Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux

Hao，Yinlei1,2; Gong，Qinghua1,2; Kuang，Xingxing3; Feng，Yuqing4; Zhou，Hui3; Zheng，Chunmiao3,5

2024-02-01

10.1029/2023GC011297

Geochemistry, Geophysics, Geosystems   影响因子和分区

1525-2027

Mantle-derived volatile degassing lacks quantitative evaluation in continental regions without active magmatism, such as the Tibetan Plateau. Ten new gas abundance and helium isotope data points combined with 286 hydrothermal volatile literature data points in India–Asia continental collision settings demonstrate widespread mantle-derived volatiles across the thick (∼70 km) crust. The mantle-derived He is best explained by direct mantle volatile input from subcontinental lithospheric mantle (1%–36.5%) or the asthenospheric wedge (1%–27.8%) instead of fossil residual magmatic fluids or Quaternary mantle-derived melt intrusion into crustal depth. Mantle-derived He is transported from the deep mantle to the surface at an upflow rate of 30–11,700 mm/year based on a newly developed steady-state one-dimensional flow model, corresponding to a mantle-derived He flux of 17 to 1.5 × 10 atoms m s (81.7%–99.4% of the total He flux) and a mantle-derived He flux from 2.0 × 10 to 1.8 × 10 atoms m s (1.4%–36.5% of the total He flux). The mantle-derived helium fluxes in the study area are comparable to those of other nonvolcanic hydrothermal systems in the tectonically active regions but lower than those of volcanic fields. The helium transit time ranges from 5.3 ka to 2.3 Ma, indicating that the spatial pattern of He/He ratios in the India-Asia continental collision settings can provide a snapshot of the state of the Indian mantle lithosphere between those revealed by potassic-rich mafic rocks (25–8 Ma) and seismic methods (present).

helium flux helium isotopes hydrothermal systems India-Asia continental collision lithospheric structures

SCI ; EI

英语

其他

GEOSCIENCES

2-s2.0-85184840802

Scopus

1.Guangdong Open Laboratory of Geospatial Information Technology and Application,Guangzhou Institute of Geography,Guangdong Academy of Sciences,Guangzhou,China
2.Guangdong Geological Disaster Emergency Technology Research Center,Guangzhou,China
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
4.Hebei Center for Ecological and Environmental Geology Research,Hebei GEO University,Shijiazhuang,China
5.Eastern Institute for Advanced Study,Eastern Institute of Technology,Ningbo,China

Hao，Yinlei,Gong，Qinghua,Kuang，Xingxing,et al. Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux[J]. Geochemistry, Geophysics, Geosystems,2024,25(2).

Hao，Yinlei,Gong，Qinghua,Kuang，Xingxing,Feng，Yuqing,Zhou，Hui,&Zheng，Chunmiao.(2024).Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux.Geochemistry, Geophysics, Geosystems,25(2).

Hao，Yinlei,et al."Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux".Geochemistry, Geophysics, Geosystems 25.2(2024).