关键词: 琼北火山区, 地下流体, 地球化学, 火山喷发危险性评估

Abstract:

The results of detailed investigation on the chemical and isotopic compositions of subsurface fluids in Northern Hainan Quaternary volcanic region indicate that the Maanling and Leihuling volcanoes would be the dormant volcanoes, and great attention should be continuously paid to them. Near the Maanling crater the sodium content of underground water is anomalously higher, and also the releasing activity of deep-seated CO 2 is visible. Moreover, the determined results of hydrogen and oxygen isotopic compo

Key words: Northern Hainan volcanic region, subsurface fluid, geochemistry, volcanic hazard assessment