J 2016

MAGNESIUM-RICH Na,Be,Li-rich SEKANINAITE FROM MIAROLITIC PEGMATITE AT ZIMNIK, STRZEGOM-SOBOTKA MASSIF, SUDETES, POLAND

GADAS, Petr, Milan NOVÁK, Adam SZUSZKIEWICZ, E. SZELEG, Michaela VAŠINOVÁ GALIOVÁ et. al.

Basic information

Original name

MAGNESIUM-RICH Na,Be,Li-rich SEKANINAITE FROM MIAROLITIC PEGMATITE AT ZIMNIK, STRZEGOM-SOBOTKA MASSIF, SUDETES, POLAND

Authors

GADAS, Petr (203 Czech Republic, guarantor, belonging to the institution), Milan NOVÁK (203 Czech Republic, belonging to the institution), Adam SZUSZKIEWICZ (616 Poland), E. SZELEG (616 Poland), Michaela VAŠINOVÁ GALIOVÁ (203 Czech Republic) and Jakub HAIFLER (203 Czech Republic, belonging to the institution)

Edition

Canadian Mineralogist, QUEBEC, MINERALOGICAL ASSOC CANADA, 2016, 0008-4476

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Canada

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 0.817

RIV identification code

RIV/00216224:14310/16:00094979

Organization unit

Faculty of Science

DOI

UT WoS

000402273000011

Keywords in English

sekaninaite; EMPA; LA-ICP-MS; Raman spectroscopy; miarolitic granitic pegmatite; hydrothermal alteration; Zimnik; Strzegom-Sobotka massif

Tags

Tags

International impact, Reviewed
Změněno: 13/4/2018 14:25, Ing. Nicole Zrilić

Abstract

V originále

Two distinct types of sekaninaite were found in zoned, miarolitic NYF pegmatites at Zimnik, Strzegom-Sobotka granitic massif: (1) graphic intergrowths of sekaninaite I (Sek-I) with quartz, up to similar to 5 cm in size, from a graphic unit are completely replaced by a fine-grained mixture of muscovite, chlorite, minor K-feldspar, albite, calcite, and rare secondary beryl; (2) columnar to conic subhedral crystals and irregular grains, up to 6 cm in size, of grey-violet to brownish sekaninaite II (Sek-II) occur in a blocky unit. Sek-II is partly replaced by biotite, muscovite, chlorite, schorl, and minor to trace zinnwaldite, beryl, albite, fluorapatite, calcite, topaz, and several accessory Nb, Ta, Ti-oxides and sulfides, and late smectite. Rather heterogeneous Sek-II (Sek(71-75)MnCrd(23-28)Crd(1-2)) has high contents of Mn (up to 0.54 apfu; 5.76 wt.% MnO) and Na (0.28-0.35 apfu; 1.32-1.63 wt.% Na2O). It is significantly enriched in Li (0.12-0.18 apfu; 0.27-0.40 wt.% Li2O) and Be (0.15-0.25 apfu; 0.55-0.94 wt.% BeO) via the substitutions (Ch)(Na+K+Rb) + Li-VI = (Ch)(sic) + R-VI(2+) and (Ch)(Na+K+Rb) + Be-IV = (Ch)(sic) + Al-IV. Sek-II has the highest content of Mn ever found in natural cordierite-group minerals, along with almost no Mg (similar to 0.01 apfu) and also high concentrations of Li and Be. The composition of Sek-II suggests low-pressure conditions of crystallization at similar to 1-2 kbar.

Links

GA14-13347S, research and development project
Name: Variabilita lehkých prvků (Li, Be, B) ve vybraných horninotvorných a akcesorických minerálech z felsických magmatických a metamorfovaných hornin
Investor: Czech Science Foundation
LQ1601, research and development project
Name: CEITEC 2020 (Acronym: CEITEC2020)
Investor: Ministry of Education, Youth and Sports of the CR