沉积岩的一种结构,由球形或椭球形颗粒组成,颗粒外形、大小像鱼卵。由鲕体与成分相同的胶结物组成,一般粒径小于2毫米。形成于温暖或湿润的气候,平缓的地形,动荡的浅海环境。常见于化学沉积岩例如石灰岩、铁质岩、铝质岩中。 鲕粒中心是生物碎屑、矿物碎屑,同心圆状构造,少数具有放射状构造,个别有复鲕,即两到三个单鲕包含在一个共同的同心层状外壳之中。
矽质岩包括燧石和沈积石英岩,呈薄层状产出,沈积石英岩具鲕状、砾状结构。
The thin-beded siliceous -rocks include chert and depositional quartz with textures of oolite and pebble.
从矿石结构类型来看,蜂窝状矿石中的镓品位明显高于豆、鲕状和致密状矿石。
Texture Type of Ore. Because of intensive epegenetic enrichment, the average content of Gallium in honeycomb structure is higher than that in pisolitic, oolitic structure and massive structure.
结果表明:矿石以鲕状构造为主,具有典型的同心环带结构。
The research results showed that the main ore structure is oolitic with a typical band structure of concentric rings.
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