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Перевод: amphibole

[существительное]
амфибол

Тезаурус:

1. Typical minerals Feldspar Quartz Mica Amphibole
2. While quartz gives grey and white interference colours, the bright colours of Plate 6.1b are produced by an amphibole mineral (pale colour to yellow to red) and the black and white stripey pattern by the feldspar mineral plagioclase.
3. The diopside, too, is poorer in Al and Cr than most lherzolite diopsides, and the amphibole replacing orthopyroxene is potassic, sodic richterite.
4. Typical minerals Feldspar Amphibole Pyroxene Mica
5. The French mineralogist Alexis Damour distinguished two main groups, the amphibole rocks represented by nephrite and the pyroxenes which included jadeite and the little used chloromelanite.
6. Group I, centred on the type-locality at Kimberley, has proved an important source for a wide variety of upper-mantle-derived, kimberlite-transported xenoliths ranging from peridotites and dunites, through pyroxenites and eclogites, to amphibole and phlogopite-bearing metasomites and discrete nodules (megacrysts).
7. The wall-rock olivine at the vein margins is unaltered, but orthopyroxene is partially replaced by a fine symplectite of diopside plus phlogopite, and in some places by K-rich amphibole.
8. They consist mostly of quartz and feldspars, with a little mica or amphibole.
9. The lowest temperature gradient estimated from analysis of obducted lower crust is 20C km -1 ; even for this conservative estimate, temperatures at the bottom of the crust (50km) would have been greater than 1,000C-sufficient to produce trondhjemitic melts from hydrated basaltic compositions with residues of amphibole, garnet and clinopyroxene and little or no plagioclase.