Gangdese batholith | |
|---|---|
 Tectonic units of the Himalaya. Green is the Indus-Yarlung suture zone. Red is the Transhimalaya, including the Gangdese batholith. Lhasa to the east. | |
| Coordinates: 30°N 91°E / 30°N 91°E | |
| Location | Tibet Autonomous Region, China |
The Gangdese batholith or Gangdese volcanic arc is a major geological structure in the south of the Lhasa terrane in Tibet, to the north of the Himalayas. The batholith formed around 100 million years ago, and was volcanically active for about 20 million years. It reactivated around 65 million years ago as the Indian plate approached Eurasia, and was active for another 20 million years.