Mechanics of mafic dyke swarms in the Deccan Large Igneous Province:   Palaeostress field modelling

doi:10.1016/j.jog.2013.02.002

CORC > 北京大学 > 地球与空间科学学院

	Mechanics of mafic dyke swarms in the Deccan Large Igneous Province: Palaeostress field modelling
	Ju, Wei ; Hou, Guiting ; Hari, K. R.
刊名	journal of geodynamics
	2013
关键词	Mafic dyke swarms Deccan LIP Rifting Palaeostress field Modelling CRETACEOUS-TERTIARY BOUNDARY NORTH CHINA CRATON GIANT DIKE SWARMS FLOOD BASALTS ELASTIC THICKNESS INDIAN SHIELD CONTINENTAL LITHOSPHERE CRUSTAL EXTENSION AR-40-AR-39 AGES TECTONIC STRESS
DOI	10.1016/j.jog.2013.02.002
英文摘要	A numerical model - "rifts - plume or hot spot - drift model" - is proposed for the first time in this paper for the generation of the three regional-scale dyke swarms (the Narmada-Tapi dyke swarm, the Nasik-Pune dyke swarm and the West Coast dyke swarm) within the Deccan Large Igneous Province (LIP) on the basis of the geological evolution of Deccan LIP and the orientations of dyke swarms. The dyke swarms have been modelled with finite element method (FEM) in three stages (stages I-III) considering that there was about 20 degrees counterclockwise rotation of the Indian subcontinent since 65 Ma. During stage I, the orientation of the horizontal maximum principal compressive stress (sigma(1)) is similar to ENE-WSW, generating the ENE-WSW-trending Narmada-Tapi dyke swarm. In stage II, the sigma(1) orientations are weakly preferred in NW-SE and E-W which are in agreement with the orientations of Nasik-Pune dyke swarm. In stage III, the sigma(1) orientation is similar to N-S generating the nearly N-S-trending West Coast dyke swarm. The rifts, plume or hot spot and the northward counterclockwise motion of Indian subcontinent altogether contributed to the generation of Deccan LIP and its associated dyke swarms. (C) 2013 Elsevier Ltd. All rights reserved.; Geochemistry & Geophysics; SCI(E); 4; ARTICLE; 79-91; 66
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155637]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Ju, Wei,Hou, Guiting,Hari, K. R.. Mechanics of mafic dyke swarms in the Deccan Large Igneous Province: Palaeostress field modelling[J]. journal of geodynamics,2013.
APA	Ju, Wei,Hou, Guiting,&Hari, K. R..(2013).Mechanics of mafic dyke swarms in the Deccan Large Igneous Province: Palaeostress field modelling.journal of geodynamics.
MLA	Ju, Wei,et al."Mechanics of mafic dyke swarms in the Deccan Large Igneous Province: Palaeostress field modelling".journal of geodynamics (2013).