辽宁鞍本地区铁矿床地质特征及找矿标志分析

摘要

Study on the regional geology and metallogenesis of the iron deposits in Anshan-Benxi area, Liaoning Province shows that the iron deposits, hosted in the late Archean granite-greenstone belts, are dominated by banded iron formation (BIF) type. The major ore-bearing beds are Cigou and Yingtaoyuan rock formations of Anshan group. The ores are in banded and massive structures, with hypidioblastic and relict textures. The evolution trend of the iron formation is closely related to volcanic activity. The most advantageous positions of searching for large and superlarge deposits is the Anshan-Benxi sag area, as well as the areas with high magnetic anomaly, complex magnetic anomaly, low-gentle magnetic anomaly, big deep magnetic anomaly and residual magnetic anomaly.%在区域成矿地质背景分析的基础上,对辽宁鞍山、本溪地区典型条带状铁矿床的矿床地质特征和找矿标志进行了分析总结,研究表明铁矿产于太古宙晚期花岗岩-绿岩带内,主要为条带状含铁建造型铁矿床,鞍山群茨沟岩组、樱桃园岩组是找矿主要层位.矿石具有条带状、块状构造,半自形等粒粒状变晶结构、残留结构等.含铁建造的演化趋势与火山作用密切相关.鞍本凹陷区以及高大磁异常、复杂磁异常、低缓磁异常、深大磁异常和剩余磁异常区是寻找大型、超大型铁矿的最有利部位.