| Reference Type | Journal (article/letter/editorial) |
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| Title | Resetting of the Rb–Sr whole-rock isotope system of an Ordovician microgranite during Devonian low-grade metamorphism |
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| Journal | Geological Magazine |
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| Authors | Evans, J. A. | Author |
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| Year | 1989 (November) | Volume | 126 |
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| Issue | 6 |
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| Publisher | Cambridge University Press (CUP) |
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| DOI | doi:10.1017/s0016756800006968Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 254447 | Long-form Identifier | mindat:1:5:254447:6 |
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| GUID | 0 |
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| Full Reference | Evans, J. A. (1989) Resetting of the Rb–Sr whole-rock isotope system of an Ordovician microgranite during Devonian low-grade metamorphism. Geological Magazine, 126 (6) 675-679 doi:10.1017/s0016756800006968 |
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| Plain Text | Evans, J. A. (1989) Resetting of the Rb–Sr whole-rock isotope system of an Ordovician microgranite during Devonian low-grade metamorphism. Geological Magazine, 126 (6) 675-679 doi:10.1017/s0016756800006968 |
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| In | (1989, November) Geological Magazine Vol. 126 (6) Cambridge University Press (CUP) |
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| Abstract/Notes | AbstractThe Bwlch y Cywion microgranite intrudes an Ordovician sedimentary sequence in northeast Snowdonia, North Wales. Its age is recorded by hornfelses within its metamorphic aureole which give an Ordovician age of 454 ± 20 Ma. The whole-rock Rb–Sr isotope systems of the intrusion, however, and of an associated ash-flow tuff and a rhyolite of the Llewelyn Volcanic Group (Caradoc), were reset during low-grade metamorphism and give Devonian ages of 392±11 Ma, 392±5 Ma, and 405 ± 6 Ma, respectively. |
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