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@article{1093555,
author = {Bacik, Peter and Uher, Pavel and Ertl, Andreas and Jonsson, Erik and Nysten, Per and Kanický, Viktor and Vaculovič, Tomáš},
article_location = {QUEBEC},
article_number = {4},
doi = {http://dx.doi.org/10.3749/canmin.50.4.825},
keywords = {tourmaline; dravite; muscovite; zircon; xenotime-(Y); hydroxylbastnasite-(Ce); REE; EMPA; XRD; LA-ICP-MS; granitic pegmatite; Forshammar; Bergslagen; Sweden},
language = {eng},
issn = {0008-4476},
journal = {Canadian Mineralogist},
title = {ZONED REE-ENRICHED DRAVITE FROM A GRANITIC PEGMATITE IN FORSHAMMAR, BERGSLAGEN PROVINCE, SWEDEN: AN EMPA, XRD AND LA-ICP-MS STUDY},
url = {https://pubs.geoscienceworld.org/canmin/article-abstract/50/4/825/127375/Zoned-Ree-Enriched-Dravite-from-a-Granitic?redirectedFrom=fulltext},
volume = {50},
year = {2012}
}
TY - JOUR
ID - 1093555
AU - Bacik, Peter - Uher, Pavel - Ertl, Andreas - Jonsson, Erik - Nysten, Per - Kanický, Viktor - Vaculovič, Tomáš
PY - 2012
TI - ZONED REE-ENRICHED DRAVITE FROM A GRANITIC PEGMATITE IN FORSHAMMAR, BERGSLAGEN PROVINCE, SWEDEN: AN EMPA, XRD AND LA-ICP-MS STUDY
JF - Canadian Mineralogist
VL - 50
IS - 4
SP - 825-841
EP - 825-841
PB - MINERALOGICAL ASSOC CANADA
SN - 00084476
KW - tourmaline
KW - dravite
KW - muscovite
KW - zircon
KW - xenotime-(Y)
KW - hydroxylbastnasite-(Ce)
KW - REE
KW - EMPA
KW - XRD
KW - LA-ICP-MS
KW - granitic pegmatite
KW - Forshammar
KW - Bergslagen
KW - Sweden
UR - https://pubs.geoscienceworld.org/canmin/article-abstract/50/4/825/127375/Zoned-Ree-Enriched-Dravite-from-a-Granitic?redirectedFrom=fulltext
N2 - Green to grayish green tourmaline crystals (up to 10 cm across), with distinct optical zoning, occurs with quartz, blocky albite and muscovite in the Forshammar granitic pegmatite, central Bergslagen province, Sweden. Tourmaline contains inclusions of zircon and xenotime-(Y), and it is cut by veinlets of muscovite and hydroxylbastnasite-(Ce). Microanalytical and structural data (from the rim) indicate that the tourmaline can be classified as a dravite with moderate Al-Mg disorder at the Y and Z sites. Tourmaline displays chemical zoning that reflects the distribution of Fe, Mg, Al, Ca and Na. The Mg/(Mg+Fe) value is high; it decreases from core (similar to 0.85) to intermediate zone (0.76-0.79), but increases in the rim and vein dravite (0.93). The core has the highest proportion of X-site vacancy and Al content, whereas the intermediate zone is the most enriched in Fe and Na. The rim is slightly depleted in Al and has the highest Na compared to inner zones. Tourmaline veins crosscut the pre-existing tourmaline and are relatively more enriched in Na and Ca. The main compositional variations are driven by Al-X square Mg-1Na-1 and AlOMg-1(OH)(-1) substitutions. The Forshammar dravite shows the highest known concentrations of REE from pegmatite tourmaline, <= 1200 ppm REE, <= 210 ppm La, <= 670 ppm Ce; the chondrite-normalized patterns reveal high La-N/Yb-N (32 to 464) values and strongly negative Eu anomalies (Eu/Eu* = 0.005 to 0.05). The contents of Ti, Mn, Y and REE generally increase at the boundary of the intermediate zone and rim, whereas the contents of Zn, Ga and Sn decrease from the core to the rim.
ER -
BACIK, Peter, Pavel UHER, Andreas ERTL, Erik JONSSON, Per NYSTEN, Viktor KANICKÝ a Tomáš VACULOVIČ. ZONED REE-ENRICHED DRAVITE FROM A GRANITIC PEGMATITE IN FORSHAMMAR, BERGSLAGEN PROVINCE, SWEDEN: AN EMPA, XRD AND LA-ICP-MS STUDY. \textit{Canadian Mineralogist}. QUEBEC: MINERALOGICAL ASSOC CANADA, 2012, roč.~50, č.~4, s.~825-841. ISSN~0008-4476. Dostupné z: https://dx.doi.org/10.3749/canmin.50.4.825.
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