| Other common minor constituents of eclogite include kyanite, orthopyroxene, rutile, amphibole, pyrite, and white mica. |
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| The inhalation of amphibole asbestos is now widely recognized as being highly dangerous to human health. |
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| In practice many basalts also contain easily visible crystals of feldspar, pyroxene, olivine, or amphibole. |
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| Extreme cases are found in mineral groups such as apatite, amphibole, pyroxene, feldspar, and tourmaline. |
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| The largest amphibole crystals are embedded in the rock matrix, whereas the smaller acicular crystals line the hollows. |
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| The presence of several amphibole minerals, such as tremolite, actinolite, anthophyllite, was confirmed. |
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| In keeping with their amphibole content, almost all the samples are metaluminous to slightly peraluminous. |
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| This is consistent with the fact that olivine is typically entrapped in pyroxene and amphibole crystals. |
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| The other two silicates are possibly an amphibole and a member of the smectite group. |
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| It is pale pink and has physical, optical, and crystallographic properties similar to those of the other monoclinic members of the amphibole group. |
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| The phenocrysts of rhyolite may include quartz, alkali feldspar, oligoclase feldspar, biotite, amphibole, or pyroxene. |
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| Find fact sheets on 26 products and their health implications, from candles to vermiculite insulation containing amphibole asbestos. |
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| The latter form by dehydration melting at less than 10-12 kbar leaving a residue of augite, orthopyroxene, plagioclase and varying amounts of amphibole. |
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| The structure of an amphibole is a double chain of silicate tetrahedral which makes it very strong and durable. |
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| Several small grains of amphibole were seen as inclusions in a plagioclase phenocryst, and one partial grain of resorbed amphibole also was noted. |
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| Most amphibole asbestos was mined as crocidolite and amosite from Precambrian banded ironstones in South Africa and, to a lesser extent, Western Australia. |
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| Associated with the fayalite are quartz, amphibole, and magnetite. |
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| At higher grades of regional metamorphism, the amphibole anthophyllite breaks down to form magnesium-iron orthopyroxenes. |
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| The structure ruptures around the stronger I beams, as shown in Figure 4B, producing the characteristic 56° and 124° amphibole cleavage angles. |
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| Iron-rich orthopyroxenes are found in metamorphosed iron formations in association with the amphibole grunerite. |
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| We know that the amphibole fibre, which unfortunately was used in the past, is dangerous and has been banned. |
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| Intermediate amphibole compositions do not exist between anthophyllite and the tremolite-actinolite series. |
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| Since then, numerous scientific studies have been published, which show that chrysotile is much less potent than amphibole asbestos. |
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| Chrysotile is part of the serpentine group whereas tremolite, amosite, crocidolite, actinolite and anthophyllite are part of the amphibole type. |
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| An assessment of risk with amphibole fibres has not been conducted because they have not been used for a long time. |
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| The best way to eliminate asbestos-related dis eases is to continue to ban all amphibole fibres. |
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| The amphibole fibres may remain in the lungs for periods up to a year or more. |
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| This false-colour image uses polarized light that turns amphibole crystals into bright colours. |
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| Minerals typical of the rocks of the epidote-amphibolite facies include biotite, almandite garnet, plagioclase, epidote, and amphibole. |
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| Though it easy to determine that it is an amphibole, it is very difficult to distinguish from other amphiboles. |
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| There is also concern about vermiculite insulation which may contain small amounts of amphibole asbestos, principally tremolite or actinolite. |
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| However, none of these extrapolations have taken into account the difference in potency of longer amphibole fibers compared to shorter fibers. |
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| Chloritized amphibole with associated apatite is the main ferromagnesian mineral phase in all three units. |
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| Trade unions and workers of the chrysotile industry, who possess a solid expertise in this area, rightly demand that all precautions should be taken when working where asbestos amphibole fibres might be released. |
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| Fine grained sedimentary rocks were transformed into hornfels and minerals such as amphibole, pyroxene. |
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| Within this granite are darker bands richer in iron because they contain the pyroxene mineral aegirine and the amphibole mineral riebeckite. |
