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Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan ArchiMer
Chen, Nai-chen; Yang, Tsanyao Frank; Hong, Wei-li; Chen, Hsuan-wen; Chen, Hsiao-chi; Hu, Ching-yi; Huang, Yu-chun; Lin, Saulwood; Lin, Li-hung; Su, Chih-chieh; Liao, Wei-zhi; Sun, Chih-hsien; Wang, Pei-ling; Yang, Tao; Jiang, Shao-yong; Liu, Char-shine; Wang, Yunshuen; Chung, San-hsiung.
To systematically quantify the production, consumption and migration of methane along a continental margin, 210 sediment cores were collected from offshore southwestern Taiwan and analyzed for their gas and aqueous geochemistry. These data, combined with published results, were used to calculate the diffusive methane fluxes across different geochemical transitions and to develop scenarios of mass balance to constrain deep microbial and thermogenic methane production rates within the accretionary prism. The results showed that methane diffusive fluxes ranged from 2.71 × 10−3 to 2.78 × 10−1 and from ‒1.88 × 10−1 to 3.97 mmol m−2 d−1 at the sulfate-methane-transition-zone (SMTZ) and sediment-seawater interfaces, respectively. High methane fluxes tend to be...
Tipo: Text Palavras-chave: Thermal maturation; Methanogenesis; Anaerobic methanotrophy; Methane efflux; Subduction; Taiwan.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00393/50412/51132.pdf
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