Along the paleo-Tethys tectonic belt, the extention of the Himalayan geothermal belt, it would be interesting to investigate the origin of the high-T geothermal systems through comparison due to tectonic similarity.
Fliud geochemistry is very useful, especially gas geochemistry.
There are quite some new studies/papers to compare.
e.g.
[1] Li Yiman, Pang Zhonghe*, Yang Fengtian, Yuan Lijuan, Tang Pinghui. Hydrogeochemical characteristics and genesis of the high-temperature geothermal system in the Tashkorgan basin of the Pamir syntax, western China. Journal of Asian Earth Sciences 2017 149: 134-144
[2] Tian Jiao, Pang Zhonghe*, Guo Qi, Wang Yingchun, Li Jie, Huang Tianming, Kong Yanlong. Geochemistry of geothermal fluids with implications on the sources of water and heat recharge to the Rekeng high-temperature geothermal system in the Eastern Himalayan Syntax. Geothermics 2018 74: 92-105