Grenvillian thermal event and remnant charnockite: Isotopic evidence from the Chilka Lake granulite-migmatite suite in the Eastern Ghats belt, India | Zendy

S. Bhattacharya | Zendy; M. P. Deomurari | Zendy; Wilson Teixeira | Zendy

Open Access

Grenvillian thermal event and remnant charnockite: Isotopic evidence from the Chilka Lake granulite-migmatite suite in the Eastern Ghats belt, India

Author(s) -

S. Bhattacharya,

M. P. Deomurari,

Wilson Teixeira

Publication year - 2002

Publication title -

journal of earth system science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.444

H-Index - 52

eISSN - 0973-774X

pISSN - 0253-4126

DOI - 10.1007/bf02702052

Subject(s) - charnockite , granulite , migmatite , gneiss , geochemistry , geology , partial melting , zircon , biotite , metamorphic rock , petrology , geomorphology , mantle (geology) , structural basin , facies , quartz , paleontology

Spectacular exposures of granulite-migmatite occur in the Chilka Lake area of the Eastern Ghats belt. The garnetiferous granite gneiss of peraluminous granitic composition, often contains restitic metapelite inclusions and is demonstrably a product of biotite-dehydration melting in pelitic rocks. On the other hand, older layers and bands of charnockitic rocks frequently occur as dismembered patches within the peraluminous granite, thus imparting a measled appearance of the granite exposures. The partial melting and emplacement of the peraluminous granite represent the Grenvillian thermal event, as evidenced by Rb-Sr whole rock and Pb-Pb zircon dating. On the other hand, minor patches of charnockite represent migmatized relict, as evidenced by some older zircons, in addition to those of Grenvillian age.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research