地质通报2018，Vol.37Issue(2)：487-495,9.
对关中盆地腹部深层地下热水δ18O富集主控因素的再认识
摘要
Abstract
The research on the origin of deep geothermal water in Guanzhong Basin has a great significance for promoting the sus-tainable development and utilization of geothermal water. Deep geothermal water, which is circulating geothermal water, is inti-mately related to modern circulating water in most regions of China, About this phenomenon, experts both in China and abroad have different opinions concerning the main factors for the enrichment of the δ18O in the deep geothermal water in Guanzhong Ba-sin. In this paper, the authors combined tectonic evolution and isotope geochemistry approaches to explore the main factors for the enrichment of δ18O in different deep tectonic units in Guanzhong Basin.The results show the factors are diverse,because of the dif-ference of thermal storage circumstance exploitation level, and the main factor is the water-rock interaction under relatively closed geothermal reservoir condition. The underground water evaporation experiments show that, before the geothermal water as the source pours into the geothermal reservoir, there usually occurs some degrees of evaporation. When the supplied water comes into the geothermal reservoir,the enrichment of δ18O has been affected by water-rock reaction,and the influence degree of water-rock interaction in different tectonic units is in order of Gushi depression > the east of Xianli terrace > Xi'an depression and the west of Xianli terrace.关键词
关中盆地/地下热水/δ18O富集/水岩反应/蒸发作用Key words
Guanzhong Basin/geothermal water/enrichment of δ18O/water-rock reaction/evaporation分类
天文与地球科学引用本文复制引用
马致远,吴敏,郑会菊,许勇,孟阳,党书生..对关中盆地腹部深层地下热水δ18O富集主控因素的再认识[J].地质通报,2018,37(2):487-495,9.基金项目
国家自然科学基金项目《沉积盆地深层孔隙型地下热水回灌堵塞机理研究》(批准号:41472221)和《同位素演化对具地压特征的地下起源成因的指示意义》(批准号:41172211) （批准号:41472221）
