DENSITY OF BASIC ROCKS AT VERY HIGH PRESSURES
Journal Article
·
· Transactions of the American Geophysical Union (U.S.) Superseded by EOS, Trans., Am. Geophys. Union
The densities of two gabbros and one dunite have been measured at several pressures in the range from 150 to 750 kilobars (1 kilobar = 986.9 atmospheres). These pressures were attained in shock fronts generated by high explosives. The densities were computed frozen the observed shock waves. The dunite, initial density of 3.25 g/cc, was compressed to a density of about 4.9 g/ cc at 720 kilobars. The gabbros, inital density 3. 0 g/cc, were compressed to 5.0 g/cc at 750 kilobars. Both gabbros show evidence of a polymorphic transition at some pressure around 150 kilobars to a more dense, but less compressible phase. The agreement obtained from these data with a cruat of dunite 4OO kilometers thick underlain by a gabbroic rock with Bullen's Model A is very close. (auth)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-002365
- OSTI ID:
- 4316265
- Journal Information:
- Transactions of the American Geophysical Union (U.S.) Superseded by EOS, Trans., Am. Geophys. Union, Journal Name: Transactions of the American Geophysical Union (U.S.) Superseded by EOS, Trans., Am. Geophys. Union Vol. Vol: 39; ISSN TAGUA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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