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Distribution and composition of authigenic minerals in surface sediments of the western Gulf of Thailand

Acta Oceanologica Sinica 2015年第12期34卷 125-136页

作者： WANG Kunshan SHI Xuefa qiao shuqing KORNKANITNAN Narumol KHOKIATTIWONG Somkiat Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration Function Laboratory for Marine Geology National Oceanography Laboratory Marine and Coastal Resource Research Center Phuket Marine Biological Center

Generation, morphology, and distribution of authigenic minerals directly reflect sedimentary environment and material sources. Surface sediments were collected from the western Gulf of Thailand during 2011–2012, and 159 samples were analyzed to determine detrital minerals. Authigenic minerals, including siderite, pyrite, and glauconite, are abundant whereas secondary minerals, such as chlorite and limonite, are distributed widely in the study area. Siderite has a maximum content of 19.98 g/kg and appears in three types from nearshore to continental shelf, showing the process of forming-maturity-oxidation. In this process, the Mn O content in siderite decreases, but FeOand Mg O content increase. Colorless or transparent siderite pellets are fresh grains generated within a short time and widely distributed throughout the region; high content appears in coastal area where river inputs are discharged. Translucent cemented double pellets appearing light yellow to red are mature grains; high content is observed in the central shelf. Red-brown opaque granular pellets are oxidized grains,which are concentrated in the eastern gulf. Pyrite is mostly distributed in the central continental shelf with an approximately north–south strip. Pyrite are mainly observed in foraminifera shell and distributed in clayey silt sediments, which is similar to that in the Yangtze River mouth and the Yellow Sea. The pyrite in the gulf is deduced from genetic types associated with sulfate reduction and organic matter decomposition. Majority of glauconite are granular with few laminar. Glauconite is concentrated in the northern and southern parts within the boundary of 9.5° to 10.5°N and is affected by river input diffusion. The distribution of glauconite is closely correlated with that of chlorite and plagioclase, indicating that glauconite is possibly derived from altered products of chlorite and plagioclase. The KO content of glauconite is low or absent, indicating its short formation time.

关键词： Gulf of Thailand surface sediment authigenic minerals siderite glauconite composition of minerals

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Major Mid-Late Holocene Cooling in the East China Sea Revealed by an Alkenone Sea Surface Temperature Record

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Journal of Ocean University of China 2014年第6期13卷 935-940页

作者： ZHAO Meixun DING Ling XING Lei qiao shuqing YANG Zuosheng Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of China Institute of Marine Organic Geochemistry Ocean University of China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration College of Marine Geoscience Ocean University of China

Although the mid-late Holocene cold and dry event about 4000years ago （the 4ka event） has been observed almost globally, it was most prominent in terrestrial climate proxies from the lower latitudes. Here we evaluate the oceanic response to this event in terms of a Holocene sea surface temperature （SST） record reconstructed using the U^7 index for Core B3 on the continen- tal shelf of the East China Sea. The record reveals a large temperature drop of about 5~C from the mid-Holocene （24.7~C at 5.6ka） to the 4ka event （19.2~C at 3.8ka）. This mid-late Holocene cooling period in Core B3 correlated with （i） decreases in the East Asia summer monsoon intensity and （ii） the transition period with increased E1 Nifio/Southern Oscillation activities in the Equatorial Pa- cific. Our SST record provides oceanic evidence for a more global nature of the mid-late Holocene climate change, which was most likely caused by a southward migration of the Intertropical Converge Zone in response to the decreasing summer solar insolation in the Northern Hemisphere. However, the large SST drop around Core B3 indicates that the mid-late Holocene cooling was regionally amplified by the initiation/strengthening of eddy circulation/cold front which caused upwelling and resulted in additional SST de- crease. Upwelling during the mid-late Holocene also enhanced with surface productivity in the East China Sea as reflected by higher alkenone content around Core B3.

关键词： sea surface temperature alkenone East China Sea 4 ka ITCZ

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Distribution of major and trace elements in surface sediments of Hangzhou Bay in China

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Acta Oceanologica Sinica 2012年第4期31卷 89-100页

作者： LIU Shengfa LIU Yanguang YANG Gang qiao shuqing LI Chaoxin ZHU Zhiwei SHI Xuefa First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Key Laboratory of Marine Sedimentology and Environmental Geology State OceanicAdministrationQingdao 266061China

The Inductively Coupled Plasma Optical Emission Spectrometer was used to analyze sediment samples collected from the Hangzhou Bay to determine major and trace elemental concentrations. Based on these concentrations, the study area can be classified into three geochemical provinces. Province I covers the northern Hangzhou Bay area and contains high concentrations of A120~, Fe203, MgO, Na20, K20, MnO, Cr, Cu, Ni, Pb, V, Co and Zn. Province III is located in the western Hangzhou Bay, near the Qiantang River mouth, and contains high concentrations of SiO~, Na20, P205~ TiO2, Cr, Sr, Zr. Province II is located in the middle and eastern Hangzhou Bay, with the medium concentrations of major and trace elements. The results also demonstrate that the grain size is the dominating factor controlling the spatial variations of elemental concentrations, and the Changjiang River （Yangtze River） and Qiantang River sediments play an important role in the distribution of these elements. Anthropogenic impact on heavy metal concentrations （especially Cr, Sr and Zr） can be detected in the surface sediments near the Qiantang River mouth.

