Geothermal regime and implications for basin resource exploration in the Qaidam Basin, northern Tibetan Plateau

Pang, Yumao; Zou, Kaizhen; Guo, Xingwei; Chen, Yan; Zhao, Jun; Zhou, Fei; Zhu, Jun; Duan, Lian; Yang, Guoxin

doi:10.1016/j.jseaes.2022.105400

Cited by 15 publications

(2 citation statements)

References 29 publications

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“…However, as the Eastern Kunlun Fault Zone serves as the boundary of the Qaidam Basin, its eastern topography and geological lithology bear similarities to our research area and are contiguous with it. Therefore, we have chosen to approximate the geothermal gradient within our study area by utilizing a geothermal gradient of 3.1°C per 100 meters derived from the eastern part of the Qaidam Basin to represent this parameter [74]. In the research region, we assume that the annual average temperature (T0) in our study area is -3.7°C.…”

Section: Reservoir Temperature and Circulation Depthmentioning

confidence: 99%

Hydrogeochemical Characteristics of Earthquake-Related varied-temperature Springs along the Eastern Kunlun Fault Zone, China

Lu,

Zhou,

Jiang

et al. 2024

Preprint

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The Eastern Kunlun Fault Zone (EKFZ) is located in a seismic blank area. This study investigates the hydrogeochemical characteristics of varied-temperature springs in the EKFZ to understand the relationship between fractures, fluids and earthquakes. It aids in establishing their induction mechanisms and assists in monitoring the earthquake precursors of the EKFZ. In this study, the main elements, trace elements, hydrogen and oxygen isotopes and strontium isotopes of 23 varied-temperature springs in the EKFZ were analyzed. The results reveal the source of groundwater recharge, hydrochemical types, mineral saturation, and for a select few springs indicative of geothermal activity, collected geothermal reservoir temperatures. The study also explores the relationship between earthquakes and springs, identifying sensitive chemical indicators. Based on continuous monitoring at Maqu Station, we found that before the occurrence of the Maerkang Ms 6.0 earthquake, the concentration of Cl− rose by 2.9 times, and 46 days before the Gande earthquake (Ms = 4.7), the concentrations of Na+ and SO42− significantly increased. Finally, a conceptual model of the hydrogeochemistry of springs is presented to describe the groundwater circulation in the study area. This research is of great significance for the analysis of fluid geochemistry in this area and for assessing the seismic hazards of the EKFZ.

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Section: Reservoir Temperature and Circulation Depthmentioning

confidence: 99%

Hydrogeochemical Characteristics of Earthquake-Related varied-temperature Springs along the Eastern Kunlun Fault Zone, China

Lu,

Zhou,

Jiang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…However, as the Eastern Kunlun Fault Zone serves as the boundary of the Qaidam Basin, its eastern topography and geological lithology bear similarities to our research area and are contiguous with it. Therefore, we have chosen to approximate the geothermal gradient within our study area by utilizing a geothermal gradient of 3.1 • C per 100 m, derived from the eastern part of the Qaidam Basin, to represent this parameter [67]. In the research region, we assume that the annual average temperature (T 0 ) in our study area is −3.7 • C. The thickness of the isothermal layer (Z 0 ) refers to the depth at which the range of ground temperature variation is nearly zero.…”

Section: Reservoir Temperature and Circulation Depthmentioning

confidence: 99%

The Hydrogeochemistry of and Earthquake-Related Chemical Variations in the Springs along the Eastern Kunlun Fault Zone, China

Lu,

Zhou,

Jiang

et al. 2024

Water

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The Eastern Kunlun Fault (EKF) is situated in an area with a history of significant seismic events, yet it has witnessed a dearth of major earthquakes in recent years. This study conducted a detailed analysis of the hydrogeochemical characteristics of the springs in the EKF and their temporal variation, aiming to address the gaps in the research on the hydrogeochemistry in the region and to investigate the changes in water chemistry during the seismogenic process. In this study, the main elements, trace elements, hydrogen isotopes, oxygen isotopes, and strontium isotopes of 23 springs in the EKF were analyzed. The results indicated that the groundwater recharge in the eastern part of the Eastern Kunlun Fault Zone mainly originates from atmospheric precipitation, as supported by its isotopic characteristics. The spring water is immature, showing weak water–rock interactions. A hydrochemical analysis classified the springs into 11 main types, reflecting varying degrees of water–rock interaction. Based on measurements using quartz geothermometers, the estimated geothermal reservoir temperatures ranged from 39.6 to 120.3 °C, with circulation depths of 1.3 to 3.8 km. By means of regularly monitoring three selected springs, this study also explored the relationship between earthquakes and hot spring chemical variations. Finally, a conceptual model of hydrogeochemistry was proposed to describe the groundwater circulation in the study area.

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Spatio-temporal variations of atmospheric methane and its response to climate on the Tibetan Plateau from 2010 to 2022

Wei,

Yang,

Qiu

et al. 2023

Atmospheric Environment

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Geothermal regime and implications for basin resource exploration in the Qaidam Basin, northern Tibetan Plateau

Cited by 15 publications

References 29 publications

Hydrogeochemical Characteristics of Earthquake-Related varied-temperature Springs along the Eastern Kunlun Fault Zone, China

Hydrogeochemical Characteristics of Earthquake-Related varied-temperature Springs along the Eastern Kunlun Fault Zone, China

The Hydrogeochemistry of and Earthquake-Related Chemical Variations in the Springs along the Eastern Kunlun Fault Zone, China

Spatio-temporal variations of atmospheric methane and its response to climate on the Tibetan Plateau from 2010 to 2022

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