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Clay minerals in Arctic Kongsfjorden surface sediments and their implications on provenance and paleoenvironmental change

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Acta Oceanologica Sinica 2018年第5期37卷 29-38页

作者： SHI Fengdeng SHI Xuefa SU Xin FANG Xisheng WU Yonghua CHENG Zhenbo yao zhengquan School of Ocean Sciences China University of Geosciences (Beijing) Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology The First Institute of OceanographyState Oceanic Administration Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology

Kongsfjorden is a typical fjord on the edge of the ice cap of the Arctic Svalbard-Barents Sea. Its inner bay is connected with a modern glacier front along the direction of the fjord axis with a significant gradient change in the parameters of hydrology, sedimentation, and biology. In summer, ice and snow melt-water and floating ice collapse continuously and thus transport the weathering products on the surrounding land into the sea. Thus Kongsfjorden is regards as a natural laboratory for the study of unique sedimentation in polar fjords under modern glacial-sea water conditions. In this study, fifty-two surface sediments were collected in Kongsfjorden for clay mineral analysis to study the sediment source and sediment-transport process. Our results indicate that clay minerals in the surface sediments from Kongsfjorden are mainly composed of illite, chlorite, and kaolinite, and no smectite is found. Rocks from different periods exposed extensively in the surrounding areas of Kongsfjorden provide an important material basis for clay minerals in the Kongsfjorden. Kaolinite may be mainly derived from the fluvial deposits, weathered from reddish sandstones and conglomerates during the Carboniferous *** is mainly derived from Proterozoic low-grade and medium-grade metamorphic phyllite, mica schist, and gneiss. While chlorite is mainly from Proterozoic low-grade metamorphic phyllite and mica schist. In the direction from the fluvio-glacial estuary to the sea of the glacier front of Kongsfjorden, illite increase gradually,and the content of kaolinite declines gradually. However, the change pattern of chlorite is insignificant, which may be related to the provenance. Kongsfjorden detritus is mainly transported by the fluvio-glacial streams and icebergs into the sea and deposited in the inner bay. Coarse sediments are rapidly deposited in the glacier front,estuary, and near-shore areas. Clay fraction begins to deposit significantly by 200–400 m after flowing into

关键词： Arctic Pole Kongsfjorden clay mineral provenance sedimentation

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Identification of the thick-layer greigite in sediments of the South Yellow Sea and its geological significances

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Chinese Science Bulletin 2014年第22期59卷 2764-2775页

作者： Jianxing Liu Xuefa Shi Shulan Ge Qingsong Liu zhengquan yao Gang Yang Paleomagnetism and Geochronology Laboratory (SKL-LE) Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Marine Sedimentation and Environmental Geology First Institute of Oceanography State Oceanic Administration

Magnetic minerals in sediments of the continental shelf are sensitive to environmental ***,to determine the exact phases of magnetic minerals is the prerequisite to investigate the paleoenvironmental *** this study,a comprehensive rock magnetic investigation,coupled with mineralogical studies,was carried out on the long core NHH01(with a length of 125.64 m)from the central continental shelf of the South Yellow ***-domain greigite was identified as the dominant magnetic carrier in sediments between44.90 and 51.80 m,and terrigenous magnetite is the major magnetic phase in the adjacent *** existence of greigite unambiguously indicates an anoxic *** tentatively interpreted that such an environment could be formed by the fast sea level changes,long-existing of the cold eddies during warm stages,or in a lake which might be related to locally tectonic ***,the occurrence of the thick-layer greigite could supply a new perspective to paleoenvironmental or even tectonic studies.

