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Magnesium isotopes of chlorite-rich hydrothermal sediments in the Okinawa Trough and indications for Mg cycle

Science China Earth Sciences 2023年第3期66卷 648-662页

作者： hebin shao Shouye YANG Aiguo DONG Zhongya HU Key Laboratory for Polar Science of the State Oceanic Administration Polar Research Institute of ChinaShanghai 200136China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Institute of Earth Sciences China University of Geosciences(Beijing)Beijing 100083China

Seafloor hydrothermal systems play a significant role in the oceanic Mg cycle due to ubiquitous deposits of secondary Mg-rich clays during the strong fluid-rock ***,the magnitude of net Mg enrichment and Mg isotopic fractionation,particularly within the medium-high temperature hydrothermal systems in felsic-hosted settings,are not well studied *** we report elemental and isotopic compositions of Mg in hydrothermal chlorite-rich sediments,volcanic materials,and terrigenous sediments collected during the IODP Expedition 331 drilled to the thick sediment-covered and felsic-hosted middle Okinawa Trough(Iheya North Knoll) in the West *** investigate the sources of Mg in chlorite and Mg isotopic behavior at medium-high temperature hydrothermal *** 1 mol/L HCl leaching,Mg isotopic compositions of chlorite-rich sediments present overall similar values in the residual fractions and bulk samples albeit with slightly higher values in the *** differentiation primarily determines the Mg isotopic compositions,showing that siliciclastic residues have slightly higher δ^(26) Mg values than the leachates dominated by carbonates and oxides/*** Mg isotopic fractionation happened in the medium-high temperature(~150°C to 260°C) felsic-hosted hydrothermal system,with Δ^(26)MgChl-SW ranging from 0.15‰ to 0.71‰ and yielding a negative correlation with *** observation suggests the preferential incorporation of heavy Mg isotopes by the secondary chlorite *** infer that the medium-high temperature hydrothermal systems can take up about 8–14% of riverine input of Mg in the arc and back-arc *** removal of aqueous Mg in porewater and vent fluids by the medium-high temperature hydrothermal alterations in the arc and back-arc basins provides constraints on the Mg budget and isotopic composition of seawater.

关键词： Hydrothermal alteration Chlorite Okinawa Trough Magnesium(Mg)isotopes Integrated Ocean Drilling Program

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Characteristics of hydrogen/oxygen isotopes in water masses and implications for spatial distribution of freshwater in the Amundsen Sea,Southern Ocean

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Advances in Polar Science 2021年第3期32卷 221-238页

作者： shao hebin HE Jianfeng LUO Guangfu LAN Musheng YU Lejiang GUO Guijun LIAN Ergang MNR Key Laboratory for Polar Science Polar Research Institute of ChinaShanghai 200136China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China State Key Laboratory of Marine Geology Tongji UniversityShanghai 20092China

Antarctica’s marginal seas are of great importance to atmosphere-ocean-ice interactions and are sensitive to global climate *** factors account for the freshwater budget in these regions,including glacier melting,seasonal formation/decay of sea ice,and ***(H)and oxygen(O)isotopes represent useful proxies for determining the distribution and migration of water *** analyzed the H and O isotopic compositions of 190 seawater samples collected from the Amundsen Sea during the 34th Chinese Antarctic Research Expedition in 2017/*** upper-oceanic structure(3%)of freshwater generally lie in the upper~50 m and extend from Antarctica to~65°S in the meridional direction(anomalously low freshwater proportion occurred between 68°S and 71°S).Winter Water mainly occupied the layer between 50 and 150 m south of 71°S in the western Amundsen *** water structure and spatial distribution of freshwater in the upper Amundsen Sea were found influenced mainly by the rates of basal and surficial melting of ice shelves,seasonal alternation of sea ice melt/formation,wind forcing,and regional *** to the distance between heavy sea ice boundary(HSIB)and ice shelves is much shorter in the western HSIB than the east HSIB,the western part of the heavy sea ice boundary includes a higher proportion of freshwater than the eastern regi

