hornblendite

A hornblendite is an ultramafic igneous rock dominated by hornblende. It is different from an amphibolite which is a amphibole and plagioclase dominated metamorphic rock. Horblendite is a rare rock most commonly associated with diorite, granite, gabbro and peridotite. They form as cumulates by settling of early crystallised hornblende in hydrous magmas, other related rocks such as hornblende gabbro and hornblende peridotite also form by accumulation. Hornblendites are also associated with Precambrian tonalite-trondhjemite-granodiorite series rocks.

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Ol-Px-Hbl Diagram for Ultramafic rocks. hornblendite field in blue




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Hornblendite samples




bibliography



• Eric A.K.Middlemost (1985): Magmas and Magmatic Rocks. Longman, London
• Ron H. Vernon (2004): A pratical guide to rock microstructure. Cambridge editore
• K.G.Cox, J.D.Bell & R.J Pankhurst (1979): The interpretetion of igneous rocks. George Allen&Unwin editori.
• David Shelley (1983): Igneous and metamorphic rocks under the microscope. Campman & Hall editori


Foto
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. XPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>
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Hornblende crystals and interstitial plagioclase in a hornblendite rock. PPL image, 2x (Field of view = 7mm)/td>