关键词：南黄海中部沉积物地质意义古环境意义识别厚层环境变化磁性矿物

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Variations of alkenone temperature in the Sea of Japan during the last 170 ka and its paleoceanographic implications

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Chinese Science Bulletin 2014年第33期59卷 4498-4509页

作者： Yanguang Liu Jiaojie Chen Jinxia Chen Lei Xing Jianjun Zou zhengquan yao Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology Ocean University of China

Two sediment cores, KCES1 and ODP797,which were recovered from the Sea of Japan(JS), were measured for alkenone-derived sea surface temperatures(UK037-SSTs). Our results revealed that the SSTs closely follow the glacial-interglacial cycles during the last 170 ka,except in the last glacial maximum(LGM), during which the SST was higher than in the Holocene. The anomalous high temperature in the LGM is considered as an effect of the intrusion of a low salinity water mass into the JS when the sea level was almost below 130 m. On the glacialinterglacial to orbital timescale, the UK037-SSTs record in the JS correlated well with the benthic foraminiferal d18 O record and solar insolation, which suggests the dominant control of solar insolation and its related sea ice development on the SST in the JS. On the sub-orbital/millennial timescale, reduced SST corresponds to an enhanced east asian winter monsoon(EAWM) during the last glacial period(MIS3 and MIS4), indicating the dominant control of sea ice expansion due to the enhanced EAWM on the SST in the JS. In contrast, during the last interglacial period(MIS5), the SST in the JS was controlled by variations in the east Asian summer monsoon. These results highlight the key role of solar insolation and associated glacialinterglacial conditions in the variations of the SST in the JS since the last 170 ka.

关键词：海表温度日本海古海洋学烯酮末次间冰期太阳辐射 SST 末次盛冰期

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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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A Study on the Quaternary Activity of the Tianjin Fault

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Earthquake Research in China 2010年第3期24卷 353-362页

作者： Shao Yongxin Li Zhenhai Chen Yukun Ren Feng yao zhengquan Earthquake Administration of Tianjin Municipality Tianjin 300201 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment CAS Xi＇an 710075 China

The Tianjin fault includes South Tianjin fault and North Tianjin fault. Based on the results of artificial seismic exploration,four borehole profiles were laid out respectively west of Jinghai county town,Chaomidian village of Xiqing district,Xiaonanhe village of Xiqing district and Zhutoudian village of Ninghe county,to implement the exploration of these faults. Through identification of microfossils,the locations of marine beds in boreholes were obtained in this work,and through stratigraphic dating,the ages of the first,second and third marine beds were determined. Through strata correlation with the marine beds as key marker beds and integrating with the test results of paleo geomagnetism of boreholes BZ2 and TN3,the activity in the North and South Tianjin faults was analyzed and studied. The results indicate that there is no evidence of movement of the South Tianjin fault since the Late Pleistocene,but may have had weak activity before the Middle Pleistocene. No evidence of activity in the North Tianjin fault was found since the Late Pleistocene either,but might have been active in the early stage of the Early Pleistocene. These show that the activity of the South Tianjin fault is stronger than that of the North Tianjin fault. At the same time,we find that the second,third and fourth marine beds are lacking to some extent in different areas. So,before they are used in strata correlation, the age of marine beds must be determined,otherwise the results of strata correlation may lead to errors. For the second marine bed,where there has been dispute about its age,we consider the age to be about 70ka.

关键词： Tianjin fault Marine bed Stratigraphic correlation Fault activity

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Identification of the thick-layer greigite in sediments of the South Yellow Sea and its geological significances

Identification of the thick-layer greigite in sediments of t...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Jianxing Liu Xuefa Shi Shulan Ge Qingsong Liu zhengquan yao Gang Yang Paleomagnetism and Geochronology Laboratory (SKL-LE) Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Marine Sedimentation and Environmental Geology First Institute of OceanographyState Oceanic Administration

Magnetic minerals in sediments of the continental shelf are sensitive to environmental ***, to determine the exact phases of magnetic minerals is the prerequisite to investigate the paleoenvironmental significances. In this study, a comprehensive rock magnetic investigation, coupled with mineralogical studies, was carried out on the long core NHH01(with a length of 125.64 m) from the central continental shelf of the South Yellow Sea. Single-domain greigite was identified as the dominant magnetic carrier in sediments between44.90 and 51.80 m, and terrigenous magnetite is the major magnetic phase in the adjacent layers. The existence of greigite unambiguously indicates an anoxic *** tentatively interpreted that such an environment could be formed by the fast sea level changes, long-existing of the cold eddies during warm stages, or in a lake which might be related to locally tectonic uplifting. Therefore, the occurrence of the thick-layer greigite could supply a new perspective to paleoenvironmental or even tectonic studies.

