New Uranium-lead (U-Pb) Zircon Geochronology of Sholayar Alkaline Syenite Complex, Kerala
- Autor(en)
- Moumita Chowdhury, Jyotisankar Ray, J. K. Tomson, Debaleena Sarkar, Suresh C. Patel, Rajeev Kumar, Pratik Mukherjee, Soumili Sahoo, Christian Koeberl
- Abstrakt
U-Pb age data from the leuco-syenite from the Sholayar Alkaline Syenite Complex (SASC) (10°17’59.9"N: 076°47’26.3"E) is presented in this study. The present sample contains alkali feldspar (orthoclase), oligoclasic plagioclase, diopsidic pyroxene, biotite and opaque minerals (magnetite and ilmenite). The modal data of constituent minerals is plotted over the IUGS classification diagram and the data plots fall within the syenite field. Obtained age (mean age 706.7 ± 8.4 Ma) largely corresponds to the Cryogenian period. In chondrite-normalized diagrams, the syenite shows some affinity towards well-studied silica over-saturated syenites of the Southern Granulite Terrane (SGT). The Ti-in zircon thermometry indicates the crystallization temperature in the range of 613° to 755°C. The reported zircon U-Pb age suggests evidence for Cryogenian alkaline magmatism in the SGT associated either with asthenospheric upwelling in an extensional setting or subduction related continental rifting.
- Organisation(en)
- Department für Lithosphärenforschung
- Externe Organisation(en)
- University of Calcutta, Amity University Punjab, National Centre for Earth Science Studies, Indian Institute of Technology Bombay, Geological Survey of India
- Journal
- JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
- Band
- 100
- Seiten
- 1311-1319
- Anzahl der Seiten
- 9
- ISSN
- 0016-7622
- DOI
- https://doi.org/10.17491/jgsi/2024/173984
- Publikationsdatum
- 09-2024
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105105 Geochemie
- Schlagwörter
- ASJC Scopus Sachgebiete
- Geology
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/3a3e53ab-f384-4f5f-8289-dc3bea8a19f7