Shangguan, Z. G. (1999) The research of modern He discharge in volcanic and tectonically active areas of China's continent. Il nuovo cimento C, 22 C (3-4). pp. 263-268. ISSN 1826-9885
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Abstract
The releasing features of modern helium in volcanic and tectonically active areas of China’s continent are here discussed, presenting that the current escaped He in volcanic areas are mainly the mantle-derived He. The 3HeO4He ratios of these He are gradually lowered during the ascent of deep-seated He towards the surface due to the strong diffusion and migmatization of the air. There is little mantle-derived He in the escaped gases from the hot springs distributed along the active tectonic belts, these gases are mostly derived from the crust The 3HeO4He ratios of the crustal gases (including natural gas) in Eastern China are relatively higher than those gases in Middle-Western China. It is difficult to interpret this phenomenon by means of the differences of tectonic activity in those areas. We consider that the main reason of this occurrence may be related to the variation of the crustal thickness of China’s continent from East to West.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Isotopic composition chemistry; structure of the crust and upper mantle; conference proceedings |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra |
| Depositing User: | Marina Spanti |
| Date Deposited: | 18 Sep 2018 14:52 |
| Last Modified: | 18 Sep 2018 14:52 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/13243 |
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