Table 1 Mineralogy of 11 samples expressed by relative presence of different minerals, by XRD
Mineral type | Mineral | Formula* | Viña del Cerro (VC) | Punta Brava (PB) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Site | SE slope | Mine | Site | Mine | |||||||||
41VCM | 42VCM | 43VCM | 38VCM | 39VCM | 40VCM | 44PBM | 45PBM | 46PBM | 47PBM | 48PBM | |||
Copper carbonate | Malachite | Cu2CO3(OH)2 | xxx | – | – | – | xx | – | – | xxx | – | – | xx |
Azurite | Cu3(CO3)2(OH)2 | – | – | – | – | – | – | – | – | – | xx | – | |
Copper sulfate | Brochantite | Cu4SO4(OH)6 | – | xxx | xxx | – | – | – | xx | - | xx | – | x |
Copper halide | Buttgenbachite** | Cu19Cl4(NO3)2(OH)32·2H2O | – | – | xx | – | – | – | – | – | – | – | – |
Clinoatacamite | Cu2(OH)3Cl | – | – | – | – | xx | x | – | – | – | – | – | |
Silicate | Quartz | SiO2 | x | xx | – | xx | xx | xx | xxx | - | xxx | xx | xxx |
Plagioclase | (Na,Ca)(Si,Al)4O8 | – | – | – | – | – | xx | – | – | – | – | – | |
Phyllosilicates | – | xx | xx | xx | xxx | xx | xx | xx | – | xx | xx | xx | |
Iron oxide | Hematite | Fe2O3 | – | xx | – | – | – | – | – | – | – | – | – |
Calcium carbonate | Calcite | CaCO3 | – | – | – | x | – | – | – | – | – | – | – |
Phosphate | Apatite | Ca5(PO4)3(F,Cl,OH) | – | – | – | - | – | – | – | – | – | – | (?) |