Une typologie originale du zircon accessoire

Pupin, Jean-Pierre; Turco, Guy

doi:10.3406/bulmi.1972.6688

Cited by 53 publications

(15 citation statements)

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“…The oldest analysed zircon reveals almost concordant age at 2,081 ± 18 Ma (1r). This is a slightly rounded, normal-prismatic, colourless, transparent zircon which can be defined as S12 subtype in classification Pupin and Turco (1972 Well Marcinki IG-1…”

Section: Detrital Zircon Geochronologymentioning

confidence: 99%

Uplift and late orogenic deformation of the Central European Variscan belt as revealed by sediment provenance and structural record in the Carboniferous foreland basin of western Poland

Mazur

Aleksandrowski

Turniak

et al. 2008

Int J Earth Sci (Geol Rundsch)

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The Carboniferous foreland basin of western Poland contains a coherent succession of late Viséan through Westphalian turbidites derived from a uniform group of sources located within a continental magmatic arc. Detrital zircon geochronology indicates that two main crustal components were present in the source area of Namurian A sediments. They represent Late Devonian and Early Carboniferous ages, respectively. The detritus from Westphalian D beds is much more diversified and contains admixture of Late Carboniferous zircons suggesting rapid unroofing of Variscan igneous intrusions in the hinterland between Namurian A and Westphalian D times. Tectonic repetitions of tens of metres thick fault-bounded stratigraphic intervals, recorded in several wells, provide evidence for compressional regime that occurred in the SW part of the Carboniferous basin not earlier than during the Westphalian C and produced NW-SE trending folds, concordant with the structural grain of the adjacent, NE part of the Bohemian Massif.

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Section: Detrital Zircon Geochronologymentioning

confidence: 99%

Uplift and late orogenic deformation of the Central European Variscan belt as revealed by sediment provenance and structural record in the Carboniferous foreland basin of western Poland

Mazur

Aleksandrowski

Turniak

et al. 2008

Int J Earth Sci (Geol Rundsch)

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“…Development of {211} faces is a widespread feature of zircon grains containing inheritance, but several factors may determine that morphology. Pupin and Turco (1972) attributed differential development of zircon prism faces to differences in crystallisation temperature. Pupin (1980) later suggested that the development of zircon pyramids is determined by the alkalinity of the magma, {211} pyramids becoming larger and {011} pyramids smaller as magmas become less alkaline and more aluminous.…”

Section: Metamorphic Zircon Growthmentioning

confidence: 99%

Response of detrital zircon and monazite, and their U–Pb isotopic systems, to regional metamorphism and host‐rock partial melting, Cooma Complex, southeastern Australia

Williams

2001

Australian Journal of Earth Sciences

314

170

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Progressive Early Silurian low-pressure greenschist to granulite facies regional metamorphism of Ordovician flysch at Cooma, southeastern Australia, had different effects on detrital zircon and monazite and their U-Pb isotopic systems. Monazite began to dissolve at lower amphibolite facies, virtually disappearing by upper amphibolite facies, above which it began to regrow, becoming most coarsely grained in migmatite leucosome and the anatectic Cooma Granodiorite. Detrital monazite U-Pb ages survived through mid-amphibolite facies, but not to higher grade. Monazite in the migmatite and granodiorite records only metamorphism and granite genesis at 432.8 Ϯ 3.5 Ma. Detrital zircon was unaffected by metamorphism until the inception of partial melting, when platelets of new zircon precipitated in preferred orientations on the surface of the grains. These amalgamated to wholly enclose the grains in new growth, characterised by the development of {211} crystal faces, in the migmatite and granodiorite. New growth, although maximum in the leucosome, was best dated in the granodiorite at 435.2 Ϯ 6.3 Ma. The combined best estimate for the age of metamorphism and granite genesis is 433.4 Ϯ 3.1 Ma. Detrital zircon U-Pb ages were preserved unmodified throughout metamorphism and magma genesis and indicate derivation of the Cooma Granodiorite from Lower Palaeozoic source rocks with the same protolith as the Ordovician sediments, not Precambrian basement. Cooling of the metamorphic complex was relatively slow (average ~12°C/10 6 y from ~730 tõ 170°C), more consistent with the unroofing of a regional thermal high than cooling of an igneous intrusion. The ages of detrital zircon and monazite from the Ordovician flysch (dominantly composite populations 600-500 Ma and 1.2-0.9 Ga old) indicate its derivation from a source remote from the Australian craton.

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“…The typomorphic implications of zircon crystal morphology are determined by the relationship between the faceting of individual grains and their crystallization conditions (Pupin and Turco, 1972;Brodskaya et al, 1986). The morphological parame ters of the zircons studied and plotted on Pupin's dia gram (Fig.…”

Section: Geochronology Isotope Geochemistry and Crystal Morphology mentioning

confidence: 99%

Origin of carbonatites of eastern taimyr deduced from an isotopic and geochemical study of zircons

Proskurnin¹,

Петров²,

Bagdasarov³

et al. 2010

Geol. Ore Deposits

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Une typologie originale du zircon accessoire

Cited by 53 publications

References 0 publications

Uplift and late orogenic deformation of the Central European Variscan belt as revealed by sediment provenance and structural record in the Carboniferous foreland basin of western Poland

Uplift and late orogenic deformation of the Central European Variscan belt as revealed by sediment provenance and structural record in the Carboniferous foreland basin of western Poland

Response of detrital zircon and monazite, and their U–Pb isotopic systems, to regional metamorphism and host‐rock partial melting, Cooma Complex, southeastern Australia

Origin of carbonatites of eastern taimyr deduced from an isotopic and geochemical study of zircons

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