| Reference Type | Journal (article/letter/editorial) |
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| Title | Epidotes of the Borrowdale Volcanic rocks of central Borrowdale |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | Strens, R. G. J. | Author |
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| Year | 1964 (June) | Volume | 33 |
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| Issue | 265 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_33/33-265-868.pdf+ |
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| DOI | doi:10.1180/minmag.1964.033.265.04Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 5798 | Long-form Identifier | mindat:1:5:5798:5 |
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| GUID | 0 |
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| Full Reference | Strens, R. G. J. (1964) Epidotes of the Borrowdale Volcanic rocks of central Borrowdale. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (265) 868-886 doi:10.1180/minmag.1964.033.265.04 |
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| Plain Text | Strens, R. G. J. (1964) Epidotes of the Borrowdale Volcanic rocks of central Borrowdale. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (265) 868-886 doi:10.1180/minmag.1964.033.265.04 |
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| In | (1962) Mineralogical Magazine Vol. 33 (265) Mineralogical Society |
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| Abstract/Notes | SummaryEpidote and clinozoisite are widely distributed in the andesitic lavas and tuffs of the Borrowdale Volcanic Series. Four main types of occurrence may be distinguished, namely quartz-epidote vein fillings; ‘Shap type’ veins, bordered by pink reaction zones rich in SiO2, Na2O, and K2O; autometasomatized lavas and tuffs; and tuffs subjected to alkali metasomatism. Epidote alone formed in the quartz-epidote veins; clinozoisite is found with epidote in the other types of occurrence.Epidote and clinozoisite formed in vesicles at pressures of 10–280 kg/cm2, at temperatures of 300–550° C; epidote associated with pre-Bala mineral veins formed in the range 130–550° C at 1000 kg/cm2; epidote around the Caledonian granites probably formed up to 600° C at about 2000 kg/cm2. Clinozoisite crystallized together with epidote in the vesicles, demonstrating a gap in the clinozoisite-epidote solid solution series. Early formed epidote in vesicles is more strongly coloured than late epidote, although the compositions of the earliest and latest fractions are identical. |
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