Experiences with XRF-Scanning of Long Sediment Records
Experiences with XRF-Scanning of Long Sediment Records
复制标题
对长沉积物记录进行 XRF 扫描的经验
DOI:
10.1007/978-94-017-9849-5_13
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Enters D.
中科院分区:
文献类型:
--
作者:
Ohlendorf;Wennrich V;Enters D.
Lacustrine sediment sequences of more than 100 m in length obtained in the framework of two deep drilling projects (PASADO and El’gygytgyn) were analysed with ITRAX XRF-core scanners. Core length and the long total scan time of 300–8000 h for these records made it necessary to consider downcore lithological changes and tube ageing. To account for these, two different approaches were realised for the acquisition of element data by XRF-scanning. Additionally, X-ray tube ageing was documented by regular measurements of a standard reference glass after each core run. The data obtained suggest that a normalisation of XRF raw-data is advisable for several reasons. (1) To level out effects of the observed long-term decrease in primary tube power that lead to lower count rates and thus lower element intensities. (2) To level out shifts in element profiles between sections that were measured with different X-ray tube current settings. From the tested normalisation procedures a division of element raw intensities by the intensity of coherent radiation (coh) yielded the best results for elements with mid to high atomic numbers. However, elements with low atomic numbers are less affected by a lowering of count rates related to tube ageing, and thus, the coh correction might over-compensate for this for these elements. Thus, for light elements it is advantageous to correct for the apparent energy loss by calculating ratios of elements with comparable atomic numbers (e.g. Si/Ti).
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
J. Brigham‐Grette;M. Melles
通讯作者:
M. Melles
影响因子:
4.3
作者:
M. Sauerbrey;O. Juschus;A. Gebhardt;V. Wennrich;N. Nowaczyk;M. Melles
通讯作者:
M. Sauerbrey;O. Juschus;A. Gebhardt;V. Wennrich;N. Nowaczyk;M. Melles
DOI:
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发表时间:
2000
期刊:
影响因子:
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作者:
P. Layer
通讯作者:
P. Layer
DOI:
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发表时间:
2006
期刊:
影响因子:
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作者:
B. Zolitschka;F. Schäbitz;A. Lücke;H. Corbella;B. Ercolano;M. Fey;T. Haberzettl;Stephanie Janssen;N. Maidana;C. Mayr;C. Ohlendorf;G. Oliva;M. Paez;G. Schleser;J. Soto;P. Tiberi;M. Wille
通讯作者:
M. Wille
DOI:
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发表时间:
2012
期刊:
影响因子:
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作者:
G. Fedorov;M. Nolan;J. Brigham‐Grette;D. Bolshiyanov;G. Schwamborn;O. Juschus
通讯作者:
O. Juschus