DOI: 10.1002/2016GL069220
论文题名: Recent tectonic activity on Pluto driven by phase changes in the ice shell
作者: Hammond N.P. ; Barr A.C. ; Parmentier E.M.
刊名: Geophysical Research Letters
ISSN: 0094-8906
EISSN: 1944-8637
出版年: 2016
卷: 43, 期: 13 起始页码: 6775
结束页码: 6782
语种: 英语
英文关键词: interior structure
; ocean
; Pluto
; subsurface
; tectonics
; thermal evolution
Scopus关键词: Oceanography
; Tectonics
; Thermal conductivity
; Interior structure
; ocean
; Pluto
; subsurface
; Thermal evolution
; Ice
英文摘要: The New Horizons spacecraft has found evidence for geologic activity on the surface of Pluto, including extensional tectonic deformation of its water ice bedrock see Moore et al. (2016). One mechanism that could drive extensional tectonic activity is global surface expansion due to the partial freezing of an ocean. We use updated physical properties for Pluto and simulate its thermal evolution to understand the survival of a possible subsurface ocean. For thermal conductivities of rock less than 3 W m−1 K−1, an ocean forms and at least partially freezes, leading to recent extensional stresses in the ice shell. In scenarios where the ocean freezes and the ice shell is thicker than 260 km, ice II forms and causes global volume contraction. Since there is no evidence for recent compressional tectonic features, we argue that ice II has not formed and that Pluto's ocean has likely survived to present day. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979885670&doi=10.1002%2f2016GL069220&partnerID=40&md5=35a9184b5dffba1feabafd6fdd8cbf26
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9869
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States
Recommended Citation:
Hammond N.P.,Barr A.C.,Parmentier E.M.. Recent tectonic activity on Pluto driven by phase changes in the ice shell[J]. Geophysical Research Letters,2016-01-01,43(13).