ammonium Argentina 6 South America 6 infrared spectroscopy 6 Ammonium anomalies 4 Mining exploration guide 4 SWIR reflectance spectroscopy 4 clay mineral 4 detection method 4 host rock 4 hydrothermal alteration 4 identification method 4 mineral deposit 4 mineral exploration 4 mining 4 potassium 4 reflectance 4 sulfate 4 nitrate 3 Ammonium compounds 2 Animalia 2 Artificial substrates 2 Astacoidea 2 Bacillariophyta 2 Biofilm 2 Buddingtonite 2 Cherax quadricarinatus 2 Ciliophora 2 Clay minerals 2 Cyanobacteria 2