Ulug-Sair Au-Bi-Te-Se mineralization is one prospect for native Au in the Western Tuva, and its origin remains debated. Mineralization consists of gold–sulfide–quartz veins host sedimentary rocks (conglomerates, siltstones, shales), quartz–tourmaline, quartz–carbonate–sericite–altered rocks. To determine origin, we examined mineralogical–geochemical features, formation conditions, fluid sources...

The total fibrous and nonfibrous mineral content of the lung has been analyzed in a series of 14 men with lung cancer but no history of occupational dust exposure, and in a series of 14 control men matched for age, smoking history, and general occupational class. The lung cancer patients had an average of 525 +/- 369 X 10(6) exogenous mineral particles and 17.4 +/- 19.6 X 10(6) exogenous minera...

Volcán de Colima is a highly active stratovolcano at the western end of Trans-Mexican Volcanic Belt. Present-day activity consists lava dome growth and destruction cycles, flows, small explosions, larger explosive Vulcanian eruptions. It has been postulated that an increased frequency more mafic eruptions signals run-up to c. 100-year eruptive ‘cycles’, terminating with Plinian eruption such as...

The role of bicarbonated mineral waters on lipid metabolism and lipoprotein concentrations in man has scarcely been investigated. The present study aimed to investigate whether drinking sodium bicarbonated mineral water affects postprandial cholesterol and triacylglycerol metabolism in postmenopausal women. In a three-way, randomised, crossover study, eighteen healthy postmenopausal women consu...

Abstract The paragenesis of carbonate pseudomorphic textures in the rock record that are inferred to represent replaced metastable ikaite (CaCO3·6H2O), which forms at frigid temperatures, is uncertain. Petrographic analysis Mono Lake (California, USA) Pleistocene tufas allowed recognition a distinctive calcite microtexture, termed guttulatic calcite, during dehydration and diagnostic for precur...