DOI: 10.1002/2014GL060873
论文题名: Large-scale organization of carbon dioxide discharge in the Nepal Himalayas
作者: Girault F. ; Bollinger L. ; Bhattarai M. ; Koirala B.P. ; France-Lanord C. ; Rajaure S. ; Gaillardet J. ; Fort M. ; Sapkota S.N. ; Perrier F.
刊名: Geophysical Research Letters
ISSN: 0094-9772
EISSN: 1944-9503
出版年: 2014
卷: 41, 期: 18 起始页码: 6358
结束页码: 6366
语种: 英语
英文关键词: carbon dioxide
; CO2 flux
; hydrothermal system
; megaquake
; metamorphic decarbonation
; radon-222
Scopus关键词: Carbon
; Hot springs
; Radon
; Decarbonation
; Flux measurements
; Geological heterogeneities
; Hydrothermal system
; Main central thrusts
; megaquake
; Radon-222
; Spatial organization
; Carbon dioxide
; atmospheric pollution
; carbon dioxide
; carbon flux
; carbon isotope
; flux measurement
; hydrothermal system
; isotopic ratio
; radon isotope
; Himalayas
; Nepal
英文摘要: Gaseous carbon dioxide (CO2 ) and radon-222 release from the ground was investigated along the Main Central Thrust zone in the Nepal Himalayas. From 2200 CO2 and 900 radon-222 flux measurements near 13 hot springs from western to central Nepal, we obtained total CO2 and radon discharges varying from 10-3 to 1.6 mol s-1 and 20 to 1600 Bq s-1, respectively. We observed a coherent organization at spatial scales of ≈ 10 km in a given region: low CO2 and radon discharges around Pokhara (midwestern Nepal) and in the Bhote Kosi Valley (east Nepal); low CO2 but large radon discharges in Lower Dolpo (west Nepal); and large CO2 and radon discharges in the upper Trisuli Valley (central Nepal). A 110 km long CO2 -producing segment, with high carbon isotopic ratios, suggesting metamorphic decarbonation, is thus evidenced from 84.5°E to 85.5°E. This spatial organization could be controlled by geological heterogeneity or large Himalayan earthquakes. Key Points CO2 and radon fluxes were measured near 13 hot springs in the Nepal HimalayasIntegrated CO2 discharges are heterogeneous but coherently spatially organizedA 110 km long metamorphic CO2 -producing segment is clearly defined ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911191677&doi=10.1002%2f2014GL060873&partnerID=40&md5=51d12289d09b088c6dd3f1ae3031b9c1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7036
Appears in Collections: 气候减缓与适应
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作者单位: Institut de Physique du Globe de Paris, Université Paris Diderot, CNRS UMR 7154, Paris, France
Recommended Citation:
Girault F.,Bollinger L.,Bhattarai M.,et al. Large-scale organization of carbon dioxide discharge in the Nepal Himalayas[J]. Geophysical Research Letters,2014-01-01,41(18).