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Data report: calibration of XRF-estimated CaCO3 along the Site U1338 splice: Expedition 320/321

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Proceedings of the IODP

Integrated Ocean Drilling Program

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      Abstract

      We combined X-ray fluorescence (XRF) scan data from Integrated Ocean Drilling Program Expedition 321 Site U1338 and a set of 1060 discrete CaCO3measurements to calibrate a high-resolution XRF-estimated CaCO3 profile for Site U1338. In this data report, we describe the method of calibration, using normalized median-scaled XRF data and discrete CaCO3 measurements. A subset of ~¾ of the discrete measurements was used to calibrate the XRF scan, and the quality of the calibration was checked with the remainder of the discrete data. Based upon the check data, the calibrated XRF CaCO3 estimate is within ±5% of the independent discrete measurements (1 standard deviation). The calibrated XRF CaCO3 estimate provides, for the first time, a carbonate profile for the middle Miocene–Holocene with a resolution of ~2 k.y. for the uppermost 60 compressed meters composite depth below seafloor and ≤1 k.y. resolution in the rest of the sediment section.

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      Vast Neogene laminated diatom mat deposits from the eastern equatorial Pacific Ocean

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            Author and article information

            Journal
            10.2204/iodp.proc.320321.2010
            Proceedings of the IODP
            Integrated Ocean Drilling Program
            1930-1014
            05 April 2013
            10.2204/iodp.proc.320321.205.2013

            This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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