scholarly journals Hydrogeochemical Characteristics and Evolution of Hot Springs in Eastern Tibetan Plateau Geothermal Belt, Western China: Insight from Multivariate Statistical Analysis

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Zheming Shi ◽  
Fu Liao ◽  
Guangcai Wang ◽  
Qingyu Xu ◽  
Wenqing Mu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Hot Springs ◽  
Water Environment ◽  
Western China ◽  
Eastern Tibetan Plateau ◽  
Energy Potential ◽  
Multivariate Statistical ◽  
Hydrochemical Evolution ◽  
Rock Interaction ◽  
Geological Origin

The eastern Tibetan Plateau geothermal belt is one of the important medium-high temperature geothermal belts in China. However, less work has been done on the hydrochemical characteristic and its geological origin. Understanding the chemical characteristics and the hydrochemical evolution processes is important in evaluating the geothermal energy potential in this area. In the present study, we discussed the hydrochemical properties and their origins of 39 hot springs located in the eastern Tibetan Plateau geothermal belt (Kangding-Litang-Batang geothermal belt). Cluster analysis and factor analysis are employed to character the hydrochemical properties of hot springs in different fault zones and the possible hydrochemical evolution processes of these hot springs. Our study shows that the hot springs can be divided into three groups based on their locations. The hot springs in the first group mainly originate from the volcanic rock and the springs in the second group originate from the metamorphic rock while the springs in the third group originate from the result of mixture of shallow water. Water-rock interaction, cation exchange, and the water environment are the three dominant factors that control the hydrochemical evolution process in the eastern Tibetan Plateau. These results are also in well agreement with the isotopic and chemical analysis.

scholarly journals Fluid Geochemistry of Fault Zone Hydrothermal System in the Yidun-Litang Area, Eastern Tibetan Plateau Geothermal Belt

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Yanyan Hou ◽  
Zheming Shi ◽  
Wenqing Mu
Keyword(s):  
Tibetan Plateau ◽  
Hot Springs ◽  
Hot Spring ◽  
Hydrothermal Systems ◽  
Significant Shift ◽  
Eastern Tibetan Plateau ◽  
Reservoir Temperature ◽  
Rock Interaction ◽  
Geothermal Potential ◽  
Type Water

The geochemical and geothermal characteristics of hydrothermal systems in an area are useful information to appropriately evaluate the geothermal potential. In this paper, we investigated the chemical and isotopic composition of thermal water in an underexploited geothermal belt, Yidun-Litang area, in eastern Tibetan Plateau. 24 hot spring samples from the Yidun and Litang area were collected and analyzed. The water chemical types of the hot springs are mainly Na-HCO3-type water. Water-rock interaction and cation exchange and mixture are the dominant hydrogeochemical processes in the hydrothermal evolution. The significant shift of D and 18O isotopes from the GMWL indicates that these springs have undergone subsurface boiling before rising to the surface. Different ratios of Cl to other conservation species can be found for the springs in Litang and Yidun areas, suggesting the different heat sources of the two hydrothermal systems. The reservoir temperature in the Yidun area is around 230°C while the reservoir temperature in the Litang area is around 200°C. Both hydrothermal systems are recharged by the meteoric water and are heated by the different deep, thermally and topographically driven convection heat along faults and undergoing subsurface boiling before going back to the surface.

Distribution and genesis of the eastern Tibetan Plateau geothermal belt, western China

2016 ◽  
Vol 76 (1) ◽  
Author(s):  
Xianchun Tang ◽  
Jian Zhang ◽  
Zhonghe Pang ◽  
Shengbiao Hu ◽  
Ying Wu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Western China ◽  
Eastern Tibetan Plateau

Abundance and composition dynamics of soil ammonia-oxidizing archaea in an alpine fir forest on the eastern Tibetan Plateau of China

2012 ◽  
Vol 58 (5) ◽  
pp. 572-580 ◽  
Author(s):  
Ao Wang ◽  
Fu-Zhong Wu ◽  
Wan-Qin Yang ◽  
Zhi-Chao Wu ◽  
Xu-Xi Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Soil Temperature ◽  
Coniferous Forest ◽  
Amoa Gene ◽  
Western China ◽  
Gene Copy ◽  
Ammonia Oxidizing Bacteria ◽  
Eastern Tibetan Plateau ◽  
Dominant Group ◽  
Ammonia Oxidizing Archaea