关键词： Rock magnetism Greigite Continental shelf environment South Yellow Sea

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Magnetostratigraphy of the Xihe loess-soil sequence and implication for late Neogene deformation of the West Qinling Mountains

Magnetostratigraphy of the Xihe loess-soil sequence and impl...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Junyi Ge Zhengtang Guo Tao Zhan zhengquan yao Chenglong Deng Frank Oldfield Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyState Oceanic Administration State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

The Qinling Mountain range forms an important climate barrier between southern and northern *** western part,referred to as the West Qinling,constitutes a unit of northeastern Tibetan *** uplift history of Qinling during the Neogene is still a contentious issue. Magnetostratigraphic results from the 150-m-thick Xihe loess-soil sequence(NL-Ⅵ),located on the alluvial highlands surrounding an intermontane basin from the West Qinling,indicate 17 reverse and 17 normal *** are correlative with the interval from chron C5n to chron C2Ar in the Geomagnetic Polarity *** age of the NL-VI section can thus be palaeomagnetically constrained to a period from 10.5 to 4.2 *** middle portion of the section has been affected intermittently by surface erosion *** loess is sensitive to any erosion that may have been induced by substratum deformation and tectonic uplift, this sequence indicates that the intermontane basin-ridge pattern of the West Qinling had already been formed by 10.5 Ma,thus providing suitable topographic conditions for aeolian *** timing is consistent with a significant deformation phase between～14 and 10 Ma reported for the Tibetan ***,the complete preservation of the NL-VI loess-soil sequence precludes both intense deformation of the substrate and rapid uplift of the West Qinling between 10.5 and 4.2 *** the erosion-affected portion of the NL-VI section reflects some degree of tectonic instability from 8.3 to 6.9 Ma,the intensity must have been sufficiently weak to prevent the erosion of the aeolian *** further suggest that the late Miocene growth of the Tibetan Plateau has not significantly affected the West ***,the studied NL-VI aeolian sequence provides not only independent evidence for the uplift history of the West Qinling within an accurate chronological framework,but also provides new insights into the tectonic changes on the northeastern Tibetan Plateau.

关键词： Magnetostratigraphy Rock and mineral magnetism Tectonics and landscape evolution Asia

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化学成份在钧瓷胎釉反应层中分布模式的线扫描分析

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化学学报 2011年第8期69卷 912-918页

作者：李清临徐承泰贺世伟姚政权武汉大学历史学院武汉430072 安徽省文物考古研究所合肥230061

利用能量色散X射线荧光(EDXRF)探针,对一批金元时期的钧瓷样品进行了线扫描分析,以研究钧瓷胎釉间薄层物质的性质及其它相关问题.结果显示,胎釉间薄层物质的化学组成介于胎釉之间,因此其应为在烧制过程中形成的反应层.分析还发现,反应... 详细信息

利用能量色散X射线荧光(EDXRF)探针,对一批金元时期的钧瓷样品进行了线扫描分析,以研究钧瓷胎釉间薄层物质的性质及其它相关问题.结果显示,胎釉间薄层物质的化学组成介于胎釉之间,因此其应为在烧制过程中形成的反应层.分析还发现,反应层中的K2O含量高于瓷釉和瓷胎,与其它氧化物均有不同.推断反应层中K2O含量高的现象,是瓷釉和反应层中特定的SiO2和Al2O3组成,硅酸盐玻璃的特定网络结构,以及SiO2,Al2O3及K2O在玻璃体中的作用和特性等因素的综合作用结果,而非单纯的K+具有较强的渗透能力所致.

