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Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis

Acta Oceanologica Sinica 2007年第5期26卷 54-65页

作者： ge shulan SHI Xuefa WU Yonghua LEE Tehquei XIONG Yingqian SAITO Yoshiki Marine Sedimentation and Environmental geology Key Laboratory of State Oceanic Administration First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Institute of geology and geophysics Chinese Academy of Sciences Beijing 100029 China Institute of Earth Sciences Taipei China geology Survey of Japan Tsukuba 306 - 8567 Japan

Detailed rock magnetic investigations were undertaken at 2 -4 cm interval for the gravity core CSHI （with a length of 17.36 m） from the northern Okinawa Trough. Time-scale of the core was constructed by two characteristic tephras and foraminferal assemblages, indicating an age of 50 ka for the bottom of the core. Except for three tephras and abrupt decrease in surface, there are little changes in all kinds of rock magnetic parameters that can be correlated to the climate change for the last 50 ka. Different from the common sediments, most S-ratios （S equals the negative ratio of IRM-0.3T to SIRM, which is an indicator of low coercivity content） of the sediments are smaller than 0. 9, which implies a substantial amount of magnetic minerals with high coercivity. The existence of iron sulphide （ greigite or pyrrhotite） is revealed by representative susceptibility - temperature curves showing 200 350 ℃ Curie temperature in addition to 580 ℃ of magnetite, and also by awful smell during heating and dark heating products. Both the occurrence of authigenic iron sulphide and quick decrease of magnetic parameters near the surface clearly show that sediments from Core CSHI have undergone early diagenesis. The featureless magnetic changes of the whole core except for three tephras mean that the post-depositonal alteration is so strong that most original signals have been destroyed. For the same reason, the organic matter in sediment and sulphate in pore water must have been consumed along with dissolution, precipitation of iron and manganese happening sequencially during the redox reaction series. Great caution must be taken when using these altered chemical parameters for the interpretation of climatic changes.

关键词： northern Okinawa Trough gravity core of CSHI rock magnetic property characteristic tephra early diagenesis

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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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Magnetostratigraphy of borehole EY02-2 in the southern Yellow Sea and its paleoenvironmental significance

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Chinese Science Bulletin 2006年第7期51卷 855-865页

作者： ge shulan SHI Xuefa ZHU Rixiang LIU Yanguang YIN Ping LIU Lejun Key Lab of Marine Sedimentation and Environmental geology First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Institute of geology and geophysics Chinese Acadelny of Sciences Beijing 100029 China

Detailed rock magnetic and paleomag- netic studies have been undertaken on borehole EY02-2 (70m in length) in the southern Yellow Sea (SYS). The main Curie point revealed by magnetic susceptibility-temperature (k-T) curve is 580―600℃ indicating magnetite dominance. The hysteresis loop parameters show large variation of magnetic minera size in different sedimentary contexts: it is larger in subtidal sediment than in terrigenous sediment and even larger than in shallow sea sediment. This trend is correlative with distance to sediment source and dynamic strength. Magnetostratigraphic results show that the M/B polarity boundary (MBPB) is at 63.29m and there are at least 7 polarity transitions (Nr1-7) in Brunhes chron that can be tentatively correlated with 6 named polarity reversals. Three positive polarity reversals occur in late Matuyama chron and the early two may be the record of Kamikatsura happening in 886±3 kaB.P. Magnetic susceptibility (MS) and sediment grain size behave so differently in some sedimentary facies that certain big environmenta changes can be clearly revealed. generally, the MS and grain size of subtidal and terrigenous sediments are larger than shallow sea sediments and MS value around 10×10?5SI and mean grain size of 7Φ seems to be indicators of shallow sea sediments of deep water depth. However, the frequently used excellen climatic proxies such as MS and grain size in loess and deep sea sediments fail to record such climatic cycles revealed by oxygen isotope in continental seaThe various sediment sources, sedimentation dy- namic and their complex changes between glacial and interglacial periods should be the cause of fail- ure.

