摘要
铁白云石微斜长石岩作为一种特殊岩石类型，在辽东元古宙裂谷块状硫化物矿床中与成矿关系密切。岩石呈韵律层状，富含Ｋ、Ｂ、Ｓｉ，在Ａｌ２Ｏ３—ＳｉＯ２—（ＣａＯ＋ＭｇＯ）和Ｆｅ—Ｍｎ—（Ｃｕ＋Ｎｉ＋Ｃｏ）三角图上均落入热水沉积岩区。稀土元素具有铈负异常、轻稀土元素富集等特征。硅同位素地球化学显示该岩石为热水沉积成因。此类岩石做为一种热水沉积岩具有重要的找矿意义，依据这一标志在老矿山外围已经找到了硫化物矿体。
Ankerite microclinite, a special type of rock, is closely related to the ore-forming process of massive sulfide deposits in the East Liaoning Proterozoic rift. Assuming rhythmic layering form, the rock is rich in K,B and Si and falls into the field of hot water deposition both in Al 2O 3-SiO 2-(CaO+MgO) diagram and in Fe-Mn-(Cu+Ni+Co) diagram. Its REE geochemistry is characterized by negative Ce anomaly and enrichment of LREE, and its Si isotopic geochemistry implies an origin of hot water deposition. As a sort of hot water sedimentary rock, it exhibits important ore-prospecting indicator significance. With this rock as an indicator, sulfide orebodies were discovered on the outskirts of the old mine.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
1998年第1期41-47,共7页
Acta Petrologica et Mineralogica
关键词
铁白云石微斜长石岩
热水沉积
硫化物矿床
找矿标志
ankerite microclinite
hot water deposition
sulfide deposit
criteria for ore prospecting
