13C
and 18O
Isotopic Ratios Of CaCO3 using a Thermoquest Finnigan GasBench II Delta Plus
XL Continuous Flow Isotope Ratio Mass Spectrometer with Application to Devils
Hole Core DH-11 CalciteU.S. Geological Survey, 431 National Center, Reston, VA 20192
U.S. Geological Survey Open-File Report 01-257
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| Abstract | |
| Introduction | |
| Methodology and Equipment | |
| Testing of Method by Application to Devils Hole Calcite | |
| Summary | |
| Acknowledgments | |
| References Cited |
| Figure 1. | Schematic of GasBench II and Mass Spectrometer used for this study. | |
| Figure 2. | Precision and accuracy of standard reference materials using GasBench II at 65oC. | |
| Figure 3. | Precision and accuracy of standard reference material using GasBench II at 26oC. | |
| Figure 4. | Stable carbon and oxygen ratio data profiles obtained by the GasBench II method for the re-sampled DH-11 core material compared to original DH-11 analysis by the classical method. | |
| Figure 5. | Stable carbon and oxygen ratio data profiles obtained by the GasBench II method for the re-sampled DH-11 core material, with appropriate sampling depth correction applied, compared to the original DH-11 analysis by the classical method. |
| Appendix A: | Complete Step by Step Procedure | |
| Appendix B: | ISODAT "CACO3" Method | |
| Appendix C: | Data Tabulation |
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