DOI: 10.1016/j.epsl.2017.11.041
Scopus记录号: 2-s2.0-85037329401
论文题名: High sedimentation rates and thrust fault modulation: Insights from ocean drilling offshore the St. Elias Mountains, southern Alaska
作者: Worthington L.L. ; Daigle H. ; Clary W.A. ; Gulick S.P.S. ; Montelli A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 483 起始页码: 1
结束页码: 12
语种: 英语
英文关键词: accretionary margin
; climate–tectonic interaction
; fold-thrust belt
; ocean drilling
; syntectonic sedimentation
; temperate glaciation
Scopus关键词: Glacial geology
; Offshore drilling
; Sediments
; Seismology
; Tectonics
; Accretionary
; Continental shelves
; Fold-thrust belts
; Integrated ocean drilling programs
; Ocean drillings
; Sediment accumulation
; Sedimentation rates
; temperate glaciation
; Faulting
; accretionary prism
; active fault
; continental shelf
; faulting
; fold and thrust belt
; glaciation
; Ocean Drilling Program
; sedimentation rate
; seismic data
; Alaska
; Saint Elias Mountains
; United States
英文摘要: The southern Alaskan margin offshore the St. Elias Mountains has experienced the highest recorded offshore sediment accumulation rates globally. Combined with high uplift rates, active convergence and extensive temperate glaciation, the margin provides a superb setting for evaluating competing influences of tectonic and surface processes on orogen development. We correlate results from Integrated Ocean Drilling Program (IODP) Expedition 341 Sites U1420 and U1421 with regional seismic data to determine the spatial and temporal evolution of the Pamplona Zone fold-thrust belt that forms the offshore St. Elias deformation front on the continental shelf. Our mapping shows that the pattern of active faulting changed from distributed across the shelf to localized away from the primary glacial depocenter over ∼300–780 kyrs, following an order-of-magnitude increase in sediment accumulation rates. Simple Coulomb stress calculations show that the suppression of faulting is partially controlled by the change in sediment accumulation rates which created a differential pore pressure regime between the underlying, faulted strata and the overlying, undeformed sediments. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110088
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States; Department of Petroleum and Geosystems Engineering, University of Texas at Austin, Austin, TX, United States; Institute for Geophysics, University of Texas at Austin, Austin, TX, United States; Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom
Recommended Citation:
Worthington L.L.,Daigle H.,Clary W.A.,et al. High sedimentation rates and thrust fault modulation: Insights from ocean drilling offshore the St. Elias Mountains, southern Alaska[J]. Earth and Planetary Science Letters,2018-01-01,483