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Impact induced dehydration of serpentine and the evolution of planetary atmospheresResults of shock recovery experiments carried out on antigorite serpentine Mg3Si2O5(OH)4 are reported. The main objective of the present study is the determination of critical shock pressures for partial and complete dehydration of serpentine under shock loading. It is pointed out that serpentine and serpentine-like layer silicates are the major water-bearing phases in carbonaceous chondrites. It appears that these minerals, and a poorly defined cometary contribution, were the most likely water-bearing phases in accreting planetesimals which led to the formation of the terrestrial planets. The obtained results imply that the process of impact induced devolatilization of volatile bearing minerals during accretion is likely to have occurred on earth. The findings lend support to the model of a terrestrial atmosphere/hydrosphere forming during the later stages of accretion of the earth.
Document ID
19830034156
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lange, M. A.
(California Inst. of Tech. Pasadena, CA, United States)
Ahrens, T. J.
(California Institute of Technology Pasadena, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 15, 1982
End Date: March 19, 1982
Accession Number
83A15374
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-105
Distribution Limits
Public
Copyright
Other

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