EN I For this week’s #TuesdayFieldMemories we would like to share a mylonitic calc-silicate from Southern Italian Alps (Forno Rosa Shear zone, in the Ossola Valley in Simonetti et al. 2023), courtesy of Dr. Stefania Corvo, which she will further discuss on our P-T- t talk session this Thursday. We see you there! Milonito calcissilicáticoContinue reading “[TFM] Mylonitic calc-silicate from Southern Italian Alps”
Tag Archives: deformation
[TST] Garnet porphyroclasts in ultramylonite from the Southern Italian Alps
EN I For todays #ThinSectionThursday, we present garnet porphyroclasts in an ultramylonite from the Southern Italian Alps, Premosello shear zone, Ossola Valley (courtesy of our next P-T-t talker Dr. Stefania Corvo). This feature will be part of her talk next week, on Sept 14th, in which she’ll discuss the interplay between deformation and metamorphism withContinue reading “[TST] Garnet porphyroclasts in ultramylonite from the Southern Italian Alps”
[TFM] Pseudotachylite from the Juru shear zone (PB, Brazil)
EN I This #TuesdayFieldMemory is a pseudotachylite from the Juru shear zone (PB, Brazil) showing the main vein (centimetric) containing quartz and feldspar fractured clasts. From the main vein, injection veins oriented obliquely to its configuration are present, in which relitic grains of recrystallized quartz are observed. Contribution by Gustavo Viegas @lgviegas This rock andContinue reading “[TFM] Pseudotachylite from the Juru shear zone (PB, Brazil)”
[TST] Ultraclasite from the Pernambuco shear zone (PE, Brazil)
EN I Our #ThinSectionThursday this week is an ultracataclasite from the eastern Pernambuco shear zone (PE, Brazil) containing heterogeneous fragments of ultramylonite, plagioclase and quartz. Recrystallised quartz aggregates are observed at the contact of the ultracataclasite with its host granite. (Lambda plate inserted). This rock and its geological context will be discussed on our nextContinue reading “[TST] Ultraclasite from the Pernambuco shear zone (PE, Brazil)”
PETROCHRONICS 