. 0.06. ng boron. Compared to bulk analytical methods, this new technique requires less material and reduces the time for sample preparation.
Keywords
- B/Ca, Boron isotopes, Corals, Foraminifers, Laser ablation MC ICP-MS
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Sustainable Development Goals
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In: Chemical geology, Vol. 392, 21.01.2015, p. 32-42.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Simultaneous determination of δ11B and B/Ca ratio in marine biogenic carbonates at nanogram level
AU - Kaczmarek, Karina
AU - Horn, Ingo
AU - Nehrke, Gernot
AU - Bijma, Jelle
N1 - Funding Information: We are grateful to Marlene Wall, Jan Fietzke, and Max Janse for providing the coral sample and the foraminifers. We thank Sambuddha Misra for the B analysis of the culture media and Keyence for the provision of the microscopic instruments. This project was financially supported by the DFG BI 432/7-1 .
PY - 2015/1/21
Y1 - 2015/1/21
N2 - In this study we introduce a new in situ technique which allows the determination of the boron isotopic composition and B/Ca ratios simultaneously at the nanogram level using a combination of optical emission spectroscopy and multiple ion counting MC ICP-MS with laser ablation. This technique offers a new application in the paleo-field of oceanography and climatology since small samples like e.g. single foraminiferal shells can be analyzed. The simultaneous determination of the boron isotopic composition and B/Ca ratios provides two independent proxies which allow the reconstruction of the full carbonate system. To test the new technique we performed measurements on the cultured, benthic foraminifer Amphistegina lessonii. Our results yielded an average boron isotopic composition δ11B=18.0±0.83‰ (SD) with an average internal precision of 0.52‰ (RSE). The boron concentration was 53±7μg/g (SD). These results agree with the range reported in the literature. The reconstructed mean pH value is in excellent agreement with the measured pH of the seawater in which the foraminifers grew. The analysis of a foraminifer consumed approximately 1200. ng calcium carbonate containing ca. 0.06. ng boron. Compared to bulk analytical methods, this new technique requires less material and reduces the time for sample preparation.
AB - In this study we introduce a new in situ technique which allows the determination of the boron isotopic composition and B/Ca ratios simultaneously at the nanogram level using a combination of optical emission spectroscopy and multiple ion counting MC ICP-MS with laser ablation. This technique offers a new application in the paleo-field of oceanography and climatology since small samples like e.g. single foraminiferal shells can be analyzed. The simultaneous determination of the boron isotopic composition and B/Ca ratios provides two independent proxies which allow the reconstruction of the full carbonate system. To test the new technique we performed measurements on the cultured, benthic foraminifer Amphistegina lessonii. Our results yielded an average boron isotopic composition δ11B=18.0±0.83‰ (SD) with an average internal precision of 0.52‰ (RSE). The boron concentration was 53±7μg/g (SD). These results agree with the range reported in the literature. The reconstructed mean pH value is in excellent agreement with the measured pH of the seawater in which the foraminifers grew. The analysis of a foraminifer consumed approximately 1200. ng calcium carbonate containing ca. 0.06. ng boron. Compared to bulk analytical methods, this new technique requires less material and reduces the time for sample preparation.
KW - B/Ca
KW - Boron isotopes
KW - Corals
KW - Foraminifers
KW - Laser ablation MC ICP-MS
UR - http://www.scopus.com/inward/record.url?scp=84913535807&partnerID=8YFLogxK
U2 - 10.1016/j.chemgeo.2014.11.011
DO - 10.1016/j.chemgeo.2014.11.011
M3 - Article
AN - SCOPUS:84913535807
VL - 392
SP - 32
EP - 42
JO - Chemical geology
JF - Chemical geology
SN - 0009-2541
ER -