Traduções para „pyroxenes“ no dicionário Inglês » Polaco

pyroxenes SUBST

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pyroxenes pl QUÍM

pirokseny fpl

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Accessory minerals like pyroxenes provide insight to the history of the magma.

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The host rock is an anorthosite containing over 90% labradorite crystals and/or gabbroic anorthosites richer in amphibolites and/or pyroxenes.

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Both low-calcium (ortho-) and high-calcium (clino-) pyroxenes are present, with the high-calcium varieties associated with younger volcanic shields and the low-calcium forms (enstatite) more common in the old highland terrain.

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Pairs of pyroxenes -- both augite plus omphacite and omphacite plus jadeite -- appear to have existed in equilibrium at low temperatures.

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These phenocrysts are pyroxenes (augite and pigeonite), plagioclases, opaque crystals such as titanomagnetite or ilmenite, and occasionally some olivine.

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The pyroxenes have a variable composition lying between enstatite, ferrosilite and wollastonite.

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It commonly occurs in association with orthoclase, sanidine, labradorite, olivine, leucite, amphiboles and other pyroxenes.

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Quartz is usually present in minor quantities in acidic pozzolanas, while pyroxenes and/or olivine phenocrysts are often found in more basic materials.

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In chemical composition and general characteristics they are similar to the pyroxenes.

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The pyroxenes cleave in two directions at approximately 90, whereas the amphiboles distinctively cleave in two directions separated by approximately 120 and 60.

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