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Translations for „pyroxenes“ in the English » Arabic Dictionary (Go to Arabic » English)

pyroxenes MIN

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English
It was first described in 1913 and named for the mineral group, pyroxenes, and is known as the manganese member.
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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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Minerals that often display parting include the pyroxenes, hematite, magnetite, and corundum.
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Accessory minerals like pyroxenes provide insight to the history of the magma.
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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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They are contrasted by light green, 2 to 10 millimeter-sized rectangular to oval areas completely composed of bastitized pyroxenes.
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With high alkalis, soda-bearing pyroxenes and amphiboles may be present.
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If on the other hand, the rock contains more than 90% pyroxenes (often both are present), it is termed pyroxenite.
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They are classified (see diagram below) into clinopyroxenites, orthopyroxenites, and the websterites which contain both pyroxenes.
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