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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

46

期数:

2023年01期

页码:

26-36

栏目:

地震地下流体监测预报理论及技术应用专栏

出版日期:

2023-01-01

文章信息/Info

Title:

Hydrogeochemical Characteristics of the Hot Springs in the Daliangshan Fault Zone

作者:

赵德杨¹; 周晓成²; 何 苗²; 天 娇²; 李静超²; 董金元²; 颜玉聪²; 欧阳澍培²; 刘峰立²; 姚炳宇²; 王昱文²; 曾召君²; 陈曲菲³; 张晓明¹; 杨 耀¹; 罗志鑫²

(1.四川省地震局,四川 成都 610041; 2.中国地震局预测研究所 高压物理与地震科技联合实验室,北京 100036; 3.新疆维吾尔自治区消防救援总队 乌鲁木齐市消防救援支队经济技术开发区大队,新疆 乌鲁木齐 830009)

Author(s):

ZHAO Deyang¹; ZHOU Xiaocheng²; HE Miao²; TIAN Jiao²; LI Jingchao²; DONG Jinyuan²; YAN Yucong²; OUYANG Shupei²; LIU Fengli²; YAO Bingyu²; WANG Yuwen²; ZENG Zhaojun²; CHEN Qufei³; ZHANG Xiaoming¹; YANG Yao¹; LUO Zhixin²

(1.Sichuan Earthquake Agency,Chengdu 610041,Sichuan,China)(2.United Laboratory of High-Pressure Physics and Earthquake Science,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)(3.Economic and Technological Development Zone Brigade,Fire and Rescue Detachment of Urumqi,Fire and Rescue Department of Xinjiang Uygur Autonomous Pegion,Urumqi 830009,Xinjiang,China)

关键词:

大凉山断裂带;  温泉;  水文地球化学;  循环模型

Keywords:

the Daliangshan Fault Zone;  hot spring;  hydrogeochemistry;  circulation model

分类号:

P315.724

DOI:

10.20015/j.cnki.ISSN1000-0666.2023.0003

摘要:

2010—2021年对大凉山断裂带10个温泉开展采样,测定了15个水样中的常量元素和氢氧同位素,进行温泉水文地球化学特征研究,建立了温泉水文地球化学循环模型。研究结果表明:①δD、δ¹⁸O的测量值分别为-86.8%～-100.54%和-11.7%～-13.7%,分布于大气降水线附近,表明大凉山断裂带温泉水主要为大气降水补给,其补给高程为2.1～2.5 km; ②温泉水化学类型主要有HCO₃-Ca·Mg、SO₄·HCO₃-Ca·Mg、HCO₃-Ca、HCO₃-Na·Ca、HCO₃-Na和SO₄·HCO₃-Ca; ③主量元素来自碳酸盐矿物和硅酸盐矿物的水-岩反应; ④Na-K-Mg三角图表明该区温泉水样均为未成熟水; ⑤运用硅-焓模型图解法得到该区热储温度为105.9 ℃～203 ℃,冷水混入比例约为68%～86%,其循环深度为1.9～3.9 km; ⑥循环深度越深,地震活动性越强。

Abstract:

The major elements,trace elements,and stable isotopes of 15 water samples collected from 10 thermal springs in the Daliangshan Fault Zone from 2010 to 2021 are measured to study the hydrogeochemical characteristics,and a model of hydrogeochemical migration of the hot springs in the Daliangshan Fault Zone is built.The results show that:①The values of the stable isotopes(δD and δ¹⁸O)are -86.8%—-100.54% and -11.7%—-13.7%,respectively, distributing near the atmospheric precipitation line; this indicates that the hot-spring water are recharged by the meteoric water at the elevations ranging from 2.1 km to 2.5 km.②From the north to the south of the Fault Zone,the chemical types of the hot-spring water are HCO₃-Ca·Mg,SO₄·HCO₃-Ca·Mg,HCO₃-Ca,HCO₃-Na·Ca,HCO₃-Na,and SO₄·HCO₃-Ca.③The major elements come from the water-rock reaction of carbonate minerals and silicate minerals.④The Na-K-Mg triangle diagram shows that the hot spring samples belong to “immature water”.⑤The silicon-enthalpy model is used and the geothermal reservoir temperature in this area is estimated to be between 105.9 ℃—203 ℃,the mixing ratio of the cold water is 68%—86%,and the circulation depth is 1.9 km—3.9 km.⑥The deeper the circulation of the hot-spring water is,the stronger the seismicity in the area will be.

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备注/Memo

备注/Memo:

收稿日期:2022-06-18.
基金项目:中国地震局地震预测研究所基本科研业务费(CEAIEF20220507,CEAIEF2022030205,CEAIEF20220213,2021IEF0101,2021IEF0201,2021IEF1201)、国家重点研发计划(2017YFC1500501,2019YFC1509203),国家自然科学基金面上项目(41673106,42073063,4193000170)、四川省地震局科技专项(LY2214)和四川省自然科学基金(2022NSFSC0210)联合资助.
第一作者简介:赵德杨(1987-),工程师,主要从事地震地下流体监测与研究.E-mail:oegiin@163.com.
通讯作者简介:周晓成(1978-),研究员,主要从事构造地球化学、流体地球化学研究.E-mail:zhouxiaocheng188@163.com.

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