Magma mixing; the Marsco Suite, Isle of Skye, Scotland

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Authors:Vogel, Thomas A.; Younker, Leland W.; Wilband, J. T.; Kampmueller, Elaine
Author Affiliations:Primary:
Mich. State Univ., Dep. Geol., East Lansing, MI, United States
Other:
Lawrence Livermore Natl. Lab., United States
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 87(3), p.231-241. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999
Publication Date:1984
Note:In English. 50 refs.; illus. incl. sect., geol. sketch map
Summary:The Marsco suite is ideal for an evaluation of the magma mixing process because it is a classic example of mixing of diverse magma types, and because compositionally diverse, coexisting liquids were present throughout the area. Chemical data for the Marsco suite fit a mixing model remarkably well and show that mixing did not take place at the present level of exposure. Based on the Marsco suite, a similar occurrence at Ardnamurchan, Scotland, and experimental data, it is concluded that mixing was dominantly mechanical and efficient enough to allow diffusional processes to homogenize the liquids. It is postulated that injection of mafic magma into the base of a silicic magma system leads to mixing and mobilization of the system. The mechanical interaction that produces mixing also leads to disruption of the system. Liquids mixed at depth are mobilized and coexist at shallower levels. Major-element ICP analyses (15) of the Marsco suite are presented, with 15 trace-element analyses of the same suite. [P.Br.]
Subjects:Chemical composition; Density; Injection; Magmas; Melts; Mineral composition; Mixing; P-T conditions; Petrology; Phase equilibria; Phenocrysts; Silicates; Trace elements; Viscosity; Europe; Great Britain; Hebrides; Highland region Scotland; Inner Hebrides; Inverness-shire Scotland; Isle of Skye; Scotland; United Kingdom; Western Europe; Ardnamurchan Suite; Evolution; Marsco Suite; Marscoite
Coordinates:N570000 N574000 W0054000 W0064500
Abstract Numbers:85M/3332
Record ID:1985030642
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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