[3] The gas produced at Zau de Câmpie and in the surrounding area is considered to be the purest one; it consists of dry gases, usually made of 99% methane, with the rest being hydrocarbons (ethane, propane, and butane).

[13] That year, the local Greek Catholic priest announced to the Zau de Câmpie community that they will start "to dig for gas, in the form of the one from Sărmașel," on a 2,400 m2 (26,000 sq ft) plot of land belonging to the church.

[14] Besides Sărmășel and Zau de Câmpie, other gas fields developed in the area were the ones at Deleni, Nadeș, Bazna, and Șincai, followed later by those at Bogata, Ilimbav, Miercurea Nirajului, Tăuni, Teleac, and Filitelnic.

[15] The first geological study of the Zau de Câmpie gas dome (in connection with the classification of mud volcanoes and salt mines in the Transylvanian Plain) was done by Augustin Vancea [ro] in his 1929 Ph.D.

Concomitantly, the Ceanu Mare–Cluj pipeline was being constructed, with the Zau de Câmpie wells due to supply natural gas to the city of Cluj.