kyanite वाक्य
उदाहरण वाक्य
मोबाइल
- The mineral occurs as exsolution lamellae and particles in rutile, coexisting with kyanite, sillimanite, and tourmaline in a highly metamorphosed gneiss.
- Andalusite is stable at low pressure, kyanite is stable at high pressure but relatively low temperature and sillimanite is stable at high temperature.
- Over the years, diamonds have yielded blemishes of eclogite and kyanite, metamorphic rocks thought to have been formed at great depths and heats.
- The aluminosilicates are a group of three minerals kyanite, andalusite, and sillimanite which share the chemical formula Al 2 SiO 5.
- With increasing temperature and pressure garnet appears, and then kyanite ( at relatively high pressure ) or sillimanite ( at relatively high temperature ).
- Besides coal, resources such as slate, kyanite, sand, and gravel are mined, with an annual value over $ 2 billion.
- Therefore, kyanite is often the preferred material, as it contributes both mechanical strength and, in amounts up to 20 %, significantly reduces thermal expansion.
- Felsic rocks in these terranes contain sillimanite, kyanite, coesite, orthoclase and pyroxene, and are rare, peculiar rocks formed by an unusual tectonic event.
- The High Himalayan Crystalline units ( HHC ) are mainly composed of kyanite-to sillimanite-grade gneisses intruded by High Himalayan leucogranites at structurally higher levels.
- Kyanite has been used as a semiprecious gemstone, which may display cat's eye chatoyancy, though this use is limited by its anisotropism and perfect cleavage.
- Among these may be mentioned cordierite and sillimanite gneisses, andalusite and kyanite mica-schists, and those schistose calcite-silicate rocks that are known as cipolins.
- Where the schists of sedimentary origin have been pierced by these igneous intrusions, they are charged with contact minerals such as sillimanite, cordierite, kyanite and andalusite.
- Accessory minerals include kyanite, rutile, quartz, lawsonite, coesite, amphibole, phengite, paragonite, zoisite, dolomite, corundum, and, rarely, diamond.
- This sequence can be divided into four main units, as Kyanite-Sillimanite gneiss, pyroxenic marble and gneiss, banded gneiss, and augen gneiss in the ascending order.
- For example, kyanite, Al 2 SiO 5 forms from the metamorphism of aluminium-rich shales; it would not likely occur in aluminium-poor rock, such quartzite.
- At temperatures above 1100 �C kyanite vitreous silica via the following reaction : 3 ( Al 2 O 3 �SiO 2 ) ?! 3Al 2 O 3 ?SiO 2 + SiO 2.
- Henry's Knob, a mountain west of Clover is the site of a former open-pit mining operation for what was formerly the world's largest deposit of kyanite.
- Gedrite occurs in contact and medium to high grade metamorphic rocks in association with garnet, cordierite, anthophyllite, cummingtonite, sapphirine, sillimanite, kyanite, quartz, staurolite and biotite.
- Cottage industries are forest-based ( timber, firewood, charcoal, bamboo products ) and mineral-based ( asbestos, coal, chromite, iron ore, mica, and kyanite ).
- In central Nepal, the metamorphic grade increases from low ( chlorite + biotite ) to medium ( biotite + garnet + kyanite + staurolite ) towards the MCT over a north-south distance.
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