Amphibolite (/ æmˈfɪbəlaɪt /) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense, with a weakly foliated or schistose (flaky) structure.

2023年4月23日 · Amphibolite is a coarse-grained metamorphic rock, predominantly composed of mineral amphibole and plagioclase feldspar. It can also contain minor amounts of other metamorphic minerals such as biotite, epidote, garnet, …

How Does Amphibolite Form? Amphibolite is a rock of convergent plate boundaries where heat and pressure cause regional metamorphism. It can be produced through the metamorphism of mafic igneous rocks such as basalt and gabbro, or from the metamorphism of clay-rich sedimentary rocks such as marl or graywacke. The metamorphism sometimes flattens ...

Amphibolites are the most common metamorphic rocks formed by regional metamorphism under high pressure and high temperature (Fig. 7.5). The amphibolites usually occur along with the mica schist and gneiss. The development of schistosity is considerably less pronounced in amphibolites than those in the amphibole schists.

Amphibolite, a rock composed largely or dominantly of minerals of the amphibole group. The term has been applied to rocks of either igneous or metamorphic origin. In igneous rocks, the term hornblendite is more common and restrictive; hornblende is the most common amphibole and is …

Amphibolite is a common metamorphic rock. It is made of amphiboles (usually hornblende) and plagioclase. Most samples have a relatively simple composition: hornblende + plagioclase. Garnet (almandine), pyroxene, biotite, titanite, magnetite, epidote, …

There are four main ways by which amphibolite may be formed. Recrystallization of basic igneous rock, whether intrusive, extrusive lava or basaltic tuff, gives rise to ortho-amphibolites (metabasites).

Amphibolite is a gneissose or granofelsic metamorphic rock mainly consisting of green, brown or black amphibole and plagioclase (including albite), which combined form ≥75% of the rock and both of which are present as major constituents; the amphibole constitutes ≥50% of the total mafic constituents and is present in an amount of ≥30%.

2024年7月1日 · To identify the peak conditions of rock formation and the age of metamorphism of the Kharbei amphibolite–gneiss complex, we studied the section of the Khanmeikhoi Formation in the central part of the complex (Bolshoi Kharbei River, downstream from the mouth of Parikvasshor Creek), where it apparently underwent maximum thermodynamic changes (Fig....

Amphibolite is a coarse-grained metamorphic rock which forms by metamorphism of mafic igneous rocks like basalt and gabbro or from the metamorphism of clay-rich sedimentary rocks like marl or graywacke. Along with Amphibolite Formation, also learn about Amphibolite composition and transformation in the next section.