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- Diorite abstract "Diorite /ˈdaɪəraɪt/ is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene. It may contain small amounts of quartz, microcline, and olivine. Zircon, apatite, sphene, magnetite, ilmenite, and sulfides occur as accessory minerals. It can also be black or bluish-grey, and frequently has a greenish cast. Varieties deficient in hornblende and other dark minerals are called leucodiorite. When olivine and more iron-rich augite are present, the rock grades into ferrodiorite, which is transitional to gabbro. The presence of significant quartz makes the rock type quartz-diorite (>5% quartz) or tonalite (>20% quartz), and if orthoclase (potassium feldspar) is present at greater than ten percent the rock type grades into monzodiorite or granodiorite. Diorite has a medium grain size texture, occasionally with porphyry. The phaneritic salt and pepper texture common to diorite is due to random distribution of somewhat medium sized grains of the white albite and black or nearly black color amphibole and pyroxene crystals, with minor glints of biotite. The common silicate mineral assemblage includes mostly sodium rich plagioclase with calcium plagioclase, amphibole, pyroxene, and biotite. Minor amounts of muscovite and quartz, and oxides such as magnetite and ilmenite may also be present. A dioritic rock containing feldspathoid mineral/s while absent of quartz is termed foid-bearing or foid diorite according to content. Diorite may also be porphyritic. Orbicular diorite shows several alternating concentric growth bands of plagioclase and amphibole surrounding a nucleus within a diorite porphyry matrix. Diorites may be associated with either granite or gabbro intrusions, into which they may subtly merge. Diorite results from partial melting of a mafic rock above a subduction zone. It is commonly produced in volcanic arcs, and in cordilleran mountain building such as in the Andes Mountains as large batholiths. The extrusive volcanic equivalent rock type is andesite.".
- Diorite thumbnail QAPFdiorite.gif?width=300.
- Diorite wikiPageID "443366".
- Diorite wikiPageRevisionID "606462664".
- Diorite hasPhotoCollection Diorite.
- Diorite subject Category:Granitic_rocks.
- Diorite subject Category:Intermediate_rocks.
- Diorite subject Category:Plutonic_rocks.
- Diorite comment "Diorite /ˈdaɪəraɪt/ is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene. It may contain small amounts of quartz, microcline, and olivine. Zircon, apatite, sphene, magnetite, ilmenite, and sulfides occur as accessory minerals. It can also be black or bluish-grey, and frequently has a greenish cast. Varieties deficient in hornblende and other dark minerals are called leucodiorite.".
- Diorite label "Dioriet".
- Diorite label "Diorit".
- Diorite label "Diorita".
- Diorite label "Diorite".
- Diorite label "Diorite".
- Diorite label "Diorite".
- Diorite label "Diorito".
- Diorite label "Dioryt".
- Diorite label "Диорит".
- Diorite label "حجر الديوريت".
- Diorite label "閃緑岩".
- Diorite label "閃長岩".
- Diorite sameAs Diorit.
- Diorite sameAs Diorit.
- Diorite sameAs Diorita.
- Diorite sameAs Diorita.
- Diorite sameAs Diorite.
- Diorite sameAs Diorit.
- Diorite sameAs Diorite.
- Diorite sameAs 閃緑岩.
- Diorite sameAs 섬록암.
- Diorite sameAs Dioriet.
- Diorite sameAs Dioryt.
- Diorite sameAs Diorito.
- Diorite sameAs m.02943b.
- Diorite sameAs Q187408.
- Diorite sameAs Q187408.
- Diorite wasDerivedFrom Diorite?oldid=606462664.
- Diorite depiction QAPFdiorite.gif.
- Diorite isPrimaryTopicOf Diorite.