关键词： hydrogen and oxygen isotopes freshwater ice shelf sea ice upwelling Circumpolar Deep Water Amundsen Sea Southern Ocean

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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

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 365-366页

作者： WANG Meng LI Qing CAI Feng LIANG Jie YAN Guijing DONG Gang WANG Feng shao hebin LUO Di CAO Yimin State Key Laboratory of Gas Hydrates Ministry of Land Resource Qingdao 266071 Shandong China Faculty of Earth Resources China University of Geosciences Wuhan 430074 Hubei China Function Laboratory of Marine Geo-Resource Evaluation and Exploration Technology Qingdao 266071Shandong China School of Ocean and Earth Science Tongji University Shanghai 200092 China Petro China Coalbed Methane Company Limited Beijing 100028 China

Objective Authigenic pyrite often develops extensively in marine sediments,which is an important product of sulfate reduction in an anoxic *** has a specific appearance and complicated sulfur isotopic properties,and acts as important evidence of methane seep in marine *** AOM（anaerobic oxidation of methane）activity has developed in the Okinawa Trough.

关键词： AOM 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

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Widespread Methane Seep Activities along the Western Slope of the Okinawa Trough, East China Sea

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1505-1506页

作者： LI Qing CAI Feng YAN Guijing LIANG Jie shao hebin WANG Meng DONG Gang WANG Feng SUN Yunbao LUO Di The Key Laboratory of Gas Hydrate Ministry of Land and Resources Qingdao Institute of Marine Geology Qingdao 266071 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao266071 China State Key Laboratory of Marine Geology Tongji University Shanghai 20092 China Key Laboratory of Tectonics and Petroleum Resources Ministry of Education Wuhan 430074 China

The westem 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 me... 详细信息

关键词： than this Widespread Methane Seep Activities along the Western Slope of the Okinawa Trough,East China Sea SMI show AOM

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长江口及其邻近海域悬浮体地球化学组成及其影响因素

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海洋学报 2013年第6期35卷 54-66页

作者：邵和宾范德江张晶李清中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室山东青岛266100 国土资源部青岛海洋地质研究所海洋油气与环境地质国土资源部重点实验室山东青岛266071 国土资源部青岛海洋地质研究所山东青岛266071

基于2010年10月国家自然科学基金委东海调查公共航次所获得的数据和悬浮体样品，使用ICP—AES、ICP—MS仪器对悬浮体中的主、微量元素含量进行了测定，对悬浮体中元素组成、空间分布及其影响因素进行了研究，结果表明：长江口及邻近海... 详细信息

基于2010年10月国家自然科学基金委东海调查公共航次所获得的数据和悬浮体样品，使用ICP—AES、ICP—MS仪器对悬浮体中的主、微量元素含量进行了测定，对悬浮体中元素组成、空间分布及其影响因素进行了研究，结果表明：长江口及邻近海域悬浮体中主量元素铝、镁、铁、钙等含量为1％～30％，含量以铝为主；微量元素镉、铬、钴、铜、锰、镍、铅、钒等含量为7z×10^-6～n×10，以锰最高；铝与铁、锰以及大部分的微量元素都有良好的相关性，指示这些主量元素以陆源输入为主和微量元素被细颗粒物质吸附为主的特征。水团对长江口及邻近海域颗粒态地球化学组分的空间分布具有重要的影响，其中铝、铁及铬、钴、铜、锰、镍、钒等元素受水团的制约更加显著。

关键词：长江口悬浮体元素组成地球化学水团

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南极普里兹湾海底表层沉积物中重金属分布特征及其潜在环境风险评价

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极地研究 2024年第2期36卷 128-139页

作者：张浩崔迎春邵和宾李升贵宗师自然资源部极地科学重点实验室中国极地研究中心(中国极地研究所)上海200136

为了解普里兹湾表层沉积物主要重金属的污染特征,本研究利用中国第29次南极考察航次获取的样品,分析了表层沉积物中钴(Co)、镍(Ni)、铜(Cu)、锌(Zn)、铅(Pb)和铬(Cr)等6种重金属的含量,探讨其分布特征,利用潜在生态风险指数法与地质累... 详细信息

