feldspar

1.The ore-hunting indicator is of calcite-potassium feldspar veins containing pyritohedron pyrite.

直接找标志为含五角十二面体方解钾长。

2.The middle oil-member is characterized by medium-sized sandstone and pebbled sandstone, with fair sorting and subangular sphaericity.Rock types mainly were feldspar debris sandstone.

组主要沉积砂岩和含砾砂岩，粒度整体较粗，分选性较好，磨圆度以次棱角状为主，岩类型为长岩屑砂岩。

3.Therefore, the albitization of plagioclase is shown in the early stage of diagenesis and albitization of potash feldspar appears only in the late stage of diagenesis.

因此，斜长的钠长化可见于成岩早期，而钾长的钠长化只发生于成岩晚期。

4.Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite.

安粗岩包含斜长（长或奥长），是在正长和普通辉组成的细粒基质的大单晶体（斑晶）。

5.The feldspar group contains tectosilicate minerals with similar properties, including orthoclase, albite and labradorite. Feldspars make up more than 60% of the upper crust of the earth.

长系列包含网状矽酸盐的物并且有相似的属性,包括正长,钠长以及拉长.长构成了60%的上层地壳.