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弓长岭铁矿床是辽宁省鞍山-本溪地区最大的“鞍山式”富铁矿产区。弓长岭矿区的BIF型铁矿主要赋存于新太古宇鞍山群茨沟岩组之中,岩性主要是斜长角闪岩、黑云变粒岩、硅质岩,夹部分磁铁石英岩。弓长岭富铁矿主要赋存于弓长岭二矿区的第6层铁矿层(以下简称Fe6)之中,富铁矿的形成与断裂构造以及断裂附近的蚀变岩密切相关。本次工作对弓长岭矿区的蚀变围岩进行取样分析,结合前人的分析数据,将分析结果进行分析对比,对弓长岭矿区蚀变岩和富矿成因进行探讨。
Gongchangling Iron Deposit is the largest “Anshan-type” iron-rich ore producing area in Anshan-Benxi, Liaoning Province. The BIF-type iron ore in the Gongchangling mining area mainly occurs in the Xunzigou Czenggou Formation in the Neo-Archean. The lithology is mainly amphibolite, black-mica granulite, silicalite, and part of magnetite-quartzite . The Gongchangling rich iron ore mainly occurs in the 6th layer of iron deposit (hereinafter referred to as Fe6) in Gongchangling No.2 mining area. The formation of rich iron ore is closely related to the fault structure and altered rock near the fault. Based on the analysis of the previous data, the analysis results are analyzed and compared to analyze the alteration rocks and ore deposits in Gongchangling mining area.