关键词： Hangzhou Bay Changjiang River sediments major and trace elements grain size,heavy metals

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Distribution, burial fluxes and carbon sink effect of sedimentary organic carbon in the eastern China seas

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Science China Earth Sciences 2024年第10期67卷 3062-3082页

作者： Xuefa SHI Bin WU shuqing qiao Zhengquan YAO Limin HU Yazhi BAI Shan HU Jie SHENG Yanguang LIU Shengfa LIU Kunshan WANG Jianjun ZOU Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Qingdao Marine Science and Technology CenterQingdao 266237China Key Laboratory of Deep Sea Mineral Resources Development Shandong Province(Preparatory)Qingdao 266061China Key Laboratory of Submarine Geosciences and Technology College of Marine GeosciencesOcean University of ChinaQingdao 266100China

The ocean is the largest active carbon reservoir on Earth. Organic carbon(OC), as the primary species of carbon sequestration in the ocean, plays an important role in the global carbon cycle through its deposition and burial. In this study,sedimentary OC data from 5796 stations, together with relevant geochemical and sedimentological parameters in the Bohai Sea,Yellow Sea, and East China Sea(BYES) were used to summarize and elucidate the distribution and burial patterns of sedimentary OC, and assess carbon sink effect of sedimentary OC burial. The results show that the OC content in the sediments of the BYES ranges from 0.00% to 2.12%, with an average content of 0.47%±0.26%. OC content is significantly correlated with finegrained sediments, with an average OC content in mud areas being 39% higher than that in non-mud areas. Modern OC buried in the BYES are mainly deposited in 7 major mud areas, with a total sedimentary OC burial flux of approximately 8.20 Mt C yr^(–1).Among them, the burial flux of biospheric OC is 6.92 Mt C yr^(–1), equivalent to the OC consumption amount of silicate weathering of the 9 major river basins in the eastern China. In its natural state, the annually sequestered OC in the sediments of the eastern China seas is equivalent to 25.37 Mt of atmospheric CO_(2), indicating a significant carbon sink effect. The distribution and burial of terrigenous OC in the BYES are mainly influenced by the large river inputs and complex marine hydrodynamic environment,while human activities such as dam construction have significantly altered the OC burial in these coastal mud areas.

关键词： Sedimentary organic carbon Burial flux Carbon sink effect Carbon cycle Eastern China seas

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Clay mineral composition and their sources for the fluvial sediments of Taiwan Residents rivers

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Chinese Science Bulletin 2012年第6期57卷 673-681页

作者： LI ChuanShun SHI XueFa KAO ShuhJi CHEN MinTe LIU YanGuang FANG XiSheng LUE HuaHua ZOU JianJun LIU ShengFa qiao shuqing First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Research Center for Environmental Changes Academia SinicaTaipei 11529China Institute of Applied Geosciences Taiwan Ocean UniversityKeelung 20224China

Located at the collision boundary between the Philippine Sea Plate and the Eurasian Continental Plate,the island of Taiwan is generally recognized as an important example in the MARGINS Program Science Plan and "source-to-sink" research because of its high tectonic activity,heavy rainfall and unique *** suspended sediment loads are transported to the adjacent ocean by Taiwan Residents rivers every year,making Taiwan an important source of sediments into the adjacent seas and a natural laboratory for studying the systemic movement of fluvial sediments from source to sink.A detailed study on the clay mineral composition of surface sediments collected from the drainage basins of 12 Taiwan Residents rivers using X-ray diffraction methods was *** results indicated that the clay mineral assemblages consisted dominantly of illite(approximately 73%) and chlorite(approximately 24%),with lesser abundances of kaolinite(approximately 3%) and even lower levels of smectite from the Danshuei River sediments in northwestern *** Jhuoshuei River sediments from western Taiwan contained clay mineral assemblages that consisted of illite(approximately 75%) and chlorite(approximately 25%),but they lacked kaolinite and *** southwestern Taiwan,the clay mineral assemblages were dominated by illite(approximately 75%) and chlorite(approximately 23%),but had a low abundance of kaolinite(generally < 2%) and no *** clay mineral assemblages in eastern Taiwan are obviously different from those in western parts of the *** most noticeable difference is that the average abundance of chlorite in the Hualien River from eastern Taiwan was the highest(approximately 48%) of all the Taiwan Residents *** concluded that,in general,the clay mineral assemblages in Taiwan Residents rivers were mainly composed of illite and chlorite with kaolinite and smectite being scarce,and these trends are different from those in China's mainland *** clay miner

