What minerals make up amphibolite?
What minerals make up amphibolite?
The mineral composition of the amphibolites is simple and mostly contains hornblende and plagioclase, with variable amounts of anthophyllite, garnet, mica, quartz, and epidote. The rocks may originate from pelitic sediments, with amphibole (hornblende), plagioclase, and typically include green pyroxene.
Where can you find tremolite?
Where is Tremolite Found? Outside of the United States, tremolite was primarily mined in South Africa and India. In South Africa, it was extensively mined in the beginning of the 20th century, but it became secondary to the mining of amosite and crocidolite.
What is the chemical composition of hornblende?
hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure. Hornblende’s generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 (OH)2.
What is the chemical composition of amphibole?
Physical Properties for Hornblende
| Chemical Classification | Silicate |
|---|---|
| Diagnostic Properties | Cleavage, color, elongate habit |
| Chemical Composition | (Ca,Na)2–3(Mg,Fe,Al)5(Al,Si)8O22(OH,F)2 |
| Crystal System | Monoclinic |
| Uses | Very little industrial use |
What is the chemical composition of amphibolite?
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, wollastonite, andalusite, staurolite, kyanite, and sillimanite.
What is tremolite geology?
Tremolite is a member of the amphibole group of silicate minerals with composition: Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2. Tremolite forms by metamorphism of sediments rich in dolomite and quartz. Tremolite forms a series with actinolite and ferro-actinolite.
How bad is tremolite?
Disease of the lung parenchyma including scarring and pulmonary fibrosis may range from mild to severe. Finally, exposure may cause cancer, primarily lung cancer and mesothelioma (a unique form of cancer of the pleura).
What is the composition of Hypersthene?
Hypersthene is a common rock-forming inosilicate mineral belonging to the group of orthorhombic pyroxenes. Its chemical formula is (Mg,Fe)SiO 3. It is found in igneous and some metamorphic rocks as well as in stony and iron meteorites.
What is hornblende mineral?
Hornblende is a complex inosilicate series of minerals (ferrohornblende – magnesiohornblende). It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. The general formula is (Ca,Na) 2-3(Mg,Fe,Al) 5(Al,Si) 😯 22(OH,F) 2.
Is tremolite a petrogenic mineral?
Significant petrogenic minerals of amphibole group. The color of amphiboles depends on their chemistry, particularly of iron. Tremolite, [Ca 2 (Mg) 5 (OH) 2 Si 8 O 22 ], does not contain iron or it has only a very small portion, usually white color.
What is the composition of basalt in geochemistry?
Geochemistry. Basalt generally has a composition of 45–55 wt% SiO 2, 2–6 wt% total alkalis, 0.5–2.0 wt% TiO2, 5–14 wt% FeO and 14 wt% or more Al2O3. Contents of CaO are commonly near 10 wt%, those of MgO commonly in the range 5 to 12 wt%.
What is the difference between actinolite and tremolite?
Tremolite and Actinolite are two very similar minerals that form a series with each other and essentially share the same chemical formula. Tremolite has a greater presence of magnesium over iron, whereas Actinolite has a greater presence of iron over magnesium.
What is the high temperature crystal chemistry of tremolite?
Sueno S , Cameron M , Papike J J , Prewitt C T , American Mineralogist , 58 (1973) p.649-664, The high temperature crystal chemistry of tremolite, T = 400 C Brown, Colorless, Gray, White, Light green.
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