Mostrar el registro sencillo del ítem
dc.contributor.author
Pankhurst, Robert
dc.contributor.author
Rapela, Carlos Washington
dc.contributor.author
Fanning, Christopher Mark
dc.date.available
2020-08-31T17:07:20Z
dc.date.issued
2000-11
dc.identifier.citation
Pankhurst, Robert; Rapela, Carlos Washington; Fanning, Christopher Mark; Age and origin of coeval TTG, I- and S-type granites in the Famatinian belt of NW Argentina; Royal Society of Edinburgh; Transactions of the Royal Society of Edinburgh, Earth Sciences; 91; 1-2; 11-2000; 151-168
dc.identifier.issn
1755-6910
dc.identifier.uri
http://hdl.handle.net/11336/112780
dc.description.abstract
Three granitoid types are recognised in the Famatinian magmatic belt of NW Argentina, based on lithology and new geochemical data: (a) A minor trondhjemite-tonalite- granodiorite (TTG) group, (b) a metaluminous I-type gabbro-monzogranite suite, and (c) S-type granites. The latter occur as small cordieritic intrusions associated with I-type granodiorites and as abundant cordierite-bearing facies in large batholithic masses. Twelve new SHRIMP U-Pb zircon ages establish the contemporaneity of all three types in Early Ordovician times (mainly 470- 490 Ma ago). Sr- and Nd-isotopic data suggest that, apart from some TTG plutons of asthenospheric origin, the remaining magmas were derived from a Proterozoic crust-lithospheric mantle section. Trace element modelling suggests that the TTG originated by variable melting of a depleted gabbroid source at 10-12 kbar, and the I-type tonalite-granodiorite suite by melting of a more enriched lithospheric source at c. 5 kbar. The voluminous intermediate and acidic I-types involved hybridisation with lower and middle crustal melts. The highly peraluminous S-type granites have isotopic and inherited zircon patterns similar to those of Cambrian supracrustal metasedimentary rocks deposited in the Pampean cycle, and were derived from them by local anatexis. Other major components of the S-type batholiths involved melting of deep crust and mixing with the I-type magmas, leading to an isotopic and geochemical continuum.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Edinburgh
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANATEXIS
dc.subject
GEOCHEMISTRY
dc.subject
GONDWANA MARGIN
dc.subject
MODELLING
dc.subject
PALAEOZOIC
dc.subject
U-PB GEOCHRONOLOGY
dc.subject
ZIRCON
dc.subject.classification
Geoquímica y Geofísica
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Age and origin of coeval TTG, I- and S-type granites in the Famatinian belt of NW 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
2020-05-11T15:17:12Z
dc.identifier.eissn
0263-5933
dc.journal.volume
91
dc.journal.number
1-2
dc.journal.pagination
151-168
dc.journal.pais
Reino Unido
dc.journal.ciudad
Edimburgo
dc.description.fil
Fil: Pankhurst, Robert. British Geological Survey; Reino Unido
dc.description.fil
Fil: Rapela, Carlos Washington. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Fanning, Christopher Mark. The Australian National University; Australia
dc.journal.title
Transactions of the Royal Society of Edinburgh, Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1017/S0263593300007343
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh/article/age-and-origin-of-coeval-ttg-i-and-stype-granites-in-the-famatinian-belt-of-nw-argentina/2F960B5EA0C7A050E53831954E2A41A3
Archivos asociados