| Reference Type | Journal (article/letter/editorial) |
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| Title | Radioelement geochemistry of Irish granites |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | O'Connor, Patrick J. | Author |
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| Year | 1981 (December) | Volume | 44 |
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| Issue | 336 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_44/44-336-485.pdf+ |
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| DOI | doi:10.1180/minmag.1981.044.336.14Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3307 | Long-form Identifier | mindat:1:5:3307:1 |
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| GUID | 0 |
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| Full Reference | O'Connor, Patrick J. (1981) Radioelement geochemistry of Irish granites. Mineralogical Magazine, 44 (336) 485-495 doi:10.1180/minmag.1981.044.336.14 |
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| Plain Text | O'Connor, Patrick J. (1981) Radioelement geochemistry of Irish granites. Mineralogical Magazine, 44 (336) 485-495 doi:10.1180/minmag.1981.044.336.14 |
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| In | (1981, December) Mineralogical Magazine Vol. 44 (336) Mineralogical Society |
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| Abstract/Notes | AbstractData for U, Th, and K, determined by neutron activation analysis, in 128 rock samples from 14 Irish Caledonian and Tertiary granite plutons are sum-marized. Irish Newer Caledonian granites (ninety-four samples) have values of radioelements (average 3.6 ppm U, 12.1 ppm Th, and 3.4% K) consistent with derivation from a source of broadly uniform composition. U mineralization occurs in the voluminous and forcefully emplaced Main Donegal and Leinster plutons whereas smaller passively emplaced granites (Galway, Barnesmore, Rosses) lack mineralization. Irish Tertiary granites (thirty-four samples), which represent small batches of highly fractionated acid magmas, show moderate or high radioelement contents (11.5 ppm U, 39.9 ppm Th, 4.5% K) but are not mineralized. It is concluded that the use of elevated radioelement contents as a criterion of granite ‘fertility’ may be misleading in the British Isles Caledonian Province. The radioelement chemistry of granites may reflect their source composition more closely than expected for differentiated and/or contaminated acid melts. |
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