为了解普里兹湾表层沉积物主要重金属的污染特征,本研究利用中国第29次南极考察航次获取的样品,分析了表层沉积物中钴(Co)、镍(Ni)、铜(Cu)、锌(Zn)、铅(Pb)和铬(Cr)等6种重金属的含量,探讨其分布特征,利用潜在生态风险指数法与地质累积指数法评价了普里兹湾表层沉积物重金属潜在环境风险。结果表明,普里兹湾表层沉积物中重金属元素平均含量从高到低依次为Zn>Cr>Cu>Ni>Pb>Co,分布整体呈现近岸低、远岸高的特征,表现出明显的沉积粒级富集效应。其空间分布特征也具有同源性,表明相似的物源供给与沉积过程。潜在生态风险指数评价结果表明,各调查站区均为低生态风险,重金属元素地质累积指数普遍小于0,总体为清洁状态,其中综合潜在生态风险指数平均值为7.45。相关性分析表明,除Pb元素外,重金属元素间均表现出良好的正相关性,并与陆源表征元素Ti及沉积物平均粒径呈良好正相关性,与沉积物分选系数呈良好的负相关性。

关键词：重金属海底表层沉积物来源分析生态环境风险评价普里兹湾

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南大洋和南极考察航线海表超微型浮游生物分布及影响因子

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海洋学报 2023年第1期45卷 102-113页

作者：罗光富何剑锋邵和宾曹叔楠蓝木盛张迪中国极地研究中心南极长城极地生态国家野外科学观测研究站上海200136 中国极地研究中心自然资源部极地科学重点实验室上海200136 同济大学环境科学与工程学院上海200129

南极考察航线跨越全球多个大洋,对认识超微型浮游生物在全球尺度分布及变化具有重要意义。依托中国第33次南极考察,利用流式细胞仪对航线海表水样中的超微型浮游生物进行了现场测定。结果表明,在热带与温带海域,超微型浮游生物量可占总... 详细信息

南极考察航线跨越全球多个大洋,对认识超微型浮游生物在全球尺度分布及变化具有重要意义。依托中国第33次南极考察,利用流式细胞仪对航线海表水样中的超微型浮游生物进行了现场测定。结果表明,在热带与温带海域,超微型浮游生物量可占总叶绿素a浓度的60%以上,在南大洋则集中在15%~40%;原绿球藻主要分布在40°S以北海域,聚球藻主要分布在50°S以北海域,而超微型真核藻类和异养细菌则在沿线各海域均有明显分布。在纬向上,原绿球藻、聚球藻、超微型真核藻类和异养细菌的平均丰度分别为(5.50±9.09)×10^(3) cells/mL、(13.56±20.33)×10^(3) cells/mL、(3.87±3.08)×10^(3) cells/mL和(6.39±4.78)×10^(5) cells/mL;南大洋海域,超微型真核藻类和异养细菌的平均丰度分别为(3.31±1.46)×10^(3) cells/mL和(4.68±4.39)×10^(5) cells/mL,在少数站位检测到较低丰度的聚球藻,平均值为(0.38±0.39)×10^(3) cells/mL。纬向上,超微型真核藻类与温度呈显著负相关,原绿球藻与温度呈正相关,盐度与营养盐对其影响较弱;南大洋海域,超微型浮游生物与营养盐显著相关,在南极半岛海域大量消耗硝酸盐、磷酸盐和硅酸盐,而在罗斯海则主要利用硝酸盐与磷酸盐。

关键词：超微型浮游生物原绿球藻聚球藻超微型真核藻类南极南大洋

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Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： Song He Li Li Sai Wang shao-Jiang Wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

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自生碳酸盐岩与底栖有孔虫碳同位素特征对多幕次甲烷事件的耦合响应——以IODP 311航次1328和1329站位为例

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海洋地质与第四纪地质 2015年第5期35卷 37-46页

作者：李清王家生蔡峰梁杰胡高伟孙治雷邵和宾国土资源部海洋油气与环境地质重点实验室青岛266071 中国地质大学(武汉)生物地质与环境地质国家重点实验室武汉430074 青岛海洋地质研究所青岛266071 同济大学海洋与地球科学学院上海200092

