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Geological Society, London, Special Publications; 2000; v. 170; p. 431-453;
DOI: 10.1144/GSL.SP.2000.170.01.23
© 2000 Geological Society of London

Metamorphic evolution, 40Ar-39Ar chronology and tectonic model for the Neelum valley, Azad Kashmir, NE Pakistan

D. Fontan1, M. Schouppe2, C. J. Hunziker3, G. Martinotti4 & J. Verkaeren5

1 S.E.A. Environmental Service Consulting S.a.s., via Santa Chiara, 52, 10122 Torino, Italy geology{at}seaconsult.it
2 EC Commission D.G. XII, Rue de la Loi, 200, 1049 Bruxelles, Belgium
3 Institut de Minéralogie et Pétrographie BFSH 2, 1015 Lausanne, Switzerland
4 Dipartimento di Scienza della Terra, Via Valperga Caluso, 37, 10125 Torino, Italy
5 Unitè de Géologie, Université catholique de Louvain-la-Neuve, 1348 Louvain-la-Neuve, Belgium

This paper describes the geology, tectonometamorphic history and geochronology of part of the northern flank of the Neelum valley in Azad Kashmir, NE Pakistan. Metamorphic crystalline rocks in this area belong to the Lesser and Higher Himalayan Crystalline complexes. Geological mapping of about 1500 km2 confirms the presence of three main tectonic units characterized by similar lithostratigraphic sequences but with different tectonometamorphic histories. Whether these tectonic units belong to the Lesser or Higher Himalayan Crystallines depends on the, still controversial, position of the Main Central Thrust. A tectonic model, involving syn-convergent exhumation, is suggested that is consistent with new petrographic and geochronological data, and with a revised interpretation of the Main Central Thrust.