| Reference Type | Journal (article/letter/editorial) |
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| Title | On aluminous and edenitic hornblendes |
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| Journal | Mineralogical Magazine |
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| Authors | Leake, Bernard E. | Author |
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| Year | 1971 (December) | Volume | 38 |
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| Page(s) | 389-407 | Issue | 296 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_38/38-296-389.pdf+ |
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| DOI | doi:10.1180/minmag.1971.038.296.01Search in ResearchGate |
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| Mindat Ref. ID | 6497 | Long-form Identifier | mindat:1:5:6497:6 |
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| GUID | f3b07984-7a59-4713-8f69-e88901ae9ecb |
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| Full Reference | Leake, Bernard E. (1971) On aluminous and edenitic hornblendes. Mineralogical Magazine, 38 (296) 389-407 doi:10.1180/minmag.1971.038.296.01 |
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| Plain Text | Leake, Bernard E. (1971) On aluminous and edenitic hornblendes. Mineralogical Magazine, 38 (296) 389-407 doi:10.1180/minmag.1971.038.296.01 |
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| In | (1971, December) Mineralogical Magazine Vol. 38 (296) Mineralogical Society |
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| Abstract/Notes | SummaryBased on nearly 1500 published amphibole analyses the maximum possible Alvi in hornblendes is shown to increase with increase of Aliv. New analyses of hornblendes from amphibole-corundum rocks, with and without anorthite, are given and after critical examination of the available data it is concluded that the maximum verified Alvi-rich calciferous amphibole that approaches the closest to hypothetical tschermakite comes from a kyanite-bearing aluminous high-pressure-crystallized schist from Lukmanier, Switzerland. Pure natural edenite or ferroedenite is unknown, but a new analysis of the nearest known natural edenite, from Mysore, India, agrees with the postulated view that extraordinarily low temperatures are needed for edenite-ferroedenite crystallization, much below that possible in magmas and only rarely achieved in metamorphic rocks containing amphiboles. The limit of the approach of igneous hornblendes to edenite-ferroedenite and tremolite-ferroactinolite is outlined.At least 1100 °C is required for complete expulsion of water from some amphiboles. |
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