上海国土资源2025，Vol.46Issue(3)：43-52,10.DOI:10.3969/j.issn.2095-1329.2025.03.007
海南地幔柱的资源环境效应
Resource and environmental effects of the Hainan mantle plume:a case study of geothermal anomalies and basalt carbon sequestration
摘要
Abstract
The Hainan mantle plume has been increasingly substantiated by geophysical and geochemical data.In addition to driving large-scale magmatic activity,the Hainan mantle plume has significant implications for resource and environmental effects closely related to carbon neutrality.These effects are primarily manifested in the form of geothermal clean energy contributing to carbon reduction,as well as natural and engineered carbon sequestration through basalt carbonation.This paper's research shows that:(1)The extensive magmatic activity triggered by the Hainan mantle plume has maintained a relatively high geothermal background in the Leiqiong volcanic region.The combination of basalt and suitable geological structures has led to the formation of pronounced geothermal anomalies in the Fushan sag within the basalt distribution area and beneath the sedimentary rocks,making it a favorable target for dry hot rock exploration.Successful drilling of two dry hot rock wells has been achieved at approximately 5000 m depth(Huadong 1R well reaching a temperature of 185℃at 4387 m depth;Fushen-1 well reaching a temperature of 188.71℃at 5200 m depth).(2)The activity of the Hainan mantle plume has resulted in the formation of extensive basaltic formations in the northern Hainan region,with occurrence characteristics similar to the Columbia basalt of the Wallula project in the United States.The basalt is rich in calcium,magnesium,and iron,and has relatively well-developed porosity.Preliminary estimates suggest that the theoretical capacity for CO2 mineral sequestration in the northern Hainan region ranges from 2.0 to 48.5 Gt,indicating significant potential for CO2 mineral storage.(3)Favorable basaltic geological conditions not only make it possible for the Leiqiong region to take the lead in establishing the first in-situ basalt CO2 mineral sequestration project in China,but also hold promise for the development of a low-carbon industrial chain centered on carbon sequestration,while simultaneously producing high value-added products such as soluble potash and hydrogen.关键词
海南地幔柱/资源环境效应/玄武岩/地热异常/碳封存Key words
Hainan mantle plume/resource and environmental effects/basalt/geothermal anomaly/carbon sequestration分类
地球科学引用本文复制引用
李宗祎,何庆成,张保建..海南地幔柱的资源环境效应[J].上海国土资源,2025,46(3):43-52,10.基金项目
国家自然科学基金项目(U2244215) （U2244215）
中国地质调查局地质调查项目(DD20230119,DD20230700802) （DD20230119,DD20230700802）
