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Trends in Monthly Temperature and Precipitation Extremes in the Zhujiang River Basin,South China(1961-2007) 被引量:6
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作者 Thomas Fischer Marco Gemmer +1 位作者 Lliu Liu Buda Su 《Advances in Climate Change Research》 SCIE 2010年第2期63-70,共8页
Monthly temperature and precipitation time-series for the Zhujiang River Basin are analyzed in order to identify changes in climate extremes. Daily temperature and precipitation data from 1961 to 2007 of 192 meteorolo... Monthly temperature and precipitation time-series for the Zhujiang River Basin are analyzed in order to identify changes in climate extremes. Daily temperature and precipitation data from 1961 to 2007 of 192 meteorological stations are used. Two temperature indicators (monthly mean and monthly maximum mean) and three precipitation indicators (monthly total, monthly maximum consecutive 5-day precipitation, and monthly dry days) are analyzed. Tendencies in all five indicators can be observed. Many stations show significant positive trends (above the 90% confidence level) for monthly mean temperatures and monthly maximum mean temperatures. For all months, a significant increase in temperature from 1961 to 2007 can be observed in the entire basin with the coastal area in particular. Positive trends of precipitation extremes can be observed from January to March. Negative trends are detected from September to November. The number of dry days in October increased significantly at 40% of all meteorological stations. Stations with changes of monthly precipitation extremes are scattered over the Zhujiang River Basin. An aggregation of heat waves and droughts can be detected which is accompanied by significant increases of temperature extremes and the negative tendencies in precipitation extremes. The detection of tendencies in climate station density. extremes essentially relies on a good data quality and high 展开更多
关键词 temperature PRECIPITATION EXTREMES zhujiang river basin China
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Responses of Hydrological Processes to Climate Change in the Zhujiang River Basin in the 21st Century 被引量:3
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作者 LIU Lü-Liu JIANG Tong +2 位作者 XU Jin-Ge ZHAI Jian-Qing LUO Yong 《Advances in Climate Change Research》 2012年第2期84-91,共8页
In this study, discharge at the outlet of Xijiang River, the biggest sub-basin of the Zhujiang River, was simulated and projected from 1961 to 2099 using the hydrological model HBV-D. The model uses precipitation and ... In this study, discharge at the outlet of Xijiang River, the biggest sub-basin of the Zhujiang River, was simulated and projected from 1961 to 2099 using the hydrological model HBV-D. The model uses precipitation and temperature data from CISRO/MK3 5, MPI/ECHAM5, and NCAR/CCSM3 under three greenhouse gas emission scenarios (SRES A2, A1B, B1). The results in water resources and flood frequency suggest that annual precipitation and annual runoff would increase after 2050 relative to the reference period of 1961-1990. In addition, increasing trends have been projected in area averaged monthly precipitation and runoff from May to October, while decreasing trends in those from December to February. More often and larger floods would occur in future. Potential increase in runoff during the low-flow season could ease the pressure of water demand until 2030, but the increase in runoff in the high-flow season, with more often and larger floods, more pressure on flood control after 2050 is expected. 展开更多
