| 草莓状黄铁矿与古海洋环境恢复 |
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| 引用本文： | 常华进,储雪蕾.草莓状黄铁矿与古海洋环境恢复[J].地球科学进展,2011,26(5):475-481. |
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| 作者姓名： | 常华进 储雪蕾 |
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| 作者单位： | 1. 青海师范大学生命与地理科学学院,青海,西宁,810008;青藏高原环境与资源教育部重点实验室,青海,西宁,810008
2. 中国科学院地质与地球物理研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金项目“华南埃迪卡拉纪—寒武纪过渡时期硅岩的铁组分与深水环境指示”(编号:41002011)和“晚寒武世的SPICE事件和古海洋”(编号:40873007); 青海师范大学中青年教师科研基金项目“西宁盆地记录的始新世—渐新世转折期古气候演化”资助 |
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| 摘 要： | 草莓状黄铁矿是指由等粒度的亚微米级黄铁矿晶体或微晶体紧密堆积而成,形似草莓的黄铁矿球形集合体.它们在氧化和缺氧海洋环境中形成的机理不同,沉积岩中草莓状黄铁矿的粒径分布特征是恢复古海洋的氧化还原状态行之有效的方法之一.然而,草莓状黄铁矿粒径统计仅能区分出氧化和缺氧硫化的环境,不能进一步区分缺氧程度及状态(如次氧化、缺氧含...
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| 关 键 词： | 草莓状黄铁矿 氧化还原状态 古海洋 |
Pyrite Framboids and Palaeo-ocean Redox Condition Reconstruction |
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| Chang Huajin,Chu Xuelei.Pyrite Framboids and Palaeo-ocean Redox Condition Reconstruction[J].Advance in Earth Sciences,2011,26(5):475-481. |
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| Authors: | Chang Huajin Chu Xuelei |
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| Institution: | Chang Huajin1,2,Chu Xuelei3(1.School of Life and Geography Sciences,Qinghai Normal University,Xining 810008,China,2.Key Laboratory of Tibetan Plateau Environment and Resources(Ministry of Education),3.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China) |
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| Abstract: | Framboidal pyrites are densely-packed,raspberry-like,spherical aggregates of equigranular,micron-sized crystals or microcrysts.Because of the difference principle in framboidal pyrites formation between oxic and euxinic depositional conditions,size distribution of framboids is indicative of oxygen levels for palaeo-ocean water column.However,only oxic and euxinic conditions can be definitely distinguished but suboxic or ferruginous conditions(anoxic and containing dissolved Fe2+) using the framboidal pyrite... |
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| Keywords: | Framboidal pyrite Redox conditions Palaeo-ocean |
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