| DOI: | 10.1002/2016GL071050
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| 论文题名: | Correlating laser-generated melts with impact-generated melts: An integrated thermodynamic-petrologic approach |
| 作者: | Hamann C.; Luther R.; Ebert M.; Hecht L.; Deutsch A.; Wünnemann K.; Schäffer S.; Osterholz J.; Lexow B.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8491
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| EISSN: | 1944-8222
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| 出版年: | 2016
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| 卷: | 43, 期:20 | | 起始页码: | 10602
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| 结束页码: | 10610
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| 语种: | 英语
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| 英文关键词: | hypervelocity impact
; impact experiments
; impact melts
; laser ablation
; numerical modeling
; petrology
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| Scopus关键词: | Continuous wave lasers
; Entropy
; Irradiation
; Laser ablation
; Melting
; Numerical models
; Petrology
; Solar system
; Temperature measurement
; High speed imaging
; Hypervelocity impacts
; Impact experiment
; Impact melt
; Iron meteorites
; Petrogenetic process
; Thermodynamic state
; Velocity range
; Meteor impacts
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| 英文摘要: | Planetary collisions in the solar system typically induce melting and vaporization of the impactor and a certain volume of the target. To study the dynamics of quasi-instantaneous melting and subsequent quenching under postshock P-T conditions of impact melting, we used continuous-wave laser irradiation to melt and vaporize sandstone, iron meteorite, and basalt. Using high-speed imaging, temperature measurements, and petrologic investigations of the irradiation targets, we show that laser-generated melts exhibit typical characteristics of impact melts (particularly ballistic ejecta). We then calculate the entropy gains of the laser-generated melts and compare them with the entropy gains associated with the thermodynamic states produced in hypervelocity impacts at various velocities. In conclusion, our experiments extend currently attainable postshock temperatures in impact experiments to ranges commensurate with impacts in the velocity range of 4–20 km s–1 and allow to study timescales and magnitudes of petrogenetic processes in impact melts. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995611837&doi=10.1002%2f2016GL071050&partnerID=40&md5=f6e08c02266bb70672a3da3c0ad06e89
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9454
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| 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: | Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Germany
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| Recommended Citation: | |
Hamann C.,Luther R.,Ebert M.,et al. Correlating laser-generated melts with impact-generated melts: An integrated thermodynamic-petrologic approach[J]. Geophysical Research Letters,2016-01-01,43(20).
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