关键词：河流沉积物粘土矿物矿物组成台湾岛 X射线衍射方法矿物组合表层沉积物菲律宾海板块

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Records of the East Asian winter monsoon from the mud area on the inner shelf of the East China Sea since the mid-Holocene

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Chinese Science Bulletin 2010年第21期55卷 2306-2314页

作者： LIU ShengFa SHI XueFa LIU YanGuang qiao shuqing YANG Gang FANG XiSheng WU YongHua LI ChaoXin LI XiaoYan ZHU AiMei GAO JingJing Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

AMS14C dating and analysis of grain size,major elements and clay minerals were applied to Core MZ01 from the mud area on the inner shelf of the East China *** on the environmentally sensitive grain size,clay mineral and major element assemblages,the history of the East Asia winter monsoon since the mid-Holocene could be *** three proxies,mean grain size(>9.71μm),chemical index of alteration(CIA)and ratio of smectite to kaolinite in particular,show similar fluctuation patterns. Furthermore,10 extreme values corresponding to the contemporary cooling events could be recognized since the mid-Holocene;these extreme values are likely to have been caused by the strengthening of the East Asia winter *** cooling events correlated well with the results of theδ18O curves of the Dunde ice core and GISP2,which therefore revealed a regional response to global climate *** stages of the East Asia winter monsoon were identified,i.e.8300-6300 a BP,strong and unstable;6300-3800 a BP,strong but stable;3800-1400 a BP,weak and unstable;after 1400 a BP,weak but stable.

关键词：东亚冬季风中全新世 Sea 内陆架中期中国亚洲面积

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渤海地区全新世孢粉序列及古环境演化

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海洋学报 2012年第3期34卷 99-105页

作者：陈金霞石学法乔淑卿国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室山东青岛266061

通过对取自黄河口外泥质区的BH-264孔的沉积孢粉进行分析,对渤海地区全新世古植被和古环境演化历史进行了恢复。在早全新世(距今9.5～7.6ka)渤海地区气候温暖湿润,在陆缘海滨地带出现大量沼泽湿地,上面生长着莎草和香蒲等植被,在周围的... 详细信息

通过对取自黄河口外泥质区的BH-264孔的沉积孢粉进行分析,对渤海地区全新世古植被和古环境演化历史进行了恢复。在早全新世(距今9.5～7.6ka)渤海地区气候温暖湿润,在陆缘海滨地带出现大量沼泽湿地,上面生长着莎草和香蒲等植被,在周围的山地、丘陵和平原地区植被以松属和落叶栎属为主,并伴生着桦木属、榆科、桑科等树种;在中全新世(距今7.6～5.8ka)温度的升高和海平面上升,使BH-264孔沉积孢粉中松属占主导地位,不利于远距离传播的草本植物花粉含量降为全新世最低值;在距今5.8ka以后东亚夏季风减弱和降雨量减少导致渤海西部陆源海滨地带植被以旱生草本藜科、蒿属和菊属为主,黄河三角洲的形成缩短了研究区的离岸距离,使这些草本植物花粉易于传播到BH-264孔中沉积。

关键词：全新世渤海沉积物孢粉

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预处理过程中酸对黏土矿物的影响——基于标准矿物的XRD分析

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海洋科学进展 2023年第4期41卷 610-621页

作者：李秋玲乔淑卿方习生石学法河海大学海洋学院江苏南京210098 自然资源部第一海洋研究所海洋地质与成矿作用重点实验室山东青岛266061 崂山实验室海洋地质过程与环境功能实验室山东青岛266061

鉴定沉积物中黏土矿物的常用方法是X射线衍射(X-ray diffraction,XRD)分析。但不同的预处理方法会导致测试结果存在较大差异,例如,在去除样品中有机质和碳酸盐时,不同的试剂浓度、试剂种类以及反应条件等会导致实验结果不同。研究各种... 详细信息

