气候变化领域集成服务门户(CCPortal): Brine Migration and Impact-Induced Cryovolcanism on Europa

CCPortal

DOI	10.1029/2020GL090797
	Brine Migration and Impact-Induced Cryovolcanism on Europa
	Steinbrügge G.; Voigt J.R.C.; Wolfenbarger N.S.; Hamilton C.W.; Soderlund K.M.; Young D.A.; Blankenship D.D.; Vance S.D.; Schroeder D.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Despite evidence for plumes on Jupiter's moon Europa, no surface features have been definitively identified as the source of the plumes to date. Furthermore, it remains unknown whether the activity originates from near-surface water reservoirs within the ice shell or if it is sourced from the underlying global ocean. Here we investigate brine pocket migration, studied previously in the context of sea ice on Earth, as a process for transporting brine along thermal gradients. We show that the fracture system located in the center of Europa's Manannán crater is consistent with the formation of a subsurface brine reservoir. After the initial impact, residual aqueous melt concentrated via brine pocket migration as the target material cooled. Freezing and overpressurization then resulted in a cryovolcanic eruption. The volume of the emptied reservoir and the critical composition at the end of migration provide further constraints on the average salinity of Europa's ice shell. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Reservoirs (water); Sea ice; Critical composition; Cryovolcanism; Fracture systems; Global ocean; Near surfaces; Overpressurization; Surface feature; Target materials; Surface waters; brine; crater; Europa; global ocean; induced response; Jupiter; Moon; plume; sea ice; volcanic eruption; volcanism
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169480
作者单位	Department of Geophysics, Stanford University, Stanford, CA, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Institute for Geophysics, Jackson School of Geosciences, University of Austin at Texas, Austin, TX, United States; Jet Propulsion Laboratory, California Institute for Technology, Pasadena, CA, United States; Department of Electrical Engineering, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Steinbrügge G.,Voigt J.R.C.,Wolfenbarger N.S.,et al. Brine Migration and Impact-Induced Cryovolcanism on Europa[J],2020,47(21).
APA	Steinbrügge G..,Voigt J.R.C..,Wolfenbarger N.S..,Hamilton C.W..,Soderlund K.M..,...&Schroeder D.M..(2020).Brine Migration and Impact-Induced Cryovolcanism on Europa.Geophysical Research Letters,47(21).
MLA	Steinbrügge G.,et al."Brine Migration and Impact-Induced Cryovolcanism on Europa".Geophysical Research Letters 47.21(2020).