DOI: 10.1002/2016GL069117
论文题名: Quantifying manganese and nitrogen cycle coupling in manganese-rich, organic carbon-starved marine sediments: Examples from the Clarion-Clipperton fracture zone
作者: Mogollón J.M. ; Mewes K. ; Kasten S.
刊名: Geophysical Research Letters
ISSN: 0094-8931
EISSN: 1944-8662
出版年: 2016
卷: 43, 期: 13 起始页码: 7114
结束页码: 7123
语种: 英语
英文关键词: geochemical model
; sediment diagenesis
; suboxic geochemistry
Scopus关键词: Geochemistry
; Manganese
; Nitrates
; Nitrogen
; Organic carbon
; Sedimentology
; Sediments
; Submarine geology
; Eastern equatorial Pacific
; Geochemical modeling
; Microbial metabolic process
; Organic carbon contents
; Organic matter degradations
; Oxidized nitrogen
; Sedimentary environment
; Sedimentation rates
; Manganese oxide
; deep sea
; fracture zone
; manganese
; marine sediment
; metabolism
; microbial activity
; nitrogen cycle
; numerical model
; organic carbon
; oxidation
; sediment chemistry
; sedimentation rate
; suboxic conditions
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: Extensive deep-sea sedimentary areas are characterized by low organic carbon contents and thus harbor suboxic sedimentary environments where secondary (autotrophic) redox cycling becomes important for microbial metabolic processes. Simulation results for three stations in the Eastern Equatorial Pacific with low organic carbon content (<0.5 dry wt %) and low sedimentation rates (10−1–100 mm ky−1) show that ammonium generated during organic matter degradation may act as a reducing agent for manganese oxides below the oxic zone. Likewise, at these sedimentary depths, dissolved reduced manganese may act as a reducing agent for oxidized nitrogen species. These manganese-coupled transformations provide a suboxic conversion pathway of ammonium and nitrate to dinitrogen. These manganese-nitrogen interactions further explain the presence and production of dissolved reduced manganese (up to tens of μM concentration) in sediments with high nitrate (>20 μM) concentrations. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979920456&doi=10.1002%2f2016GL069117&partnerID=40&md5=dd264b010859eeea255c6b18370b9375
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9894
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Recommended Citation:
Mogollón J.M.,Mewes K.,Kasten S.. Quantifying manganese and nitrogen cycle coupling in manganese-rich, organic carbon-starved marine sediments: Examples from the Clarion-Clipperton fracture zone[J]. Geophysical Research Letters,2016-01-01,43(13).