is the name given to a metamorphic rock consisting mainly of amphibole , especially the species
hornblende and actinolite .
Kaynak: Amphibolitedate March 2013 It has a preponderance of lamellar (flat, planar) mineral s such as mica s, chlorite , talc ,
hornblende , graphite , and
Kaynak: SchistExample:
hornblende-phyric andesite, if
hornblende is the principal accessory mineral. Andesite can be considered as the extrusive
Kaynak: Andesiteintermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine ), biotite ,
hornblende , and/or pyroxene .
Kaynak: DioriteAmphiboles are minerals of either igneous or metamorphic origin; in the former case occurring as constituents (
hornblende ) of igneous
Kaynak: AmphiboleHornblendite is a plutonic rock consisting mainly of the amphibole
hornblende . rocks are rare and when
hornblende is the dominant mineral
Kaynak: HornblenditeThe endmember
hornblende tschermakite (Ca 2(Mg ,Fe 2+)3 Al 2(Si 6 Al 2)O 22(O H )2) is a calcium rich monoclinic amphibole mineral
Kaynak: TschermakiteRapakivi granite is a
hornblende -biotite granite containing large rounded crystals of orthoclase mantled with oligoclase .
Kaynak: Rapakivi graniteMagnesiohastingsite is a calcium -containing amphibole and a member of the
hornblende group. It is an inosilicate (chain silicate) with
Kaynak: MagnesiohastingsiteScapolite-
hornblende rocks: In Norway scapolite-
hornblende rocks have long been known at Ødegården and other localities. brownish
hornblende.
Kaynak: Scapolite55% alkali feldspar, 15–20% plagioclase , 15–20% quartz , 5–8% biotite , 3–5%
hornblende , and accessory magnetite (Evans and Green, 2003).
Kaynak: Syenogranitethe hornblendite of Gran, in Norway, which contains only
hornblende, has the same composition as some of the camptonites of the same
Kaynak: GeochemistryIt usually contains abundant biotite mica and
hornblende , giving it a darker appearance than true granite. and
hornblende may appear as
Kaynak: Granodioritecomposition Potassium feldspar, plagioclase feldspar, and quartz; differing amounts of muscovite , biotite, and
hornblende -type amphiboles.
Kaynak: Granite