Restriction of reactive iron to acid volatile sulfides formation in Licun estuary sediments of Jiaozhou Bay
In estuary environment, acid volatile sulfide (AVS) is usually one of the most important or reactive phases. 13 short column sediment cores were collected from Licun estuary of Jiaozhou Bay, and the acid volatile sulfides (AVS) of sediment samples were extracted by cold diffusion method and analyzed. The grain size, reactive iron contents, and organic carbon contents of sediment samples were also analyzed in part cores. The AVS contents of sediment vary in a large range as 0.4～198.4 μmol/g, with an average value of 28.1 μmol/g. Reactive iron contents range from 25.52 μmol/g to 169.26 μmol/g, with an average value of 91.22 μmol/g. Organic carbon contents are 0.4～198.4 μmol/g, with an average value of 28.1 μmol/g. Characters of high AVS, organic carbon content, and reactive iron content are obvious in three cores which close with the Licun River. And the AVS have good relationships with reactive iron content either in single core or between cores. So, the formation of AVS in the sediments is controlled by the availability of reactive iron in area near the Licun River where organic carbon is supplied from river and its content is abundant. The bottom water is in a reductive environment at this area. In the area which has a little distance with the Licun River, the supply of organic carbon and the changing of environment redox state become the controlling factor of AVS formation in the sediments since the organic carbon supply lessens from the Licun River. The geochemistry character of sediment in the estuary area is influenced remarkably by the material inputted form river.
Jiaozhou Bay Licun Estuary Acid volatile sulfides Reactive iron Organic carbon
Xiaoqiang Pu Huiling Zhang Xiaowan Tao Xiaoqiang Pu Shaojun Zhong Fei Liu
Guangdong Ocean University GOU Zhanjiang,China Research Institute of Petroleum Exploration & Development PetroChina Beijing,China CAS Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry KLMSG Guangzhou,China Qingdao Institute of Marine Geology QIMG Qingdao,China North China Sea Branch of the State Oceanic Administration NCSB Qingdao,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）