Eufodite Gabbro

"eufodite" Gabbros (old term for coarse-grained gabbros) are very coarse-grained gabbroic rocks. they contain plagioclase (labradorite) commonly altered in Saussurite and a Diallage pyroxene, commonly altered in chlorite or zoisite. The Type locality for this type of Gabbro is the south Tuscany region in Italy.

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Gabbro "Eufodite" from Italy




Bibliography



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


Photo
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. XPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. XPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. the two crystals with high interference colors are Epidote. XPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and clinopyroxene crystals in a Eufodite Gabbro. PPL image, 2x (Field of view = 7mm)
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Plagioclase alterd by Sericite and Epidote. XPL image, 2x (Field of view = 7mm)
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Fibrous amphiboles after Pyroxene. XPL image, 10x (Field of view = 2mm)
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Fibrous amphiboles after Pyroxene. XPL image, 10x (Field of view = 2mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Deformed Pyroxene crystal. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Deformed Pyroxene crystal. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. XPL image, 2x (Field of view = 7mm)
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Pyroxene crystals and altered plagioclase. Eufodite Gabbro from Passo del Bracco, Liguria, Italy. PPL image, 2x (Field of view = 7mm)