Stable isotope and chemical compositions of carbonate ocelli and veins in Mesozoic lamprophyres of Hungary

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Abstract

Lamprophyres and carbonatites of late Cretaceous age occurring in Palaeozoic to Mesozoic granites and sedimentary rocks contain carbonate ocelli and veins which show alteration resulting in the formation of disseminated carbonate and clay minerals. Those bodies intruding granites contain calcite and dolomite whose carbon isotopic compositions (δ13C ≃ -4.5‰) are within the primary mantle ranges, whereas the oxygen isotopic compositions (δ18O ≃ 14‰) are well outside the ranges of primary carbonatites. Carbonate ocelli of the lamprophyres were formed by interactions of igneous fluids with xenoliths of sedimentary origin. Interactions with the magma have also changed the chemical composition of limestone xenoliths enclosed in the lamprophyres. -from Authors

Original languageEnglish
Pages (from-to)679-690
Number of pages12
JournalEuropean Journal of Mineralogy
Volume6
Issue number5
Publication statusPublished - 1994

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Carbonates
Isotopes
stable isotope
Calcium Carbonate
chemical composition
carbonate
isotopic composition
Chemical analysis
Carbonate minerals
Sedimentary rocks
Clay minerals
clay mineral
dolomite
sedimentary rock
Carbon
calcite
Paleozoic
magma
limestone
Oxygen

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

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title = "Stable isotope and chemical compositions of carbonate ocelli and veins in Mesozoic lamprophyres of Hungary",
abstract = "Lamprophyres and carbonatites of late Cretaceous age occurring in Palaeozoic to Mesozoic granites and sedimentary rocks contain carbonate ocelli and veins which show alteration resulting in the formation of disseminated carbonate and clay minerals. Those bodies intruding granites contain calcite and dolomite whose carbon isotopic compositions (δ13C ≃ -4.5‰) are within the primary mantle ranges, whereas the oxygen isotopic compositions (δ18O ≃ 14‰) are well outside the ranges of primary carbonatites. Carbonate ocelli of the lamprophyres were formed by interactions of igneous fluids with xenoliths of sedimentary origin. Interactions with the magma have also changed the chemical composition of limestone xenoliths enclosed in the lamprophyres. -from Authors",
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journal = "European Journal of Mineralogy",
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T1 - Stable isotope and chemical compositions of carbonate ocelli and veins in Mesozoic lamprophyres of Hungary

AU - Demény, A.

AU - Fórizs, I.

AU - Molnar, F.

PY - 1994

Y1 - 1994

N2 - Lamprophyres and carbonatites of late Cretaceous age occurring in Palaeozoic to Mesozoic granites and sedimentary rocks contain carbonate ocelli and veins which show alteration resulting in the formation of disseminated carbonate and clay minerals. Those bodies intruding granites contain calcite and dolomite whose carbon isotopic compositions (δ13C ≃ -4.5‰) are within the primary mantle ranges, whereas the oxygen isotopic compositions (δ18O ≃ 14‰) are well outside the ranges of primary carbonatites. Carbonate ocelli of the lamprophyres were formed by interactions of igneous fluids with xenoliths of sedimentary origin. Interactions with the magma have also changed the chemical composition of limestone xenoliths enclosed in the lamprophyres. -from Authors

AB - Lamprophyres and carbonatites of late Cretaceous age occurring in Palaeozoic to Mesozoic granites and sedimentary rocks contain carbonate ocelli and veins which show alteration resulting in the formation of disseminated carbonate and clay minerals. Those bodies intruding granites contain calcite and dolomite whose carbon isotopic compositions (δ13C ≃ -4.5‰) are within the primary mantle ranges, whereas the oxygen isotopic compositions (δ18O ≃ 14‰) are well outside the ranges of primary carbonatites. Carbonate ocelli of the lamprophyres were formed by interactions of igneous fluids with xenoliths of sedimentary origin. Interactions with the magma have also changed the chemical composition of limestone xenoliths enclosed in the lamprophyres. -from Authors

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