About: Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif)

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About: Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif) Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.chemer.2011.11.002
Description	The Fe-Mn-rich garnetites (coticules) associated with banded iron formations occur in the Neoproterozoic metamorphic complex of the Desná Unit. Their mineral assemblage consists of almandine-spessartine garnet, quartz, magnetite, epidote and sporadically biotite, chlorite, amphibole, plagioclase, calcite, ilmenite and apatite. The mineralogical, petrological and geochemical results demonstrate that the protolith of coticules and associated BIFs was formed during periods of submarine hydrothermal activity in the Late Proterozoic by differential precipitation of Fe and Mn from low-temperature solutions. The Fe-Mn-rich precipitates mixed to a varied degree with the detritic siliciclastic material. Subsequently the protolith underwent polyphase metamorphism reaching the amphibolite facies grade during the pre-Variscan (M1) and Variscan periods. The P-T conditions assumed for the peak Variscan metamorphism (M2) are T ?540-580 °C and P ?600 MPa, the M3 is characterized by an upper pressure limit 400 MPa at a maximum temperature of 600 °C and a metamorphic event M4 related to the hydration reactions which occurred during the late-stage of the Variscan orogenesis is characterized by T ?150-300 °C at P {200 MPa. The Fe-Mn-rich garnetites (coticules) associated with banded iron formations occur in the Neoproterozoic metamorphic complex of the Desná Unit. Their mineral assemblage consists of almandine-spessartine garnet, quartz, magnetite, epidote and sporadically biotite, chlorite, amphibole, plagioclase, calcite, ilmenite and apatite. The mineralogical, petrological and geochemical results demonstrate that the protolith of coticules and associated BIFs was formed during periods of submarine hydrothermal activity in the Late Proterozoic by differential precipitation of Fe and Mn from low-temperature solutions. The Fe-Mn-rich precipitates mixed to a varied degree with the detritic siliciclastic material. Subsequently the protolith underwent polyphase metamorphism reaching the amphibolite facies grade during the pre-Variscan (M1) and Variscan periods. The P-T conditions assumed for the peak Variscan metamorphism (M2) are T ?540-580 °C and P ?600 MPa, the M3 is characterized by an upper pressure limit 400 MPa at a maximum temperature of 600 °C and a metamorphic event M4 related to the hydration reactions which occurred during the late-stage of the Variscan orogenesis is characterized by T ?150-300 °C at P {200 MPa. (en)
Title	Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif) Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif) (en)
skos:prefLabel	Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif) Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif) (en)
skos:notation	RIV/61989592:15310/12:33140401!RIV13-MSM-15310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GP205/07/P130), S
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Zimák, Jiří Kropáč, Kamil
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	157118
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/12:33140401
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Garnetites, Coticules, Banded iron formations, Desná Unit, Silesicum, Variscan metamorphism (en)
http://linked.open.../riv/klicoveSlovo	Desná Unit Garnetites Variscan metamorphism Banded iron formations Coticules Silesicum
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[74CDFE081E01]
http://linked.open...i/riv/nazevZdroje	Chemie der Erde-Geochemistry
http://linked.open...in/vavai/riv/obor	DB
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Neoidic mineralization at the contact of the Bohemian massif and Western Carpathians
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	72
http://linked.open...iv/tvurceVysledku	Zimák, Jiří Buriánek, David Kropáč, Kamil
issn	0009-2819
number of pages	18 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.chemer.2011.11.002
http://localhost/t...ganizacniJednotka	15310
is http://linked.open...avai/riv/vysledek of	Origin and metamorphic evolution of Fe-Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif)

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