| Reference Type | Journal (article/letter/editorial) |
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| Title | Mineralogy of the Lake zone, Thor Lake rare-metals deposit, N.W.T., Canada |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Pinckston, D. Robert | Author |
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| Smith, Dorian G. W. | Author |
| Year | 1995 (April 1) | Volume | 32 |
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| Issue | 4 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e95-044Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 482646 | Long-form Identifier | mindat:1:5:482646:4 |
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| GUID | 0 |
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| Full Reference | Pinckston, D. Robert, Smith, Dorian G. W. (1995) Mineralogy of the Lake zone, Thor Lake rare-metals deposit, N.W.T., Canada. Canadian Journal of Earth Sciences, 32 (4) 516-532 doi:10.1139/e95-044 |
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| Plain Text | Pinckston, D. Robert, Smith, Dorian G. W. (1995) Mineralogy of the Lake zone, Thor Lake rare-metals deposit, N.W.T., Canada. Canadian Journal of Earth Sciences, 32 (4) 516-532 doi:10.1139/e95-044 |
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| In | (1995, April) Canadian Journal of Earth Sciences Vol. 32 (4) Canadian Science Publishing |
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| Abstract/Notes | The Proterozoic (ca. 2.1 Ga) Blatchford Lake suite hosts significant concentrations of rare metals at the core of a peralkaline granite–syenite pluton. After emplacement of the Grace Lake Granite and the Thor Lake Syenite within it, bodies of nepheline syenite, ijolite, and urtite were intruded beneath the present-day Lake zone. This is the largest of five zones of mineralization and lies close to the apex of the Thor Lake Syenite, a region which was then subjected to albitization, microclinization, and, finally, rare-metal mineralization. The underlying silica-undersaturated rocks contain clots of rare-metal-bearing minerals, including cerianite-(Ce), britholite-(Ce), thorite, and calcium catapleiite, interstitial to nepheline and aegirine. The Lake zone itself contains major quantities of Zr (in zircon), Nb (in ferrocolumbite, pyrochlore group minerals, aeschynite group minerals, and fergusonite-(Y)), and Ce (in allanite-(Ce), monazite-(Ce), and bastnäsite group minerals). Lesser amounts of Ta, Y, heavy rare earth elements, U, Th, and Ga are also present, mainly as minor components of rare-metal-bearing minerals. Electron microprobe analyses of the major rare-metal-bearing minerals are presented. |
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