关键词 zhujiang river basin hydrological model HBV-D FLOOD low flow PROJECTION
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Characteristics of transfer zones under the influence of preexisting faults and regional stress transformation:Wenchang A subsag,Zhujiang River Mouth Basin,northern South China Sea
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作者 Wei LI Mingyue CAO +7 位作者 Meifang MENG Caiwei FAN Hui LI Jia LI Wanqiu WU Ruiqing QIN Xingan LI Yiming LIU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2024年第3期744-759,共16页
A transfer zone in rift basins preserves important information on regional tectonic evolution and plays significant roles in hydrocarbon accumulation.Based on the systematic analysis of 3D seismic data and hydrocarbon... A transfer zone in rift basins preserves important information on regional tectonic evolution and plays significant roles in hydrocarbon accumulation.Based on the systematic analysis of 3D seismic data and hydrocarbon accumulation conditions,the geometry,kinematics,and reservoir control of a large synthetic overlapping transfer zone in the south of the Wenchang A subsag in the Zhujiang(Pearl)River Mouth basin were investigated.Results indicate that the development and evolution of the transfer zone was controlled by the interaction between pre-existing faults and regional stress transformation.The intense rifting of the main faults of the transfer zone controlled the development of source rocks and faultcontrolled slope break paleogeomorphology.The strike-slip overprint since the Oligocene is conducive to the formation of a large-scale fault-anticline trap,and the secondary faults in the transfer zone contribute to the hydrocarbon transportation.The conjugate intersection area of the NE-and NW-trending faults offers more opportunity for hydrocarbon migration and accumulation. 展开更多
关键词 transfer zone pre-existing fault regional stress transformation CENOZOIC Wenchang A Subsag zhujiang(Pearl)river Mouth basin
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The Cenozoic activities of Yangjiang-Yitongdong Fault: insights from analysis of the tectonic characteristics and evolution processes in western Zhujiang(Pearl) River Mouth Basin 被引量:10
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作者 Yuhan Li Rongwei Zhu +2 位作者 Hailing Liu Xuelin Qiu Haibo Huang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第9期87-101,共15页
The Yangjiang-Yitongdong Fault (YJF) is an important NW-trending regional fault, which divides the Zhujiang (Pearl) River Mouth Basin (ZRMB) into western and eastern segments. In Cenozoic, the northern continental mar... The Yangjiang-Yitongdong Fault (YJF) is an important NW-trending regional fault, which divides the Zhujiang (Pearl) River Mouth Basin (ZRMB) into western and eastern segments. In Cenozoic, the northern continental margin of the South China Sea (SCS) underwent continental rifting, breakup, seafloor spreading and thermal subsidence processes, and the Cenozoic activities of YJF is one part of this series of complex processes. Two long NW-trending multichannel seismic profiles located on both sides of the YJF extending from the continental shelf to