Bollettino di Geofisica Teorica e Applicata
OGS Website BGTA homepage
About the Journal
Contacts
To Authors
On-line Submission
Subscriptions
Forthcoming
On-line First
The Historical First Issue
Issues

2019 Vol. 60
1 / 2 / 3 / 4 / Suppl. 1 / Suppl. 2

2018 Vol. 59
1 / 2 / 3 / 4 / Suppl. 1

2017 Vol. 58
1 / 2 / 3 / 4

2016 Vol. 57
1 / 2 / 3 / 4 / Suppl. 1

2015 Vol. 56
1 / 2 / 3 / 4

2014 Vol. 55
1 / 2 / 3 / 4

2013 Vol. 54
1 / 2 / 3 / 4 / Suppl. 1 / Suppl. 2

2012 Vol. 53
1 / 2 / 3 / 4

2011 Vol. 52
1 / 2 / 3 / 4 / Suppl. 1

2010 Vol. 51
1 / 2-3 / 4 / Suppl. 1

2009 Vol. 50
1 / 2 / 3 / 4

2008 Vol. 49
1 / 2 / 3-4 / Suppl. 1

2007 Vol. 48
1 / 2 / 3 / 4

2006 Vol. 47
1-2 / 3 / 4

2005 Vol. 46
1 / 2-3 / 4

2004 Vol. 45
1-2 / 3 / 4 / Suppl. 1 / Suppl. 2

2003 Vol. 44
1 / 2 / 3-4

2002 Vol. 43
1-2 / 3-4

2001 Vol. 42
1-2 / 3-4

2000 Vol. 41
1 / 2 / 3-4

1999 Vol. 40
1 / 2 / 3-4

1998 Vol. 39
1 / 2 / 3 / 4

1997 Vol. 38
1-2 / 3-4

1995 Vol. 37
145 / 146 / 147 / 148 / Suppl. 1

1994 Vol. 36
141-144 / Suppl. 1

1993 Vol. 35
137-138 / 139 / 140

1992 Vol. 34
133 / 134-135 / 136

1991 Vol. 33
129 / 130-131 / 132

 
 

Vol. 50, n.3, September 2009
pp. 227-233

A note on the lithospheric thickness of the Kumaun - Garhwal Himalaya from change in viscosity at the lithosphere-asthenosphere boundary

R.K. SARKAR, D.K. SAHA and R. SINGH

Received: January 30, 2007;accepted: November 16, 2007

Abstract

The Himalaya with a strike length exceeding 2500 km is believed to have resulted from the collision of the Indian plate with the Eurasian plate during the Eocene to Miocene times. Based on the mean surface heat flow density and radioactive heat generation values of 68 mW / m2 and 2.7 μW/ m3 respectively, a part of the Kumaun- Garhwal Himalaya (Lat: 29-31N; Long: 79- 81 E ) is found to have a lithospheric thickness of about 123 km, as estimated by the depth, at which the high surface value of the viscosity dropped to about 1021 poise (1020 kg/m/sec) corresponding to the viscosity-depth curve. The intersection of the mantle melting (solidus) curve with the geotherm of the Kumaun-Garhwal Himalaya at a depth of about 123 km, also provided the lithospheric thickness in respect of the Kumaun-Garhwal Himalaya.

Download PDF complete



back to table of contents