| 浙江武义盆地地热水同位素地球化学研究 |
| 点此下载全文 |
| 引用本文：徐步台,章秋芳,周树根.1999.浙江武义盆地地热水同位素地球化学研究[J].地球学报,20(4):357-362. |
| DOI： |
| 摘要点击次数: 2335 |
| 全文下载次数: 2211 |
|
| 基金项目:国土资源部同位素地质研究开放实验室基金 |
|
| 中文摘要:武义盆地位于浙江中部,其中有一个长约25km 、宽约5km 的地热田。为了评估热能潜力和开发前景,本文对该地热田进行了水化学和同位素示踪研究。根据地热水的水化学分析,应用SiO2 和Na/K 地球化学温标估算出热储温度大致为80 ～110 ℃,热储深度大致为900 ～1200m 。这组资料与该地热田中Sr 和S同位素示踪所得结果相一致。H、O 同位素示踪及T( 氚) 同位素测年表明,地热水的来源与现代大气降水有关,但不是区内当地的地表水,而是该地热田外围较高山区( 相对高程> 300m) 的大气降水。它们沿着断裂带渗流至地下深部,并因地热增温和循环补给成为热水。 |
| 中文关键词:地热水 同位素地球化学 浙江武义 |
| |
| Isotopic Geochemistry of Geothermal Water in Wuyi Basin,Zhejiang Province |
|
|
| Abstract:Wuyi basin is located in central Zhejiang Province, in which there is a geothermal field about 25 km in length and 5 km in width. In order to assess the heat energy potentials and the exploitation prospects, this paper has studied hydrochemistry and isotopic trace of the geothermal field. From the hydrochemical analyses of geothermal water, the temperatures and the depths of the geothermal reservoir are estimated at about 80～110℃ and 900～1200 m respectively by means of SiO 2 and Na/K geothermometers. They are in agreement with the results obtained from the strontium and sulfur traces in the geothermal field. The hydrogen and oxygen isotopic traces and the tritium isotopic dating show that the source of geothermal water is related to the present meteoric water. However, it is derived from the meteoric water in the higher hill area (relative altitude>300m) near the geothermal field rather than from the surface water in the local area. The meteoric water permeates along the fracture zone into the depth, and becomes heat water due to the geothermal gradient and the circulated supply. |
| keywords:geothermal water isotopic geochemistry Wuyi basin of Zhejiang Province |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
