Reference Type | Journal (article/letter/editorial) |
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Title | K-Ar isotopic age determinations from some Lake District mineral localities |
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Journal | Geological Magazine |
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Authors | Ineson, P. R. | Author |
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Mitchell, J. G. | Author |
Year | 1974 (November) | Volume | 111 |
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Page(s) | 521-537 | Issue | 6 |
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Publisher | Cambridge University Press (CUP) |
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DOI | doi:10.1017/s0016756800041571Search in ResearchGate |
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| Generate Citation Formats |
Classification | Not set | LoC | Not set |
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Mindat Ref. ID | 250918 | Long-form Identifier | mindat:1:5:250918:5 |
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GUID | 0 |
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Full Reference | Ineson, P. R., Mitchell, J. G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111 (6). 521-537 doi:10.1017/s0016756800041571 |
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Plain Text | Ineson, P. R., Mitchell, J. G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111 (6). 521-537 doi:10.1017/s0016756800041571 |
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In | (1974, November) Geological Magazine Vol. 111 (6) Cambridge University Press (CUP) |
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Abstract/Notes | SummaryForty-seven new KāAr analyses are reported from 15 mines in the Lake District. Analyses of clay mineral concentrates from vein gouges and altered wallrock support a hypothesis of at least 3 distinct isotopic events. Caledonian ages (388 Ma) are reported from the Coniston Copper deposits, while the extensive mineralization in and around the Vale of Newlands indicates a metasomatic event occurring at around 360 Ma. The ages of the sporadic mineral localities to the E of the area (i.e. Greenside, Threlkeld, etc.) are grouped around 325 Ma while those of the Caldbeck Fell deposits are close to 230 Ma. An epidosic model may be advanced for the Carrock Fell Tungsten deposits with a range from 197 to 282 Ma. The geochronological significance of these and other previously published results is considered. |
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