DOI: 10.1002/2014GL062121
论文题名: Venus: Interpreting the spatial distribution of volcanically modified craters
作者: O'Rourke J.G. ; Wolf A.S. ; Ehlmann B.L.
刊名: Geophysical Research Letters
ISSN: 0094-9507
EISSN: 1944-9238
出版年: 2014
卷: 41, 期: 23 起始页码: 8252
结束页码: 8260
语种: 英语
英文关键词: Venus
Scopus关键词: Intelligent systems
; Spatial distribution
; Volcanoes
; Impact cratering
; Impact craters
; Lava flows
; Magmatisms
; Mantle plume
; Size-frequency distributions
; Thin flow
; Venus
; Monte Carlo methods
; crater
; geological time
; lava flow
; mantle
; size distribution
; spatial distribution
; Venus
; volcanism
英文摘要: To understand the impact cratering record on Venus, we investigate two distinct resurfacing styles: localized, thin flows and large shield volcanoes. We statistically analyze the size-frequency distribution of volcanically modified craters and, using Monte Carlo simulations, their spatial distribution. Lava flows partially fill most craters, darkening their floors in radar images. We find that a model featuring localized, thin flows occurring throughout geologic time predicts their observed distribution. Individual flows may be morphologically indistinguishable, but, combined, they cover large provinces. Recent mantle plumes may drive a small amount of hot spot magmatism that produces the observed clusters of large shield volcanoes and obviously embayed craters. Ultimately, our analysis demonstrates that two styles of volcanism are needed to explain the observed properties of impact craters and that catastrophic resurfacing is not required. Key PointsProducing the modern cratering record on Venus requires two types of volcanismThin, morphologically similar flows dominate and tall volcanoes are secondaryNoncatastrophic processes can explain the distribution of modified craters ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921539242&doi=10.1002%2f2014GL062121&partnerID=40&md5=d09c71da3d0193546cad23908235292d
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6771
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
O'Rourke J.G.,Wolf A.S.,Ehlmann B.L.. Venus: Interpreting the spatial distribution of volcanically modified craters[J]. Geophysical Research Letters,2014-01-01,41(23).