Hydrothermal He and CO2 at Wudalianchi intra-plate volcano, NE China

Xu, S., Zheng, G., Nakai, S.’i., Wakita, H., Wang, X. and Guo, Z. (2013) Hydrothermal He and CO2 at Wudalianchi intra-plate volcano, NE China. Journal of Asian Earth Sciences, 62, pp. 526-530. (doi: 10.1016/j.jseaes.2012.11.001)

Abstract

Chemical and isotopic compositions have been measured for CO2-rich bubbling gases discharging from cold springs in Wudalianchi intra-plate volcanic area, NE China. Observed 3He/4He ratios (2-3RA) and δ13C values of CO2 (-5‰ to -3‰) indicate the occurrence of a mantle component released and transferred to the surface by the Cenozoic extension-related magmatic activities. The CO2/3He ratios are in wide range of (0.4-97×109). Based on the apparent mixing trend in a 3He/4He and δ13C of CO2 diagram from all published data, the extracted magmatic end-member in the Wudalianchi Volcano has 3He/4He, δ13C and CO2/3He value of ∼3.2RA, ∼-4.6‰ and ∼6×1010, respectively. These values suggest that the volatiles originate from the sub-continental lithospheric mantle (SCLM) in NE China and represent ancient fluids captured by prior metasomatic events, as revealed by geothermal He and CO2 from the adjacent Changbaishan volcanic area.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Xu, Dr Sheng
• Authors: Xu, S., Zheng, G., Nakai, S.’i., Wakita, H., Wang, X., and Guo, Z.
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Journal of Asian Earth Sciences
• Publisher: Elsevier Ltd.
• ISSN: 13679120
• ISSN (Online): 1878-5786