• First recognized by Heim and Gansser (1939) based on observations made along Garhwal and Kumaun regions of India.
• Crops out
along 2200 km length of the Himalaya from western Zanskar to Bhutan and
Arunachal Pradesh
• Intracrustal
thrust that dips northward
Variable Definations:
•
Heim and
Gansser (1939); it marks the lithological difference between the Lesser
Himalayan rocks (below) and the Higher Himalayan rocks (above)
•
Le Fort
1975; it denotes an abrupt change in metamorphic grade
•
Arita
1983; Searle et al. 2003, 2008 : the fault defines the top or basal surface of
several kilometer-thick shear zone across the lowermost part of the Higher
Himalayan rocks and the uppermost part of the Lesser Himalayan sequence
•
Bordet
(1961) was the first to map the Main Central Thrust in the Arun Valley of east
Nepal, where he placed the thrust along a prominent kyanite-bearing zone within
the sillimanite gneisses.
Southward Extension of the MCT
MCT extends to the south over the Lesser Himalaya as Nappe and Klippe
•
At Ktm:
Mahabharat Thrust
•
West
Nepal: Dadheldhura Thrust
•
Jajarkot:
Jajarkot Thrust (extension of Lower MCT)
•
Kumaun:
Almora thrust, Chamba Thrust
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