XRF technique determines the elemental composition of a sample by measuring the spectrum of the characteristic X-ray fluorescence emitted by different elements within the sample, when it is struck by X-radiation from an external source.
XRF analysis provides measurements of relative elemental abundances (down to limits of a few parts per million), which create a quantifiable basis for understanding mineralogy, provenance, depositional environment (e.g., redox), and diagenetic history. Geologic samples for XRF analysis can be drilling cuttings, core materials including whole or slabbed cores and core plugs, rocks at outcrop, and sediments.
XRF Applications
• Measurements of relative elemental abundances
• Geochemical logs (major/minor elements and ratios)
• Spectral Gamma Ray calculated from Potassium (K), Uranium (U), and Thorium (Th)
• Correlate with XRD data and infer mineral composition
• Statistic results from XRF data for identification of different formation packages
• Well correlation using statistics help define formation units
• In-situ geochemical analyses directly on cores or outcrops
• XRF-aided Chemosteering (24/7 service with real-time data interpretation)
XRF Instruments
ALS facility own versatile XRF instruments to cover all needs:
BRUKER S4 PIONEER
• Highest data quality
• Wavelength Dispersive XRF
• Up to 36 elements from Sodium (Na) to U
• Large sample compartment for measuring up to 60 samples at a time
• Rapid turnaround
• Non-destructive sample material
SPECTRO XEPOS
• High precision and reliable results for up to 58 elements
• Energy Dispersive XRF
• Auto sampler for up to 12 samples at a time
• Suitable for portable labs and well-site locations
SPECTRO HAND-HELD
• Ultra-portable unit for fast results (~1 minute)
• No or limited sample preparation
• On board camera for ultra-precision targeting
• Direct analysis on cores for producing in-situ high resolution geochemical profiles
• Direct analysis of filled veins, vugs, and fractures