Abstract
RECENTLY, Weedon1 has argued that the presence of corona structures surrounding olivines in the Aberdeenshire gabbros implies a low pressure of crystallization, equivalent to a depth of burial of less than 9 km, and comments that this is inconsistent with published views on the time of emplacement and depth of burial of the gabbro masses, Weedon's argument rests on two assumptions: that the suppression of an olivine–liquid reaction relationship in the system MgO–SiO2 by increasing pressure is an accurate indicator of the behaviour of the olivine–liquid relationship in basic magma, and that the corona structures described from the gabbros indicate crystal–liquid reaction, not solid–solid reaction after consolidation.
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O'HARA, M., STEWART, F. Olivine–Liquid Reaction and the Depth of Crystallization of the East Aberdeenshire Gabbros. Nature 210, 830–831 (1966). https://doi.org/10.1038/210830a0
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DOI: https://doi.org/10.1038/210830a0
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