Anaerobic oxidation of methane: geochemical evidence from pore-water in coastal sediments of qi'ao island (pearl river estuary), southern china
文献类型：期刊论文
| 作者 | Wu Zijun; Zhou Huaiyang; Peng Xiaotong; Chen Guangqian |
| 刊名 | Chinese science bulletin
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 51期号:16页码:2006-2015 |
| 关键词 | Anaerobic oxidation of methane (aom) Sulfate-reducing Sediments Pearl river estuary |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-006-2064-6 |
| 通讯作者 | Zhou huaiyang(zhouhy@gig.ac.cn) |
| 英文摘要 | The concentrations of ch(4) and so(4)(2-) inpore-water and the carbon isotope compositions of total dissolved inorganic (y-co(2)) and ch(4) were determined for three coastal sedimentary cores collected from qi'ao island (pearl river estuary), southern china. results show that methane concentration changes dramatically at the base of the sulfate-reducing zone and sulfate concentration gradients are linear for all stations. in addition, the carbon isotope of methane becomes heavier at the sulfate-methane transition (smt), which causes sigma co(2)-delta(13)c to become the minimum. the geochemical profiles of pore-water render indirect evidence for anaerobic oxidation of methane (aom). based on numerical modeling of aom and sulfate-reducing rates, the portion of total sulfate reduction occurring via aom is 9.0%, 84% and 45.5%, respectively, and the percentage of sigma co(2)added to the pore-water is 4.7%, 72.4% and 29.45% correspondingly for three sites. furthermore, it is found that the methane concentration, methane diffusive flux and the depth of smt are controlled by the quantity and quality of sedimentary organic matter incorporated into the sediments. the great amount of organic material is favorable for rapid depletion of sulfate via sedimentary organic matter degradation, and on the other hand, causes the increase of the methane flux in the smt which results in a portion of sulfate reduction supported by aom. accordingly, the smt was shifted towards the sediment surface. |
| WOS关键词 | COUPLED SULFATE REDUCTION ; MARINE-SEDIMENTS ; ORGANIC-MATTER ; SAANICH INLET ; SEA SEDIMENTS ; ACETATE ; RATES ; CONSORTIUM ; PROFILES ; MODEL |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000241849100014 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379828 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhou Huaiyang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Zijun,Zhou Huaiyang,Peng Xiaotong,et al. Anaerobic oxidation of methane: geochemical evidence from pore-water in coastal sediments of qi'ao island (pearl river estuary), southern china[J]. Chinese science bulletin,2006,51(16):2006-2015. |
| APA | Wu Zijun,Zhou Huaiyang,Peng Xiaotong,&Chen Guangqian.(2006).Anaerobic oxidation of methane: geochemical evidence from pore-water in coastal sediments of qi'ao island (pearl river estuary), southern china.Chinese science bulletin,51(16),2006-2015. |
| MLA | Wu Zijun,et al."Anaerobic oxidation of methane: geochemical evidence from pore-water in coastal sediments of qi'ao island (pearl river estuary), southern china".Chinese science bulletin 51.16(2006):2006-2015. |
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来源：中国科学院大学
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