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Related to hornblende: tremolite, augite, biotite
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  • noun

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a green to black mineral of the amphibole group

References in periodicals archive ?
Modal composition is mainly syenogranite to monzogranite, with quartz, plagioclase, and potassium feldspar present in approximately equal amounts, and biotite [+ or -] hornblende forming approximately 6 to 8%.
It comprises undeformed to weakly deformed gabbro, with local igneous layering and pegmatitic patches, as well as hornblende gabbro.
Mineralization occurs as 2-4% fine-grained disseminated chalcopyrite and pyrrhotite hosted by hornblende leucogabbro and pyroxenite.
From 823m to the current depth of 890m a weakly altered and mineralized, late plagioclase hornblende diorite porphyry was intersected.
Regarding the geology of Saint John, Emmons (1836) limited his comments to a few notes on the "greywacke slate, highly inclined" on which the city stood, and the abundant boulders of "granite, gneiss, hornblende and a conglomerate" that were strewn along the coast (p.
The licence area is underlain chiefly by Upper Birimian greenstones and intruded by small stocks and dykes of hornblende granodiorite.
Jurassic age) volcaniclastic and sedimentary rocks of the Inzana Lake Formation intruded by epizonal plagioclase (crowded) and/or hornblende porphyries and monzodiorite dykes and stocks.
This is manifested by transitional changes from greenschists to hornblende schists and subsequently to amphibolites.
Non-metallic minerals are apatite, quartz, hornblende, actinolite, epidote, chlorite, Saussure, pomegranate.
Meantime gd intrusive bodies with Hornblende granodiorite to monzonite permeated between meta-gabbro and limestone.
The skarn is divided into five subgroups of which the most important one is svartmalm, or "black ore" consisting of abundant magnetite and calc-silicate skarn minerals (garnet, diopside, tremolite, epidote, hornblende.
Throughout the Grenville, hornblende and muscovite [sup.
Population 2 amphibole is best classified as hornblende or actinolitic hornblende with [greater than or equal to] 1 Al per unit formula.
Another manifestation of fungal mineral dissolution could be the formation of smooth tunnels of constant diameter in feldspar and hornblende grains (Hoffland et al.
15) Schist is formed at high temperatures and high pressures by dynamic metamorphism that aligns the grains of mica, hornblende and other flat or elongated minerals into thin layers, or foliation.