hornblende


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Related to hornblende: tremolite, augite, biotite

horn·blende

 (hôrn′blĕnd′)
n.
The most common mineral in the amphibole group, CaNa(Mg,Fe)4(Al,Fe,Ti)3Si6O22(OH,F)2 commonly green to black, found in igneous and metamorphic rocks.

[German : Horn, horn (from Middle High German, from Old High German; see ker- in Indo-European roots) + Blende, blende; see blende.]

hornblende

(ˈhɔːnˌblɛnd)
n
(Minerals) a black or greenish-black mineral of the amphibole group, found in igneous and metamorphic rocks. Composition: calcium magnesium iron sodium aluminium aluminosilicate. General formula: (Ca,Na)2.3(Mg,Fe,Al)5Si6(Si,Al)2O22(OH)2
[C18: from German Horn horn + blende]
ˌhornˈblendic adj

horn•blende

(ˈhɔrnˌblɛnd)

n.
a dark green to black mineral of the amphibole group, containing calcium, magnesium, iron, and aluminosilicates.
[1760–70; < German; see horn, blende]
horn•blen′dic, adj.

horn·blende

(hôrn′blĕnd′)
A common, green to black mineral found in many metamorphic and igneous rocks. It is composed of iron, calcium, magnesium, and other metals.

hornblende

A variety of amphibole.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hornblende - a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron
amphibole - a mineral or mineral variety belonging to the amphibole group
amphibole group - a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum
Translations
References in periodicals archive ?
The initial water supply was from a Meinzer Category 5 spring discharging at 200 to 300 Lpm, from a heavily fractured, granular, hornblende granodiorite exhibiting slickensides.
Numerous large (4-5 mm) hornblende crystals and 3 mm long flakes of brown biotite are aligned with each other, which indicates deformation along with magmatic crystallization.
7 [+ or -] 3 Ma reported for hornblende from the Pocomoonshine Gabbro-Diorite (West et al.
A tectonic environment with hot asthenosphere approaching a fertile crust, coupled with ongoing extension in a back-arc setting, is ideal for generating high melt fractions by dehydration melting if muscovite or biotite or hornblende are present in the source (Thompson 1999).
There is no recorded exploration work on the property but a limited prospecting program by the vendor during 1999 located outcrops of hornblende pyroxenite, leucogabbro and hornblende melagabbronorite associated with this magnetic high.
Abbreviations (after Kretz,1983): am = amphibole, bt = biotite, car = carbonate, chl = chlorite, cpx = clinopyroxene, cr = chromite, ep = epidote, hbl = hornblende, ol = olivine, opx = orthopyroxene, pl = plagioclase, qtz = quartz, srp = serpentine, tlc = talc, tr = tremolite, Note: Mineralogy of ultramafic rocks in normal font, mafic rocks in italics indicated with #.
The Pt-Pd-Au mineralization at the Stinger Zone is hosted by pyroxenite and hornblende leucogabbro in what appears to be, on the basis of limited available outcrop, a heterolithic megabreccia.
From 495m to end of hole at 500m a weakly altered and mineralized, late plagioclase hornblende diorite porphyry was intersected.
Mineralisation occurs as 2-4% fine-grained disseminated chalcopyrite and pyrrhotite hosted by hornblende leucogabbro and pyroxenite.
biotite became a liquidus phase at the expense of hornblende in the presence of evolving melt at lower temperature (see Naney 1983), or fractionation removed amphibole from the dyke-forming magma.
The Horse-Ivaal-Trukai deposit, the most significant porphyry system at present, is hosted by a north-west trending biotite hornblende diorite to quartz diorite intrusive referred to as the Horse Microdiorite.