| Summary: | Machu Picchu Peruvian station is located on King George Island, South Shetland Islands, Antarctic Peninsula. Hydrogeology research were conducted during the austral summer 2015, we took groundwater samples in 7 piezometers for analysis of major and minor components, and dissolved metals. Machu Picchu aquifer is a detrital aquifer and it is composed of glacial, alluvial, marine, fluvial, alluvial fluvial and alluvial glacial deposits. Lithological data in piezometers show that about 3 meters deep, there are 3 horizons (Ng et al., 2015): Horizon H1 (more superficial, permeable and porous soil), Horizon 2 (intermediate, semi-permeable to impermeable) and Horizon 3 (depper horizon, permeable and porous ground where groundwater is stored). Groundwater flow is from South to North. Electrical conductivity in the piezometers are low: 92.45 (PZ-08), 126.1 (PZ-07), 218.0 (PZ-04), 219.2 (PZ-03), 219.6 (PZ-06), 324.4 (PZ-09) and 512.5 uS/cm (PZ-05). Watertypes are mixing: Na-Ca-Cl-SO4 (PZ-08), Ca-Na-SO4-HCO3-Cl (PZ-07), Ca-Na-SO4 (PZ-04), Na-Ca-Mg-SO4-Cl (PZ-03), Ca-Na-SO4-Cl-HCO3 (PZ-06), Na-Ca-Mg-SO4-Cl (PZ-09) and Ca-SO4 (PZ-05). Na and Cl values are related to local recharge by thawing snow. Groundwater has low values of Al, Cu, Sr, He, Li, Mn, Ni and Zn; while values of Sb, As, Be, Bi, Cd, Cr, Sn, Hg, Mo, Ag, Pb, Se, Ti, U y V were below the detection limit.
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