Origin of secondary sulfate minerals on active andesitic stratovolcanoes

Sulfate minerals and organic compounds on Mars

Strong evidence for evaporitic sulfate minerals such as gypsum and jarosite has recently been found on Mars. Although organic molecules are often codeposited with terrestrial evaporitic minerals, there have been no systematic investigations of organic components in sulfate minerals. We report here the detection of organic material, including amino acids and their amine degradation products, in ...

Thermobarometry and origin of andesitic lavas in Zoolesk area based on mineral chemistry (northeast of Sarbisheh, east Iran)

In Zoolesk area, about 11km northeast of Sarbisheh city in South Khorasan Province, volcanic rocks including andesite, dacite and rhyolite have cropped out where andesitic lavas have the maximum distribution and have been studied in this research.The main textures of andesites are porphyry with microlitic-glassy groundmass, glomeroporphyry and vesicular. Minerals forming andesites include plagi...

Minerals Their Constitution and Origin

Minerals: Their Constitution and Origin is an introduction to mineralogy for undergraduate and graduate students in the fields of geology, materials science, and environmental science. It has been designed as a textbook for use on a semester course and covers all aspects of mineralogy in a thoroughly modern and integrated way. The book is divided into five parts. Part I deals with the general c...

Large-eruption rates of stratovolcanoes

The large-eruption rates of stratovolcanoes are modelled exchangeably, in order to derive an informative prior distribution as an input into a subsequent volcano-by-volcano hazard assessment. Derivation and implementation of the likelihood function is not straightforward, necessitating a detailed code verification. Analysis of the LaMEVE database suggests that most of the world’s stratovolcanoe...

Dating of Secondary Minerals in Nakhlites