Spatiotemporal characteristics of hydrothermal volatiles from the Tengchong volcanic field in the southeastern Tibetan Plateau: A probable constraint on the genesis of intraplate volcanism
Year: 2024
Type: article
Abstract: Determining parent magmatic sources of active and dormant volcanoes is crucial for understanding their formation and geodynamic processes. The Tengchong volcanic field (TCV), an intraplate volcanic group located in the southeastern part of the Qinghai–Tibet Plateau, is linked to mantle disturbances through the eastward subduction of the Indian plate. By comprehensive analysis helium and carbon isotopes in hot springs in the TCV, this study revealed that volatile degassing within the TCV predominantly originated from the mantle. Volatile degassing history, coupled with a helium magma aging model, corroborated that the helium of the parent magma was similar to that found in oceanic island basalts , probable sourced from stagnant oceanic slab dehydration above the mantle transition zone, firstly providing compelling geochemical evidence for the upwelling of profound mantle materials. This research not only elucidates the enigmatic geothermal behaviors of intraplate volcanoes but also enhances our understanding of the tectonic dynamics of SE Tibetan Plateau.
Institutions: Chengdu University of Technology, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Earthquake Forecasting, China Earthquake Administration, China Earthquake Administration, China University of Geosciences (Beijing), Chinese Academy of Sciences, Northwest Institute of Eco-Environment and Resources
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,240
Funders: National Natural Science Foundation of China, National Key Research and Development Program of China, National Key Research and Development Program of China Stem Cell and Translational Research, Central Public-interest Scientific Institution Basal Research Fund, Chinese Academy of Fishery Sciences, International Geoscience and Geoparks Programme
OpenAlex ID: W4404515700