Ryan, J. G., Shervais, J. W., Li, Y., Reagan, M. K., Li, H. Y., Heaton, D., Godard, M., Kirchenbaur, M., Whattam, S. A., Pearce, J. A., Chapman, T., Nelson, W., Prytulak, J., Shimizu, K. and Petronotis, K. (2017). Application of a handheld X-ray fluorescence spectrometer for real-time, high-density quantitative analysis of drilled igneous rocks and sediments during IODP Expedition 352. Chem. Geol., 451. S. 55 - 67. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1878-5999

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Abstract

Handheld energy dispersive portable X-ray spectrometers (pXRF) are generally designed and used for qualitative survey applications. We developed shipboard quantitative analysis protocols for pXRF and employed the instrument to make over 2000 individual abundance measurements for a selection of major and trace elements on over 1200 m of recovered core during the eight weeks of the International Ocean Discovery Program (IODP) Expedition 352 to the Izu-Bonin forearc. pXRF analytical performance, accuracy and precision were found to be the same on powdered rock samples and on freshly cut rock surfaces, and sample results were similar within error to measurements made via shipboard ICP-OES analysis save at low abundance levels for a few elements. Instrument performance was optimal for elements between Z = 19 and Z = 40, and the system yielded reproducible data for K, Ca, Ti, V, Cr, Mn, Fe, Cu, Zn, Rb, Sr, and Zr on both powdered samples and rock surfaces. Working curves developed via pXRF measurement of a suite of geologic standard reference materials and well-characterized lavas permitted accurate quantitative measurements for many of the examined elements on both sample powders and rock surfaces. Although pXRF has been sporadically employed on previous cruises, Expedition 352 is the first time a detailed, high -density chemostratigraphy of recovered core samples was collected using pXRF measurements of rock core surfaces. These high -resolution data allowed the recognition of chemically distinct eruptive units in near real-time. The rapid identification of geochemical trends vastly improved our selection of samples for shipboard and shore -based analysis, permitted a more comprehensive interpretation of our Expedition results, and provided key decision -making information for drilling operations. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Ryan, J. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shervais, J. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Li, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reagan, M. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Li, H. Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heaton, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Godard, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirchenbaur, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Whattam, S. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearce, J. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chapman, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nelson, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prytulak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shimizu, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petronotis, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-239553
DOI: 10.1016/j.chemgeo.2017.01.007
Journal or Publication Title: Chem. Geol.
Volume: 451
Page Range: S. 55 - 67
Date: 2017
Publisher: ELSEVIER SCIENCE BV
Place of Publication: AMSTERDAM
ISSN: 1878-5999
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CHARACTERIZING SOILS; ELEMENT ANALYSIS; XRF; RECORDS; METALSMultiple languages
Geochemistry & GeophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/23955

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