• 责任者：Zhang Licheng (Geological Exploration Research Institute ; Metallurgical Geological Exploration Bureau of Liaoning Province ; Anshan 114000 ; China) ; Wang Yitian
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2013
• 卷期：32(4)
• 关键词：铁矿 ; iron ores ; 天山 ; Tianshan Mountains
• 页码：p.431-449
• 图表：11 illus., 6 tables, 42 refs.
• 分类号：1001
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

     The Hongyuntan iron deposit is hosted in pyroclastic rocks of the Lower Carboniferous Yamansu Formation. The ore bodies occur as layers, stratoid bodies or lenses. The principal ore mineral is magnetite, together with minor maghemite, specularite, pyrite and trace chalcopyrite. The gangue minerals include garnet, diopside, actinolite, chlorite, tremolite, epidote, biotite, albite and quartz. The ore structures are mainly of massive and disseminated forms, with occasional banded or veined forms. The ore textures are of subhedral-anhedral granular and metasomatic types. In combination with geological characteristics, the authors suggest that the skarn might have resulted from interaction between Ca-rich pyroclastic and Fe-rich magmatic hydrothermal fluid which was transported along the fault system. The formation of magnetite was hence related to the regressive metamorphism of the skarn.