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- Title
A case study on heat source mechanism of high-temperature geothermal field.
- Authors
Junjie Ba; Chuntian Su; Yanqing li
- Abstract
The heat source mechanism is vital to the activity of high-temperature geothermal field. This paper analyses the intrusion era, scale and temperature of magma chamber and the radiation heat of basal granite in Ruidian geothermal field, a typical constrained heat source dominated by magma chamber in southwestern China. The analysis results show that: an intrusive high-temperature magma chamber was formed in Late Pleistocene in Gudong- Mazhan Belt, southern Yunnan Province; the magma chamber was an approximate ellipsoid with a 19km-long east-west axis, a 25km-long north-south axis, a 15km-height, and a highest temperature of 700°C. The basement of this geothermal field is biotite adamellite rich in radioactive elements (e.g. 238U, 232Th and 40K). The mean decay heat generation rate stands at 6.90μW/m³ and the estimated temperature is 116~120°C at the depth of 2km. In addition, the said magma chamber is the main heat source, whose radiogenic heat contributes to the temperature distribution of Ruidian high-temperature geothermal field. In this way, the author discovered the formation mechanism of Ruidian high temperature geothermal field, laying a solid basis for further research on heat source mechanism of geothermal fields.
- Subjects
GEOTHERMAL resources; HEAT transfer; MAGMAS; RADIATION; HIGH temperatures
- Publication
Annales de Chimie Science des Matériaux, 2018, Vol 42, Issue 1, p129
- ISSN
0151-9107
- Publication type
Article
- DOI
10.3166/ACSM.42.129-147