当前位置：
X-MOL 学术
›
J. Volcanol. Geotherm. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Diffuse emission and transport of gaseous elemental mercury (GEM) in the Mapamyum geothermal system, Western Tibet (China)
Journal of Volcanology and Geothermal Research ( IF 2.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.jvolgeores.2020.106825 Yutao Sun , Zhengfu Guo , Jianguo Du , Wenbin Zhao
Journal of Volcanology and Geothermal Research ( IF 2.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.jvolgeores.2020.106825 Yutao Sun , Zhengfu Guo , Jianguo Du , Wenbin Zhao
Abstract Mercury (Hg) is a widely spread pollutant, owing to its high mobility in the nature. The rising input of Hg into the atmosphere has resulted in enhanced Hg pollution in both terrestrial and aquatic ecosystems. The Tibetan plateau, which is known as the roof of the world, is considered as Hg-sensitive ecosystems. The Himalayan-Tibetan geothermal belt, which is formed due to the collision between India and Eurasia, is an important potential source of Hg to the atmosphere. However, study to the emission and transportation of geological Hg in the Tibetan Plateau is still rare. Understanding the emission and transportation in the Tibetan Plateau can provide important constraints on global Hg budget and its pollution transportation on the world. Diffusive emission and transportation of gaseous elements mercury (GEM or Hg0) in the Mapamyum geothermal system (MGF) of western Tibet was investigated by the closed-chamber method and the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) dispersion model. The estimated annual output of GEM in the MGF, calculated over an area of 41,615 m2, was in the order of 6.1 × 10−4 ton. He-C isotope ratios of the geothermal samples were all within the range of typical crustal domain. Combing the hydrothermal analysis, it might deduce the Hg0 in the MGF might derive from both deep lithosphere and the upper crust. The GEM diffused from the source region was mainly dispersed to the NW direction. The maximum concentration of GEM mainly distributed at the MGF, which is also the region with the largest deposition rate. Results from the simulated results of the HYSPLIT dispersion model, suggest that the GEM emitted from the MGF would not significantly enhance the atmospheric Hg concentration, whereas the deposition and accumulation of GEM around the source region is not negligible.
更新日期：2020-05-01
京公网安备 11010802027423号