Work Description

Dataset title: Scanning X-ray fluorescence (XRF) for SPR0901-04BC

Dataset contact: Ingrid L. Hendy

Data citation: Hendy, I.L., Wang, Y. (2019). Scanning X-ray fluorescence (XRF) for SPR0901-04BC [Data set]. University of Michigan Deep Blue Data Repository. https://doi.org/10.7302/scvn-db08

Latitude: 34.2816°N
Longitude: 120.0415°W
Water depth:588 m
Core retrieval Date:2009.1
Core type: Box core
Research Vessel: R/V Sproul

Overview: This dataset includes scanning X-ray fluorescence (XRF) data for the core SPR0901-04BC.

Methods: SPR0901-04BC were scanned at 200-µm resolution on an ITRAX X-ray fluorescence (XRF) core scanner (Cox Analytical Instruments) at the Large Lakes Observatory, University of Minnesota, Duluth in 2010. The scanner is equipped with a Cr X-ray tube, and operated with an 8-second scan time at 30 kV and 15 mA.

Files contained:
'SPR0901-04BC_42.7 to 70.0 cm.csv': scanning XRF data from 42.7-70.0 cm of the core
'SPR0901-04BC_42.7 to 70.0 cm_repro.csv': Re-interpreted 42.7-70.0 cm data with improved peak fitting algorithm and more elements fitted.
'SPR0901-04BC_0 to 42.9 cm_repro.csv': scanning XRF data from 0-42.9 cm of the core

Each file contains some or all of the variables listed below.

Variables:

Position(mm): Scanning XRF sample depth;
sample surface: Height above the D-shaped core bottom;
validity: 1 if pass the quality check;
E-gain, E-offset, F-slope, F-offset: Adjustments to energy-channel relationship during spectral analysis of raw XRF spectra;
kcps (kilo counts per second): Total photon counts per second;
MSE: Mean square error in the peak fitting;
Al: Aluminum peak area;
Si: Silicon peak area;
P: Phosphorus peak area;
S: Sulfur peak area;
Cl: Chlorine peak area;
Ar: Argon peak area;
K: Potassium peak area;
Ca: Calcium peak area;
Sc: Scandium peak area;
Ti: Titanium peak area;
V: Vanadium peak area;
Mn: Manganese peak area;
Fe: Iron peak area;
Co: Cobalt peak area;
Ni: Nickel peak area;
Cu: Copper peak area;
Zn: Zinc peak area;
Ga: Gallium peak area;
Ge: Germanium peak area;
As: Arsenic peak area;
Se: Selenium peak area;
Br: Bromine peak area;
Rb: Rubidium peak area;
Sr: Strontium peak area;
Y: Yttrium peak area;
Zr: Zirconium peak area;
Mo: Molybdenum peak area;
Ba: Barium peak area;
Pr: Praseodymium peak area;
Eu: Europium peak area;
Ta: Tantulum peak area;
W: Tungsten peak area;
Bi: Bismuth peak area;
Po: Polonium peak area;
CaA+CaA: Sum peaks generated by the combination of Ca Kα and Ca Kα energy;
CaA+CrA: Sum peaks generated by the combination of Ca Kα and Cr Kα energy;
1, 2, 3: Peak fitting algorithm output;
inc: Cr (Chromium X-ray tube) incoherent scattering;
coh: Cr (Chromium X-ray tube) coherent scattering;