Ore-Forming Fluid Characteristic of Nihe Iron Deposit in Lu-Zong Basin, Anhui Province and Its Significance to Ore Genesis
详细信息
- 责任者：Fan Yu (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Zhou Taofa
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(10)
- 关键词：铁矿 ; iron ores ; 成矿流体 ; ore-forming fluids ; 长江中下游成矿带 ; Metallogenic Belt of Middle and Lower Reaches of Yangtze River
- 页码：p.3113-3124
- 图表：illus., 2 tables, 35 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Lu-Zong Mesozoic volcanic basin is located in the Lower Yangtze River fault-depression zone, where is the north margin of the Yangtze Block. Nihe deposit located in the northwest part of Lu-Zong basin,which is a new found large iron-sulfuranhydrite deposit.Based on detail field study,the fluid inclusions in anhydrite of different stages were studied by fluid inclusions petrography,microthermometry and Raman spectrometry.The results show that three types of fluid inclusions exist:Ⅰa type primary fluid inclusions(L + G),Ⅰb tpye secondary fluid inclusions(L + G) and Ⅱ type fluid inclusions(L).The ore-forming fluids evolution is from medium-high temperature and medium salinity to low temperature and low salinity.The ore-forming process and metallogenetic model has been discussed in the paper.