leucogranite

leucogranites are light colored granitic rocks with almost no dark minerals. Leucogranites have been reported from a variety of orogenies involving continental collisions. The leucogranite magmas are interpreted to have been derived by melting of pelitic rocks in the upper portions of thickened crust.


rocheagrenat.jpg

Leucogranite sample with red Garnets.





Bibliography



• Ron H. Vernon (2004): A pratical guide to rock microstructure. Cambridge editore
• Eric A.K.Middlemost (1985): Magmas and Magmatic Rocks. Longman, London
• Ron H. Vernon (2004): A pratical guide to rock microstructure. Cambridge editore


Photo
microleucogranito(2).jpg

Quartz and feldspar in a Leucogranite. XPL image, 2x (Field of view = 7mm)
microleucogranito(3).jpg

Quartz, garnet and feldspar in a Leucogranite. PPL image, 2x (Field of view = 7mm)
microleucogranito(4).jpg

Quartz, garnet and feldspar in a Leucogranite. XPL image, 2x (Field of view = 7mm)
microleucogranito(5).jpg

Quartz, Biotite, garnet and feldspar in a Leucogranite. PPL image, 2x (Field of view = 7mm)
microleucogranito(6).jpg

Quartz, garnet and feldspar in a Leucogranite. PPL image, 2x (Field of view = 7mm)
microleucogranito(7).jpg

Quartz and feldspar in a Leucogranite. XPL image, 2x (Field of view = 7mm)
microleucogranito(8).jpg

Quartz and feldspar in a Leucogranite. XPL image, 2x (Field of view = 7mm)
microleucogranito(9).jpg

Quartz and feldspar in a Leucogranite. XPL image, 2x (Field of view = 7mm)
microleucogranito(10).jpg

Quartz, Biotite, garnet and feldspar in a Leucogranite. PPL image, 2x (Field of view = 7mm)