鉴定沉积物中黏土矿物的常用方法是X射线衍射(X-ray diffraction,XRD)分析。但不同的预处理方法会导致测试结果存在较大差异,例如,在去除样品中有机质和碳酸盐时,不同的试剂浓度、试剂种类以及反应条件等会导致实验结果不同。研究各种预处理方法对黏土矿物XRD分析结果的影响程度,对改进黏土矿物测试方法、提高数据分析准确度具有重要意义。本文对钙蒙脱石(STx-1b)、铁绿泥石(CCa-2)、高岭石(KGa-1b)和伊利石(IMt-2)四种标准黏土矿物样品,进行了不同种类、不同浓度的酸和H2O_(2)处理的对比实验,并采用XRD分析评估各种处理方法对不同黏土矿物的影响。结果显示,质量分数为10%和30%的H2O_(2)处理对4种黏土矿物均不会产生影响;HCl处理会不同程度地破坏蒙脱石的晶体结构,随着HCl摩尔浓度由0.1、0.5 mol/L增大至1.0 mol/L,蒙脱石晶体结构被破坏的程度逐渐加大。因此,使用HCl除碳酸盐时,建议浓度不要超过0.5 mol/L;质量分数为10%的CH3COOH处理对4种黏土矿物的晶体结构均不会产生破坏,但可能因有机酸分子黏附在矿物晶体(尤其是蒙脱石)表面使衍射峰强度升高,这在实际应用中可能会造成蒙脱石相对含量计算结果偏高。

关键词：蒙脱石 HCl 醋酸 X射线衍射

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调水调沙期间黄河口羽状流的逐时变化

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海洋地质与第四纪地质 2018年第5期38卷 41-51页

作者：于永贵石学法迟万清胡子峰乔淑卿中国海洋大学海洋地球科学学院青岛266003 国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室青岛266061 青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室青岛266237 国家海洋局第一海洋研究所海洋工程环境与测绘研究中心青岛266061 河海大学海洋学院南京210098

2002年黄河实施调水调沙以来,黄河入海泥沙普遍以异轻羽状流的形式在河口附近的有限区域内堆积下来。采用2011年、2012年以及2013年调水调沙期间3期静止轨道海洋水色卫星(GOCI)数据对黄河口附近海域进行悬浮物浓度反演,提取了黄河口羽... 详细信息

2002年黄河实施调水调沙以来,黄河入海泥沙普遍以异轻羽状流的形式在河口附近的有限区域内堆积下来。采用2011年、2012年以及2013年调水调沙期间3期静止轨道海洋水色卫星(GOCI)数据对黄河口附近海域进行悬浮物浓度反演,提取了黄河口羽状流的逐时变化信息;通过黄河口水动力数值模拟以及风场、潮汐等实测数据分析,阐明了羽状流逐时变化的驱动机制。研究结果表明:黄河调水调沙前后黄河口羽状流表现出单向变化和往复变化两种不同的变化过程;而悬浮物浓度的逐时变化显示:河口附近不同站位的悬浮物浓度逐时变化过程差异较大,同一站位的悬浮物浓度可在1小时之内升高或降低约100mg/L。单向变化型羽状流主要受单向潮流的控制,且GOCI观测时段位于一个落潮或者涨潮过程,河流动力较弱;往复变化型羽状流受涨、落潮往复潮流的控制,涨、落潮流向的转换驱使羽状流向相反的方向运动,而且羽状流位于潮流切变带以内,切变锋对羽状流的形态、分布范围具有明显的切变效应。

关键词：调水调沙羽状流逐时变化驱动因素

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东海陆架与台湾海峡地层中混合事件层的发现与意义

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海洋科学进展 2023年第4期41卷 599-609页

作者：单新石学法金丽娜乔淑卿刘升发党院自然资源部第一海洋研究所山东青岛266061 自然资源部海洋地质与成矿作用重点实验室山东青岛266061 崂山实验室海洋地质过程与环境功能实验室山东青岛266235

混合事件层是混合重力流或浊流与碎屑流之间过渡流体类型的沉积产物,是21世纪初沉积学领域的重要发现。混合事件层通常发现于深海、深湖平原以及深水扇边缘等深水区域,在浅海相地层中尚未见到相关报道。本文以东海中部陆架和台湾海峡内... 详细信息

混合事件层是混合重力流或浊流与碎屑流之间过渡流体类型的沉积产物,是21世纪初沉积学领域的重要发现。混合事件层通常发现于深海、深湖平原以及深水扇边缘等深水区域,在浅海相地层中尚未见到相关报道。本文以东海中部陆架和台湾海峡内三角洲沉积中发现的全新世混合事件层为研究对象,对混合事件层的沉积和粒度特征进行分析,结合区域地质背景明确了混合事件层的成因可能为陆架内垮塌和异重流。本研究发现了浅海混合事件层碎屑流段分层的新现象,并将其解释为碎屑流垂向分层或纵向分异。本次三角洲-陆架地层中发现的混合事件层表明混合重力流不仅可以发生在深海区域,同时也是浅海重要的沉积物顺坡搬运方式。

关键词：东海陆架台湾海峡三角洲重力流混合事件层

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