Compositional variation in pyrochlores of Amba Dongar carbonatite complex, Gujarat

Link:
Autor/in:
Erscheinungsjahr:
2010
Medientyp:
Text
Schlagworte:
  • Carbonatite
  • Rare earth element
  • Carbonatite complex
  • Zircon
  • Uranium-Lead Dating
  • Geochronology
  • Carbonatite
  • Rare earth element
  • Carbonatite complex
  • Zircon
  • Uranium-Lead Dating
  • Geochronology
  • Pyrochlore
  • Amba Dongar
  • Gujarat
  • Sovite
  • Zoning
Beschreibung:
  • Pyrochlore is interpreted as a primary magmatic mineral that appeared in early carbonatite phases at Amba Dongar. Later intrusive phases incorporated this early pyrochlore and caused compositional modification, particularly around the rims, in response to changing magma chemistry. Consequently pyrochlore compositions show wide ranges in Nb, Ta, Ca, Ba, Ti and Ce. The final carbonatite phase was ankeritic and rich in hydrothermal fluids, giving rise to extreme compositional zoning and introduction of diverse elements (Si, U, Sr, Th, Fe), in the contained pyrochlore. Enrichment in radioelements such as U lead to metamictization, alteration and A-site vacancy. © GEOL. SOC. INDIA.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/160aac55-25db-43ec-b352-7c4fdf668f48