检索结果-南通市图书馆

同济大学学报（自然科学版） 1999年第3期27卷 366-370页

作者：董荣鑫同济大学海洋地质与地球物理系上海200092

依据苏北高邮凹陷戴南—三垛组岩芯中所见古生物化石，通过古生物生态组合的分析。

关键词：沉积环境古生物高邮凹陷戴南组三垛组苏北

半咸水介形虫Tanella opima Chen的种群动态研究

在线全文

学校读者我要写书评

暂无评论

微体古生物学报 1992年第3期9卷 235-242页

作者：赵泉鸿同济大学海洋地质系上海200092

上海芦潮港潮间带1982—1983.季节性沉积物样品中半咸水介形虫Tanella opima的种群动态调查表明,该种为多年生类型,其种群年龄和性比结构均具明显的季节性变化。繁殖活动受水温控制;4—10月产卵,水温不低于16℃;5—10月孵化,水温在20... 详细信息

上海芦潮港潮间带1982—1983.季节性沉积物样品中半咸水介形虫Tanella opima的种群动态调查表明,该种为多年生类型,其种群年龄和性比结构均具明显的季节性变化。繁殖活动受水温控制;4—10月产卵,水温不低于16℃;5—10月孵化,水温在20℃以上,种群在温暖季节(5—10月)由7个未成熟龄期的幼虫和成虫所组成,性比以雌性占优势;在寒冷季节(11—4月)则缺失前3.龄期的幼虫,性比以雄性为主。种群中最初2个龄期幼虫在母体壳内成长,这很可能是造成死种群和化石群中极少发现它们的原因。

关键词：介形虫丰满陈氏介种群动态

Southeastern extension of the Red River fault zone (RRFZ) and its tectonic evolution significance in western South china Sea

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2006年第8期49卷 839-850页

作者： LIU Baoming1,2,3. XIA Bin1, LI Xuxuan1,3. ZHANG Minqiang1,3. NIU Binhua2, ZHONG Lifeng1, JIN Qinghuan1,4 & JI Shaocheng1,5 1. Key laboratory of Marginal Sea geology and Resources, Chinese Academy of Sciences,Guangzhou 510640, china 2. china university of Geosciences (Beijing), Beijing 100083. china 3. Research Center of Science & Technology Department, CNOOC, Beijing 100027, china 4. Guangzhou marine Geological Survey, Ministry of Land & Resources, Guangzhou 510075, china 5. Ecole Polytechnique Montreal, H3.3.7, Canada Key laboratory of Marginal Sea geology and Resources Chinese Academy of Sciences Guangzhou China china university of Geosciences (Beijing) Beijing China Research Center of Science & Technology Department CNOOC Beijing China Guangzhou marine Geological Survey Ministry of Land & Resources Guangzhou China Ecole Polytechnique Montreal Canada

Recent geophysical surveys and basin modeling suggest that the No.1 fault in the Ying- gehai basin (YGHB) is the seaward elongation of the Red River fault zone (RRFZ) in the South china Sea (SCS). The RRFZ, which separates the South china and Indochina block, extends first along the Yuedong fault, offshore of Vietnam, and then continues southward and breaks off into two branches: the Lupar fault and the Tinjia fault. The southern extension of the Lupar fault dies out beneath the NW Borneo while the Tinjia fault extends southeast and reaches the Brunei-Sabah area. According to the gravity and geomagnetic data, and the tectonic evolution of the basins, there are different evolution histories between the Wan’an basin (WAB) and the basins in the Nansha block. The Tinjia fault may be the boundary between the Balingian block and the Nansha block. Hence, the line linking the Yue- dong fault and the Tinjia fault, which both are continental margin faults and strike-slip ones in the geological evolution histories, constitute the boundary between the Indochina and Nansha block. The Lupar fault, in contrast, is an intraplate fault within the Indochina block. The results provide new hints for reconstructing the tectonic evolution history of the RRFZ and the opening of the SCS, and also a framework for hydrocarbon prospecting in the region.

关键词： Red River fault zone, tectonic evolution, fault, extension, western South china Sea.

