Writers : Darvishzadeh.A and Mirmohammadi.M.S
Refference : Geosciences Scientific Quarterly Journal,No.:17-18,P.:2
Publishing Year : 1374

Abstract :

The intrusion of Kamtal Igneous body into a series of Late Cretaceous rocks with a varied lithologies,
has brought about extensive, as well as considerable thickness of contact metamorphism (aureole metamorphism). Petrographic investigation, accompanied with the XRD analysis of various rock- samples demonstrated that alblite - epidote faنies grade of metamorphism (low- grade) occurred away from the igneous marginal zones, whereas, pyroxcene- hornfels facies (high- grade) took place close to the marginal areas.
With regards to the mineralogical paragenesis of the samples, the temperature - pressure condition for oC oC
the albite- epidote tacies of metamorphic aureole is estimated at 300 - 400 under the pressure of 1.5-2 Kbr. While, for corresponding pressure for pyroxene- hornfels facies is 600 oC to 75() oC Presence of garnets with varying compositions in the garnetites and the late- stage epidote- bearing garnet veins, is indicative of changing composition in hydrothermal fluids during the intrusion and evolution of Kamtal Igneous body.

Subject List : Intrusive rocks