摘要
甘肃当金山二号区块大理岩矿赋存于奥陶纪盐池湾组(Oyc)第二岩性段(Oyc2)中,矿体呈层状产出,矿石品位稳定,属I级品.总结了当金山二号区块大理岩矿床赋存层位、矿体形态及规模、矿石物质组成、结构构造、自然类型等地质特征.通过综合分析该区地质特征,确定大理岩矿属于滨-浅海陆架相沉积变质型矿床,大理岩由区域岩浆热变质作用形成,表出露的大理岩为其找矿标志.
Abstract
Marble mine in Dangjinshan No.2 block,Gansu province,occurs in the second lithologic member(Oyc2)of Ordovician Yanchiwan Formation(Oyc).The ore body is stratified and the ore grade is stable,belonging to grade Ⅰ.This paper summarizes the geological characteristics of marble mine in Dangjinshan No.2 block,including occurrence position,ore body shape and size,ore material composition,texture andstructure,and natural type.Through comprehensive analysis of the geological characteristics of the area,it is determined that the marble deposit belongs to the shore-shallow shelf sedimentary metamorphic deposit,the marble is formed by regional magmatic thermal metamorphism,and the marble exposed on the surface is the prospecting indicator.
基金项目
甘肃省自然资源厅地质勘查基金(甘资勘发[2020]26号:202001-Y04)
维普
万方数据