bureau veritas minerals analytical advancements
TRANSCRIPT
BUREAU VERITAS MINERALS Analytical Advancements
Jamil A. Sader & John Carter Exploration 2017 - Toronto, Canada
BUREAU VERITAS MINERALS INNOVATIONS
1 | LASER ABLATION ICP-MS ANALYSIS 2 | INFRARED SPECTROSCOPY AND MACHINE LEARNING 3 | MineDSI CORELOGGING APPLICATION
LASER ABLATION ICP-MS
LITHOGEOCHEMISTRY
LASER ABLATION BENEFITS
§ Total analysis at trace and ultra trace detection limits equivalent to mixed acid ICP-MS packages
§ Simplifies the analysis process to a single, cost effective fusion.
§ XRF and ICP-MS capabilities can be combined to extend the dynamic range in one analysis (eg. U from 10ppb to % level)
§ Minimises hazards and waste due to elimination of corrosive acids.
• Utilizes high productivity robotic fusion technology coupled with state-of-the-art laser ablation and ICP-MS instruments
• Provides a fully extracted quantitative analysis for all elements. • Detection limits are comparable to industry leading mixed acid trace
element ICP-MS packages.
%
ppm
ppb
ppt
Single Acid Aqua Regia Multi Acid Fusion
INCREASING EXTRACTION - TOWARDS QUANTIFICATION IC
P-ES
AA
S
XRF
ICP-
MS
XRF-
LA-IC
P-M
S
ICP-
ES
AA
S
ICP-
MS IC
P-ES
ICP-
MS IC
P-ES
ICP-
MS
INCREASING DETECTION LIMITS
LASER ABLATION ICP-MS
LITHOGEOCHEMISTRY
LASER ABLATION ICP-MS
SPOT ANALYSIS ELEMENT MAPS • Chemical Vectoring
• Fingerprinting
• Element Deportment
• Mineral Associations
• Inclusions
• Sample is presented to a light source - no special preparation.
• The response from the sample is measured by a detector.
Hylogger Near Infrared, Short Wave Infrared (0.35 – 2.5 µm) Fourier Transform Infrared Spectroscopy (FTIR) Mid to Thermal Infrared (1.7 – 26.5 µm)
• Spectra is representative of the molecular
bonding in the sample. • Absorption of incident light at specific
characteristic wavelengths. • Bond vibration, bending and stretching.
02 SPECTRAL ANALYSIS
FTIR & MACHINE LEARNING
How do we use this data for routine analysis?
► Calibration involves the comparison of FTIR spectral features to empirical analysis for a representative sample set (i.e., geochemistry, XRD, metallurgical parameters).
► The success of calibrating an element, mineral or property relies on it having a spectral fingerprint that is distinguishable in the IR range.
Mineralogy • Hematite, Goethite, Gibbsite, Kaolinite, Talc, Mica, Quartz
Physical properties • LOI, SG, Bulk Density
Ore processing properties • Comminution energy, recovery, acid consumption
Ore classification • Grade, block, stockpile, blending
Chemistry • Fe, Al, Si for laterites and Cu, Ni, Pb, Zn for base metal ores • Fe2+/3+ speciation
FTIR MACHINE LEARNING ANALYTES
RESULTS Matrix/dominant minerals – Fe ore
Element – Ni laterite RESULTS
Element speciation – Fe2+ RESULTS
RESULTS Ore Processing Properties
Key benefits: § Relate geological interpretations to analytical data instantaneously through intuitive visualisation tools § Manual Measurements are eliminated § Instantly create a geological database from your visual description § Interface data to your preferred mine resource planning application
MineDSi, is a core logging software interface that is operated using a PC laptop or Windows enabled tablet.
MineDsi - CORELOGGING
Core is scaled: u Eliminate manual measurements including rock quality determination (RQD)
measurements. u Discriminate between driller fractures vs. real geological features.
MineDsi - CORELOGGING
TIME SAVINGS
u Digital Geological Descriptions: u Descriptions only entered once
– no transposing from paper to computer.
u Fully customizable tracks (columns).
u User-specific track template easily created.
u Can compare assay results to photo mosaic and descriptions.
MineDsi - CORELOGGING
FLEXIBLE AND CUSTOMIZABLE
Core photos taken with standardized positioning and lighting
Photos uploaded, RQD and other manual measurements done digitally
Relational database stitches images and descriptive data together.
Free MineDSi viewer and real-time monitoring. Data export in several formats.
Upload other geophysical, spatial ASD Halo/TerraSpec
Lab analyses uploaded via BVM WebAccess portal
A USER-DEFINED SERVICE AND SOFTWARE PLATFORM
MineDsi – CORELOGGING SUMMARY
