目前尚不完全了解泰国湾和泰国南部安达曼海沿岸盐碱地热田的水文地质环境和天然放射性核素。在苏拉特他尼省(泰国南部的东海岸)发现了六个盐碱地温泉;SR2,SR3和SR7站点;甲米省(泰国南部的西海岸);KB2,KB3和KB4站点。基于总溶解固体含量,我们将盐渍地热弹簧分为三类:a)稍微盐渍地热弹簧只有SR7(1828毫克/升),b)中盐地热弹簧由SR2(10,196mg/L)和KB3(3448mg/L)组成,和c)含SR3(11,856毫克/升)的盐碱地热弹簧,KB2(17,014mg/L)和KB4(18,070mg/L)。含盐地热地下水中的主要离子随着距海岸线的距离而呈下降趋势。与全球大气水位线和局部大气水位线相比,相对于VSMOW绘制的稳定同位素特征(δ18O和δ2H)可能是气象来源的,并受到海水/微咸水的影响。然而,SR7和KB3位点表明同位素特征主要由雨水补给。重要的是,Na-K-Ca-Mg地温度计可以合理地估计五个盐水地热弹簧的储层温度在120°C(KB3)至169°C(SR2)的范围内。而SR7,提出的二氧化硅-石英地温度计约为115°C。然而,二氧化硅-玉髓和其他阳离子地温仪无法估计合适的储层温度。另一方面,通过RAD7-H2O评估了泰国湾和安达曼海沿岸盐碱地热地下水中的氡浓度,从18.64±0.96kBq/m3(KB2;安达曼海一侧)到8507.48±1.06kBq/m3(SR7;泰国湾一侧)不等。氡活动与盐水入侵的比较表明,泰国湾一侧的含盐地热地下水水平高于安达曼海一侧。第四纪沉积物的沉积以及大量富含氡的盐水流入,是由于与泰国湾花岗岩山脉风化有关的非海洋和沿海沉积物中的铀衰变所致。地热地下水中的氡浓度受当地地质环境和沿海沉积物的影响很大。
Hydrogeological settings and natural radionuclides of saline geothermal fields along the coastlines of the Gulf of Thailand and Andaman Sea in Southern Thailand are currently not fully understood. Six saline geothermal springs have been discovered in Surat Thani Province (Southern Thailand\'s east coast); SR2, SR3, and SR7 sites; Krabi Province (Southern Thailand\'s west coast); KB2, KB3, and KB4 sites. Based on total dissolved solid contents, we divided the saline geothermal springs into three categories: a) slightly saline geothermal spring had only SR7 (1828 mg/L), b) moderately saline geothermal spring consisted of SR2 (10,196 mg/L) and KB3 (3448 mg/L), and c) very saline geothermal spring comprised SR3 (11,856 mg/L), KB2 (17,014 mg/L) and KB4 (18,070 mg/L). The major ions in the saline geothermal groundwater represent decreasing trends with the distance from the coastline. Stable isotope signatures (δ18O and δ2H) relative to the VSMOW plotted in comparison with the global meteoric water line and local meteoric water line are presumably of meteoric origin and influenced by seawater/brackish water. However, the SR7 and KB3 sites indicated that the isotopic signatures were mainly recharged by rainwater. Significantly, the Na-K-Ca-Mg geothermometer can reasonably estimate the reservoir temperatures for the five saline geothermal springs to be in the range of 120 °C (KB3) to 169 °C (SR2). While the SR7, the silica-quartz geothermometer is proposed of approximately 115 °C. However, the silica-chalcedony and other cation geothermometers fail to estimate suitable reservoir temperatures. On the other hand, the radon concentrations in the saline geothermal groundwater along the Gulf of Thailand and Andaman Sea were assessed by RAD7-H2O, which varied from 18.64 ± 0.96 kBq/m3 (KB2; Andaman Sea side) to 8507.48 ± 1.06 kBq/m3 (SR7; Gulf of Thailand side). A comparison of radon activity with the saltwater intrusion showed that the saline geothermal groundwater on the Gulf of Thailand side had higher levels than that at the Andaman Sea side. The deposition of Quaternary sediments combined with significant saltwater inflow enriched with radon resulted from the decay of uranium from both non-marine and coastal deposits related to granitic mountain weathering along the Gulf of Thailand. Radon concentrations in the geothermal groundwater were highly influenced by the local geological environment and coastal sediments.