在线全文

学校读者我要写书评

暂无评论

古长江河口湾充填潮流作用机制的初步探讨

海洋学报 1999年第3期21卷 73-82页

作者：朱玉荣同济大学海洋地质与地球物理系上海200092

长江三角洲的发育是以古长江河日湾的充填来实现的．研究潮汐、潮流在古长江河口湾充填中所起的作用，可深入了解长江三角洲的形成发育过程．建立了渤海、黄海、东海的二维潮流数学模型，数值模拟了冰后期最大海侵，即现今长江三角洲地... 详细信息

长江三角洲的发育是以古长江河日湾的充填来实现的．研究潮汐、潮流在古长江河口湾充填中所起的作用，可深入了解长江三角洲的形成发育过程．建立了渤海、黄海、东海的二维潮流数学模型，数值模拟了冰后期最大海侵，即现今长江三角洲地区为巨大河口湾时的M2潮汐、潮流．在此基础上，计算了古长江河口湾及其周围海域8种粒径泥沙的潮平均悬移与推移输沙率，并根据输沙率散度的正负，划分了海底冲刷区与淤积区．根据计算结果得出，冰后期最大海侵时，存在大致以古长江河口湾湾口中点为腹点、波腹线向海凸起的独特驻潮波波腹区．在其控制下，外海潮流大致以古长江河口湾湾口中点为顶点作辐聚、辐散运动．在古潮流场作用下，经历每一个潮周期后，古长江河口湾周围海域的泥沙均向河口湾内净输运，并在河口湾内淤积．古长江河口湾的充填是在长江带来大量泥沙，外海的潮汐、潮流又有利于泥沙向河口湾内净输运，且在河口湾内沉积的情况下实现的．外海的潮汐、潮流为古长江河口湾的充填、长江三角洲的发育提供了必要而又有利的水动力环境．

关键词：海侵古长江河口湾潮流泥沙输运数值模拟

Dominant climate factors influencing the Arctic runoff and association between the Arctic runoff and sea ice

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2010年第5期29卷 10-20页

作者： LI Pixue ZHANG Zhanhai LIU Jiping Ocean university of china Qingdao 266100 China Polar Research Institute of china Shanghai 200136 China State Key laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China shanghai marine Environmental Monitoring and Forecasting Center Shanghai 200232 China

By using the Arctic runoff data from R-ArcticNET V4.0 and ArcticRIMS,trends of four major rivers flowing into the Arctic Ocean,whose climate factor plays an important role in determining the variability of the Arctic runoff,are *** results show that for the past 3. years,the trend of the Arctic runoff is seasonally *** is a significant trend in spring and winter and a significant decreasing trend in summer,leading to the reduced seasonal *** spring,surface air temperature is the dominant factor influencing the four *** summer,precipitation is the most important factor for Lena and Mackenzie,while snow cover is the most important factor for Yenisei and *** Mackenzie,atmospheric circulation does play an important role for all the seasons,which is not the case for the Eurasian *** authors further discuss the relationships between the Arctic runoff and sea *** negative correlation is found at the mouth of the rivers into the Arctic Ocean in spring,while significant positive correlation is observed just at the north of the mouths of the rivers into the Arctic in *** addition,each river has different relationship with sea ice in the eastern Greenland Sea.

关键词： Arctic runoff multiple linear regressions sea ice

在线全文

学校读者我要写书评

暂无评论

巴力—龙头山生物礁古油气藏的特征及成因

同济大学学报（自然科学版） 1999年第1期27卷 92-95页

作者：廖宗廷李光明同济大学海洋地质与地球物理系上海200092 同济大学化学系上海200092

在分析了广西大厂矿田巴力—龙头山生物礁古油气藏的构造背景和特征后 ,提出了该生物礁古油气藏的成因与泥盆纪海底热液活动密切相关、其破坏作用则归结于印支—燕山期的构造

关键词：生物礁古油气藏热液活动大厂矿田矿床

Spatial variations of tidal water level and their impact on the exposure patterns of tidal land on the central Jiangsu coast

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2010年第1期29卷 79-87页

作者： WANG Zhenyan GAO Shu HUANG Haijun Key laboratory of marine geology and Environment Chinese Academy of Sciences Qingdao 266071 China Graduate School Chinese Academy of Sciences Beijing 100039 China MOE Key laboratory for Coast and Island Development Nanjing University Nanjing 210093China

The exposed area of intertidal zone varies with tidal water level changes, If intercomparisons of satellite images are adopted as a method to determine geomorphological changes of the intertidal zone in response to accretion or erosion processes, then the effect of water level variations must be evaluated. In this study, two Landsat TM images overpassing the central Jiangsu coastal waters on 2 January and 7 March 2002, respectively, were treated by the changing detection analysis using Image Differencing and Post-classification Comparison. The simultaneous tide level data from four tide gauge stations along the coast were used for displaying the spatial variations of water levels and determining the elevations of waterlines. The results show that the spatial variations of water levels are highly significant in the central Jiangsu coastal waters. The huge differences of tidal land exposure patterns between the two imaging times are related mainly to the spatial variations of tidal water levels, which are controlled by the differences in tidal phases for different imaging times and the spatial variations of water level over the study area at each imaging time. Under complex tidal conditions, e.g., those of the central Jiangsu coastal waters, the tide-surge model should be used to eliminate effectively the effects of water level variations on remote sensing interpretation of geomorphological changes in the intertidal zone.

