Tailings Characterization by MPT
Real time measurement of element concentrations by utilizing our MPT technology. The Metal Probing Tool (MPT) contains a x-ray fluorescence based detector which measures metal concentrations. The detector is build in a small probe which can be advanced into the tailings material by static force. The tool can be combined with Cone Penetration Testing (CPT) and other detectors like Electric Conductivity (EC) for supplementary data.
We can use all kind of equipment for pushing the probe like CPT-trucks and units, Direct Push rigs (Geoprobe) or hydraulically driven stand alone rigs.
The MPT approach deliveres accurate and high resolution data of element concentrations in real time. Compared to traditional drilling and sampling it is cost effective and very fast (up to 150 m/day).
Calibration of MPT data
For supporting the MPT data additional tools like the Hydraulic Profiling Tool (HPT) can be applied for ghetting a better unterstanding of the hydraulic features of the tailing. The HPT alows for identifying preferential pathways and for evaluating permeabilities.
During this step of investigation discrete samples will be taken for lab testing and mineralogical analysis. The locations and depth of samples will be chosen based on the MPT data. For collecting samples small diameter tools based on Direct Push technologies are available.
Clustering the Geometry
The tailing body will be clustered by diffenciation of individual internal structures. Due to the evolution of the tailing body these are mostly artificial sedimentological patterns.
The clustering is based on:
- CPT soil classification (if applied)
- Mineral composition
- Hydraulic permeability
- Statistic indicators
3D Model of Metal concentrations
This step includes the geospatial interpolation and modeling. The 3D model is based on segment individual and whole deposit statistics. It allows for identification of zones yielding significant concentrations of metals.
The model considers variography, mineralogy, mineral liberation analysis, element associations and mobility.
Block Model based on 3D Interpolation
This step includes the definition of block-individual ore grades. Non value areas will be delineated by cut-off criteria.
Further steps can involve:
- Clustered Resource Estimation
- Resource Statement according to international Standard(s)
- Assessment of deposit development
- Transformation of resources to reserves