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dc.contributor.author
Montenegro, Teresita Francis

dc.contributor.author
Wul, Julieta Gisele

dc.contributor.author
de Luchi López, Mónica
dc.contributor.author
Ribacki, Enrico
dc.contributor.author
Trumbull, Robert

dc.date.available
2022-10-28T10:10:01Z
dc.date.issued
2021-07-29
dc.identifier.citation
Montenegro, Teresita Francis; Wul, Julieta Gisele; de Luchi López, Mónica; Ribacki, Enrico; Trumbull, Robert; Chemical and boron isotope composition of tourmaline from pegmatites and their host rocks, Sierra de San Luis, Argentina; Mineralogical Association of Canada; Canadian Mineralogist; 59; 3; 29-7-2021; 467-494
dc.identifier.issn
0008-4476
dc.identifier.uri
http://hdl.handle.net/11336/175281
dc.description.abstract
We report chemical and B-isotope analyses of tourmaline from Ordovician S-type granites, an aplite, LCT-type (lithiumcesium- tantalum) pegmatites, and metamorphic rocks of the Conlara Metamorphic Complex (CMC) in Sierra de San Luis, Argentina. For comparison, tourmaline from three LCT pegmatites in the adjacent Pringles Metamorphic Complex was also studied. Metamorphic tourmaline from the CMC has intermediate schorl-dravite compositions, with variable Fe# [100∗Fe/(Fe Mg)] from 32 to 79. The d11B values range from -14.8 to -8.9%, which are typical values for continental metasediments and granites, ruling out a marine origin for the tourmalinite protoliths. Tourmaline from the S-type granites and aplite is more homogeneous, with Fe# from 48 to 60. The d11B range (-14 to -9.8%) of granitic tourmaline is within that of the metamorphic tourmaline, supporting the idea of boron recycling in the CMC during partial melting to form the granites. Tourmaline from CMC-hosted pegmatites is compositionally diverse and we distinguished three groups based on Fe#: Group 1: 42 to 50, Group 2: 50 to 62, and Group 3: 62 to 93. Regardless of strong variations in Fe#, tourmaline from all pegmatites in the CMC has d11B values from -10.3 to -7.8%. These values overlap with the range of related granites but are about 2 permil higher, which we attribute to crystallization of 10B-enriched minerals (mica and tourmaline) in the evolved magma from which the pegmatites formed. Pegmatites from the Pringles Metamorphic Complex contain tourmaline with a similar overall range of Fe# (45 to 84) as in the CMC but lower d11B values (-13.2 to -11.2%).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Mineralogical Association of Canada

dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BORON ISOTOPES
dc.subject
CONLARA AND PRINGLES METAMORPHIC COMPLEXES
dc.subject
PEGMATITE
dc.subject
SIMS
dc.subject
TOURMALINE
dc.subject
TOURMALINITE
dc.subject.classification
Geología

dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente

dc.subject.classification
CIENCIAS NATURALES Y EXACTAS

dc.title
Chemical and boron isotope composition of tourmaline from pegmatites and their host rocks, Sierra de San Luis, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-10-12T14:30:35Z
dc.journal.volume
59
dc.journal.number
3
dc.journal.pagination
467-494
dc.journal.pais
Canadá

dc.journal.ciudad
Toronto, Canada
dc.description.fil
Fil: Montenegro, Teresita Francis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil
Fil: Wul, Julieta Gisele. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
dc.description.fil
Fil: de Luchi López, Mónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geocronología y Geología Isotópica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geocronología y Geología Isotópica; Argentina
dc.description.fil
Fil: Ribacki, Enrico. Universitat Potsdam; Alemania
dc.description.fil
Fil: Trumbull, Robert. German Research Centre for Geosciences; Alemania
dc.journal.title
Canadian Mineralogist

dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3749/canmin.2000072
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/canmin/article-abstract/59/3/467/606434/Chemical-and-boron-isotope-composition-of
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