1. DELTA: Geochem mode. Analysis results of mining activities
Sonia GÜiza González
Geochemistry – International Mining Group (IMG)
Olympus Innov-X

2. Content Mineral processing samples for Exploitation mining.
2. Soil samples for Exploration mining.
3. Standard Rocks for Petrographic identification.
Conclusions

3. 1. Mineral processing samples
CASE DESCRIPTION: Samples sulfurs concentrates of Cormin Laboratory in Peru. Results for: As, Pb, Zn, Cu, Ag.
RESULTS: Laboratory –without information analytical methodology (perhaps AA) and Niton results.
ABREVIATORS:
Lab = laboratory results
D = Delta; geoch = mode geochem; min = mode miner
N = Niton

4. Summary fit parameter (R2)
Element
Delta
Niton
D_Geoch
D_Min
Zinc-Zn
0.985
0.986
0.975
Lead-Pb
0.951
0.943
0.899
Copper-Cu
0.987
0.982
0.963
Arsenic-As
0.239
0.44
0.21

5. Comparison results
Zinc
Lead

6. Cont.
Cupper
Arsenic

7. Silver Analysis Type No. values Range fit parameter (R2) Laboratory 21
70 to 8790 ppm
Delta_geoch 14
78 to 11604
0.9967
Delta_min 3
1210 to 5969
Niton 20
14 to 4883 then 18329
0.7337

8. 2. Auger soil sampling
The presence of a veneer of post-mineralization over-burden and a well developed organic soil horizon posed a problem for surface soil sampling. Hence, auger drill-ing (up to 4 to 5 meters depth) was proposed as an effective method to collect a representative sample from the B-soil horizon sampling target.

9. Description results Count samples: 45
PULP SAMPLE: Sample with preparation requirements (drying, crushing, splitting, pulverizing to 75 micron – 200 mesh).
Chemistry Analysis: ALS-Chemix; ICP-AES; aqua regia digestion.
ABREVIATORS: Lab = laboratory results, D = Delta; gch = mode; s = soil, N = Niton; HH_PA = Handheld Portable Analyzer; N = number values or results >LOD.

10. Comparison type elements
Exclusive elements results by laboratory analysis that was ICP-AES were Ba, Be, Ce, Ga, Ge, Hf, In, La, Li, Na, Re, Sc, Tl
Type
D_gch
D_soil N
NO Lab result, exclusive HH_PA
Cl, Si Cl
Cs, Pd
HH_PA and Lab too.
Al, Mg, P, Ta, Nb, Y
Ba, Sc, Te
Result =
<LOD
Au, Ag, Cd, Sb, Se, Sn, U, W
Co, Mg Co
Hg, Pb, S, Te, Th
HH_PA = Handheld Portable Analyzer; D=Delta and N=Niton.

11. Summary fit parameter (R2)

12. Statistical Analysis
Bold is laboratory result with unit of concentration.
Bold is lab result; D=Delta; gch=geochem; s=soil.

13. Excellent correlation HH_AP&Lab
Iron
Manganese

14. The best is Delta Lead (N was <LOD)
Zinc (N got 33 results, D got 45)

15. Geochem is not the best Calcium, D_gch got 13 results only
Cupper, D_gch got 26 results only

16. N is the best
Potassium
Vanadium

17. Logarithmic Scale
Niobium
Arsenic

18. Other examples Nickel depend to LOD, better Delta
Ytrium result the best of Delta (Niton haven’t this element)

19. 4. Standard rocks of USSG Standard Type AGV-2 Andesite CLB-1 Coal
COQ-1
Carbonatite
DNC-1
Diabase
DTS-2b
Dunite
DGPM-1
Disseminate gold
NOD-A-1
Manganese nodule
SGR-1b
Shale
W2a

20. Comparison major elements as oxides

21. Correlation coefficient diagram

22. Comparison for element
D=Delta geochem mode

23. Comparison every samples
Standard
Delta_geochem
Standard
Delta_geochem

24. Trace elements Lab = Standard result; D=Delta
Ds=mode soil and Dgch=geochem

25. Conclusions
1. Geochem mode for exploitation mining is recommendable if there are elements of low concentration and custom need some light elements.
2. Soil mode for exploration mining is more recommendable that geochem mode because, samples as soil or sediment has a low concentration of elements.
3. Geochem mode is recommendable for lithological studies, which are important comparison of rocks and geochemistry orientation survey.

26. Other conclusions
Geochem mode should replace Mining Plus Mode, but NOT mining. This mode has one beam so the time of analysis is quickly as possible. Mining mode is an excellent option for fast diagnostic, for example As and Pb on gold samples.
Geochem LOD has some differences than Soil mode. It is necessary to know what elements and what is the difference of LOD. Geochem mode have NOT replaced the soil mode yet.
Geochem Mode is necessary to review some elements add if it is more useful in mining activities as tellurium by gold exploration or remove some elements. Other case is Neobium has a good result on logarithmic scale.