Les gisements de Tsavorite en Afriq

Les gisements de Tsavorite en Afrique de l'Est sont hébergés par des roches métamorphiques de la Mozambique. Les protolithes de ces roches ont été déposés dans un milieu marin peu profond et par la suite métamorphisées durant l'Orogenèse de l'Afrique de l'Est entre 650 et 550 millions d'années avant(Feneyrol et coll., 2013). Des schistes bitumineux noirs qui ont été déposés dans les bassins maritimes ont été métamorphisées pour former les gneiss de graphite. Les schistes noirs sont généralement enrichit en Vanadium, le colorant (parfois avec Chrome) en Tsavorite. Les roches du socle se composent principalement de gneiss qui sont intercalés avec du mica, cyanite et schistes de graphite, ainsi que des moindres quantités de quartzites, de roches de silicates et de marbres. La minéralsation de Tsavorite est hébergée par les gneiss de graphite, qui sont généralement interstratifiées avec des schistes et des bandes de marbre ayant de 10 cm à 2 m d'épaisseur. Les gneiss graphiteux composent de quartz, feldspaths alcalins, biotite et graphite; la sillimanite, épidote, allanite, titanite, zircon, apatite, magnétite et hématite sont également des minéraux accessoires souvent piégés dans la Tsavorite.

結果 (英文) 1:

Deposits of Tsavorite in East Africa are hosted by metamorphic rocks of the Mozambique. The protoliths of these rocks were deposited in a marine environment shallow and subsequently metamorphosed during the East African orogeny between 650 and 550 million years before (Sagad et al., 2013). Shale oil blacks who were deposited in the Sea basins have been metamorphosed to form graphite gneisses. Black Shales are usually enriched with Vanadium, the dye (sometimes with chromium) in Tsavorite. The basement rocks consist mainly of gneisses which are interbedded with mica, kyanite and Shales of graphite, as well as lesser amounts of quartzite, silicates and marble rocks. The mineralsation of Tsavorite is hosted by gneisses of graphite, which are commonly interbedded with Shales and the bands of marble with 10 cm to 2 m thick. Graphitic gneiss composed of quartz, alkali feldspar, biotite, and graphite; sillimanite, epidote, allanite, titanite, zircon, apatite, magnetite and hematite are also accessory minerals often trapped in the Tsavorite.

結果 (英文) 2:

The Tsavorite deposits in East Africa are hosted by metamorphic rocks of Mozambique. The protolith of these rocks were deposited in a shallow marine environment and subsequently metamorphosed during the orogeny of East Africa between 650 and 550 million years ago (Feneyrol et al., 2013). Black oil shales that were deposited in the sea basins were metamorphosed to form graphite gneiss. The black shales are generally enriched in Vanadium, the dye (sometimes with Chrome) in Tsavorite. The basement rocks consist mainly of gneiss which are interspersed with mica, kyanite and graphite schists and quartzites lesser amounts of silicate rocks and marbles. The minéralsation of Tsavorite is hosted by graphite gneisses that are generally interbedded with shales and marble strips having 10 cm to 2 m thick. Graphitic gneisses consist of quartz, feldspars alkaline biotite and graphite; sillimanite, epidote, allanite, titanite, zircon, apatite, magnetite and hematite are also often trapped accessory minerals in the Tsavorite.

結果 (英文) 3:

The deposits of Tsavorite in East Africa are hosted by metamorphic rocks of the Mozambique. The protolithes of these rocks were deposited in a marine environment shallow and subsequently metamorphisees during orogenesis of East Africa between 650 and 550 million years ago before(Feneyrol et al. , 2013).The shales blacks who have been deposited in the maritime basins have been metamorphisees to train the gneiss of graphite. The black shales are generally enriches in Vanadium, the dye (sometimes with Chrome) in Tsavorite. The rocks of the cradle is composed mainly of gneiss which are interspersed with the mica, kyanite and shale of graphite,As well as smaller quantities of quartzite, rocks of silicates and marbles. The mineralsation of Tsavorite is hosted by the gneiss of graphite, which are typically interbedded coal seams with shales and bands of marble having 10 cm to 2 m thick. The gneiss graphiteux composed of quartz, alkali feldspars, biotite-graphite; the sillimanite, epidote, allanite) radioactivity causes,Titanite, zircon, apatite, magnetite and hematite are also minerals accessories often trapped in the Tsavorite.