DOI: 10.1002/grl.50831
论文题名: Flexural versus dynamic processes of subsidence in the North American Cordillera foreland basin
作者: Painter C.S. ; Carrapa B.
刊名: Geophysical Research Letters
ISSN: 0094-8668
EISSN: 1944-8399
出版年: 2013
卷: 40, 期: 16 起始页码: 4249
结束页码: 4253
语种: 英语
英文关键词: dynamic subsidence
; flexure
; North American Cordillera
; Sevier foreland basin
Scopus关键词: Driving dynamics
; Dynamic loadings
; Dynamic subsidences
; Flexural analysis
; flexure
; Foreland basin
; North American
; Subducting plate
; Dynamic loads
; Rigidity
; Subsidence
; Cretaceous
; data set
; foreland basin
; paleoenvironment
; subduction zone
; viscous flow
; North America
; United States
; Wyoming
英文摘要: Dynamic subsidence related to subduction is an important process in retroarc foreland basin systems. Dynamic subsidence in the North American retroarc foreland has been proposed as dominant in the Late Cretaceous; however, questions remain about the nature of the subcrustal load and the basin response to such processes. We present new isopach data using 130 data points covering a large portion of the U.S. and a revised flexural analysis of the Sevier foreland. Higher rigidity associated with the Wyoming craton can best model flexural subsidence directly prior to ~81 Ma. We constrain the transition from flexural to nonflexural subsidence to ~81 Ma and correlate this with large Late Cretaceous progradation. The locus of subsidence and the location of the subducted Shatsky oceanic plateau suggest that dynamic loading from viscous flow above the subducting plate is the mechanism driving dynamic subsidence in the retroarc foreland basin of the North American Cordillera. Key Points Isopachs constrain transition from flexural to non-flexural subsidence Flexural model tests rigidity of the Wyoming Province Dynamic processes responsible for non-flexural subsidence. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882747361&doi=10.1002%2fgrl.50831&partnerID=40&md5=1855711c04c0c8155a254e2cde1fd57e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5932
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geosciences, University of Arizona, 1040 E. 4th St., Tucson, AZ 85721, United States
Recommended Citation:
Painter C.S.,Carrapa B.. Flexural versus dynamic processes of subsidence in the North American Cordillera foreland basin[J]. Geophysical Research Letters,2013-01-01,40(16).