Contact metamorphic granophyres of partial melting origin adjacent to dolerite dykes in Karnataka

Saved in:
Authors:Ramakrishnan, M.; Bhattacharyya, Samit
Author Affiliations:Primary:
Geol. Surv. India, Ahmedabad, India
Volume Title:Journal of the Geological Society of India
Source:Journal of the Geological Society of India, 26(2), p.95-102. Publisher: Geological Society of India, Bangalore, India. ISSN: 0016-7622
Publication Date:1985
Note:In English. 31 refs.; illus. incl. 1 table, 1 plate, geol. sketch map
Summary:The contact of post-Dharwar dolerite dykes with gneisses and granites of the Peninsular Gneiss complex has produced granophyric rocks conspicuous at the weathered dyke margins near Hole Narsipur, S India. The degree of development of granophyric texture varies, increasing when the host rock changes from granodiorite to alkali granite. Since no addition of K2O from the dolerite is likely, the granophyric rocks are attributed to partial melting of tonalite, trondhjemite or granodiorite to produce more potassic material. [R.A.H.]
Subjects:Alkalic composition; Contact metamorphism; Dikes; Gneisses; Granites; Granophyre; Igneous rocks; Intrusions; Metamorphic rocks; Metamorphism; Partial melting; Petrology; Plutonic rocks; Processes; Textures; Asia; Bangalore India; India; Indian Peninsula; Karnataka India; Hole Narsipur; Peninsular Gneissic Complex; Post Dharwar; Southern India
Abstract Numbers:85M/3519
Record ID:1985063226
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Tags: Add Tag
No Tags, Be the first to tag this record!
Be the first to leave a comment!
You must be logged in first