Continent-Ocean Boundary (COB) were used to study the tectonic and sedimentary characteristics of western ZRMB. Using the 2D-Move software and back-stripping method, we constructed the balance cross-section model and calculated the fault activity rate. Through the comprehensive consideration of tectonic position, tectonic evolution history, featured structure, and stress analysis, we deduced the activity history of the YJF in Cenozoic. The results showed that the YJF can be divided into two segments by the central uplift belt. From 65 Ma to 32 Ma, the YJF was in sinistral motion as a whole, inherited the preexisting sinistral motion of Mesozoic YJF, in which, the southern part of YJF was mainly in extension activity, controlling the formation and evolution of Yunkai Low Uplift, coupled with slight sinistral motion. From 32 Ma to 23.8 Ma, the sinistral motion in northern part of YJF continued, while the sinistral motion in southern part began to stop or shifted to a slightly dextral motion. After 23.8 Ma, the dextral motion in southern part of YJF continued, while the sinistral motion in northern part of YJF gradually stopped, or shifted to the slightly dextral motion. The shift of the YJF strike-slip direction may be related to the magmatic underplating in continent-ocean transition, southeastern ZRMB. According to the analysis of tectonic activity intensity and rift sedimentary structure, the activities of YJF in Cenozoic played a regulating role in the rift extension process of ZRMB. 展开更多
关键词 Yangjiang-Yitongdong FAULT zhujiang (Pearl) river Mouth basin TECTONIC evolution STRIKE slip movement CENOZOIC
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Geochemistry of borehole cutting shale and natural gas accumulation in the deepwater area of the Zhujiang River Mouth-Qiongdongnan Basin in the northern South China Sea 被引量:3
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作者 GAO Gang ZHANG Gongcheng +3 位作者 CHEN Guo GANG Wenzhe SHEN Huailei ZHAO Ke 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2018年第2期44-53,共10页
The Qiongdongnan Basin and Zhujiang River(Pearl River) Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact... The Qiongdongnan Basin and Zhujiang River(Pearl River) Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact of oil-base mud on TOC content and Rock-Eval parameters of cutting shale samples, the authors did comprehensive analysis of source rock quality, thermal evolution and control effect of source rock in gas accumulation of the Qiongdongnan and the Zhujiang River Mouth Basins. The contrast analysis of TOC contents and Rock-Eval parameters before and after extraction for cutting shale samples indicates that except for a weaker impact on Rock-Eval parameter S2, oil-base mud has certain impact on Rock-Eval S1, Tmax and TOC contents. When concerning oil-base mud influence on source rock geochemistry parameters, the shales in the Yacheng/Enping,Lingshui/Zhuhai and Sanya/Zhuhai Formations have mainly Type Ⅱ and Ⅲ organic matter with better gas potential and oil potential. The thermal evolution analysis suggests that the depth interval of the oil window is between 3 000 m and 5 000 m. Source rocks in the deepwater area have generated abundant gas mainly due to the late stage of the oil window and the high-supper mature stage. Gas reservoir formation condition analysis made clear that the source rock is the primary factor and fault is a necessary condition for gas accumulation. Spatial coupling of source, fault and reservoir is essential for gas accumulation and the inside of hydrocarbon-generating sag is future potential gas exploration area. 展开更多
