globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069412
Widespread effusive volcanism on Mercury likely ended by about 3.5 Ga
Author: Byrne P.K.; Ostrach L.R.; Fassett C.I.; Chapman C.R.; Denevi B.W.; Evans A.J.; Klimczak C.; Banks M.E.; Head J.W.; Solomon S.C.
Source Publication: Geophysical Research Letters
ISSN: 0094-8872
EISSN: 1944-8603
Publishing Year: 2016
Volume: 43, Issue:14
pages begin: 7408
pages end: 7416
Language: 英语
Keyword: crater size-frequency distributions ; global contraction ; impact cratering ; Mercury ; volcanism
Scopus Keyword: Deposits ; Gallium ; Mercury (metal) ; Volcanoes ; Crater sizes ; Effusive volcanisms ; Frequency Analysis ; Frequency distributions ; Impact cratering ; Production function ; Production rates ; volcanism ; Mercury deposits ; contraction ; cratering ; hypothesis testing ; Mercury (planet) ; temporal analysis ; volcanism
English Abstract: Crater size–frequency analyses have shown that the largest volcanic plains deposits on Mercury were emplaced around 3.7 Ga, as determined with recent model production function chronologies for impact crater formation on that planet. To test the hypothesis that all major smooth plains on Mercury were emplaced by about that time, we determined crater size–frequency distributions for the nine next-largest deposits, which we interpret also as volcanic. Our crater density measurements are consistent with those of the largest areas of smooth plains on the planet. Model ages based on recent crater production rate estimates for Mercury imply that the main phase of plains volcanism on Mercury had ended by ~3.5 Ga, with only small-scale volcanism enduring beyond that time. Cessation of widespread effusive volcanism is attributable to interior cooling and contraction of the innermost planet. ©2016. American Geophysical Union. All Rights Reserved.
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Document Type: 期刊论文
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Affiliation: Planetary Research Group, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University at Raleigh, Raleigh, NC, United States

Recommended Citation:
Byrne P.K.,Ostrach L.R.,Fassett C.I.,et al. Widespread effusive volcanism on Mercury likely ended by about 3.5 Ga[J]. Geophysical Research Letters,2016-01-01,43(14).
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