Skip to Main Content
Book Chapter

Dyke emplacement in the Narmada rift zone and implications for the evolution of the Deccan Traps

By
Wei Ju
Wei Ju
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education; School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education; School of Earth and Space Science, Peking University, Beijing 100871, China
Search for other works by this author on:
Guiting Hou
Guiting Hou
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education; School of Earth and Space Science, Peking University, Beijing 100871, China
Search for other works by this author on:
K. R. Hari
K. R. Hari
School of Studies in Geology and Water Resource Management, Pt. Ravishankar Shukla University, Raipur 492010, India
Search for other works by this author on:
Published:
January 01, 2017

Abstract

The Deccan Large Igneous Province of India is the product of fissure eruptions, and contains vast lava fields and dyke–sill networks. It is associated with several rift zones in peninsular India, which reflect pre-existing major weaknesses in the Indian lithosphere. In rift-zone eruptions, magma is normally transported to the surface through dykes. However, some injected dykes do not reach the surface but are arrested at depth in the rift zone due to mechanical heterogeneity and anisotropy, or insufficient magma pressure. In the present work, the effects of mechanical layering and regional tension on dyke emplacement in the Narmada rift zone are studied. The results indicate that the distribution of maximum principal tensile stresses was altered by mechanical layering and/or regional tension, which has led to variations in potential dyke propagation pathways. Studies on dyke evolution and emplacement in the Narmada rift zone indicate four evolutionary stages: stage I – arrival of a mantle plume and pre-volcanic extension; stage II – formation of shallow magma chambers; stage III – vertical dyke injection and fissure eruption; and stage IV – the ‘blanket effect’ and lateral dyke propagation.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Tectonics of the Deccan Large Igneous Province

S. Mukherjee
S. Mukherjee
Department of Earth Sciences, Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
Search for other works by this author on:
A. A. Misra
A. A. Misra
Exploration, Reliance Industries Ltd, Mumbai 400 701, Maharashtra, India
Search for other works by this author on:
G. Calvès
G. Calvès
Université Toulouse 3, Paul Sabatier, Géosciences Environnement Toulouse, 14 avenue Edouard Belin, 31400, Toulouse, France
Search for other works by this author on:
M. Nemčok
M. Nemčok
EGI at University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, UT 84108, USAEGI Laboratory at SAV, Dúbravskácesta 9, 840 05 Bratislava, Slovakia
Search for other works by this author on:
Geological Society of London
Volume
445
ISBN electronic:
9781786203281
Publication date:
January 01, 2017

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal