安徽庐枞地区铁矿成矿条件和综合信息标志

在全面收集安徽庐枞地区铁矿2种主要矿床类型(罗河式、龙桥式)资料的基础上,综合整理了该区玢岩型铁矿成矿地质条件,在地质、物探、化探、遥感、自然重砂等找矿信息研究的基础上,对该区铁矿综合信息标志进行了研究。研究结果表明,罗河式、龙桥式铁矿分别产于燕山晚期砖桥组的火山岩和火山岩盆地基底地层中三叠世周冲村组中,铁矿床与该区富碱、富钾中基性火山岩、次火山岩及基底隆起、基底断裂、环形构造等密切相关,成矿物质主要来源于中基性岩浆、周冲村组膏溶角砾岩等,磁异常与重力异常同位是该区地质找矿的重要标志。

Analysis on metallogenic conditions and integrated information signs of iron deposits in Lujiang-Zongyang area, Anhui, China

Based on data of two major iron deposit types( Luohe style and Longqiao style) in Anhui Luzong, the paper summarized the metallogenic conditions of the porphyry-type iron deposit in this area. Based on the geological, geophysical and geochemical exploration, remote sensing and nature heavy minerals prospecting information, the paper studied the multi-source signs of the iron deposit in this area. The results indicate that Luohe style and Longqiao style respectivley occured in the volcanic rocks of Zhuanqiao Formation in the Late Yanshan period and Zhouchongcun Formation of basement strata of the volcanic basin in Middle Triassic Epoch. The deposits have close relationship with the alkali rich and K rich neutral-basic volcanic rocks, sub-volcanic rocks and basement uplift, basement fracture, and circular structure etc. The mineralization mainly derived from neutral-basic magma and gypsum karst breccia of Zhouchongcun Formation. The apposition of magnetic anomaly and gravity anomaly are the important prospecting signs in this area.