Publication details
Chemická variabilita minerálů skupiny hancockit-epidot-epidot-(Sr) z Franklinu, Sussex, New Jersey, USA
| Title in English | Chemical variability of hancockite-epidote-epidote-(Sr) minerals from Franklin, Sussex, New Jersey, USA |
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| Authors | |
| Year of publication | 2021 |
| Type | Article in Periodical |
| Magazine / Source | Acta Musei Moraviae, Scientiae Geologicae |
| MU Faculty or unit | |
| Citation | |
| Web | http://scigeo.actamm.cz/cs/chemicka-variabilita-mineralu-skupiny-hancockit-epidot-epidot-sr-z-franklinu-sussex-new-jersey-usa/ |
| Keywords | electron microprobe; epidote; epidote-(Sr); Franklin; hancockite; substitutions; USA |
| Description | Epidote-group minerals from Franklin Sussex, New Jersey, USA, rich in Pb, Sr and Mn were studied in detail using electron microprobe. In a metamorphosed rock composed of epidote group minerals, andradite – grossular, Zn – rich phlogopite and rare baryte distinctly zoned crystals of epidote – epidote-(Sr)-hancockite were identified based on different Pb, Sr and Ca contents. Simple isomorphous and coupled substitution vectors were determined based on our results, one of them indicating presence of piemontite-(Pb) component tending to hypothetical ferripiemontite-(Pb) end-member. Generaly, epidote-group minerals from Franklin are Mn- and Sr-richer and Pb-depleted compared to other hancockite occurrences in the world. |