共查询到19条相似文献,搜索用时 432 毫秒
1.
福建无岩浆热源的深循环水热系统 总被引:1,自引:0,他引:1
近年来对福建省存在具有岩浆热源的高温水热系统的呼声甚高。因而在福建是否可能存在具有岩浆热源的高温热田再次成为必须回答的重要问题。在综述前人研究成果的基础上,论述了福建省地热活动的地质构造背景、温泉分布状况、地热系统的特征、深部是否存在岩浆热源以及地壳的热结构,系统论述了福建深循环水热系统的特征。认为由于地质构造条件所决定,福建有大量的温泉出露,其中大部分为中温水热系统(90~150 ℃)和低温水热系统(<90 ℃),均属受断裂控制的深循环水热系统,皆为温水热储。极少数高温热水系统(>150 ℃)也仅仅是地下水沿断裂循环的深度较大所致。笔者认为福建不具备形成“有岩浆热源的水热对流系统”的条件。 相似文献
2.
洛阳市龙门温泉成因探讨 总被引:1,自引:1,他引:1
通过对龙门温泉所处地区地质构造、水文地质条件的分析,根据温泉的水文地球化学特征,从温泉的水源、热源、构造等方面阐明了龙门温泉的成因,并对温泉的热储温度、循环深度作了较为系统的论证。 相似文献
3.
4.
5.
断裂构造能够引起重力场的异常分布,温泉热源的形成和空间展布主要受深大断裂、基底构造等地质因素控制。基于这一思路,根据该区重力资料,结合地质及其它地球物理资料对深部地质结构做了一些探讨。对重力资料进行了一些处理,挖掘深部地质信息,根据所得信息推断出了一些基底断裂,有一些是本次重力结果新发现的断裂。此外,还证实了前人已圈定的断裂构造,这些构造在控热、导热作用方面起着重要作用,深大断裂、基底构造它们交汇部位附近是寻找温泉热源的有利地区。 相似文献
6.
卡辉地区出露4处温泉群,泉点达30余处。本文从该地温泉的分布、水化学特征、热源、地热地质构造和补排条件方面,分析温泉形成模式,为区内地热资源开发利用提供地质参考。 相似文献
7.
通过沃卡温泉出露特征、水化学及同位素组成调查,结合温泉发育的地质背景,研究沃卡温泉的水文地球化学特征和成因。研究表明沃卡温泉出露呈北东向带状展布,明显受断裂控制,温泉水化学类型为Cl·SO_4-Na和SO_4·HCO_3-Na型,阳离子成分为Na+为主,阴离子以Cl~-、SO_4~(2-),pH8.31~8.56,偏碱性,矿化度249.3~366.6mg/l,δD(‰)-150~-157.2,δ18O(‰)-18.3~-22,揭示温泉来源于大气降水补给,补给高程在5 000~5 300m之间。地球化学温标估算沃卡温泉热储温度155℃。泉类型主要为断裂深循环型,沃卡温泉热源主要为深循环地热增温。 相似文献
8.
9.
本文在武威西营药王泉温泉以往勘探评价的基础上,据近年获悉氦同位素资料以及对温泉所在地花岗岩侵入时代提出商榷等信息,结合邻区地热地质条对比,探讨了温泉形成的热源机制和区域地热背景,认为武威西营药王泉温泉是甘肃地热条件最好的地热田,有待进一步研究与开发。 相似文献
10.
贵州省剑河温泉形成原因浅析 总被引:1,自引:0,他引:1
地热资源形成的四个要素为热储层、热储体盖层、热流体通道及地热源,该区的地形地貌、地层结构、地质构造环境对温泉形成了一个补给、迳流、排泄的有利环境条件。 相似文献
11.
12.
13.
14.
The Gulf of Suez region is one of the most interesting geothermal areas in Egypt because of the high temperatures of its springs.The eastern and western shores of the Gulf of Suez are characterized by superficial thermal manifestations including a cluster of hot springs with varied temperatures.Variations of deuterium and oxygen-18 concentrations in thermal waters have been used to aid in describing the source of recharge in the Gulf of Suez hot springs.Isotope and geochemical data for the Gulf of Suez thermal waters suggest that recharge to the hot springs may not be entirely from the Gulf of Suez water,but possibly from the meteoric water that comes from areas of higher altitude surrounding the hot springs. 相似文献
15.
