The challenge of finding new mineral resources is a complex activity that requires a multidisciplinary and integrated approach. Petrography is one of the most efficient and cost effective investigation tool, and provides several benefits (see Table 1).
TABLE 1: PETROGRAPHIC RESULTS, OUTCOMES AND BENEFITS
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Petrographic Results | Outcome and Benefits |
---|---|
Accurate rock type classification, including subtle differences among magmatic, metamorphic and sedimentary rock types. | More precise logging system, a more representative database, and more accurate geological interpretation. |
Description of microstructures and mineral reactions. | Identification of geological process and detailed geological history. |
Breccia classification. | Hydrothermal breccia types can be distinguished and characterized by petrographic analysis. |
Mineral identification (Photomicrographs 1‒3) and modal percentages. | Correct interpretation of the geochemical data. In most cases paragenetic sequences can be detailed (see below). |
Paragenetic sequence (of rock-forming minerals and ore-minerals, e.g., Figure 1). | Identification of the appropriate petrogenetic model. |
Alteration assemblage. | Definition of environment of formation (e.g., K-feldspar alteration in a porphyry-style environment). |
Fluid inclusion mapping (in quartz and carbonates). | The essential step before a fluid inclusion study. |
Elemental composition of minerals (e.g., Photomicrographs 4a, 4b, and Figure 2). | Identification of all the ore-minerals within the mineralization. |
PETROGRAPHIC ANALYSIS CAN HELP
Depending on the exploration stage and the complexity of the project, the petrographic analysis can help in:
- the conceptual targeting of greenfield exploration areas;
- interpreting the geological framework hosting the mineralization;
- vectorizing the drilling program;
- defining the petrogenetic model of the mineralization
Feel free to contact us for a free consultation on your explanation needs and pricing of our services.
Photomicrograph 1

Photomicrograph 2

Photomicrograph 3

Figure 1

Photomicrograph 4

Figure 2
