DOI: 10.1016/j.epsl.2018.04.038
Scopus记录号: 2-s2.0-85046784419
论文题名: Clay minerals trap hydrogen in the Earth's crust: Evidence from the Cigar Lake uranium deposit, Athabasca
作者: Truche L. ; Joubert G. ; Dargent M. ; Martz P. ; Cathelineau M. ; Rigaudier T. ; Quirt D.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 493 起始页码: 186
结束页码: 197
语种: 英语
英文关键词: clay
; hydrogen
; radiolysis
; sorption
; storage
; uranium deposit
Scopus关键词: Binding sites
; Chlorite minerals
; Clay
; Clay alteration
; Crystalline rocks
; Deposits
; Energy resources
; Energy storage
; Hot springs
; Hydrogen
; Hydrogen storage
; Kaolinite
; Lakes
; Magnesite
; Ores
; Petroleum tar
; Radiation chemistry
; Radiolysis
; Redox reactions
; Silicates
; Sorption
; Structural geology
; Uranium
; Uranium deposits
; Volcanic rocks
; Microbial eco system
; Multiple binding sites
; Saskatchewan , Canada
; Serpentinized ultramafic rocks
; Thermal desorption measurements
; Total organic contents
; Uranium ore deposit
; Water saturated rock
; Clay deposits
; adsorption
; chlorite
; crust
; desorption
; hydrogen
; illite
; kaolinite
; ore deposit
; uranium
; Alberta
; Athabasca
; Canada
; Cigar Lake
; Saskatchewan
英文摘要: Hydrogen (H2)-rich fluids are observed in a wide variety of geologic settings including gas seeps in serpentinized ultramafic rocks, sub-seafloor hydrothermal vents, fracture networks in crystalline rocks from continental and oceanic crust, and volcanic gases. Natural hydrogen sources can sustain deep microbial ecosystems, induce abiotic hydrocarbons synthesis and trigger the formation of prebiotic organic compounds. However, due to its extreme mobility and small size, hydrogen is not easily trapped in the crust. If not rapidly consumed by redox reactions mediated by bacteria or suitable mineral catalysts it diffuses through the rocks and migrates toward the surface. Therefore, H2 is not supposed to accumulate in the crust. We challenge this view by demonstrating that significant amount of H2 may be adsorbed by clay minerals and remain trapped beneath the surface. Here, we report for the first time H2 content in clay-rich rocks, mainly composed of illite, chlorite, and kaolinite from the Cigar Lake uranium ore deposit (northern Saskatchewan, Canada). Thermal desorption measurements reveal that H2 is enriched up to 500 ppm (i.e. 0.25 mol kg−1 of rock) in these water-saturated rocks having a very low total organic content (<0.5 wt%). Such hydrogen uptake is comparable and even exceeds adsorbed methane capacities reported elsewhere for pure clay minerals or shales. Sudoite (Al–Mg di-trioctahedral chlorite) is probably the main mineral responsible for H2 adsorption in the present case. The presence of multiple binding sites in interlinked nanopores between crystal layers of illite-chlorite particles offers the ideal conditions for hydrogen sorption. We demonstrate that 4 to 17% of H2 produced by water radiolysis over the 1.4-Ga-lifetime of the Cigar Lake uranium ore deposit has been trapped in the surrounding clay alteration haloes. As a result, sorption processes on layered silicates must not be overlooked as they may exert an important control on the fate and mobility of H2 in the crust. Furthermore, the high capacity of clay minerals to sorb molecular hydrogen may also open up new opportunities for exploration of unexpected energy resources and for H2 storage based on geo-inspired materials. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109874
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Université Grenoble Alpes, CNRS, ISTerre, Grenoble, F-38000, France; Université de Lorraine, CNRS, CREGU, GeoRessources, UMR 7359, BP 70239, Vandoeuvre-lès-Nancy, F-54506, France; Orano Mining BU, 1 place Jean Millier, Paris La Défense Cedex, F-92084, France; Université de Lorraine, CRPG UMR 7358 CNRS-UL, Vandœuvre-lès-Nancy cedex, France; Orano Canada Inc., P.O. Box 9204, 810 - 45th Street West, Saskatoon, SK S7K 3X5, Canada
Recommended Citation:
Truche L.,Joubert G.,Dargent M.,et al. Clay minerals trap hydrogen in the Earth's crust: Evidence from the Cigar Lake uranium deposit, Athabasca[J]. Earth and Planetary Science Letters,2018-01-01,493