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Melt density and the average composition of basalt

Stolper, Edward and Walker, David (1980) Melt density and the average composition of basalt. Contributions to Mineralogy and Petrology, 74 (1). pp. 7-12. ISSN 0010-7999. doi:10.1007/BF00375484.

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Densities of residual liquids produced by low pressure fractionation of olivine-rich melts pass through a minimum when pyroxene and plagioclase join the crystallization sequence. The observation that erupted basalt compositions cluster around the degree of fractionation from picritic liquids corresponding to the density minimum in the liquid line of descent may thus suggest that the earth's crust imposes a density filter on the liquids that pass through it, favoring the eruption of the light liquids at the density minimum over the eruption of denser more fractionated and less fractionated liquids.

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URLURL TypeDescription DOIArticle
Stolper, Edward0000-0001-8008-8804
Additional Information:© 1980 Springer-Verlag. Received January 31, 1980; Accepted June 24, 1980. Soon after the preparation of this manuscript, we discovered that Sparks and his coworkers had independently noted the density vs. fractionation trend discussed in this manuscript. We thank them for the opportunity to see their manuscript prior to publication. This work was supported by NSF grants OCE 79-09699, EAR 79-06321, EAR 79-23977, NASA grant NGL-22-007-247, and the Committee on Experimental Geology and Geophysics of Harvard University. Contribution Number 3392, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125. A portion of this research was done while D. Walker was a visiting Scientist at the Lunar and Planetary Institute which is operated by the Universities Space Research Association under Contract No. NASW-3389 with NASA. This paper is Lunar and Planetary Institute Contribution No. 411.
Funding AgencyGrant Number
NSFOCE 79-09699
NSFEAR 79-06321
NSFEAR 79-23977
Harvard University Committee on Experimental Geology and GeophysicsUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences3392
Lunar and Planetary Institute411
Issue or Number:1
Record Number:CaltechAUTHORS:20120822-092533236
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ID Code:33439
Deposited By: Tony Diaz
Deposited On:22 Aug 2012 16:39
Last Modified:09 Nov 2021 21:34

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