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DOI | 10.1002/jqs.3133 |
Itrax mu-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes | |
Peti, Leonie1; Gadd, Patricia S.2; Hopkins, Jenni L.3; Augustinus, Paul C.1 | |
发表日期 | 2019 |
ISSN | 0267-8179 |
EISSN | 1099-1417 |
英文摘要 | Itrax micro X-ray fluorescence (mu-XRF) core scanning is a non-destructive, rapid approach to measuring elemental concentrations and their variability in sediment cores. As such, it records elemental signatures of tephra layers, which serve as correlation tie points and chronological markers for these sedimentary archives of past climatic changes. The traditional tephra identification approach using electron microprobe-based geochemical fingerprinting of glass shards is a slow and invasive process, whilst mu-XRF scanning of rhyolite tephra in sediment cores from Auckland (New Zealand) could provide a faster, non-invasive approach to aid the recognition of tephra layers. This study highlights the potential and pitfalls in this novel approach: changes in most scanning parameters, and the use of two different Itrax core scanners, still led to similar chemical characterizations of the tephra layers. Changes in other scanning parameters have a biasing influence on the chemical characterization of the tephra, which would lead to misidentification of unknown layers. We demonstrate that mu-XRF core scanning provides a faster and non-invasive approach to correlation of sediment sequences using chemically distinct, visually pure tephra layers if a strict scanning protocol is followed. Nevertheless, an extensive database of mu-XRF-scanned rhyolite tephra is required for recognition of unknown tephra units using this approach. |
WOS研究方向 | Physical Geography ; Geology |
来源期刊 | JOURNAL OF QUATERNARY SCIENCE
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/100691 |
作者单位 | 1.Univ Auckland, Sch Environm, Auckland, New Zealand; 2.Australian Nucl Sci & Technol Org, Sydney, NSW, Australia; 3.Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington, New Zealand |
推荐引用方式 GB/T 7714 | Peti, Leonie,Gadd, Patricia S.,Hopkins, Jenni L.,et al. Itrax mu-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes[J],2019. |
APA | Peti, Leonie,Gadd, Patricia S.,Hopkins, Jenni L.,&Augustinus, Paul C..(2019).Itrax mu-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes.JOURNAL OF QUATERNARY SCIENCE. |
MLA | Peti, Leonie,et al."Itrax mu-XRF core scanning for rapid tephrostratigraphic analysis: a case study from the Auckland Volcanic Field maar lakes".JOURNAL OF QUATERNARY SCIENCE (2019). |
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