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| Higher iron and magnesium tends to manifest as a darker groundmass, and also occasionally amphibole or pyroxene phenocrysts. |
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| Schlieren consists of biotite, amphibole, zircon, allanite, monazite, magnetite, and fluorite. |
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| The magma is responsible of the formation of skarns with garnet, pyroxene, amphibole and magnetite in the ore bodies, and of the presence of veins of dacite or dolerite within the host rocks. |
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| The amphibole asbestos has different physical and chemical properties from chrysotile, states a Natural Resources Canada report. |
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| This review assesses the risk of developing diffuse malignant mesothelioma of the pleura from exposure to chrysotile fibers and contracts it with the known risk of amphibole asbestos. |
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| Taken in context with the scientific literature available to date, these data provide the world with results that clearly support the difference, epidemiologically, between chrysotile and amphibole asbestos fibres. |
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| Included under this designation are minerals from the serpentine group, namely chrysotile, and from the amphibole group, which includes crocidolite, amosite, anthophyllite, actinolite and tremolite. |
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| For example, the boundary between the greenschist and amphibolite facies marks a transition from amphibole of actinolitic composition to hornblende and of a sodic plagioclase into a more calcic plagioclase. |
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| At somewhat higher temperatures, the rock would become an amphibolite, reflecting a mineralogy composed predominantly of the amphibole hornblende along with plagioclase and perhaps some garnet. |
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| Andesite or diorite minerals, such as andesine with either pyroxene or amphibole, crystallize next and are followed by orthoclase and quartz, which are the essential constituents of rhyolite or granite. |
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| New analyses of occupational epidemiologic studies for highly exposed workers show a substantially lower potency and suggest an empiric threshold for chrysotile compared with amphibole asbestos. |
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| According to the result of numerous studies, chrysotile fibres are far less hazardous than amphibole fibres, whose wide-spread use in the past has caused serious health problems when workers were exposed to them. |
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| In fact, he mocks the fact that many are interested in treating chrysotile fibres encapsulated in cement with the same fear as amphibole fibres released into the air. |
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| Regarding asbestos fibres, it was confirmed repeatedly that chrysotile displays low biopersistence, as opposed to the amphibole asbestos fibre types displaying exceedingly long biopersistence. |
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| Granite is composed of intergrown crystals of the minerals feldspar, quartz and amphibole that formed during the slow cooling of molten rock deep in the earth. |
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| Find out about the necessary precautions to take before working in areas that contain vermin, vermin droppings, mould, lead, asbestos, vermiculite insulation that may contain amphibole asbestos or other hazardous products. |
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| The most abundant silicate minerals on Earth's surface include quartz, feldspars, amphibole, mica, pyroxene and olivine. |
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| Andesite is an aphanitic and extrusive igneous rock composed of the Na-rich plagioclase, pyroxene and amphibole. |
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| Kyanite, garnet, monazite, and amphibole are common minerals, while apatite, anatase, titanite, corundum, pyroxene, and epidote are rare. |
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| Igneous brown amphibole is ubiquitous as rims around cumulus plagioclase, olivine and pyroxene, and locally forms interstitial grains. |
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| The rare earth mineralization, consisting of fergusonite, allanite, and zircon, occurs in amphibole bearing granitic pegmatites. |
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| Libby amphibole is a mixture of noncommercial amphiboles obtained from the vermiculite mine in Libby, Montana. |
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| Interstitial augite and pigeonite have in part been altered to amphibole and mica. |
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| Comparative long-term toxicity of Libby amphibole and amosite asbestos in rats after single or multiple intratracheal exposures. |
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| Most amphibole grains are zoned, with medium green actinolitic cores and dark blue-green hornblende rims, and newly formed hornblende is present in the matrix. |
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| The high water content of NE Pacific alkalic magmas suggests that one trace phase in the enriched mantle source is a hydrous phase, possibly phlogopite or amphibole. |
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| Two types of amphibole are present, an earlier generation of magnesio-hornblende with greenish brown-brown-tan pleochroism and later pale green-green actinolitic hornblende. |
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| Garnet developed in calcareous rocks as well as amphibole and pyroxene. |
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| Plagioclase is partly altered to saussurite and sericite, and pyroxene is variably altered to pale brown and pale green actinolitic amphibole, chlorite, and epidote. |
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| Rock sample 2074 taken from Gossan Ridge contains abundant alunite, tremolite, tourmaline, goethite, and quartz alteration of amphibole bearing-alkali rhyolite. |
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