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| DOI | 10.1029/2023GC011297 |
| Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux | |
| 发表日期 | 2024 |
| EISSN | 1525-2027 |
| 起始页码 | 25 |
| 结束页码 | 2 |
| 卷号 | 25期号:2 |
| 英文摘要 | 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 (similar to 70 km) crust. The mantle-derived 3He 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 3He 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 3He flux of 17 to 1.5 x 107 atoms m-2 s-1 (81.7%-99.4% of the total 3He flux) and a mantle-derived 4He flux from 2.0 x 106 to 1.8 x 1012 atoms m-2 s-1 (1.4%-36.5% of the total 4He 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 3He/4He 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). 3He is derived directly from mantle depths instead of residual magmatic fluids or Quaternary mantle-derived melt in the shallow crust The vertical flow rate, flux and transit time of mantle-derived 3He were systematically calculated The state of the Indian mantle lithosphere revealed by mantle-derived 3He is between that revealed using petrologic and seismic methods |
| 英文关键词 | India-Asia continental collision; helium isotopes; hydrothermal systems; helium flux; lithospheric structures |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:001159653700001 |
| 来源期刊 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/305720 |
| 作者单位 | Guangdong Academy of Sciences; Guangzhou Institute of Geography, Guangdong Academy of Sciences; Southern University of Science & Technology; Hebei GEO University |
| 推荐引用方式 GB/T 7714 | . Degassing of Mantle-Derived Helium From Hot Springs Along the India-Asia Continental Collision Settings: Origins, Migration Velocity and Flux[J],2024,25(2). |
| APA | (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). |
| MLA | "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). |
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