五莲坤山透辉岩矿地质特征

Geological Characteristics of Malakolithfels Deposit in Kunshan of Wulian County

五莲县坤山透辉岩矿赋存于古元古代粉子山群张格庄组第三岩性段下部白云石大理岩层中,有水西何子和院上2个矿段,每个矿段由2个似层状矿体组成。矿体长154～264m,厚5.68～17.57m,矿体产状稳定。顶、底板围岩岩性均为白云石大理岩,2矿层间隔4～6m。透辉岩矿矿石特征与平度、莱西等地古元古代荆山群野头组赋存的透辉岩矿相似,矿石中化学成分变化稳定,Fe2O3含量普遍较低,矿石质量好,物化性能稳定,适于用做陶瓷原料。五莲县坤山透辉岩矿为严格受地层层位控制的变质沉积型矿床。

Malalothfels deposit in Kunshan of Wulian county is composed of two ore sections, which occurs in dolomite marble in lower part of third rock section in Zhanggezhuang formation of Paleoproterozoic Fenzishan group. Each section is composed of two stratoid orebodies. Rock property of upper and lower part is dolomite marble. Contents of major chemical compositions of malakolithfels varied very little, which are similiar with malakolithfels in Mantou formation of Paleoproterozoic Jingshan group. Chemical compositions and ores are simple. Fe 2O 3 content which will effect ore quality is commly low. Physcial and chemical property is stable which is suitable for using as pottery materials. Natural type of ore belongs to malakolithfels type. Malakolithfels in Kunshan of Wulian county is strictly controlled by strata, which was formed by regional metamorphic of Ca-Mg silicic materials.