The hot spring was formed 900 years ago by a hydrothermal eruption. Its crater is around 65 m in diameter with a maximum depth of approximately 62 m and is filled with an estimated volume of 50,000 m3 of geothermal fluid.
Waiotapu, also spelled Wai-O-Tapu (Māori for “sacred waters”) is an active geothermal area at the southern end of the Okataina Volcanic Centre, just north of the Reporoa caldera, in New Zealand’s Taupo Volcanic Zone. It is 27 kilometers south of Rotorua.
The Champagne Pool is part of an extraordinary volcanic lake. Its geothermal fluid volume reaches about 50,000 cubic meters of water and gas. The deepest waters of the Champagne Pool reach temperatures of about 260°C, while on the surface it reaches about 71°C.
The vibrant colors come from a rich deposition of minerals and silicate. The silicate structures around the edge of the pool are teeming with microbial life. Silica is lined with bright orange from antimony-rich deposits that solidify out of the cooler water. Mercury, thallium, gold, and silver are also deposited in the rocks.
Excess water flows out of the Champagne Pool to feed another geothermal pool called Artist’s Palette, which is yellow in color because of the sulfur deposit. From there the water flows over silica mud flats to Primrose Sinister Terrace and down Primrose Terrace forming beautiful and fragile silica deposits.
According to the Internet