DOI: 10.1029/2018JE005644
Scopus记录号: 2-s2.0-85053388937
论文题名: Ice in Micro Cold Traps on Mercury: Implications for Age and Origin
作者: Rubanenko L. ; Mazarico E. ; Neumann G.A. ; Paige D.A.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 8 起始页码: 2178
结束页码: 2191
语种: 英语
英文关键词: comet
; ices
; Mercury
; MESSENGER
; polar volatiles
英文摘要: Evidence in radar, reflectance, and visible imagery indicates that surface and subsurface water ice is present inside permanently shadowed regions in the north polar region of Mercury. The origin of this ice and the time at which it was delivered to the planet are both unknown. Finding the smallest, most easily eroded ice deposits on Mercury can help answer these questions. Here we present evidence for volatiles trapped in cold traps of scales ∼ 1–10 m. We consider two possible delivery methods for these deposits: a gradual, slow accumulation by micrometeorites or solar wind implantation and an episodic deposition, either primordial or by a recent comet impact. We conclude that the mechanism that best explains the presence of volatiles in these micro cold traps is a comet impact that most likely occurred in the last ∼ 100 Ma. ©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/113420
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Rubanenko L.,Mazarico E.,Neumann G.A.,et al. Ice in Micro Cold Traps on Mercury: Implications for Age and Origin[J]. Journal of Geophysical Research: Planets,2018-01-01,123(8)