条带状构造(banded structure)一般用于描述某些变质岩或热液成因、岩浆成因的矿石。 在变质岩中,指各种矿物成分分布不均匀,以石英、长石、方解石等粒状矿物为主的浅色条带和以黑云母、角闪石、磁铁矿等为主的暗色条带,各以一定的宽度成互层状出现,形成颜色不同的条带状构造。若条带的宽度变化较大,呈不连续分布,则称为条痕状构造(streaky structure)。 不同成分,不同粒径或不同含量的矿物集合体呈带状交替、重复出现的一种矿石构造。
n. banding
misc. banded structure
矿石为花岗伟晶结构,似文象结构和块状、条带状构造。
Ores are of pegmatite granites texture, graphic and massive, banded structure.
根据花岗闪长岩体条带状分布的特征,可反映岩浆上升时该区正处于北东向拉张的构造环境中。
Taking the stripped distribution of the granodiorite into consideration, a northeast tensional tectonic environment is suggested during the emplacement of the magma.
岩石学研究表明条带状矿石属于糜棱岩,具有丰富的塑性变形显微构造特征。
The petrological study shows that banded ore belongs to mylonite, which has abundant microstructure feature of plastic deformation.
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