Mineral–fluid interactions in the late Archean Closepet granite batholith, Dharwar Craton, southern India - Université Clermont Auvergne Accéder directement au contenu
Chapitre D'ouvrage Année : 2019

Mineral–fluid interactions in the late Archean Closepet granite batholith, Dharwar Craton, southern India

E. Słaby
  • Fonction : Auteur
K. Gros
  • Fonction : Auteur
H.-J. Förster
  • Fonction : Auteur
A. Wudarska
  • Fonction : Auteur
Ł. Birski
  • Fonction : Auteur
J. Götze
  • Fonction : Auteur
H. Martin
Jean-François Moyen
I. Moszumańska
  • Fonction : Auteur

Résumé

The chemical composition of different rocks as well as volatile-bearing and volatile-free minerals has been used to assess the presence of fluids in the Closepet batholith and to estimate the intensity of the fluid−rock interactions. The data were processed using polytopic vector analysis (PVA). Additional data include measurements of water content in the structure of volatile-free minerals and an examination of growth textures. The composition of mineral domains indicated formation/transformation processes with common fluid−mineral interactions. In general, the results suggested that the processes occurred in a ternary system. Two end-members were likely magmas and the third was enriched in fluids. In contrast, analysis of the apatite domains indicated that they likely formed/transformed in a more complex, four-component system. This system was fluid-rich and included hybrid magma with a large mafic component. PVA implies that the fluids do not appear to come from one source, given their close affinity and partial association with mantle-derived fluids. A dynamic tectonic setting promoting heat influx and redistribution, and interaction of fluids suggests that the formation/ transformation processes of minerals and rocks occurred in a hot-spot like environment.

Domaines

Géochimie
Fichier non déposé

Dates et versions

hal-02043714 , version 1 (21-02-2019)

Identifiants

  • HAL Id : hal-02043714 , version 1

Citer

E. Słaby, K. Gros, H.-J. Förster, A. Wudarska, Ł. Birski, et al.. Mineral–fluid interactions in the late Archean Closepet granite batholith, Dharwar Craton, southern India. Archean Granitoids of India: Windows into Early Earth Tectonics, pp.SP489-2019-287, 2019. ⟨hal-02043714⟩
90 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More