| 词汇 | staurolite |
| 释义 | BETA Examples of staurolitestaurolite isn’t in the Cambridge Dictionary yet. You can help! Chloritoid-in and staurolite-out isograds are well constrained independently of chemical system. Thus, the two different garnet compositions reflect different bulk rock compositions, which result in different growth successions of garnet and staurolite. Structural formulae were calculated on the basis of 12 oxygens for garnet, 8 for plagioclase, 22 for biotite and muscovite and 27 for staurolite. In contrast to the strongly cor roded andalusite and staurolite grains, the garnet has retained its euhedral shape and is only slightly cor roded. Some garnet, staurolite and kyanite porphyroblasts are fractured, stretched and show asymmetric strain fringes, made of quartz, biotite and chlorite. Muscovite grains abut staurolite crystals, but are not present as inclusions. Garnet and staurolite-bearing mica schists and gneisses are suggested to have been the major lithologies. Other parageneses in metasedimentary enclaves include biotite-kyanite-staurolite, conspicuously lacking chloritoid in the matrix. Photomicrographs of a garnet-staurolite-andalusite- cordierite schist (assemblage 5c). Staurolite is absent, muscovite occurs as traces, oligoclase is not zoned. In handsamples, macroscopically visible staurolite crystals are of prismatic shape. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Orthoclase, staurolite, pyrite, and fluorite often show penetration twinning. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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