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Immiscible silicate-carbonate liquids as evidenced from ocellar diabase dykes, southeast Sinai

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Abstract

Diabase dykes containing spherical patches of carbonate intrude the Tarr albitite complex of SE Sinai. The morphology of these dykes indicates a highly gas-charged magma. Petrographic evidence points toward equilibrium during cooling of immiscible carbonate ocelli and silicate matrix. Dolomite is the main component of these ocelli, which are geochemically and isotopically similar to carbonatite. However, the low total REE content, and the presence of considerable marble in the country rock, suggest a process of stoping and melting of carbonate, followed by the “in situ” development of silicate-carbonate immiscibility.

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Authors and Affiliations

  1. Geological Survey of Israel, 30 Malkhei Israel St., Jerusalem, Israel

    R. Bogoch

  2. Isotope Department, Weizman Institute of Science, Rehovot, Israel

    M. Magaritz

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  1. R. Bogoch
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  2. M. Magaritz
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Bogoch, R., Magaritz, M. Immiscible silicate-carbonate liquids as evidenced from ocellar diabase dykes, southeast Sinai. Contr. Mineral. and Petrol. 83, 227–230 (1983). https://doi.org/10.1007/BF00371190

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  • DOI: https://doi.org/10.1007/BF00371190

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