Presentation (1).pptx

Petrography

1. IGNEOUS PETROLOGY DR.RS.KUMAR

2. SYNEITES GROUP-2

3. INTRODUCTION TYPES ORGIN OCCURRENCE USES OUTLINE

4. INTRODUCTION Syenite is a coarse-grained intrusive igneous rock. With a general composition similar to that of granite, but deficient in quartz, Which, if present at all, occurs in relatively small concentrations (< 5%).

5. “ Clinopyroxene , hornblende, biotite mica, or olivine may be present in minor proportions”

6. Based on the composition the SYENITE is classified into ALKALIC SYENITE NEPHELINE SYENITE CALC SYENITE NEPHELINE SYENITES

7. Granite is a common type of felsic (acidic) intrusive igneous rock and can be predominantly white, pink, or gray in color, depending on mineralogy. Granite contains between 20% and 60% quartz by volume, and at least 35% of the total feldspar consisting of alkali feldspar. Granite is a common type of felsic (acidic) intrusive igneous rock and can be predominantly white, pink, or gray in color, depending on mineralogy. Granite contains between 20% and 60% quartz by volume, and at least 35% of the total feldspar consisting of alkali feldspar. Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz (i.e. <5%) The feldspar component of syenite is predominantly alkaline in character (usually orthoclase). Plagioclase feldspars may be present in small proportions, less than 10%. The difference between SYENITE and GRANITE GRANITE SYENITE

8. Fluorescent syenite