Fe Isotope Characteristics of the Gucheng Manganese Ore Deposits in Hubei Province and Its Geological Implication
详细信息
- 责任者：Zhang Feifei (State Key Laboratory for Continental Tectonics and Dynamics ; Institute of Geology ; CAGS ; Beijing 100037 ; China) ; Peng Qianyun
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(9)
- 关键词：锰矿 ; manganese ores ; 铁同位素 ; iron isotopes ; 古环境 ; paleoenvironment ; 湖北 ; Hubei Province
- 页码：p.1411-1418
- 图表：5 illus., 1 table, 55 refs.
- 分类号：1001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
This paper reported Fe isotope compositions for pyrite in the Mn-bearing series of the Gucheng manganese ore deposits in Hubei province.Fe isotope analysis was used to constraint processes for pyrite formation and sedimental environment during the early stage of Cyrogenian Datangpo Formation.Our results show δ(56)~Fe values range from-0.13‰ to +0.54‰ with a mean of 0.22‰,indicating those pyrites are enrichment in heavier Fe isotope relative to ambient seawater(δ(56)~Fe=0~-0.5‰).We suppose partial oxidation of the initial ferrous iron to ferric iron and the following near-quantitative transformation of iron-oxide or iron-hydroxide into pyrite during diagenesis is responsible for the positive Fe isotopes values for those pyrites in the Mn-bearing series.Thus,it is suggested in this study that the deep ocean is gradually oxidized after Tiesi’ao deglaciation,but is not totally oxidized.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |