An early Pliocene thermal disturbance of the Main Central Thrust, central Nepal

implications for Himalayan tectonics

P. Copeland, T. M. Harrison, Kip Hodges, P. Maruejol, P. Le Fort, A. Pecher

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Since the beginning of the collision between India and Asia at about 50 Ma, the convergence in the Himalaya has largely been taken up along major thrust zones. In this study, samples of the Lesser Himalaya Formations, up to 10 km below the Main Central Thrust (MCT) and the Greater Himalaya Sequence, up to 12 km above the MCT, have been analyzed by the 40Ar/39Ar and U-Pb methods to investigate the thermal history of the MCT. Infiltration of hot fluids through the MCT zone appears to be the best hypothesis to explain the data. Simple numerical simulations, which account for heat transfer by advection within the fluid flow zone and by conduction outside it, indicate that the observed age distribution could have been produced by infiltration of hot fluids through the MCT zone at circa 5 to 4 Ma. -from Authors

Original languageEnglish (US)
Pages (from-to)8475-8500
Number of pages26
JournalJournal of Geophysical Research
Volume96
Issue numberB5
StatePublished - 1991
Externally publishedYes

Fingerprint

Nepal
Tectonics
Infiltration
thrust
tectonics
Pliocene
disturbances
disturbance
Fluids
Advection
Flow of fluids
infiltration
Heat transfer
Computer simulation
fluid
fluids
advection
India
age structure
fluid flow

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

An early Pliocene thermal disturbance of the Main Central Thrust, central Nepal : implications for Himalayan tectonics. / Copeland, P.; Harrison, T. M.; Hodges, Kip; Maruejol, P.; Le Fort, P.; Pecher, A.

In: Journal of Geophysical Research, Vol. 96, No. B5, 1991, p. 8475-8500.

Research output: Contribution to journalArticle

Copeland, P, Harrison, TM, Hodges, K, Maruejol, P, Le Fort, P & Pecher, A 1991, 'An early Pliocene thermal disturbance of the Main Central Thrust, central Nepal: implications for Himalayan tectonics', Journal of Geophysical Research, vol. 96, no. B5, pp. 8475-8500.
Copeland, P. ; Harrison, T. M. ; Hodges, Kip ; Maruejol, P. ; Le Fort, P. ; Pecher, A. / An early Pliocene thermal disturbance of the Main Central Thrust, central Nepal : implications for Himalayan tectonics. In: Journal of Geophysical Research. 1991 ; Vol. 96, No. B5. pp. 8475-8500.
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