Deep State w:st="on">Ore Magma-Hydrothermal System of Zhonggu Ore Field in Southern Part of Ningwu Basin

• 责任者：Hou Tong (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Zhaochong
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17（1)
• 关键词：成矿流体 ; ore-forming fluids ; 铁矿 ; iron ores ; 江苏 ; Jiangsu Province ; 安徽 ; Anhui Province
• 页码：p.186-194
• 图表：5 illus., 1 table, 33 refs.
• 分类号：1001
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

The Zhonggu ore field, as an important ore-cluster in the southern part of the Ningwu volcanic basin, hosts series of iron deposits which are represented by Gushan and Baixiangshan and usually occurred at the contact zone between the dioritic porphyry and sedimentary rocks. Our investigation shows that neither the dioritic porphyry nor the sedimentary rock is the source of iron ores, and that the source of most iron-rich ore- bodies is the ore magma-hydrothermal system in the deep chamber.  State w:st="on">Ore magma which was formed by liquid immiscibility is the main source of Gushan deposit, and the residual iron-rich hydrothermal fluids which occurred as Na-Fe-Cl complex is the main source of Baixiangshan deposit.