长江口外悬浮颗粒物中自生纤铁矿和胶黄铁矿

范德江; 陈彬; 王亮; 孙晓霞; 刘明; 杨作升

doi:10.3799/dqkx.2014.128

Volume 39 Issue 10

Oct. 2014

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Fan Dejiang, Chen Bin, Wang Liang, Sun Xiaoxia, Liu Ming, Yang Zuosheng, 2014. Authigenic Lepidocrocite and Greigite Particles inAquatic Environments off the Yangtze River Estuary. Earth Science, 39(10): 1364-1370. doi: 10.3799/dqkx.2014.128

Citation:

Fan Dejiang, Chen Bin, Wang Liang, Sun Xiaoxia, Liu Ming, Yang Zuosheng, 2014. Authigenic Lepidocrocite and Greigite Particles inAquatic Environments off the Yangtze River Estuary. Earth Science, 39(10): 1364-1370. doi: 10.3799/dqkx.2014.128

Citation:

Fan Dejiang, Chen Bin, Wang Liang, Sun Xiaoxia, Liu Ming, Yang Zuosheng, 2014. Authigenic Lepidocrocite and Greigite Particles inAquatic Environments off the Yangtze River Estuary. Earth Science, 39(10): 1364-1370. doi: 10.3799/dqkx.2014.128

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Authigenic Lepidocrocite and Greigite Particles inAquatic Environments off the Yangtze River Estuary

doi: 10.3799/dqkx.2014.128

Key Lab of Submarine Geosciences and Prospecting Techniques, of Ministry of Education, Ocean University of China, Qingdao 266100, China

Received Date: 2014-01-19
Publish Date: 2014-10-01

Abstract

Abstract

A scanning electron micrometer with energy-dispersive X-ray analytical system is used to investigate the suspended particles collected in 2010 in aquatic environments off the Yangtze River estuary in this study. The results show that iron oxide and iron sulfide co-exist in the same environment. Iron oxide is lepidocrocite, which accumulates in porously irregular aggregates. Iron sulfide is greigite and aggregates into organized framboids. The greigite framboids are enclosed by organic films. Lepidocrocite is in agreement with the environmental conditions. Meanwhile, greigite only exists at a local patch covered with organic films. Both lepidocrocite and greigite particles settle down easily, but their preservation depends on the early diagenesis conditions. It is suggested that at least a minor part of the iron sulfide framboids commonly found in the sedimentary sequences perhaps originates from their upward aquatic environment.
- the Yangtze River estuary,
- suspended particle matter,
- authigenic mineral,
- lepidocrocite,
- greigite,
- sedimentology,
- geochemistry

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References(34)

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Authigenic Lepidocrocite and Greigite Particles inAquatic Environments off the Yangtze River Estuary

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