How big is the salt field discovered in Guyuan, Ningxia, and what is its reserve ranking?

The Ningxia Autonomous Region Mineral Geological Survey Institute found a thick and high-grade rock salt mineral layer in the drilling holes in an exploration area of ??about 30 square kilometers in Guyuan Niokou, seeking to obtain rock salt ore. The resource amount is more than 3 billion tons, and the thenardite resource amount is about 160 million tons. It is a national large-scale salt mine with prospective predicted reserves of more than 10 billion tons. It has the characteristics of shallow burial, large thickness, high grade, and easy mining. In addition to Gu Yuan's abundant coal and limestone resources, Ningxia decided to establish a "Gu Yuan Salt Chemical Circular Economy Poverty Alleviation Demonstration Zone".

The excerpt is very comprehensive!