| DOI: | 10.1002/2015GL064179
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| 论文题名: | Giant lacustrine pockmarks with subaqueous groundwater discharge and subsurface sediment mobilization |
| 作者: | Reusch A.; Loher M.; Bouffard D.; Moernaut J.; Hellmich F.; Anselmetti F.S.; Bernasconi S.M.; Hilbe M.; Kopf A.; Lilley M.D.; Meinecke G.; Strasser M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9299
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| EISSN: | 1944-9030
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| 出版年: | 2015
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| 卷: | 42, 期:9 | | 起始页码: | 3465
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| 结束页码: | 3473
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| 语种: | 英语
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| 英文关键词: | fluid flow
; pockmarks
; subaquatic groundwater discharge
; sublacustrine springs
; subsurface sediment mobilization
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| Scopus关键词: | Active suspension systems
; Discharge (fluid mechanics)
; Groundwater
; Lakes
; Sediments
; Suspended sediments
; Suspensions (fluids)
; Ground water discharge
; Hydrological system
; Pockmarks
; Sediment distribution
; Sediment suspension
; Subsurface fluid flow
; Subsurface sediments
; Water composition
; Flow of fluids
; discharge
; fluid flow
; groundwater flow
; levee
; pockmark
; subsurface flow
; suspended sediment
; Lake Neuchatel
; Switzerland
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| 英文摘要: | Subsurface fluid flow in oceans and lakes affects bathymetric morphology, sediment distribution, and water composition. We present newly discovered giant lacustrine pockmarks in Lake Neuchâtel (up to 160m diameter and 30m deep) that rank among the largest known pockmarks in lakes. Our multidisciplinary study reveals ∼60m of suspended sediment inside a pockmark. The sediment suspension is 2.6° warmer and isotopically lighter in δ18OH2O by 1.5‰ than the ambient lake water, documenting currently active fluid flow by karstic groundwater discharge from the Jura Mountain front into the Swiss Plateau hydrological system. Strikingly, the levees of the pockmarks comprise subsurface sediment mobilization deposits representing episodic phases of sediment expulsion during the past. They strongly resemble subsurface fluid flow features in the marine realm. Comparable processes are expected to also be relevant for other carbonate-dominated mountain front ranges, where karstic groundwater discharges into lacustrine or marine settings. Key Points Giant active lacustrine pockmarks are discovered in Lake Neuchatel, Switzerland Pockmark activity is sustained by sublacustrine groundwater discharge Sediment record reveals episodic high-discharge phases ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930481425&doi=10.1002%2f2015GL064179&partnerID=40&md5=d82779f7e293d5d3c89237470f16bbe0
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8915
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| 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: | Geological Institute, ETH Zurich, Zürich, Switzerland
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| Recommended Citation: | |
Reusch A.,Loher M.,Bouffard D.,et al. Giant lacustrine pockmarks with subaqueous groundwater discharge and subsurface sediment mobilization[J]. Geophysical Research Letters,2015-01-01,42(9).
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