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Nathula Fault

 

deformed cross-bedding

Roberto Weinberg, Monash University, Australia
and Malay Mukul, Indian Institute of Technology Bombay

 

 

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This site brings together photographs documenting the brittle faults on the road between Gangtok and Nathula Pass in Sikkim.

 

 

fault
Fig. 1a) Nearly 2m thick fault rock and orthogneiss in hanging wall.
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Fig. 1b) Same fault. 		fault
Fig. 1c) Same fault.
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Fig. 1d) Same fault showing curved foliation on the handing wall. 		fault
Fig. 1e) Brittle faults associated with dragging in gneiss suggesting brittle overprint of ductile shearing
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Fig. 1f) fault gouge in two bands 		fault
Fig. 1g) Brittle faulting.
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Fig. 1h) Fault gouge only 2cm thick. 		fault
Fig. 1i) A cataclasite layer 1 cm thick.
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Fig. 1j) Fault gouge only 2cm thick. 		fault
Fig. 1k) A cataclasite layer 1 cm thick.
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Fig. 1l) Fault rock above the gneiss. This is the footwall, matching the hanging wall in Fig. 1a and b. 		fault
Fig. 1m)
Fault
Fig. 1n) Fault rock, comprising a breccia, cataclastic layers and fault gouge. Altogether more than 3m thick below an orthogneiss.

Fault at Kyongnosla

Fault
Fig. 2a) Fault at Kyongnosla.
Fault
Fig. 2b) Fault rock, weathered. 		Fault
Fig. 2c) Fault rock, weathered.