Introduction: The Martian crust is globally dominated by primary igneous minerals found in basalt (plagioclase, pyroxene and olivine) with limited degrees of surface alteration at high-latitudes [e.g. 1-4]. On local scales, a diversity of secondary hydrated mineral-phases (phyllosilicate, sulfate, opal, and carbonate) has been identified [e.g. 5-6]. Ice and transient water appear to have a regi...

he possibility to obtain sintered material from alkaline basaltic tuffs is demonstrated. The parent rock was milled for 10–15 min, the resulting owder was pressed at 100 MPa and the obtained samples were heat-treated in the range of 1000–1140 ◦C. The sintering behaviour and the phase ormation were studied by pycnometry, dilatometry, DTA, XRD and SEM. The final material was obtained by sintering...

The Azores archipelago is located in the Atlantic Ocean and is composed of nine volcanic islands. S. Miguel, the largest one, is formed by three active, E-W trending, trachytic central volcanoes with caldera (Sete Cidades, Fogo and Furnas). Chains of basaltic cinder cones link those major volcanic structures. An inactive trachytic central volcano (Povoação) and an old basaltic volcanic complex ...

New geochemical data for Pleistocene magmatic rocks from the Surigao peninsula, eastern Mindanao, the Philippines, demonstrate typical adakitic traits, including elevation of Sr /Y and depletion of the heavy rare earth elements. Sr / Sr and Nd / Nd ratios of the adakites do not support melting of the subducted Philippine Sea Plate but resemble Pliocene arc lavas generated in the same subduction...