Geoscientists Uncover New Structural Evidence on How the Tibetan Plateau Formed

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A new study in Nature Geoscience by researchers from the UK and China provides direct structural evidence explaining how the Tibetan Plateau was formed.

The Tibetan Plateau is also known as the Qinghai-Tibet Plateau, the Tibetan Highlands, or the Roof of the World. It stands as Earth's highest and largest upland area, influencing global weather and climate systems.

Geographically, the plateau is located in southwestern China. It covers the Tibet Autonomous Region, most of Qinghai province, western Sichuan, and southern Xinjiang.
The Kunlun Mountains mark its northern boundary. To the south and southwest lie the Himalayas and the Karakoram Range, while the Daxue and Hengduan ranges border its eastern side.

Around 50 million years ago, the northward-moving Indian Plate collided with the Eurasian Plate, closing the Tethys Ocean and deforming the continental crust.
The Indian Plate was pushed deep beneath the Eurasian Plate. This subduction process thickened the continental crust and pushed the Tibetan region upward.
Between 45 and 20 million years ago, the uplift occurred unevenly across the plateau. Western Tibet experienced earlier subduction and land elevation compared to central areas.

The plateau spans roughly 5 million sq km with an average elevation above 4,500 metres, making it the largest high-altitude region on Earth.
Its southern edge features the Himalayas, including Mount Everest, the world's highest peak along the Nepal-China border.
The northern Qiangtang region is a cold, high-altitude desert containing numerous saline and brackish lakes.
The ecosystem varies across regions. High grasslands support yak grazing, southern valleys contain forests, and fertile river basins support agriculture like barley farming.

The plateau is the source of major Asian rivers like the Indus, Brahmaputra, Yangtze, Yellow River, Mekong, and Salween, supporting billions of people downstream.
Its vast elevated surface functions as a thermal engine. It shapes global air circulation and directly drives the intensity of the South Asian monsoon.