DOI: 10.1029/2018JE005543
Scopus记录号: 2-s2.0-85049825286
论文题名: Episodes of Aqueous Flooding and Effusive Volcanism Associated With Hrad Vallis, Mars
作者: Hamilton C.W. ; Mouginis-Mark P.J. ; Sori M.M. ; Scheidt S.P. ; Bramson A.M.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 6 起始页码: 1484
结束页码: 1510
语种: 英语
英文关键词: flood
; Hrad Vallis
; lahar
; lava
; Mars
; outflow channel
Scopus关键词: channel flow
; emplacement
; flooding
; lahar
; lava flow
; Mars
; outflow
; volcanism
英文摘要: Hrad Vallis is an Amazonian-age outflow channel located in the northwestern part of the Elysium Volcanic Province of Mars. The formation of Hrad Vallis may have been associated with catastrophic aqueous floods and volcanism, which makes determining its emplacement history important for constraining the planet's hydrological and thermal evolution during the Amazonian Period. Through geological mapping, geomorphologic analysis, and numerical simulations we assess whether Hrad Vallis formed in association with mudflows (i.e., lahars), effusive volcanism, or a combination of both processes. Among the three youngest flows in the region, the lower and upper flow units are inferred to be the products of catastrophic aqueous floods, whereas the middle unit is interpreted to be pāhoehoe-like lava flow formed through the process of inflation over the course of decades. The latter flow unit is similar to terrestrial lava-rise plateaus, but its emplacement may have involved interactions with surficial ice deposits, which affected the flow path and resulted in a range of lava-water interactions. We conclude that Hrad Vallis had a complex history involving episodes of both aqueous flooding and effusive volcanism and that the interactions between lava and ice in these regions may have generated ephemeral hydrothermal systems with potential astrobiological significance. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113732
Appears in Collections: 气候减缓与适应
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作者单位: Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Hawaii Institute of Geophysics and Planetology, University of Hawai‘i at Mānoa, Honolulu, HI, United States
Recommended Citation:
Hamilton C.W.,Mouginis-Mark P.J.,Sori M.M.,et al. Episodes of Aqueous Flooding and Effusive Volcanism Associated With Hrad Vallis, Mars[J]. Journal of Geophysical Research: Planets,2018-01-01,123(6)