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Effects of selective fusion on the thermal history of the earth's mantle

Earth and Planetary Science Letters

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Abstract

A comparative study on the thermal history of the earth's mantle was made by numerical solutions of the heat equation including and excluding selective fusion of silicates. Selective fusion was approximated by melting in a multicomponent system and redistribution of radioactive elements. Effects of selective fusion on the thermal models are (1) lowering (by several hundred degrees centigrade) and stabilizing the internal temperature distribution, and (2) increasing the surface heat-flow. It was found that models with selective fusion gave results more compatible with observations of both present temperature and surface heat-flow. The results therefore suggest continuous differentiation of the earth's mantle throughout geologic time, and support the hypothesis that the earth's atmosphere, oceans, and crust have been accumulated throughout the earth's history by degassing and selective fusion of the mantle. ?? 1968.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of selective fusion on the thermal history of the earth's mantle
Series title:
Earth and Planetary Science Letters
Volume
4
Issue:
4
Year Published:
1968
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Earth and Planetary Science Letters
First page:
270
Last page:
276
Number of Pages:
7