关键词：钧瓷反应层化学成份线扫描 EDXRF

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始新世-渐新世气候转变研究进展

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地质论评 2012年第1期58卷 91-105页

作者：肖国桥张仲石姚政权中国地质大学生物地质与环境地质国家重点实验室中国武汉430074 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室中国西安710075 中国科学院大气物理研究所竺可桢-南森国际研究中心中国北京100029 挪威Bjerknes气候研究中心挪威卑尔根N-5007 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中国山东青岛266061

始新世—渐新世(E—O)气候转变(34Ma前后)是新生代气候演化过程中最显著的变冷事件之一,标志着地球气候由"温室"进入"冰室"。这一转变伴随着地球环境的一系列重大变化,对于研究新生代气候变冷的驱动机制、区域气候对全球重大气候事件的... 详细信息

始新世—渐新世(E—O)气候转变(34Ma前后)是新生代气候演化过程中最显著的变冷事件之一,标志着地球气候由"温室"进入"冰室"。这一转变伴随着地球环境的一系列重大变化,对于研究新生代气候变冷的驱动机制、区域气候对全球重大气候事件的响应方式、重大气候事件对生态环境及生物演替的影响等具有重要意义。近年来地质记录和气候模拟在E—O转变研究上取得了一系列重要进展:①不同纬度区的地质记录揭示出这一转变伴随着全球性的显著降温,指示其触发因素是全球性的;②气候模拟研究揭示出大气CO2浓度降低及与之联系的全球碳循环变化是导致这一转变的主因,否定了传统认为的环南极流形成导致E—O气候变冷的假说;③深海沉积记录揭示出这一转变过程持续400～500ka,表现为全球降温和南极冰盖形成先后两阶段变化;④海—陆气候记录的对比初步揭示出陆地区域的干旱化可能主要与全球降温(对应于E—O转变的第一阶段)相关。当前对E—O气候转变的研究还存在地质记录分辨率不够高、模拟结果与地质记录不完全吻合、陆地记录相对较少等方面的不足。更精确的大气CO2浓度和温度的重建、更多高分辨率海—陆气候记录的研究以及古气候数值模拟的改进有望进一步揭示出E—O转变过程中气候系统各要素的变化特征和相互关系,为更深入认识这一转变的驱动机制提供依据。

关键词：始新世—渐新世气候转变全球变冷大气CO2 气候变化机制

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寿州窑瓷器的测试与初步分析

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中国科学技术大学学报 2011年第1期41卷 22-28页

作者：尹若春姚政权李迎华汪常明中国科学技术大学地球和空间科学学院安徽合肥230026 安徽省文物考古研究所安徽合肥230061 南昌大学人文学院江西南昌330033 广西民族大学科学与社会发展研究中心广西南宁530006

采用能量色散X射线荧光(EDXRF)技术和热膨胀法对寿州窑瓷器的元素组成和烧成温度进行了测试分析.研究结果表明:寿州窑瓷器的瓷胎具有高铝低硅的特点;瓷釉属于钙釉,寿州窑的青釉和黄釉产品不是由于着色元素的差别引起的,很可能是在不同... 详细信息

采用能量色散X射线荧光(EDXRF)技术和热膨胀法对寿州窑瓷器的元素组成和烧成温度进行了测试分析.研究结果表明:寿州窑瓷器的瓷胎具有高铝低硅的特点;瓷釉属于钙釉,寿州窑的青釉和黄釉产品不是由于着色元素的差别引起的,很可能是在不同的烧造氛围中形成的;管咀孜窑口的青釉瓷器烧成温度在1 200℃以上,住院部窑口的黄釉瓷器烧成温度在1 100℃以上,1 200℃左右.

关键词：寿州窑青釉黄釉能量色散X射线荧光(EDXRF) 热膨胀法

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