攀西地区红格钒钛磁铁矿床地球化学异常特征分析及矿床成因探讨

Geochemical Anomaly Characteristics and Genesis of the Hongge Vanadic Titano-magnetite Deposit in Panzhihua-Xichang Region

攀西地区基性-超基性含矿岩体以赋存超大型钒钛磁铁矿矿床而闻名于世,是我国重要的铁矿产地和重要的钒钛资源基地。通过对该矿床的地质特征、构造与围岩对成矿的控制作用及地球化学异常特征分析研究,认为红格钒钛磁铁矿成矿物质来源于上地幔,玄武岩浆结晶分异过程中有地壳物质混入地幔物质。矿床的形成对时间与空间要求严格。基性-超基性岩、灯影组白云质灰岩和峨眉山玄武岩是形成红格钒钛磁铁矿床的必要条件。

The Panzhihua-Xichang region is famed at the world for the super-large V- Ti magne- tite deposit occurred within the mafic-ultramafic ore-bearing rock-masses there. It＇s an important producing area of iron ore and a momentous base of vanadium titanium resource in China. After studying and analyzing the geologic characteristic of this deposit, as well as the controlling effects of tectonics and wall rocks on mineralization, it＇s pointed that the ore-forming materials of the Hongge vanadic titano-magnetite deposit were originated from the upper mantle, and the crustal material mixed with mantle material during the crystallization differentiation process of basaltic magma. The formation of this deposit must meet the requirements of time and space. Basic ultra- basic rocks, dolomitic limestone in Dengying Formation and Emeishan basalt are necessary condi- tions for the formation of the Hongge vanadic titano-magnetite deposit.