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对胶东半岛出露的14处温泉的水化学特征、同位素特征进行了分析,得出胶东半岛温泉水的来源主要为大气降水补给、海水补给,年龄以现代水为主。胶东半岛温泉水与围岩矿物未达到完全平衡,不适宜用Na,K,Mg地热温标,玉髓的地热温标显示胶东半岛温泉热储温度在81.26~108.93℃之间。对下一步胶东半岛的温泉地热勘查、开发利用具有指导意义。 相似文献
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长期以来,西藏昌都觉拥温泉处于天然状态,研究该地热显示区的温泉水化学特征、确定热储温度对于下一步的综合开发利用及热害防治具有重要的现实研究意义。通过采集区内冷水及温泉水样品,进行水化学全分析及氢氧同位素分析,探讨觉拥温泉水化学特征、地下热水补给高程、热储温度及循环深度。基于数据测试结果研究得出觉拥温泉水化学类型与地表水及冷泉水不同,为HCO~-_3—Na~+型,并富含多种微量元素。利用氢氧稳定同位素数据,计算得出补给高程为4725~4802 m。利用Na~+—K~+—Mg~(2+)平衡图判断该区地下热水为未成熟水,并有冷水混入。建立硅—焓、氯—焓混合模型,分析得出觉拥热储温度为137℃左右;综合以上数据计算得出热储深度约为3801 m。 相似文献
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招远地热田位于胶东隆起区,元古代蚀变花岗岩分布广泛,地下热水微量元素丰富。为查明地下热水微量组分的赋存条件、花岗岩热储环境与地热资源量,利用地下热水水化学分析、热储分析及有效能源换算法,建立Gibbs模型,进行PHREEQC模拟并开展热储估算。研究结果显示:(1)地下热水水化学类型为Cl—Na型,与海水水化学类型一致,... 相似文献
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通过对柯街断裂带上2个温泉(梁园温泉和大地温泉)水样的阴阳离子分析,正确划分了温泉水的水化学类型;同位素数据表明,2个样品的δD和δ18 O值均在大气降水线附近,且未显示δ18 O值向右漂移现象,说明该区地下热水具有现代大气降水的氢氧同位素组成特征,推断温泉形成与火山、岩浆型热源没有直接关系。大气降水的同位素组成与海拔高程之间的耦合关系,证明了地下热水补给源区位于西部山区;通过采用SiO2温标计算得出了温泉的热储温度和热水循环深度。梁园温泉热储温度为100.1℃,热水循环深度是1 643.3m,大地温泉热储温度为79.8℃,热水循环深度是1 237.2m。柯街断裂带的构造特征及岩性特征与地下热水的水化学组成、深循环机制和冷热水的混合机制有着本质的联系。 相似文献
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勐阿街温泉地处云南西南部勐阿盆地,现主要有4个温泉出露点,在澜沧江断裂带西侧沿NW向小型断裂磨刀河—曼懂断裂带出露。地下热储带分布于华力西期—印支期的中酸性侵入岩中,热水富集在花岗岩断裂破碎带及断裂交汇位置。温泉近20年来主要成分未发生较大变化,温泉矿化度较低(0.31~0.34 g/L),水化学类型为HCO3—Na型,为中低温、弱碱性温泉。热水中F-含量为12.8~13.2 mg/L,H2SiO3含量为52.5~67.6 mg/L,含有锂、锶、钨等微量元素。温泉水化学类型成因为含CO2的地下水对花岗岩体发生溶滤作用而形成,F-含量高可能是由于溶解了花岗岩中含氟的黑云母,H2SiO3含量较高的原因是温泉水与含硅酸盐岩的岩石发生大面积接触溶滤作用。氢氧稳定同位素组成表明勐阿街温泉的补给水源为大气降水,并具有轻微的18O漂移现象,表明水与围岩的氧同位素交换程度较高,热储温度较高。用同位素方法估算温泉的补给区高程在1 200 m左右,补给温度约为10 ℃,推测温泉水源主要来自勐阿街盆地周围山地的大气降水,计算得热储温度为93~104 ℃。勐阿街温泉成因为其周围山区大气降水入渗补给后,经历深循环受大地热流加热后,沿断裂带上升出露成泉。热水在上升途中与浅部冷水相遇,冷水混合比例52%~76%,热水循环深度为3 000~3 360 m。 相似文献
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西藏水热活动区处于印度大陆与亚洲大陆碰撞造山带的关键地带,隶属于地中海—喜马拉雅地热带,水热资源丰富,作为了解地质构造演化、地热系统、气候变化的重要窗口之一,一直是地学界的研究热点。本文利用西藏地区336个温泉水化学数据,采用多种地球化学温标对区域内热储温度进行了评估,揭示了地热异常空间分布规律,并探究其地质环境效应。结果表明:泉口热水温度介于10.12~97.64℃,其中60℃以上占总样本的38.9%;热储温度介于87.12~277.64℃,其中87.12~120℃的占18.7%,在120~200℃的占40.5%,高于200℃的占40.8%,显示区内中高温地热系统分布广泛。高温热储区集中于藏南,有南强北弱特点,并沿着断裂带以"簇丛"状分布,可初略划分为狮泉河—玛旁雍区、措勤—搭格架区、当雄—羊八井—定日带、雅鲁藏布江大拐弯区4个区。温泉密度和高温热储区与SN向的断裂带及地震活动性在空间上有较好的匹配关系。 相似文献
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为分析总结贵州省水热型地热资源分布特征和水化学特征,对省内天然温泉和地热井流体进行调查和采样测试,在全面收集已有最新地热勘查资料的基础上,通过地热资源地质勘查、评价相关标准和规范以及流体水化学Piper三线图分析等,划分地热资源类型,分析资源分布、资源富集和热储特征,研究不同构造区、不同热储中流体水文地球化学、微量元素等特征。结果表明: 贵州省水热型地热资源主要分布于黔中及黔北地区,属低温地热资源,类型以隆起(褶皱)断裂型为主,以层状兼带状热储分布最广; 地热流体富集和出露受构造控制明显,在石阡、遵义、贵阳、息烽等地形成以震旦系、寒武系白云岩热储为主的4大地热资源富集区,动态较稳定; 相同构造区和热储中流体水化学特征基本相似,水化学类型总体以重碳酸盐型为主,具有矿化度低、富含锶、偏硅酸、氟、氡等对人体有益的微量元素和放射性成分等特征。 相似文献
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为探讨广安市铜锣山背斜三叠纪岩溶热储特征、地热水水化学与同位素组成、热储温度及地热水循环机理,采用地热钻探、水化学与同位素取样测试、热水溶质组分图解分析等手段和方法,开展了地热水成因的研究工作。结果表明:研究区三叠纪碳酸盐岩热储结构相对完整,热储盖层、热储层和热储下部隔水层形成独立的地热水文地质单元。岩溶地热水水化学类型主要为SO4-Ca·Mg和SO4-Ca型,富含F、Sr、Li、B和SiO2物质,其水源补给为大气降水,补给区位于铜锣山以北的大巴山一带,深部地热水补给高程大于1 100 m,补给区年均温度为9 ℃。热储温度为56~76 ℃,热水循环深度为2 013~3 030 m。地热水在循环过程中,主要发生碳酸盐岩和蒸发岩溶解、冷热水混合过程,且冷水混入比例大于80%。结合区域地热地质条件,构建了研究区地热水成因概念模型。 相似文献
