赞比亚Kamatete铁矿床成矿特征及成因探讨

Metallogenic Characteristics and Origin Study of Kamatete Iron Deposit in Zambia

摘要:

非洲中部卢弗里安弧形（Lufilian Arc）构造带，从北到南分为5个构造单元：加丹加坳拉槽外部褶皱推覆带穹隆区复向斜带加丹加高原。Kamatete铁矿床产于复向斜带构造单元中，该文通过对该铁矿床的区域地质背景、矿区地质、矿体特征及其围岩等方面进行分析研究,认为该矿床的成因类型为岩浆晚期贯入型铁矿床，铁矿床主要由富铁的二长岩类岩浆和富铁的辉长岩岩浆分异而成，少量由碳酸岩浆分异而成。

Abstract:

Lufilian Arc tectonic belt in middle Africa is divided into five tectonic units from north to south: they are Katanga Aulacogen, External fold-thrust belt, Domes Region, Synclinorium belt and Katanga High. Kamatete iron deposit is in Synclinorium belt. According to the study of regional geological background, deposit geology, orebody characteristics and country rock of Kamatete iron deposit, it is regarded that the deposit is late magmatic injection-type (hypabyssal ore-magma type) deposit. The ore-magma is mainly consisted of iron-rich monzonite magma and rich iron gabbro magmatic differentiation, and a small amount of carbonatite magmatic differentiation.