10.1594/PANGAEA.872654
De Vleeschouwer, David
David
De Vleeschouwer
0000-0002-3323-807X
Dunlea, Ann G
Ann G
Dunlea
0000-0003-1251-1441
Auer, Gerald
Gerald
Auer
0000-0002-2574-0027
Anderson, Chloe H
Chloe H
Anderson
0000-0003-1141-3559
Brumsack, Hans-Jürgen
Hans-Jürgen
Brumsack
0000-0002-5549-5018
de Loach, Aaron
Aaron
de Loach
0000-0002-8901-4278
Gurnis, Michael
Michael
Gurnis
Huh, Youngsook
Youngsook
Huh
Ishiwa, Takeshige
Takeshige
Ishiwa
0000-0002-7566-4421
Jang, Kwangchul
Kwangchul
Jang
Kominz, Michelle A
Michelle A
Kominz
0000-0002-8640-2742
März, Christian
Christian
März
Schnetger, Bernhard
Bernhard
Schnetger
0000-0003-1638-3977
Murray, Richard W
Richard W
Murray
Pälike, Heiko
Heiko
Pälike
0000-0003-3386-0923
Expedition 356 shipboard scientists
A MATLAB algorithm for the quantification of NGR spectra
PANGAEA
2017
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
2012-12-03T03:05:00
en
Supplementary Publication Series of Datasets
10.1002/2016GC006715
40 datasets
application/zip
Creative Commons Attribution 3.0 Unported
During International Ocean Discovery Program (IODP) expeditions, shipboardgenerated data provide the first insights into the cored sequences. The natural gamma radiation (NGR) of the recovered material, for example, is routinely measured on the ocean drilling research vessel DV JOIDES Resolution. At present, only total NGR counts are readily available as shipboard data, although full NGR spectra (counts as a function of gamma-ray energy level) are produced and archived. These spectra contain unexploited information, as one can estimate the sedimentary contents of potassium (K), thorium (Th), and uranium (U) from the characteristic gamma-ray energies of isotopes in the 40K, 232Th, and 238U radioactive decay series. Dunlea et al. [2013] quantified K, Th and U contents in sediment from the South Pacific Gyre by integrating counts over specific energy levels of the NGR spectrum. However, the algorithm used in their study is unavailable to the wider scientific community due to commercial proprietary reasons. Here, we present a new MATLAB algorithm for the quantification of NGR spectra that is transparent and accessible to future NGR users. We demonstrate the algorithm's performance by comparing its results to shore-based inductively coupled plasma-mass spectrometry (ICP-MS), inductively coupled plasma-emission spectrometry (ICP-ES), and quantitative wavelength-dispersive X-ray fluorescence (XRF) analyses. Samples for these comparisons come from eleven sites (U1341, U1343, U1366-U1369, U1414, U1428- U1430, U1463) cored in two oceans during five expeditions. In short, our algorithm rapidly produces detailed high-quality information on sediment properties during IODP expeditions at no extra cost.
Supplement to: De Vleeschouwer, David; Dunlea, Ann G; Auer, Gerald; Anderson, Chloe H; Brumsack, Hans-Jürgen; de Loach, Aaron; Gurnis, Michael; Huh, Youngsook; Ishiwa, Takeshige; Jang, Kwangchul; Kominz, Michelle A; März, Christian; Schnetger, Bernhard; Murray, Richard W; Pälike, Heiko; Expedition 356 shipboard scientists (2017): Quantifying K, U, and Th contents of marine sediments using shipboard natural gamma radiation spectra measured on DV JOIDES Resolution. Geochemistry, Geophysics, Geosystems, 18(3), 1053-1064
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