甘肃省迭部县黑拉铁矿地质特征及矿床成因浅析

Geological Characteristics and Genetic Analysis of Hela Iron Ore Deposit in Dibu County,Gansu Province

黑拉铁矿位于西倾山-南秦岭陆缘裂谷带,属青稞崖-舟曲燕山期金锑汞砷成矿带,具有良好的成矿地质条件和找矿潜力。本文通过对黑拉铁矿区的地质特征、矿体特征的总结及控矿因素的分析,认为黑拉铁矿矿床受控于特定的地质构造背景,产于中泥盆统下吾拉组下岩段下碎屑岩组地层中,并受其控制,成因属黑拉铁矿属于浅海相沉积型贫赤铁矿床,以期对在青稞崖-舟曲燕山期金锑汞砷成矿带内寻找同类型的铁矿有所帮助。

The Hela Iron deposit is located in the rift zone of the western Inclination Mountain to the southern Qinling continental margin,belonging to the Qing KeYa-Zhouquyanshan Au-Sb-Hg-As metallogenic belt,which has good metallogenic geological conditions and prospecting potential.Based on the summary of geological characteristics and ore-body characteristics of the Hela iron ore area and the analysis of ore-controlling factors,it is believed that the Hela iron ore deposit is controlled by the specific geological tectonic background and is produced in the lower clastic rock formation of the lower member of the Lower Wula Formation of the Middle Devonian and is controlled by it.Its origin is Hela iron ore,a lean hematite deposit of shallow Marine sedimentary type.It is expected to be helpful to search for the same type of iron ore in the Au-Sb-Hg-As metallogenic belt of Qing KeYa-Zhouqu.