为查明色达—松潘断块地热资源赋存状态及热源来源,以四川黑水县内3处温泉(热水塘、上达古、卡龙沟)为研究对象,采集温泉水样进行水化学分析和同位素测试,研究地热水的补给来源和热储温度。研究结果显示,热水塘温泉的地下水化学类型为HCO3-Na型,上达古温泉和卡龙沟温泉的地下水化学类型为HCO3-Ca型,补给水源主要为大气降水,补给高程分别为5 121 m、3 890 m、3 921 m。结合矿物饱和指数,采用SiO2地热温标计算3处温泉的热储温度,分别为119.036 ℃、49.034 ℃、30.215 ℃。综合分析认为研究区地下热水的成因主要为大气降水经高山补给区入渗至储集层,吸取地下深部向上传导的热量和放射性元素衰变释放的热量,并与围岩发生水-岩作用形成地下热水,在断裂发育部位热水沿断裂带向上运移,最后在地表出露形成温泉。 相似文献
16.
福建省饮用天然矿泉水资源丰富,但主要为偏硅酸型,水源地遍布全省,但规模一般较小,根据我省已鉴定的饮用天然矿泉水资源的基本概况,特点进行总结,并对福建省饮用天然矿泉水资源评价中存在的若干主要问题进行探讨,同时对资源评价,开发提出了建议。 相似文献
17.
福建省地层多重划分,对比研究(续) 总被引:1,自引:0,他引:1
福建省地层多重划分、对比研究(续)李兼海,王国平,郑铁藩,梁诗经(福建省区域地质调查队,三明,365001)3晚三叠世一新第三纪印支运动后,福建地壳发生了重大变革,全境由海转变成陆地。晚三叠世一中佛罗世,除闽西南局部地区有海湾泻湖相沉积外,皆为河流一... 相似文献
18.
Abstract From the determinations of surface heat flow based on silica geothermometry, residual heat flow, radiogenic heat production of rocks, thermal conductivities of rocks and so on, the temperatures at different depths of the lithosphere in Fujian Province are estimated by using a one-dimensional steady-state model. According to these and the research on geological structures, the possibility of existence of various geothermal systems in Fujian is discussed. The authors consider that in Fujian, geothermal systems related to shallow magmatism do not exist and hot dry rock systems can not be exploited for the time being. However, intermediate- and low-temperature hydrothermal systems are well developed. They are controlled by active faults and distributed widely in southeastern Fujian, but do not have an anomalous heat source. The groundwater circulates at great depths and has a temperature usually less than 150°C with less discharge but good quality. It can be used directly as a valuable geothermal water resource but not suitable to be developed as an energy source. 相似文献
19.
Guangdong Province in Southeast China is noted for its numerous geothermal resources due to tectonic episodes, mainly occurred during the Cretaceous. The surface heat flow and geothermal gradient are the most direct ways to understand the temperature of the Earth. However, geothermal resources are poorly utilized in Guangdong Province due to limited numbers of boreholes and surficial hydrothermal fluids. To improve the understanding of underground temperature distribution in Guangdong Province, we have applied power-density spectral analysis to aeromagnetic anomaly data to calculate the depth of the Curie isothermal surface. Upward continuation is applied and tested to the magnetic data. The calculated Curie isotherm is between 18.5 km and 25 km below surface. The fluctuation in the depth range reflects lateral thermal perturbations in the Guangdong crust. In particular, the eastern, northern, western and coastline areas of the province have a relatively shallow Curie isotherm. By comparing the surface heat flow, geothermal gradient, distribution of Mesozoic granite-volcanic rocks, and natural hot springs, we conclude that during Mesozoic, magmatism exerted great influence on the deep thermal state of Guangdong Province. A shallow Curie isotherm surface, as well as numerous natural hot springs and high heat flow,show clear signatures of shallow heat sources. 相似文献