关键词：磁地层学钻井黄海岩石磁性 M/B极性边界磁化率

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Turbidite and bottom-current evolution revealed by anisotropy of magnetic susceptibility of redox sediments in the Ulleung Basin,Sea of Japan

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Chinese Science Bulletin 2012年第6期57卷 660-672页

作者： ge shulan SHI XueFa LIU YanGuang WANG KunShan ZOU JianJun DIAO JingYu ZHU ZhiWei WANG ChunJuan First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Affiliated Middle School of China Ocean University Qingdao 266003China

Anisotropy of magnetic susceptibility(AMS) from above and below 7.31 m in a core from the southern Ulleung Basin shows clear differences on an equal area projection of the lower *** concentrated steep inclination of K 3 and horizontal inclination of K 1 and K 2(K1 ≥K2 ≥K3) are located within the upper part,and the latter two axes lie perpendicular to each other near the bedding *** contrast,random distribution of the three axes and extremely high value of shape parameters(Q=(K1-K2)/[(K1+K2)/2-K3]) are evident in the lower part,indicating complete destruction of the original sedimentary *** result is consistent with data from X-radiographs,which show numerous conglomerates,distortions and cleavages in the lower *** to age models by Liu et al.(2010) and Zou et al.(2010),the bottom age at 7.31 m is 48 cal ka BP,and the time domain is discussed *** degree of AMS(P) is low,1-1.08,and linearly related to the foliation(F)(R2 =0.95,N=176).The relationship between F and linearity(L) implies oblate aligning patterns that are typically sedimentary in *** least five redox couplets were found with the aid of S ratios and other rock magnetic parameters,and in most cases,the original signals of climate survived early *** paleomagnetically reoriented AMS show corresponding changes with millennial events in the last 48 cal *** tilted K 3 directions and reduction of P and F occurred within DO1-BA warm events,when melt water pulse 1A nd the YD cold event took *** turbulent conditions therein,synchronous with coarsening of sediments,provide evidence of strong bottom currents and possible directional changes,as evidenced by different K3 tilting directions.A NE current direction in the last 4.5 cal ka is consistent with in situ measurements of bottom *** of AMS,mainly to climatic modulation,show on the one hand,the limited influence of diagenesis on rock magnetic signals and,on the other hand,the

关键词：磁化率各向异性电流方向氧化还原沉积物底部盆地日本海早期成岩作用

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Benthic foraminiferal δ^(13)C minimum events in the southeastern Okhotsk Sea over the last 180 ka

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Chinese Science Bulletin 2014年第15期59卷 3066-3074页

作者： Yonghua Wu Xuefa Shi Jianjun Zou Zhenbo Cheng Kunshan Wang shulan ge Fengdeng Shi State Key Laboratory of Marine geology Tongji University Key Laboratory of Marine Sedimentology and Environmental geology First Institute of Oceanography State Oceanic Administration

A total of six d13C minimum events,i.e.,VI,V,IV,III,II,and I,were observed via a stable carbon and oxygen isotope analysis of infaunal benthic foraminifera Uvigerina *** gravity core OS03-1 in the southeastern Okhotsk Sea over the last 180 *** events occurred at112–109,102–90,85–76,57–54,44–40,and 17–10 ka *** largest negative excursions reached 2.5%in event V and were greater than 1%in the other *** proposed that all d13C minimum events were caused by the increase in sea surface water productivity,the weakened formation of Okhotsk Sea intermediate water,and the enhancement of the oxygen minimum *** negative excursions were unaffected by methane hydrate destabilization and subsequent methane release based on the results obtained by using archaeal lipid markers.

关键词：鄂霍次克海底栖有孔虫东南部事件氧同位素分析甲烷水合物甲烷释放分解释放

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Growth ages of ferromanganese crusts from the western and central Pacific:Comparison between nannofossil analysis and ^(10)Be dating

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Chinese Science Bulletin 2006年第24期51卷 3035-3040页

作者： CHENG Zhenbo SHI Xuefa WU Yonghua SU Xin LI Xiaoyan WANG Kunshan YANG Yongliang ge shulan JU Xiaohua SHI Fengdeng M. Hiroyuki Key Laboratory of Marine Sedimentology and Environmental geology State Oceanic Administration Qingdao 266061 China Key Laboratory of Lithospheric Tectonic Deep-Level Process China National Research Center for geoanalysis Chinese Academy of Geological Sciences Beijing 100037 China Micro Analysis Laboratory Tandem Accelerator University of Tokyo Tokyo 113-0032 Japan

Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma.