甲烷渗漏活动及其甲烷厌氧氧化(AOM)在自生碳酸盐岩沉淀的同时,也通过影响孔隙水溶解无机碳(DIC)进而影响着周围环境中底栖有孔虫,以往的文章鲜有报道二者的耦合响应。研究开展了综合大洋钻探计划IODP 311航次两个钻孔(1328和1329)中获... 详细信息

甲烷渗漏活动及其甲烷厌氧氧化(AOM)在自生碳酸盐岩沉淀的同时,也通过影响孔隙水溶解无机碳(DIC)进而影响着周围环境中底栖有孔虫,以往的文章鲜有报道二者的耦合响应。研究开展了综合大洋钻探计划IODP 311航次两个钻孔(1328和1329)中获得的自生碳酸盐岩和底栖有孔虫(Uvigerina peregrina)同位素研究,发现晚更新世以来多个层位获得的自生碳酸盐岩和底栖有孔虫的稳定碳同位素变化趋势均呈现一致的负偏碳同位素特征,但是,同层位的自生碳酸盐岩碳同位素负偏程度要比底栖有孔虫大一个数量级。自生碳酸盐岩与底栖有孔虫碳同位素变化趋势的一致性表明二者对于甲烷渗漏作用有较好的共同响应。AOM作用对孔隙水中溶解无机碳(DIC)的影响可在重碳酸氢根通过局部环境的过饱和沉淀自生碳酸盐岩的同时,也能部分参与底栖有孔虫的成壳,两者在成因方面是耦合的。综合结合自生碳酸盐岩和底栖有孔虫的碳同位素特征可以避免单一载体易受后期成岩改造影响而掩盖甲烷渗漏活动的识别。

关键词：甲烷厌氧氧化自生碳酸盐岩底栖有孔虫碳同位素耦合响应甲烷渗漏

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The effects of exercise interventions on brain-derived neurotrophic factor levels in children and adolescents:a meta-analysis

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Neural Regeneration Research 2025年第5期20卷 1513-1520页

作者： Xueyun shao Longfei He Yangyang Liu Physical Education School Shenzhen UniversityShenzhenGuangdong ProvinceChina Shenzhen Institute of Neuroscience ShenzhenGuangdong ProvinceChina

Brain-derived neurotrophic factor is a crucial neurotrophic factor that plays a significant role in brain health. Although the vast majority of meta-analyses have confirmed that exercise interventions can increase brain-derived neurotrophic factor levels in children and adolescents, the effects of specific types of exercise on brain-derived neurotrophic factor levels are still controversial. To address this issue, we used meta-analytic methods to quantitatively evaluate, analyze, and integrate relevant studies. Our goals were to formulate general conclusions regarding the use of exercise interventions, explore the physiological mechanisms by which exercise improves brain health and cognitive ability in children and adolescents, and provide a reliable foundation for follow-up research. We used the Pub Med, Web of Science, Science Direct, Springer, Wiley Online Library, Weipu, Wanfang, and China National Knowledge Infrastructure databases to search for randomized controlled trials examining the influences of exercise interventions on brain-derived neurotrophic factor levels in children and adolescents. The extracted data were analyzed using Review Manager 5.3. According to the inclusion criteria, we assessed randomized controlled trials in which the samples were mainly children and adolescents, and the outcome indicators were measured before and after the intervention. We excluded animal experiments, studies that lacked a control group, and those that did not report quantitative results. The mean difference(MD;before versus after intervention) was used to evaluate the effect of exercise on brain-derived neurotrophic factor levels in children and adolescents. Overall, 531 participants(60 children and 471 adolescents, 10.9–16.1 years) were included from 13 randomized controlled trials. Heterogeneity was evaluated using the Q statistic and I^(2) test provided by Review Manager software. The meta-analysis showed that there was no heterogeneity among the studies(P = 0.67,

关键词： adolescents brain-derived neurotrophic factor children exercise meta-analysis randomized controlled trials

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