Geology and Geochemistry of Rehai (Hot Sea) Geothermal Field in Tengchong, Yunnan Province, China

Abstract

Rehai (Hot Sea) in Tengchong is an important hydrothermal area in south-west China. It is a Cenozoic volcanic area produced by the convergence of Indian and Eurasian Plate. The surface activity is spread over 7.5 and the natural heat flow from the area is of ca. 125 The majority of springs in the area discharge near- neutral sodium water. The alkali thermometers suggest general reservoir base temperature of about Dissolved gas in the water is mainly values in the water indicate that a high proportion of hot water is derived from a meteoric source, but might contain a small amount of abyssal water. ë Finally, we calculate the heat content of the field as ca. 8.1 x 10^12 MJ.