关键词：太平洋中西部铁锰结壳微化石分析生长年代 10Be测年

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酶电极法测定乳酸钠注射液中L-乳酸钠的含量

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中国药学杂志 1998年第4期33卷 239-242页

作者：孙士青王宁葛淑兰山东省科学院生物研究所山东省卫生学校

目的：研究测定乳酸钠注射液中Ｌ乳酸钠含量的方法。方法：以固定化Ｌ乳酸氧化酶与Ｈ２Ｏ２电极构成酶电极，研究了乳酸（盐）酶电极分析法的各种分析条件及参数，并与非水滴定法对比测定了乳酸钠注射液中Ｌ乳酸钠及Ｄ，Ｌ外消... 详细信息

目的：研究测定乳酸钠注射液中Ｌ乳酸钠含量的方法。方法：以固定化Ｌ乳酸氧化酶与Ｈ２Ｏ２电极构成酶电极，研究了乳酸（盐）酶电极分析法的各种分析条件及参数，并与非水滴定法对比测定了乳酸钠注射液中Ｌ乳酸钠及Ｄ，Ｌ外消旋乳酸钠的含量。结果：供试乳酸钠注射液中Ｌ乳酸钠含量约占乳酸钠总量的１０％。结论：乳酸钠注射液属于不等量立体异构体药物。采用酶电极法测定乳酸钠注射液中的Ｌ乳酸钠含量具有专一性高、成本低、分析速度快等优点。

关键词： L-乳酸钠酶电极生物传感器乳酸钠注射液

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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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IODP341航次之阿拉斯加湾U1417站位磁性地层学研究

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第四纪研究 2017年第6期37卷 1334-1347页

作者：陈曦葛淑兰刘建兴杨刚海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所青岛266061 海洋地质过程与环境功能实验室青岛海洋科学与技术国家实验室青岛266061

本文运用系统的岩石磁学与古地磁学研究方法，对取自亚北极阿拉斯加湾的IODP 341航次U1417站位191.94m的综合岩芯进行了磁性地层学研究，揭示了湾内1.9Ma以来高沉积速率的年代地层框架。沉积物样品在交变退磁场下获得了稳定的剩磁方向... 详细信息

本文运用系统的岩石磁学与古地磁学研究方法，对取自亚北极阿拉斯加湾的IODP 341航次U1417站位191.94m的综合岩芯进行了磁性地层学研究，揭示了湾内1.9Ma以来高沉积速率的年代地层框架。沉积物样品在交变退磁场下获得了稳定的剩磁方向，并显示出4个正向极性段和3个负向极性段。结合IODP 341航次初步报告中古地磁和古生物的数据，确定了U1417综合岩芯的布容-松山极性转换界线（M/B：0.78Ma）位于钻孔110.46m，Jaramillo极性亚时、Cobb Mountain极性事件和Olduvai极性亚时的记录在岩芯中的深度分别对应133.28~139.91m、158.41~162.73m和182.67~191.94m。由上述年龄控制点推算出钻孔的沉积速率在1.2Ma以来显著上升，这可能与中更新世气候转型（MPT）所导致的源区侵蚀加剧有关。综上所述，该研究不仅为阿拉斯加湾深海沉积物研究提供了有效的年代学约束，也为更新世以来地层的进一步精细划分和对比提供了重要标尺。

关键词：阿拉斯加湾 IODP 341航次U1417站位 M/B磁极性转换界线极性亚时沉积速率

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进城务工子女的学校教育问题及对策研究

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科教导刊 2017年第1Z期 159-161页

作者：葛树兰安徽师范大学安徽芜湖241002

在城市化的进程中,越来越多的进城务工人员将子女随迁至城市学校就读,随着经济发展和社会结构不断的变化发展,进城务工子女的教育问题日益凸显。本文就此展开研究,从社会、家庭、学校及学生心理多角度进行讨论,通过综合比较和归因分析,... 详细信息

在城市化的进程中,越来越多的进城务工人员将子女随迁至城市学校就读,随着经济发展和社会结构不断的变化发展,进城务工子女的教育问题日益凸显。本文就此展开研究,从社会、家庭、学校及学生心理多角度进行讨论,通过综合比较和归因分析,在以生为本为原则,促进进城务工子女个性全面发展为前提下,提出了相应的建议。

关键词：进城务工子女学校教育问题分析思考对策

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