Skip to main content
Swiss Journal of Geosciences
Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Sediment provenance during Alpine orogeny: fluid inclusions and stable isotopes on quartz–calcite veins from detritic pebbles

Fig. 3

Microphotographs in transmitted-light illustrating key vein textures. a Typical mixed quartz and calcite vein, here observed in a basalt pebble. Note the crystallization of the quartz (Qz) in the wall and of the calcite (Ca) in the centre suggesting the circulation and precipitation of two successive fluids. b Monomineralic calcitic vein displaying a geodic crystallization. Crossed polarizers. c Monomineralic calcitic vein with a fibrous crystallization perpendicular to the wall of the vein. Crossed polarizers. d Illustration of vein superimposition due to different phases of rock fracturing. Note the multi-opening of this vein illustrated by two phases (P1 and P2) of quartz and calcite crystallization. Crossed polarizers. e Adularia (Ad) crystals growing at the contact to wall-rock and forming a palisade before the crystallization of quartz (Qz) and calcite (Ca). Crossed polarizers. f Mixed vein where chlorite (Chl) and epidote (Epi) minerals are associated to calcite (Ca)

Back to article page