Real-time qPCR and clone library sequencing targeting amoA genes were used to investigate the seasonal dynamics of an ammonia-oxidizing archaea (AOA) community in an alpine fir forest in western China. AOA were detected at all sampling dates, and there were significant variations in archaeal amoA gene copy numbers (7.63 × 105to 8.35 × 108per gram of dry soil) throughout the nongrowing season. Compared with ammonia-oxidizing bacteria (AOB), the AOA displayed a higher abundance on the majority of sampling dates during the freeze–thaw period. All of the AOA sequences fell within soil and sediment lineages and were affiliated with 7 clusters. Compared with the other clusters, cluster 1 was more sensitive to low temperature and was the dominant group in August. In contrast, cluster 3 dominated the AOA community in winter and probably represents a group of cold-adapted archaea. Redundancy analysis (RDA) revealed that the seasonality of the AOA community was mainly attributed to changes in soil temperature and nutrient availability (e.g., dissolved organic nitrogen and carbon). Our results indicate that AOA exist in frozen soils in the alpine coniferous forest ecosystem of the eastern Tibetan Plateau. Moreover, soil temperature may directly and (or) indirectly affect AOA abundance and composition and may further influence the soil N cycle during the winter.

scholarly journals Short-Term Seismic Precursor Anomalies of Hydrogen Concentration in Luojishan Hot Spring Bubbling Gas, Eastern Tibetan Plateau

2021 ◽  
Vol 8 ◽  
Author(s):  
Xiaocheng Zhou ◽  
Yucong Yan ◽  
Wenya Fang ◽  
Wanli Wang ◽  
Hongyu Shi ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Hydrogen Concentration ◽  
Hot Springs ◽  
Hot Spring ◽  
Isotope Ratios ◽  
Fault System ◽  
Eastern Tibetan Plateau ◽  
Short Term ◽  
Wide Range ◽  
Seismic Precursor

The gas compositions (He, H2, CO2, CH4, Ar and N2) and isotope ratios (3He/4He and δ13C) were yearly investigated from April 2010 to April 2019 at the Luojishan spring located in the proximity of the Zemuhe Fault, eastern Tibetan Plateau. The continuous automatic monitoring of hydrogen concentrations in Luojishan hot spring bubbling gas for the purpose of earthquake prediction requires the discrimination of seismic precursor anomalies. Helium isotope ratios (3He/4He) in the bubbling gas of hot springs varied from 0.05 to 0.18 Ra (Ra = 3He/4He = 1.39 × 10−6 in the air), with a maximum mantle-derived He up to 2.2% of the total He measured in the Luojishan hot spring (assuming R/Ra = 8.0 for mantle). This suggests that Zemuhe Fault might act as a conduit for crustal-derived fluid. N2 concentrations in the majority of the hot spring was ≥80 vol%, and δ13CCO2 values varied from −13.2 to −9.3‰ (vs.PDB). Hydrogen concentration time series display a complex temporal pattern reflecting a wide range of different physical processes. There were short-term (5–60 h) seismic precursor anomalies of hydrogen concentration before natural earthquake. The anthropogenically-induced earthquakes provoke only post-earthquake responses. The concentration of hydrogen in bubbling gas of the Luojishan hot spring is sensitive to increase of stress in the Xianshuihe-Xiaojiang fault system. Monitoring the hydrogen concentrations with automatic gas stations may be promising tool for unraveling earthquake mechanisms and for predicting earthquakes.

scholarly journals The eastern Tibetan Plateau geothermal belt, western China: Geology, geophysics, genesis, and hydrothermal system

2017 ◽  
Vol 717 ◽  
pp. 433-448 ◽  
Author(s):  
Xianchun Tang ◽  
Jian Zhang ◽  
Zhonghe Pang ◽  
Shengbiao Hu ◽  
Jiao Tian ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Hydrothermal System ◽  
Western China ◽  
Eastern Tibetan Plateau
Sign in / Sign up

Export Citation Format

Share Document