The Ayawilca deposit in Pasco, Peru, represents the most significant recent base-metal discovery central Andes and one of largest undeveloped In resources globally. As 2018, it hosts an 11.7 Mt indicated resource grading 6.9% Zn, 0.16% Pb, 15 g/t Ag, 84 In, additional 45.0 inferred 5.6% 0.23% 17 67 a separate Sn-Cu-Ag 14.5 0.63% Sn, 0.21% Cu, 18 Ag. Newly obtained U–Pb dates for cassiterite by ...

Introduction: Gamma ray and neutron spectrometers in orbit around Mars have revolutionized our views of the present distribution of water ice and hydrogenous minerals [1,2]. In particular, hydrogen enhancements (expressed as water equivalent hydrogen, or WEH) at lowand mid-latitudes could potentially be related to comparatively recent climate change on Mars. The identification of glacial landfo...

In two test series, liquid and solid gold-based neutron flux monitor materials were investigated with respect to the effects of neutron absorbers such as chlorine, scattering effects, and the dependence of the enhanced activation caused by the epithermal resonance integral. The liquid monitors were prepared from aqueous solutions of tetraamminegold(III) nitrate and tetrachloroauric(III) acid. T...

Introduction: A primary goal of meteoritics is to determine the physical and chemical environments in the early solar system that led to the properties of planets and other solid bodies. Since metal is highly reac-tive in oxidizing and sulfidizing atmospheres, it and its corrosion scales can record the composition and conditions of any alteration fluid that interacted with it. Metal-troilite-ox...