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Semnan thermal springs with high TDS and moderate temperature are located northwest of Semnan, the northern part of Iran. The spatial and temporal variations of physicochemical characteristics of the thermal and cold springs were investigated for the recognition of origin and dominant hydrogeochemical processes. Results show that the thermal springs have the same origin, but due to different ascending flow paths and different conductive cooling mechanism, their temperatures vary. The chemical composition of thermal waters is controlled by dolomite, halite and sulfate minerals dissolution and calcite precipitation and bacterial sulfate reduction. The concentration of major and trace elements in the thermal springs does not change in wet and dry seasons notably because they are derived from old groundwater with deep circulation and high temperature. Seasonal change in the concentration of some trace elements is due to the seasonal variation of pH, Eh, temperature and dilution by shallow waters. Decreasing SO4 and carbonate saturation index and increasing Na/Cl ratios and Ca content in the dry season show dilution effect caused by the previous heavy rainfall events. The temperature of the heating reservoir based on K–Mg, chalcedony, quartz and chemical equilibrium approach was approximately estimated in the range of 60–80 °C. Hydrogeologically, a conceptual model was suggested for the thermal springs. The general groundwater flow direction is probably from the dolomite Lar Formation in Chenaran anticline toward the adjacent syncline in a confined condition, and then a thrust fault acts as a conduit and redirects the thermal water to the emerging springs at the surface. 相似文献
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西藏朗久地热田及其温泉水化学特征研究 总被引:4,自引:3,他引:1
西藏朗久地热田位于喜马拉雅——冈底斯微板块北西缘,区内构造、岩浆与变质作用强烈,在构造活动与河流的共同作用下其热储盖层遭到严重破坏,导致冷、热水发生混合。区内碳酸盐岩广布,未完全冷却的花岗岩为地热田的热源,热储平衡温度在191.11~213.85℃之间。区内地表水为HCO3-Ca型,温泉水阴离子为Cl-HCO3型,阳离子为K-Na型。温泉水TDS为2000~2300mg/L,Na+/Cl->1,其演化程度介于部分成熟水与未成熟水之间,水岩反应尚未达到平衡。几种典型热液矿物饱和度指数均大于零,区内热液蚀变作用对温泉水化学组成贡献较大;温泉水PCO2>2000Pa,与背景值形成较大的梯度差,会发生强烈的CO2脱气。 相似文献
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Geothermal water is plentiful in Changbai Mountain region, northeastern China, due to the volcanic activities and widespread faults. For the exploration of geothermal resources, this study uses quartz and cation geothermometer to estimate the temperatures of the geothermal reservoir and uses the tubular models to evaluate the thermal gradient. The hydrogeochemical characteristics of the geothermal resources were also evaluated by hydrogeochemical analysis. The results showed that the geothermal reservoir temperatures of the four major thermal springs in Changbai Mountain region range from 72 to 169 °C. The average geothermal reservoir temperatures of Jinjiang hot springs, Changbai hot springs I, Xianrenqiao hot springs, and Changbai hot springs II are 129.25, 169, 89, and 73.67 °C, respectively. The geothermal gradient values of the four major thermal springs have different