关键词： waterline water level variations exposure patterns central Jiangsu coast remote sensing

Animals and Mineralization of Phosphorus: Ore-Forming Mechanism of Insular Phosphorites

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1987年第1期 83-93+119页

作者： Wang Guozhong, Lu Bingquan and Quan Songqing marine Engineering and marine geology Institute,{3., shanghai

Phosphorite, or guano, or insular phosphorite, commonly containing 10-3.% P;O;, is one of the sources of phosphatic fertilizer. Taking the modern insular phosphorite on the Xisha Islands as an example. this paper discusses the ore-forming mechanism of phosphate and the important contribution made by animals to this *** phosphorite occurs in the middle part of carbonate sand cays of coral reef surrounded by longshore sandbanks, which assumes a dish-shape. The surface of the cays is covered by unconsolidated guano. The phosphorite, yellowish brown to dark brown, is made up of thick-bedded sand and gravel cemented by collophanite, and partly replaced by carbonate *** mechanism of mineralization is as follows:The average content of phosphorus in the sea water is only 0.07 ppm, but through the sea food chain concentration, phosphorus content may become higher. The phytoplanktons, as producers, suck up phosphorus out of sea water. The primary consumers, zooplanktons, obtain phosphorus by eating phytoplanktons, then they are followed by the second and third consumers. Sea birds living on fish, as the third consumers, concentrate and transport the phosphorus to the carbonate sand cays. Finally layers of guano are deposited under the *** the tropical climatic conditions with high temperature and plentiful rainfall soluble matters are leached out of the guano and infiltrated into deeper horizon. In alkaline groundwater with pH greater than 7.0. the phosphoritization takes place, bioclastics are cemented and replaced by collophanite or carbonate apatite. Finally, the phosphorus is fixed and phosphate formed.

关键词： Animals and Mineralization of Phosphorus Ore-Forming Mechanism of Insular Phosphorites

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

掺复合胶凝材料混凝土的抗氯离子侵蚀性能

同济大学学报（自然科学版） 2004年第4期32卷 490-493页

作者：施惠生王琼同济大学混凝土材料研究实验室上海200092

研究了矿粉、粉煤灰、硅灰等矿物外加剂对海工混凝土性能的影响,通过试验测定了掺复合胶凝材料的海工混凝土的电通量、氯离子表观扩散系数的变化规律,并对这种混凝土进行了恒电压钢筋锈蚀的试验,研究了矿物外加剂掺量与混凝土抗氯离子... 详细信息

研究了矿粉、粉煤灰、硅灰等矿物外加剂对海工混凝土性能的影响,通过试验测定了掺复合胶凝材料的海工混凝土的电通量、氯离子表观扩散系数的变化规律,并对这种混凝土进行了恒电压钢筋锈蚀的试验,研究了矿物外加剂掺量与混凝土抗氯离子侵蚀性能的关系.研究结果表明,在硅酸盐水泥中掺加矿粉、粉煤灰、硅灰等矿物外加剂可以改善海工混凝土的综合性能.矿物外加剂的复合掺入比单独掺入对混凝土抗氯离子侵蚀性能的改善具有更加良好的效果.海工混凝土配制时应尽可能地采用复合多种矿物外加剂.

关键词：海工混凝土水泥粉煤灰矿渣硅粉氯离子侵蚀电通量氯离子表观扩散系数

DISCOVERY OF DIATOM ASSEMBLAGES FROM DEEP-SEA BASIN IN THE SOUTH china SEA AND THEIR GEOLOGICAL IMPLICATION

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 1987年第2期6卷 215-221页

作者：王开发蒋辉冯文科 Department of marine geology tongji university shanghai South china Sea Headquaters of Geological Survey Ministry of geology and Mineral Resources Guangzhou

Of the diatoms from sediments of the South china Sea, mainly composed of planktonic species of tropical and subtropical zones, 3. genera and 86 species are identified. Based on the changes in diatom numbers and the appearance of diatom assemblages, six diatom zones are distinguished in Core V, reflecting six phases of paleoclimatc, paleo-watertemperature and paleogeography. According to the Quaternary climatic division, these zones represent hot weather and warm weather as a whole, and they are separately equal to postglacial period, the Holocene; Wurm glacial period; Riss-Wurm interglacial period; and Riss glacial period, the Late Pleistocene.

关键词： than more Th DISCOVERY OF DIATOM ASSEMBLAGES FROM DEEP-SEA BASIN IN THE SOUTH china SEA AND THEIR GEOLOGICAL IMPLICATION SEA