地质学报2011，Vol.85Issue(5)：789-801,13.DOI:CNKI:11-1951/P.20110512.0827.007
安徽省庐江县泥河铁硫矿床地质特征及成因初步分析
Geological Characteristics and Genesis of the Nihe Fe-S deposit,Lujiang Country, Anhui Province
摘要
Abstract
Nihe Fe-S deposit is located in northwest of the Luzong volcanic basin on the metallogenic belt along the Middle-Lower reaches of Yangtze River, with Fe and S reserves up to the large scale and anhydrite reserves up to middle scale. It is one of the key breakthroughs in ore exploration and of great academic significance and exploration value. The main strata in the Nihe mine district are andesitic volcanic rocks and clastic rock of the Zhuanqiao Formation and Suangmiao Formations, while the main intrusive rock is pyroxene diorite porphyrite. Lenticular magnetite ore bodies occur as lens at top of the diorite porphyrite dome, and the lenticular and stratiform pyrite and anhydrite ore bodies occur in the Zhuanqiao Formation volcanic rocks. The metallic minerals are magnetite and pyrite and the main gangue minerals are anhydrite,pyroxene and quartz. The ore is characterized by magnetite-anhydrite-pyroxene assemblage. The ore structures mainly include massive structure and disseminated structure. The ore texture includes euhedralsubhedral granular texture, anhedral granular texture, metasomatic pseudomor-phic texture, and sieve texture. The alteration in the Nihe iron deposit can be divided into melanocratic alteration zone, hybrid alteration zone and leucocratic alteration zone from top to bottom. The main alteration types include anhydrite-pyroxene alteration, pyrite alteration, siliceous alteration and argillation alteration. The formation of the Nihe iron deposit can be divided into four stages, magnetite-pyrite stage, quartzcarbonate-pyrite stage, quartz-pyrite stage, and carbonate-sulfate stage. Based on the geological characteristics of the Nihe iron deposit and comparison with the porphyry iron deposit in the Ningwu volcanic basin, the Nihe iron deposit has closely relationships with the pyroxene diorite porphyrite, and belongs to the "Taocun type" porphyrite iron deposit.关键词
庐枞火山岩盆地/泥河铁矿床/辉石闪长玢岩/玢岩型铁矿床Key words
Luzong volcanic basin/ Nihe iron deposit/ Pyroxene diorite porphyrite/ porphyrite iron deposit引用本文复制引用
赵文广,吴明安,张宜勇,王克友,范裕,汪龙云,魏国辉,车英丹..安徽省庐江县泥河铁硫矿床地质特征及成因初步分析[J].地质学报,2011,85(5):789-801,13.基金项目
本文为中国地质调查局大调查项目(编号1212010631701、1212010781015),"十一五"国家科技支撑计划项目(2009BAB43802)及安徽五鑫矿业开发有限公司地质勘查项目(编号[2008]01)资助的成果. （编号1212010631701、1212010781015）