关键词 cutting shale organic geochemistry gas accumulation deepwater area Qiongdongnan basin zhujiang river Mouth basin
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Deep-water Depositional Features of Miocene Zhujiang Formation in Baiyun Sag,Pearl River Mouth Basin 被引量:4
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作者 LI Yun ZHENG Rongcai +3 位作者 YANG Baoquan ZHU Guojin GAO Boyu HU Xiaoqing 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2013年第1期197-210,共14页
Eleven lithofacies and five lithofacies associations were indentified in the Miocene Zhujiang Formation on the basis of detailed core analysis. It could he determined that three depositional types developed, namely su... Eleven lithofacies and five lithofacies associations were indentified in the Miocene Zhujiang Formation on the basis of detailed core analysis. It could he determined that three depositional types developed, namely submarine fan, basin and deep-water traction current. Six microfacies were further recognized within the fan, including main channels in the inner fan, distributary channels in the middle fan, inter-channels, levees and the outer fan. The lower Zhujiang Formation, mainly sandstone associations, was inner fan and inner-middle fan deposits of the basin fan and the slope fan. The middle part, mainly mudstone associations, was outer fan deposits. With the transgression, the submarine fan was finally replaced by the basinal pelagic deposits which were dominated by mudstone associations, siltstone associations, and deep-water limestone associations. During the weak gravity flow activity, the lower channels, the middle-upper outer fans and basin deposits were strongly modified by the deep-water traction current. The identification of the deep-water traction deposition in Miocene Zhujiang Formation would be of great importance. It could be inferred that the deep- water traction current had been existing after the shelf-break formation since the Late Oligocene (23.8 Ma) in the Baiyun sag, influencing and controlling the sediment composition, the distribution, and depositional processes. It would provide great enlightenment to the paleo-oceanic current circulation in the northern South China Sea. 展开更多
关键词 northern South China Sea Pearl river Mouth basin Baiyun Sag zhujiang Formation submarine fan
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Riverine carbon fluxes and soil erosion in the Zhujiang(Pearl)River Drainage Basin, South China
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作者 Xiuguo WEI Fushun WANG 《Chinese Journal Of Geochemistry》 EI CAS 2006年第B08期276-276,共1页
关键词 珠江 同位素 酸性排水 水土流失
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Astronomical influence of the development of Paleogene thin coal seam groups in offshore Lacustrine basins:A case study of the ZhuⅠDepression's Enping Formation located in the northern South China Sea
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作者 Yan Liu Shengbing Huang +4 位作者 Dongdong Wang Nan Li Yuting Yin Ying Chen Zengxue Li 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2024年第4期136-150,共15页
