Many of the veins enclosed within the Paleozoic basement of the Catalonian Coastal Ranges show severa1 common characteristics: low temperature of formation (between 75 and 200°C), the presence of complex polisaline fluids and a certain relationship to the pretriassic paleosurface. Mineralogical composition and age are variable, ranging from Pb-Zn veins with carbonate gangue of late Hercynian ag...

Introduction: Basic knowledge about the composition and structure of the Moon was provided by the space missions of the USSR (Luna since 1959) and USA (Ranger and Surveyor since 1964). In particular Apollo missions 11 to 17 (1969-1972) with ca. 2200 samples (380 kg) gave new highlights and understandings for the geological research of our neighbor. Additional material was sampled by the Russian...

OMEGA (Observatoire pour la Minéralogie, l’Eau, les Glaces et l’Activité) is a visible and near-IR mapping spectrometer, operating in the spectral range 0.385.1 μm. Combining imaging and spectrometry, it will study the mineralogical and molecular composition of the surface and atmosphere of Mars through the spectral analysis of the diffused solar light and surface thermal emission. OMEGA will p...

Optical properties and mineralogical composition of different Saharan mineral dust samples: a laboratory study C. Linke, O. Möhler, A. Veres, Á. Mohácsi, Z. Bozóki, G. Szabó, and M. Schnaiter Forschungszentrum Karlsruhe, Institute of Meteorology and Climate Research, P.O. Box 3640, 76021 Karlsruhe, Germany University of Szeged, Faculty of Natural Sciences, Department of Optics and Quantum Elect...

The composition of the silicate portion of Martian regolith fines indicates derivation of the fines from mafic to ultramafic igneous rocks, probably rich in pyroxene. Rock types similar in chemical and mineralogical composition include terrestrial Archean basalts and certain achondrite meteorites. If these igneous rocks weathered nearly isochemically, the nontronitic clays proposed earlier as a...

Along a long-term ecosystem development gradient, soil nutrient contents and mineralogical properties change, therefore probably altering soil microbial communities. However, knowledge about the dynamics of soil microbial communities during long-term ecosystem development including progressive and retrogressive stages is limited, especially in mineral soils. Therefore, microbial abundances (qua...

[1] We constrain SH wave velocity structures near the 660-km discontinuity beneath South America and northeast Asia, using triplicated phases near the discontinuity recorded in the epicentral distance range of 10 –35 for three deep events. We then explore mineralogical and compositional models appropriate for explaining the inferred seismic structures between the two regions. SH velocity struct...