Submarine groundwater discharge at an active margin: NE Taiwan coast
| Autor: | Gattacceca, Julie, Hovius, Niels, West, A.J., Galy, Albert, Hammond, Douglas, Kao, Shuh-Ji, Liu, J.T. |
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| Přispěvatelé: | Department of Earth Sciences [Cambridge, UK], University of Cambridge [UK] ( CAM ), Academia Sinica, National Sun Yat-sen University, University of Cambridge [UK] (CAM), National Sun Yat-Sen University (NSYSU), Gattacceca, Julie Claire |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Taiwan
Radium isotopes [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [ SDU.STU ] Sciences of the Universe [physics]/Earth Sciences Hydrology/hydrogeology [ SDU.STU.GC ] Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces environment Continental Hydrosystems Continental and marine environments Fluxes estimation [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry Submarine groundwater discharge SGD [SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.STU] Sciences of the Universe [physics]/Earth Sciences [ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [ SDU.STU.HY ] Sciences of the Universe [physics]/Earth Sciences/Hydrology |
| Zdroj: | Mineralogical Magazine 22nd Goldschmidt Conference, 2012 22nd Goldschmidt Conference, 2012, Jun 2012, Montreal, Canada. Mineralogical Magazine, 76 (6), pp.1743, 2012, G Goldschmidt Abstracts 2012 22nd Goldschmidt Conference, 2012, Jun 2012, Montreal, Canada. pp.1743 |
| Popis: | International audience; Studies of submarine groundwater discharge (SGD) have been focused on passive margins with large floodplains [1]. SGD from active margins without substantial sediment cover remains unknown, but it is in the rapidly eroding highlands along these margins that the feedback between climate and weathering is most effective [2].In Taiwan, measured erosion and silicate weathering rates are amongst the highest in the world. In a representative section of the northeast coast of Taiwan, at the outlet of the Liwu river, we have explored the possible magnitude and pattern of SGD, and its implications for weathering budgets. The river drains 4 km of emergent mountain relief, with a further 5 km of submarine relief above the Pacific abyssal plain. In the Liwu catchment, 16±1% of the river discharge (averaged over 37 years of record) comes from a deep groundwater reservoir, and deep seated chemical weathering of silicates accounts for 38% of the riverine silicate weathering flux [3]. It is likely that the large inland hydraulic head drives submarine discharge from this deep groundwater reservoir and weathering reactor.We have used the radium quartet (228Ra, 226Ra, 224Ra, 223Ra) along with Temperature-Salinity (T-S) profiles on two 50 km West- East marine transects off the NE coast of Taiwan ( |
| Databáze: | OpenAIRE |
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