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| 1 | Characteristics of authigenic pyrite and its sulfur isotopes influenced by methane seep at Core A, Site 79 of the middle Okinawa Trough显示文摘The anaerobic oxidation of methane(AOM) has strongly developed at Core A, Site 79 of the middle Okinawa Trough, East China Sea, and a large amount of authigenic pyrite is preserved in the surface sediment. In this study, we analyze the characteristics of the authigenic pyrite and its sulfur isotopic values. The authigenic pyrite is stripy and tubular, and there were foraminifera compartments filled with pyrite. The pyrite is extracted using chromium reduction, and the values of ? 34 S are found to lie between ?41.20‰ and 8.92‰ V-CDT. The bulk pyrite tends to be more enriched in 34 S with increasing depth. Particularly, the ? 34 S value of the pyrite lies between ?32.73‰ and ?41.20‰ V-CDT above 278 cmbsf, but it quickly increases below this depth(?21.49‰–8.92‰ V-CDT). At the same time, the total sulfur content of the pyrite shows an abrupt increase above 100 cmbsf but is otherwise stable between 1.04% and 0.55% below 100 cmbsf. The stable and negative values of ? 34 S and the decreasing values of total sulfur above 278 cmbsf indicate reduced AOM activities in 17.18–5.3 ka. In addition, the increasing ? 34 S and pyrite content indicate strong AOM development and methane seep below 278 cmbsf in 18.8–17.18 ka. In particular, the highest positive value of ? 34 S occurring in 18.78 ka indicates the most intense AOM activity. The shallow sulfate-methane interface(SMI) and high methane flux below marine sediments also strongly support this activity. | WANG Meng CAI Feng LI Qing LIANG Jie YAN GuiJing DONG Gang WANG Feng SHAO HeBin HU GaoWei | 2015 | Science China Earth Sciences2015，58，12： | 4 |
| 2 | Geochemical constraints on the methane seep activity in western slope of the middle Okinawa Trough, the East China Sea显示文摘Anaerobic oxidation of methane and sulfate reduction was studied in the pore waters of four cores at two stations of the middle Okinawa Trough. Pore water vertical distributions of sulfate, methane, sulfide, total alkalinity, ammonium, and phosphate were determined in this study. Our results show strong linear sulfate concentration gradients of 6.83 mmol/L m?1 in Core A and 5.96 mmol/L m?1 in Core C, which were collected from two stations. Concurrent variations of methane, total alkalinity and hydrogen sulfide all exhibit steep increases with depth at both cores, which indicate active methane seep activities around two stations. Pore water ammonium and phosphate concentrations reveal minor influences of organic matter degradation on sulfate reduction at two stations. Sulfate methane interface(SMI) was extrapolated from linear sulfate profiles in methane seep cores. Shallower SMI depths(A: 4.9 mbsf; C: 5.4 mbsf) indicate strong methane fluxes and active anaerobic oxidation of methane in the underlying sediments. | LI Qing CAI Feng LIANG Jie SHAO HeBin DONG Gang WANG Feng YANG ChuanSheng HU GaoWei | 2015 | Science China Earth Sciences2015，58，6： | 3 |
| 3 | Widespread Methane Seep Activities along the Western Slope of the Okinawa Trough, East China Sea显示文摘Objective The western slope of the Okinawa trough has been considered to experience important methane seep activities.Abundant terrigenous sediments supply and widely developed normal faults make this area an ideal place for methane production,methane fluids migration and associated anaerobic oxidation of methane.However,few studies have been performed to reveal the methane seep activities via pore water geochemical studies in this area.In this study,we present comprehensive | LI Qing CAI Feng YAN Guijing LIANG Jie SHAO Hebin WANG Meng DONG Gang WANG Feng SUN Yunbao LUO Di | 2017 | Acta Geologica Sinica(English Edition)2017，91，4： | 2 |
| 4 | Characteristics of Authigenic Pyrite and its Sulfur Isotopes Influenced by Methane Seep--Taking the Core A at Site 79 of the Middle Okinawa Trough as an Example显示文摘Objective Authigenic pyrite often develops extensively in marine sediments,which is an important product of sulfate reduction in an anoxic environment.It has a specific appearance and complicated sulfur isotopic properties,and acts as important evidence of methane seep in marine sediments.Strong AOM(anaerobic oxidation of methane) | WANG Meng LI Qing CAI Feng LIANG Jie YAN Guijing DONG Gang WANG Feng SHAO Hebin LUO Di CAO Yimin | 2017 | Acta Geologica Sinica(English Edition)2017，91，1： | 1 |
| 5 | Occurrence and Removal of Antibiotic Resistance in Nationwide Hospital Wastewater Deciphered by Metagenomics Approach-China,2018-2022显示文摘Summary What is already known about this topic?Hospital wastewater represents a significant conduit for the dissemination of antibiotic resistance genes(ARGs),including those that are of clinical importance.Yet,the variation in antibiotic resistance on a national level,which can be influenced by regional differences,has not been thoroughly elucidated. | Jin Huang Zhongyu Wang Zihan Chen Hebin Liang Xiaoyan Li Bing Li | 2023 | China CDC weekly2023，5，46： | 0 |
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