Carbon dioxide emissions from Tengchong Cenozoic volcanic field, Yunnan Province, SW China
文献类型：期刊论文
| 作者 | Cheng ZhiHui; Guo ZhengFu; Zhang MaoLiang; Zhang LiHong |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2014-12-01 |
| 卷号 | 30期号:12页码:3657-3670 |
| ISSN号 | 1000-0569 |
| 关键词 | Soil degassing Hot springs CO2 Flux Origin Tengchong |
| 文献子类 | Article |
| 英文摘要 | Recent researches have indicated that, beside volcanic eruption periods, dormant periods between the volcanic activities can emit a large amount of CO2 from the solid earth into atmosphere. In quiescent volcanoes, CO2 is released not only from fumaroles and hot springs but also from well-defined areas on the flanks and at the base of volcanoes, which has been called soil gases. Tengchong is one of the most important Cenozoic active volcanic fields, and a strong geothermal activity area in Southeast Tibet, while researches on flux of CO2 in Tengchong are poorly reported. During 2012 similar to 2013, using closed-chamber method widely applied abroad, soil CO2 flux surveys were performed on Mazhan, Daying mountain, Rehai-Huangguaqing, Wuhe-Puchuan-Tuantian and Banglazhang. measurements performed in Mazhan, Rehai-Huangguaqing and Wuhe-Puchuan-Tuantian are very high and show a wide range of values up to 6981.9gm(-2)d(-1) and the average soil CO2 flux are 874.5gm(-2)d(-1), 42.5gm(-2)d(-1) and 25.1gm(-2)d(-1) respectively. In order to elucidate its origin, gas samples of measured spots with high-CO2 flux were collected for compositional and isotopic analysis, and gases from hot springs nearby were also collected for comparison. Combined with the component and isotopic data of hot spring gases previously reported, we find a large range of He-3/He-4 ratios, 0.22 similar to 5.92Ra. Mazhan-Qushi, Rehai-Huangguaqing and Wuhe-Puchuan-Tuantian present higher He-3/He-4 ratios and reveal their mantle origin. delta C-13(CO2) and CO2/(3) He modeling indicates that CO2 may result from decarbonation of country rock and addition of carbon from mantle. Moreover, areas with high CO2 flux are consistent with the distribution of previously deduced magma chambers. The magma chambers are considered to be the major source of heat for decarbonation and a source of He and CO2. The total soil CO2 flux of Mazhan-Qushi, Tengchong-Rehai and Wuhe-Puchuan-Tuantian are estimated to be 1.8 x 10(6)t/a, 3.2 x 10(6)t/a and 2.0 x 10(6)t/a respectively. The total soil CO2 flux of Tengchong is about 7.0 x 10(6)t/a, which is as large as a half of that from Etna's summit carters. We also calculated the flux of excess carbon from spring water by near-surface rock-water interaction (4.9 x 10(4)t/a). It turns out that the springs in Tengchong have the potential to discharge 5.3 x 10(4)t CO2 per year to the atmosphere through bubbles and water, which is much larger than that from hot springs in Vulcano, Italy. |
| WOS关键词 | SOIL-GAS ; CO2 FLUX ; MAMMOTH MOUNTAIN ; MAGMA CHAMBERS ; LOWER CRUST ; HELIUM ; AREA ; ISOTOPE ; JAPAN ; ETNA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000347270400015 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86418]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cheng ZhiHui |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng ZhiHui,Guo ZhengFu,Zhang MaoLiang,et al. Carbon dioxide emissions from Tengchong Cenozoic volcanic field, Yunnan Province, SW China[J]. ACTA PETROLOGICA SINICA,2014,30(12):3657-3670. |
| APA | Cheng ZhiHui,Guo ZhengFu,Zhang MaoLiang,&Zhang LiHong.(2014).Carbon dioxide emissions from Tengchong Cenozoic volcanic field, Yunnan Province, SW China.ACTA PETROLOGICA SINICA,30(12),3657-3670. |
| MLA | Cheng ZhiHui,et al."Carbon dioxide emissions from Tengchong Cenozoic volcanic field, Yunnan Province, SW China".ACTA PETROLOGICA SINICA 30.12(2014):3657-3670. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。