2011 Summer Geologic Field Work, Greater Himalayan Range, India

During August, Jeff Lee and undergraduate student Jon Stordahl traveled to India to undertake field research along the Zanskar normal fault and on ductilely deformed, middle crustal rocks exposed in its footwall. The research area is located in the Greater Himalayan Range, Ladakh Province.

Fieldwork centered on collecting mesoscopic structural and kinematic data from middle crustal rocks, and to document the relative timing of deformation recorded in these rocks and intrusive events. Approximately 250 kg of rocks were collected for detailed microstructural kinematic and deformation temperature analyses, U/Pb geochronology, and Ar/Ar and (U-Th)/He thermochronometry studies.

The goals of this project are to document the deformational patterns recorded in these middle crustal rocks to test whether these rocks record evidence for mid-crustal channel flow, and the timing of deformation ductile deformation. In addition, our (U-Th)/He thermochronometry studies will focus on documenting the young exhumation and slip history along the Zanskar normal fault, which is unknown.

View to the west of the central Greater Himalayan Range.
View to the west of the central Greater Himalayan Range.

View to south towards the head of Raruphu Valley, Greater Himalayan Range.
View to south towards the head of Raruphu Valley, Greater Himalayan Range.

Jon riding a horse in the field.
Jon riding a horse in the field.

Jon on the Zanskar fault scarp.
Jon on the Zanskar fault scarp.

Jon deep within the Raruphu Valley, Greater Himalayan Range.
Jon deep within the Raruphu Valley, Greater Himalayan Range.

Monk showing fine form catching a frisbee.
Monk showing fine form catching a frisbee.

Glaciated exposure Raruphu Valley, Greater Himalayan Range.
Glaciated exposure Raruphu Valley, Greater Himalayan Range.

View to the southeast of the Zanskar normal fault.
View to the southeast of the Zanskar normal fault.