The development of the Paleogene coal seams in China's offshore basin areas generally had the characteristics of coal measures with large thicknesses,large numbers of coal seams,thin single coal seams,poor stabili... The development of the Paleogene coal seams in China's offshore basin areas generally had the characteristics of coal measures with large thicknesses,large numbers of coal seams,thin single coal seams,poor stability,scattered vertical distribution,and a wide distribution range.This study selected the Enping Formation of the ZhuⅠDepression in the northern section of the South China Sea as an example to determine the macro-control factors of the development of the Paleogene coal seam groups.An analysis was carried out on the influencing effects and patterns of the astronomical cycles related to the development of the thin coal seam groups in the region.A floating astronomical time scale of the Enping Formation was established,and the sedimentary time limit of the Enping Formation was determined to be approximately 6.15 Ma±.In addition,the cyclostratigraphy analysis results of the natural gamma-ray data of Well XJ in the Enping Formation of the Xijiang Sag revealed that the development of the thin coal seams had probably been affected by short eccentricity and precession factors.The formation process of coal seams was determined to have been affected by high seasonal contrast,precipitation,and insolation.During the periods with high values of short eccentricity,the seasonal contrasts tended to be high.During those periods,fluctuations in the precession controls resulted in periodic volume changes in precipitation and insolation of the region,resulting in the development of thin coal seams.It was also found that the periods with low precession were the most conducive to coal seam development.On that basis,combined with such factors as sedimentary environmental conditions conducive to the development of thin coal seam groups,this study established a theoretical model of the comprehensive influences of short eccentricity and precession on the development and distribution of Paleogene thin coal seam groups in offshore lacustrine basins.The patterns of the Paleogene astronomical periods and paleoclimate evolution,along with the control factors which impacted the development of thin coal seam groups in offshore lacustrine basins,were revealed. 展开更多
关键词 PALEOGENE Pearl(zhujiang)river Mouth basin coal seam development astronomical cycles
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珠三坳陷珠江组一段沉积体系演化过程及其控制因素 被引量:1
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作者 吴太霏 王华 +6 位作者 刘恩涛 陈林 张璐 陈思 谢卫东 谷志宇 张启扬 《地质科技通报》 CAS CSCD 北大核心 2024年第2期111-122,共12页
珠江组一段沉积时期是珠三坳陷沉积体系演变的重要时期,由早期的大范围三角洲沉积体系演化为晚期的浅海陆架沉积体系,对其演化过程及控制因素展开研究,不仅有利于揭示海侵过程中沉积体系演化过程,而且对浅海陆架有利沉积相带预测具有指... 珠江组一段沉积时期是珠三坳陷沉积体系演变的重要时期,由早期的大范围三角洲沉积体系演化为晚期的浅海陆架沉积体系,对其演化过程及控制因素展开研究,不仅有利于揭示海侵过程中沉积体系演化过程,而且对浅海陆架有利沉积相带预测具有指导意义。综合利用岩心、测井以及高分辨率三维地震资料,建立了珠三坳陷珠江组一段四级层序地层格架,通过地质-地球物理结合方法查明了珠江组一段沉积体系的时空演化特征,并讨论了沉积演化的主控因素。研究表明:珠三坳陷珠江组一段可划分为PS1、PS2、PS3、PS4共4个四级层序。PS3和PS4时期主要发育三角洲前缘沉积,具有水下分流河道、分流间湾、河口坝和远砂坝等沉积微相组合;PS1和PS2时期以浅海陆架沉积体系大规模发育为特征,在研究区西部发育潮流砂脊,东部发育滨外砂坝。珠三坳陷沉积体系的平面展布以及垂向演化受相对海平面变化、物源供给强度、构造沉降与古地貌等综合控制。水下分流河道、潮流砂脊与滨外砂坝等微相砂岩占比高且物性好,为油气储集的有利沉积相带。 展开更多
关键词 沉积体系 控制因素 珠江组一段 珠三坳陷 珠江口盆地 浅海陆架 层序地层
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珠江口盆地中北部中新统珠江组浪控三角洲沉积时空演化模拟
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作者 杨慧玲 张青青 +4 位作者 衡立群 王健 刘太勋 刘建良 刘可禹 《海相油气地质》 CSCD 北大核心 2024年第3期291-302,共12页
