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**.