GOLD EXPLORATION GEOCHEMISTRY
Our techniques for detection of gold are optimised for surface and near-surface exploration, where anomalies can be very small, and signal discrimination is paramount.
Processes are designed to minimise the possibility of contamination, from barren-washing of pulveriser bowls during sample preparation through to use of disposable vessels for all stages of digestion and analysis.
Current-generation ICP-mass spectrometry (ICPMS) is used for elemental determination, yielding reliable sub-part per billion detection limits.
Ultrafine+ (TM)
Separation and collection of ultrafine (< 2 µm) fraction from soil samples. Analysis of 40-element suite on the fine fraction, plus pH, salinity (conductivity), particle size distribution, and clay mineralogy (ASD).
Rudaki Lab Code UFF+: Collection and analysis of <2µm fraction for all UFF+ parameters.
Aqua-Regia extraction
Our aqua-regia extraction was purpose-designed for geochemical exploration. The recovery of gold from regolith materials is excellent, and the technique is very sensitive. Sample masses of 25g or 40g are typically taken from the pulverised or screened bulk for analysis.
Rudaki Lab Codes WAR-25 and WAR-40 Au – 0.5ppb detection limit.
Multi-element Gold Exploration Package
Our EXPRESS GOLD+20 package is a targeted gold/base-metals exploration suite that yields excellent detection limits for gold and indicator metals. It combines the WAR-25 gold analysis with a selection of 20 elements from the MAR multielement digest.
Rudaki Lab Code EXPRESS AU+20*
|
Element |
DL (ppm) |
Element |
DL (ppm) |
Element |
DL (ppm) |
Element |
DL (ppm) |
|
Ag |
0.01 |
Cr |
2 |
Mo |
0.1 |
Tl |
0.02 |
|
As |
0.5 |
Cu |
0.2 |
Ni |
0.5 |
U |
0.02 |
|
Au |
0.0005 |
Fe |
100 |
Pb |
0.2 |
W |
0.01 |
|
Bi |
0.01 |
Hg |
0.01 |
S |
50 |
Zn |
0.2 |
|
Cd |
0.02 |
In |
0.01 |
Sb |
0.01 |
||
|
Co |
0.2 |
Mn |
2 |
Te |
0.01 |
