广东神灶海上温泉的流体地球化学特征及循环模式

天娇; 李义曼; 范翼帆; 周晓成

doi:10.3799/dqkx.2022.222

Volume 48 Issue 3

Mar. 2023

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Article Navigation > Earth Science > 2023 > 48(3): 894-907

Tian Jiao, Li Yiman, Fan Yifan, Zhou Xiaocheng, 2023. Geochemical Characteristics and Circulation Conceptual Model of Geothermal Fluid in the Shenzao Coastal Hot Springs in Guangdong Province. Earth Science, 48(3): 894-907. doi: 10.3799/dqkx.2022.222

Citation:

Tian Jiao, Li Yiman, Fan Yifan, Zhou Xiaocheng, 2023. Geochemical Characteristics and Circulation Conceptual Model of Geothermal Fluid in the Shenzao Coastal Hot Springs in Guangdong Province. Earth Science, 48(3): 894-907. doi: 10.3799/dqkx.2022.222

Citation:

Tian Jiao, Li Yiman, Fan Yifan, Zhou Xiaocheng, 2023. Geochemical Characteristics and Circulation Conceptual Model of Geothermal Fluid in the Shenzao Coastal Hot Springs in Guangdong Province. Earth Science, 48(3): 894-907. doi: 10.3799/dqkx.2022.222

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Geochemical Characteristics and Circulation Conceptual Model of Geothermal Fluid in the Shenzao Coastal Hot Springs in Guangdong Province

doi: 10.3799/dqkx.2022.222

Tian Jiao^{1, 2
,
,},
Li Yiman^{2
,
,},
Fan Yifan³,
Zhou Xiaocheng¹

1.
Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China
2.
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
3.
Institute of Science and Technology, China Three Gorges Corporation, Beijing 100038, China

Received Date: 2022-04-29
Available Online: 2023-03-27
Publish Date: 2023-03-25

Abstract

Abstract

Shenzao hot springs are exposed in seawater and it is significant to reveal the circulation mechanism of geothermal fluids for the sustainable development and utilization of geothermal resources. By collecting samples of geothermal water, geothermal gas and the seawater, and testing the chemical and isotopic compositions of the samples, this study draws the following conclusions: the hot spring water is of Cl-Na-Ca type, recharged by the precipitation; the dissolved constituents are mainly derived from the dissolution of silicates and mixture with the seawater, with a mixing ratio of 29%-32%. According to the hydrochemical geothermometers, the reservoir temperature is 130 ℃, implying a circulation depth of 4 km. The atmospheric-derived N₂ is the dominant component in geothermal gas and the CO₂, CH₄ are thermogenic products of the crustal organic sediments. In addition, the helium isotopic compositions suggest that the mantle contribution is less than 5% and the local heat flow value is about 67-69 mW/m². Therefore, the Shenzao geothermal system is a medium-temperature convective system mainly heated by the crustal radiogenic heat source.
- hot springs in the sea,
- hydrochemistry of hot spring,
- chemistry of geothermal gas,
- circulation model of geothermal fluid,
- reservoir temperature,
- geochemistry

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References(55)

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Geochemical Characteristics and Circulation Conceptual Model of Geothermal Fluid in the Shenzao Coastal Hot Springs in Guangdong Province

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