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Plagiogranites as late-stage immiscible liquids in ophiolite and mid-ocean ridge suites - An experimental studyA study of relationships between basic and acidic rocks was made by fractionating primitive basalt at low pressure anhydrous conditions at various fugacities. Fractionally crystallized basalt became increasingly enriched in iron which became silicate liquid immiscible, producing Fe-enriched basaltic and granitic liquids. The latter is similar to plagiogranites found in mid-oceanic rift (MOR) regions, showing that silicate liquid immiscibility could be the petrogenic process which produces plagiogranites in some MOR regions and ophiolites. The major problem in considering plagiogranites as products of silicate liquid immiscibility is absence of any description of the Fe-enriched conjugate liquid in the ophiolite or MOR literature, and the identification of this magma is essential for a definite case of silicate liquid immiscibility.
Document ID
19800026500
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dixon, S.
(Brown Univ. Providence, RI, United States)
Rutherford, M. J.
(Brown University Providence, R.I., United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1979
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 45
Issue: 1, Oc
Subject Category
Geophysics
Accession Number
80A10670
Funding Number(s)
CONTRACT_GRANT: NGR-40-002-123
Distribution Limits
Public
Copyright
Other

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