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- Title
西藏谷露地热田水热系统成因机制.
- Authors
万汉平; 张松; 高洪雷; 郝伟林; 胡志华; 胡先才; 吴儒杰
- Abstract
Gulu Geothermal Field is a typical high-temperature geothermal field located in Yadong-Gulu Rift Zone in southeastern Tibet. Analysis on the hydrothermal system and its formation mechanism in Gulu Geothermal Field is of significant scientific and practical importance for the development of high-temperature geothermal resources in the Yadong-Gulu Rift Zone and even the entire southern Tibetan region. Based on the deep thermal and hydraulic conditions, as well as the tectonic control on heat,the formation mechanism of the hydrothermal system in Gulu Geothermal Field was discussed. It is believed that Gulu Geothermal Field belongs to a high-temperature hydrothermal system related to a magma reservoir. The glacier located at the elevation of 4 860 to 5 200 m by the west side of the basin, is the main source of deep geothermal fluid replenishment in Gulu Geothermal Field. During the deep circulation process,the melted water is being heated by the north-south trending conductive structures and mixed with a considerable proportion of residual magma fluid, forming deep high-temperature geothermal fluid. The deep geothermal fluid mainly migrates upwards along the intersection of the north-south trending fault F4-2 and the northeast-trending fault, and it emerges at the surface as boiling springs and warm springs,forming the present-day north-south spring terraces. Additionally,the geothermal fluid is mainly stored in the extensional spaces formed by the intersection of the north-south trending fault and the northeast-trending fault. Four finished well in the west of Sangqu River in Gulu Geothermal Field have encountered high-grade heat reservoirs. The drilling results indicate that the deep hydrothermal activity in Gulu Geothermal Field is mainly developed on the western bank of Sangqu River, with stronger hydrothermal activity and higher-grade heat reservoirs in the northern part of the field.
- Subjects
TIBET (China); GEOTHERMAL resources; MELTWATER; RIPARIAN areas; MAGMAS; RIFTS (Geology); GLACIERS
- Publication
World Nuclear Geoscience, 2023, Vol 40, Issue 3, p687
- ISSN
1672-0636
- Publication type
Article
- DOI
10.3969/j.issn.1672-0636.2023.03.001