斑晶是指斑状结构中的较大的矿物晶体,是一种嵌进细粒或玻璃质火成岩中比较大的晶体。结晶通常较基质为早,故常为自形晶。由于结晶条件经常变化,斑晶形成后,往往遭受熔蚀、分解、破碎或转变为另一些矿物。
n. phenocryst
... porphyritic breccia 斑状角砾岩 porphyritic crystal 斑晶 porphyritic 斑状 ...
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在有些高级矿石内,斑晶紧连着假晶。
In some high-grade ores, phenocrysts adhere intimately to the pseudomorphs.
辉石为超基性岩和基性岩中最主要的矿物,另外在安山岩中常以斑晶出现。
Pyroxene is ultrabasic rocks and basic rocks in the main mineral, also in the andesite often appear as phenocrysts.
当钾长石在斑状、似斑状岩石中构成斑晶时,常呈板状、板柱状自形的晶体。
When the potassium feldspar phenocrysts in porphyritic porphyritic rocks, like in form, often with a plate, plate columnar euhedral crystals.
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