characteristics. The geothermal gradient values of Jinjiang hot springs and Changbai hot springs I are 4.6 and 3.1 °C/100 m, respectively. The geothermal gradient values of Xianrenqiao thermal springs and Changbai thermal springs II are both lower than 1.5 °C/100 m, with the values of 1.1 and 1.4 °C/100 m. And the geothermal gradients are influenced by Changbai Mountain Tianchi volcano. In addition, the water chemical analyses showed that the geothermal water types are HCO3-Na with higher concentrations of Na+, Cl?, SO4 2?, TDS, and HCO3 ? than the non-thermal waters, which suggested a deep and long water cycle of the thermal water, and therefore a sufficient water-rock interaction. 相似文献
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Xiaocui Wang Xun Zhou Yuhui Zheng Chao Song Mi Long Ting Chen Zhenhua Ren Miaolin Yang Xiaolu Li Juan Guo 《Environmental Earth Sciences》2017,76(14):487
The Lanping–Simao basin characterized by the occurrence of hydrothermal activities in the northern part of the basin is the largest depression basin in western Yunnan Province. Hot springs outcrop in the semi-drought red layers (TDS, 0.644–8.17 g/L). Mixing with shallow cold water in the flow system is the dominant hydrogeological process leading to the decrease in thermal water temperature and complex hydrochemical compositions with water types ranging from HCO3–Ca·Mg to Cl–Na type. According to the silicon concentration and enthalpy evaluation, the geothermal reservoir temperatures are estimated between 118 and 204 °C, and the mixing ratio between cold and thermal groundwater is 0.76 on the average. The high concentrations of Na and Cl indicate that there is some well-mineralized cold water in the flow system circulating to the upward migration path accompanied with intense water–rock reactions in the fault developed basin. Ca and SO4 originate from progressively longer flow path owing to the poor solubility of gypsum, anhydrite and Ca–montmorillonite. Hierarchical clustering and multivariate statistical methods recognized three hot springs groups and four parameters groups which classified the reservoir environment into two situations, one is in the high-pressure environment with intense degassing, and the other is in the lower pressure with weak minerals migration. 相似文献
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中川地区载金矿物硫同位素、氢氧同位素和碳氧同位素特征说明成矿作用与沉积建造有较大的亲缘性。载金矿物流体包裹体中大量的 Cl- 、SO4 2 - 和 Ca2 、Na 高含量及其特征比值显示出大气降水带入了大量的建造中的物质成分。热液期黄铁矿微量元素标型特征体现地下热卤水溶滤成因特征 ,同时也显示了岩浆活动对成矿作用影响的痕迹 相似文献
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为研究四川省康定市二道桥地区地下热水稳定同位素特征和热储温度,对二道桥地区5个温泉(井)即二道桥温泉(SC107、SC107-2)、康巴人家温泉(SC107-3)、自流热水井(SC107-4)、自喷热水井(SC107-5)进行调查和分析。研究区温泉的分布及出露主要受雅拉沟断裂和雅拉河谷控制。温泉水温33.2~46 ℃,为中低温温泉,pH为6~6.5。水样的氢氧稳定同位素特征表明研究区地下热水的补给来源为大气降水。利用氢氧稳定同位素高程效应及温度效应估算区内地下热水补给区高程为3 000~4 500 m,补给区温度为-3.5~-0.3 ℃,表明地下热水有一部分补给源自附近山区的冰雪融水。Na-K-Mg三角图显示研究区热水均为未成熟水,不宜用阳离子地热温标计算热储温度。应用SiO2地热温标、多矿物饱和指数法以及用固定铝方法对部分温泉多矿物平衡图进行修正,得出研究区地下热水的热储温度为65~75 ℃。研究区温泉在东部跑马山以及西部农戈山附近接受大气降水补给,降水沿着大雪山—农戈山断裂和跑马山断裂下渗,地下水经历深循环,在此过程中获得大地热流加热,最终在雅拉河谷雅拉沟断裂附近出露成泉。 相似文献
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