Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”

Metacarbonate rocks (pure and impure marbles, carbonate-silicate rocks, calc-silicate rocks and carbonate-bearing silicate rocks) form a very complex group within the metamorphic sequence of the Silgará Formation at the central Santander Massif (CSM). These rocks are interpreted as derived from a se...

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Autores:
Ríos, C.A.
Castellanos, O.M
Gómez, S.I.
Ávila, G.A.
Tipo de recurso:
Article of journal
Fecha de publicación:
2008
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/34004
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/34004
http://bdigital.unal.edu.co/24084/
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Atribución-NoComercial 4.0 Internacional
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oai_identifier_str oai:repositorio.unal.edu.co:unal/34004
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repository_id_str
dc.title.spa.fl_str_mv Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
spellingShingle Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title_short Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title_full Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title_fullStr Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title_full_unstemmed Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
title_sort Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”
dc.creator.fl_str_mv Ríos, C.A.
Castellanos, O.M
Gómez, S.I.
Ávila, G.A.
dc.contributor.author.spa.fl_str_mv Ríos, C.A.
Castellanos, O.M
Gómez, S.I.
Ávila, G.A.
description Metacarbonate rocks (pure and impure marbles, carbonate-silicate rocks, calc-silicate rocks and carbonate-bearing silicate rocks) form a very complex group within the metamorphic sequence of the Silgará Formation at the central Santander Massif (CSM). These rocks are interpreted as derived from a sedimentary sequence (including limestones and dolostones, carbonate-bearing mudstones,  sandstones, tuffaceous and evaporitic sediments and marlstones) overprinted by near-isochemical regional metamorphism. They usually appear as scarce intercalations from millimeter up to meter scale, within the high-grade pelitic rocks, in the lower part of the metamorphic section, although the proportion of metacarbonate rocks can be higher and different marble layers are exploited. We report for the first time the occurrence of a "reaction calcic exoskarn", which corresponds tosuch metacarbonate rocks, taking into account that a skarn can be developed during regional metamorphism and by different metasomatic processes, adjacent to intrusive bodies, along faults and shear zones, and what defines these rocks as a skarn is its mineralogy, which includes a variety of calc-silicate and associated minerals, usually dominated by garnet and pyroxene. Therefore, this paper focus attention to the occurrence of metacarbonate andrelated rocks, which occurs as small scale reactions zones that show a gradational contact from garnet-bearing pelitic rocks to marbles or carbonate-silicate rocks, giving particular interest to the calc-silicate rocks, which are characterized by the presence of elongated grains of banded clinopyroxene (diopside) and scapolite and massiveor scattered garnet. Several reaction-zones occur in the contact between impure calcite marble and garnet-bearing metapelite and the sequence of mineral assemblages in these reaction zones is: biotite + plagioclase K-feldspar garnet (Zone I), biotite + plagioclase K-feldspar garnet staurolite epidote (Zone II),plagioclase + amphibole garnet epidote (Zone III), amphibole + diopside + garnet + plagioclase (Zone IV), plagioclase + diopside scapolite (Zone V), epidote calcite (Zone VI), and calcite dolomite (Zone VII).
publishDate 2008
dc.date.issued.spa.fl_str_mv 2008
dc.date.accessioned.spa.fl_str_mv 2019-06-27T23:09:33Z
dc.date.available.spa.fl_str_mv 2019-06-27T23:09:33Z
dc.type.spa.fl_str_mv Artículo de revista
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url https://repositorio.unal.edu.co/handle/unal/34004
http://bdigital.unal.edu.co/24084/
dc.language.iso.spa.fl_str_mv spa
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dc.relation.spa.fl_str_mv http://revistas.unal.edu.co/index.php/esrj/article/view/21198
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
Earth Sciences Research Journal
dc.relation.ispartofseries.none.fl_str_mv Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 72-106 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 72-106 2339-3459 1794-6190
dc.relation.references.spa.fl_str_mv Ríos, C.A. and Castellanos, O.M and Gómez, S.I. and Ávila, G.A. (2008) Petrogenesis of the metacarbonate and related rocks of the silgará formation, central santander massif, colombian andes: an overview of a “reaction calcic exoscarn”. Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 72-106 Earth Sciences Research Journal; Vol. 12, núm. 1 (2008); 72-106 2339-3459 1794-6190 .
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
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dc.publisher.spa.fl_str_mv UNIVERSIDAD NACIONAL DE COLOMBIA
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