+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Magnetovariational study over a seismically active area in the Deccan Trap province of western India



Magnetovariational study over a seismically active area in the Deccan Trap province of western India



Physics of the Earth and Planetary Interiors 66(1-2): 0-131



This paper presents the results of a magnetovariational study undertaken over a basalt-covered region of western India which has been experiencing a swarm of seismic activity since early 1986. The most striking feature of the transient variations is the anomalous enhancement of the east-west (Y) component at stations bounding the seismically active belt. From the nature of the horizontal transfer functions and the anomalous induction arrows, it is inferred that this behaviour is related to the presence of a resistive body embedded in a north-south-oriented conductive belt. Consistent with an evolutionary model of Deccan volcanism and other geophysical data, it is suggested that the central resistive block coincident with the concentrated belt of earthquake epicentres represents either a dormant volcanic plug or a plutonic body rooted in upwarped conducting mantle. To account for the phase relationship between the anomalous Y variations and the normal north-south (X) variations, it is proposed that the upwarped asthenosphere, with its associated high geothermal anomaly, acts as a conducting path to channel induced current from the region of the Cambay triple junction located towards the northwest of the array. The existence of the strong induced currents in the region of the triple junction conforms with the induction arrow pattern observed at the array stations.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 019361283

Download citation: RISBibTeXText

DOI: 10.1016/0031-9201(91)90108-t


Related references

Geochemical behaviour of the lava flows from western Deccan Trap Province of the area around Manmad, District Nasik (MS) India. International Geological Congres, Abstracts--Congres Geologique International, Resumes 30, Vol, 1996

Geothermal system in Deccan Trap Province, western Maharastra, India. Gondwana Geological Magazine: Pages 106-116. 1993., 1993

Geology and chemical stratigraphy of the Deccan basalts of Chikaldara and Behramghat sections from the eastern part of the Deccan Trap Province, India. Gondwana Geological Magazine Spl, 1996

Petrology and geochemistry of the Deccan basalt flows intersected in Salbardi drill hole, eastern Deccan Trap province, India. Gondwana Geological Magazine Spl, 1996

Study of the piezomagnetic effect in a seismically active area; example of the area of Arette (western part of French Pyrenees). Earthquake Prediction Research 3(2): 161-177, 1985

The tectonic framework and structural evolution of parts of Deccan Trap province of Maharashtra, India; a study based on remote sensing techniques. Pages 20-33 1982, 1982

Weathering of Deccan Trap basalts in western India. Clay Research 8(1 & 2): 67-83, 1989

Regional dyke swarms related to the Deccan Trap alkaline province, India. Abstracts - Geological Society of Australia 28: (1 p, 1990

Hydrogeochemistry of groundwaters from Behedi Basin, Deccan Trap hydrologic province, India. Pages 131-150 2000, 2000

Study of the seismo-magnetic field in the seismically active area of Arette (western part of French Pyrenees). Eos, Transactions, American Geophysical Union 63(51): 1260, 1982

Mineralogy and geochemistry of the Mahi River sediments in tectonically active western India Implications for Deccan large igneous province source, weathering and mobility of elements in a semi-arid climate. Geochimica et Cosmochimica Acta 104: 63-83, 2013

The Western Ghats and the associated tectonism in Deccan Trap area. Special Publication Series - Geological Survey of India 64(Pages 585-597, 2001

Springs in a headwater basin in the Deccan Trap country of the Western Ghats, India. Hydrogeology Journal: , Pages 553-565. 2002., 2002

Microtextures of laterites and bauxites capping Deccan Trap basalts in western India. Scanning Electron Microscopy 1986(2): 415-423, 1986

Lithospheric electrical imaging of the Deccan trap covered region of western India. Journal of Geophysical Research 114.B1, 2009