The Mesoarchean Rommaeno TTG-amphibolite complex (3.2 Ga) of the Norrbotten Province is located in Enontekiö municipality, in the Käsivarsi area in Finnish Lapland, and outcrops in Sweden and Norway (Karinen et al., 2015).These mostly unexplored areas are located in the logistically challenging remote wilderness of Finnish Lapland; therefore, detailed descriptions of the total … Amphibolite is one of the important type of rocks. Fig. Around the deposit, peak metamorphic conditions of 6 ± 0.5 kbar and 650 ± 50 °C at ca. 25.2. The dominant lithology is a heterogeneous amphibolite composed of cummingtonite + plagioclase + biotite ± quartz ± garnet ± anthophyllite (Figs. Andrew Alden. Table 1 This lithological unit exhibits important variations in mineralogical proportions ranging from garnet-biotite schist to cummingtonite–plagioclase amphibolite. important role in the metamorphic minerals that were stable • The classic area of burial metamorphism thus has a strong ... amphibolite facies, and the pyroxene hornfels and sanidinite facies correlate with the granulite facies 26. 16.1 and 16.2A). All Metamorphic Rocks have similar properties and formation process. 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%. Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase. To determine the chemical composition of amphibole bearing metabasites in the study areaelectron, micro- probe analysis were done onthis mineralization in greenschist, epidote amphibolite and amphibolite. Amphibolite is available in black, brown, green, grey colors. Amphibolite comes under Igneous Rocks. It is sited in Devonian sequences in a high-grade metamorphic terrane that includes an extensional metamorphic core complex. dehydration melting of amphibolite: the importance of quartz to reaction progress T. H. D. HARTEL* AND D. R. M. PATTISON Department of Geology and Geophysics, University of Calgary, Calgary, Alberta, Canada T2N 1N4 ABSTRACT Migmatitic,granulite-grade mafic gneissesmake upa significantpartofthe KapuskasingStructural Zone (KSZ), Ontario. and that these fluids played an important role in the metamorphic minerals that were stable l The classic area of burial metamorphism thus has a strong component of hydrothermal metamorphism as well Mafic Assemblages at Low Grades lThe greenschist, amphibolite and granulite facies constitute the most common facies series of regional metamorphism Amphibolite forms when basaltic rock is subjected to higher temperatures between 550 C and 750 C) and slightly greater pressure range than that which yields greenschist. Temperature-pressure diagram showing the The amphibolite strength typically rises with the increase in confining pressure, and a power function Mohr criterion in terms of the principal stresses was found to fit test results reasonably well. If we have to define Amphibolite in general, Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase. The plagioclases in the greenschist is pure albite (An 3.29 - 3.6), and in the epidote amphibolite is oligoclase (An 19.5 - 24.2), while in the amphibolites is oligoclase (An 16.9 - 26.6). (a) PPL; (b) XPL. Microscopic image of amphibolite, plagioclase with Carlsbad-albite twins and hornblende in this image can be seen. The amphibole in amphibolite is a member of the calcic group and this amphibole is Magnesio-Hornblende type. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The Danba gold deposit is located in a poorly-documented gold province on the north-western margin of the Yangtze Craton. 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