山东昌邑东部地区古元古代变质沉积型铁矿地质特征

Geological Characteristics of Neoproterozoic Metamorphic Sedimentary Iron Deposit in East Part of Changyi Area in Shandong Province

摘要:

山东昌邑东部地区铁矿分布在莱州-安丘磁异常铁成矿带内,该区发育着古元古代粉子山群小宋组及荆山群野头组祥山段含铁岩系,磁铁黑云变粒岩、磁铁石英岩、磁铁大理岩、磁铁蛇纹石化大理岩等含铁岩层发育在这2套含铁岩系中。目前,已发现有毛家寨、南任、常家屯及东辛庄-莲花山等矿床。铁矿体呈层状、似层状及透镜状,矿体产状与围岩基本一致,矿体长多为200~700m,厚多为2~15m,延深多为60~300m。矿石品位多为27%~33%,属酸性矿石。该矿床属于受含铁沉积建造及变质作用控制的变质沉积型矿床。

Abstract:

Iron deposits in east part of Changyi in Shandong province distribute in Laizhou-Anqiu magnetic abnormal iron-forming belt. Iron-bearing rock series of Neoarchean Xiaosong formation in Fenzishan group and Xiangshan section of Yetou formation in Jingshan group developed in this area. Iron-bearing strata, such as magnetic biotitic granulites, magnetic granites, magnetic marble and magnetic serpentinuous marble developed in these two series of rocks. At present, Maojiazhai, Nanren, Changjiatun and Dongxinzhuan...