基于沉积背景、高分辨率层序地层格架及沉积微相展布分析,应用沉积正演模拟方法,综合利用地震、测井、岩心等资料,开展沉积作用和沉积过程的三维时空演化模拟,定量恢复了珠江口盆地中北部中新统珠江组浪控三角洲沉积演化过程,探讨了沉... 基于沉积背景、高分辨率层序地层格架及沉积微相展布分析,应用沉积正演模拟方法,综合利用地震、测井、岩心等资料,开展沉积作用和沉积过程的三维时空演化模拟,定量恢复了珠江口盆地中北部中新统珠江组浪控三角洲沉积演化过程,探讨了沉积环境与波浪参数对砂体展布的影响。结果表明:(1)研究区珠江组沉积期的沉积微相随基准面的变化呈规律性演化,滨线呈现先向陆迁移、再向海迁移的趋势。(2)珠江组沉积期的波浪作用较强,波浪角度为近南东方向,波浪作用对三角洲砂体展布具有明显影响。随着波浪高度增加,波浪阻碍三角洲河口细粒沉积物堆积的作用增大,并将其搬运至深水区,泥质沉积物趋向沉积于波基面以下区域,波基面以上区域砂质碎屑含量较高。波浪作用入射角度发生倾斜,会导致三角洲在演化过程中产生不对称的沉积和形态。(3)有利储层砂体主要发育于滨岸线附近。沉积正演模拟为定量恢复沉积演化过程提供更为直观的方法,且在确定浪控三角洲潜在形态方面具有预测作用。 展开更多
关键词 浪控三角洲 沉积演化 正演模拟 珠江组 珠江口盆地
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珠江口盆地惠州北凹珠海组、珠江组储层发育特征及主控因素
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作者 张彦振 覃军 +4 位作者 蒋一鸣 姜勇 刘培 王辉 常文琪 《海相油气地质》 CSCD 北大核心 2024年第2期179-187,共9页
应用13口钻井的薄片鉴定、粒度分析、扫描电镜、锆石定年、物性等分析化验资料以及录井、测试资料,系统开展了惠州北凹珠海组、珠江组储层的发育特征、主控因素及商业产能下限研究。研究表明:(1)珠海组、珠江组发育大型海相三角洲—滨... 应用13口钻井的薄片鉴定、粒度分析、扫描电镜、锆石定年、物性等分析化验资料以及录井、测试资料,系统开展了惠州北凹珠海组、珠江组储层的发育特征、主控因素及商业产能下限研究。研究表明:(1)珠海组、珠江组发育大型海相三角洲—滨浅海沉积,储层主要为三角洲前缘水下分流河道中—粗粒洁净石英砂岩,其具有高成分成熟度和高结构成熟度,储集空间类型以原生粒间孔为主,局部富集次生溶孔、高岭石晶间孔,面孔率较高。(2)储层发育主要受“优质母源+有利相带+溶蚀作用”三元联控:研究区北部华南地块的变质岩+侵入岩作为优质母源决定了储层为石英含量高的砂岩类型,奠定了优质储层发育的基础;三角洲前缘主水道沉积水动力强,单砂体厚度大,砂岩粒度粗、泥质含量低,储层物性最好;建设性成岩作用(溶蚀作用)在一定程度上具有扩储增孔效应。(3)结合录井、测试资料确定惠州北凹油层的中—粗粒石英砂岩储层商业产能下限为3 800 m。 展开更多
关键词 储层特征 主控因素 珠海组 珠江组 惠州北凹 珠江口盆地
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珠江口盆地基底结构的综合地球物理研究 被引量:58
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作者 王家林 张新兵 +5 位作者 吴健生 陈冰 钟慧智 郝沪军 李平鲁 苏乃容 《热带海洋学报》 CAS CSCD 北大核心 2002年第2期13-22,共10页
通过对珠江口盆地重磁资料的分析处理及反演计算,依据盆地的地质、地球物理特征,采取了针对性的综合地球物理研究思路与方法,对地震资料难以解决的珠江口盆地基底结构进行了研究,确定了盆地的重力和磁性基底深度,并对盆地内的断裂... 通过对珠江口盆地重磁资料的分析处理及反演计算,依据盆地的地质、地球物理特征,采取了针对性的综合地球物理研究思路与方法,对地震资料难以解决的珠江口盆地基底结构进行了研究,确定了盆地的重力和磁性基底深度,并对盆地内的断裂和基底岩性作了推断,提供了新的认识,为今后研究提供了依据。 展开更多
关键词 珠江口盆地 基底结构 综合地球物理研究 重磁资料 地质 地震资料
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珠江口盆地中新生代主要断裂特征和动力背景分析 被引量:91
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作者 陈汉宗 吴湘杰 +2 位作者 周蒂 王万银 郝沪军 《热带海洋学报》 CAS CSCD 北大核心 2005年第2期52-61,共10页
对新处理及新采集的地质地球物理资料进行综合分析,结合前人研究成果,编制了中生代和新生代珠江口盆地主要断裂图,讨论了主要断裂的存在证据、展布形态、活动性质以及它们与盆地各级构造发育的关系等基本特征,并初步分析了它们形成演化... 对新处理及新采集的地质地球物理资料进行综合分析,结合前人研究成果,编制了中生代和新生代珠江口盆地主要断裂图,讨论了主要断裂的存在证据、展布形态、活动性质以及它们与盆地各级构造发育的关系等基本特征,并初步分析了它们形成演化的地球动力学背景。珠江口盆地断裂主要由NEE向和NW向断裂组组成,其次为NWW向断裂组和NE向断裂组。中生代西太平洋俯冲带呈NE SW向穿过南海东北部,相伴的有NE向火山弧、弧前盆地等压性构造和NW向左行走滑断裂,构成左行压扭体系。晚白垩纪至新生代NEE及NWW向断裂带控制了大规模张裂和沉积盆地的形成,又被NW向断裂带错切,形成了南北分带、东西分块的构造格局,显示了右行张扭应力场特征。 展开更多
关键词 断裂 地质构造 地球物理 珠江口盆地 南海
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21世纪珠江流域水文过程对气候变化的响应 被引量:16
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作者 刘绿柳 姜彤 +2 位作者 徐金阁 翟建青 罗勇 《气候变化研究进展》 CSCD 北大核心 2012年第1期28-34,共7页
应用HBV-D水文模型和多个气候模式预估了不同温室气体排放情景下珠江主干流西江的径流过程,分析了21世纪水资源量和洪水频率的变化。结果表明:2050年后年降水量和年径流量较基准期(1961—1990年)明显增加;流域平均的月降水量和径流量在5... 应用HBV-D水文模型和多个气候模式预估了不同温室气体排放情景下珠江主干流西江的径流过程,分析了21世纪水资源量和洪水频率的变化。结果表明:2050年后年降水量和年径流量较基准期(1961—1990年)明显增加;流域平均的月降水量和径流量在5—10月间均呈增加趋势,12月至次年2月呈减少趋势;年最大1 d和7 d洪量逐渐增加,重现期逐渐缩短。2030年前枯水期径流增加有望缓解枯水期用水压力,而2050年之后丰水期径流量以及洪水强度、发生频率的增加将给珠江流域防汛抗洪带来更大压力,在制订气候变化对流域水资源影响适应性对策时应考虑这两方面的影响。 展开更多
关键词 珠江流域 HBV-D水文模型 洪水 枯水 预估
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珠江口盆地白云凹陷断裂构造特征及其活动期次 被引量:28
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作者 孙龙涛 周蒂 +2 位作者 陈长民 詹文欢 孙珍 《热带海洋学报》 CAS CSCD 北大核心 2008年第2期25-31,共7页
对白云凹陷地震资料的解释分析表明,该凹陷断裂构造以正断层和走滑断裂为主,未见逆断层。在平面上,断裂主要为NWW至近EW走向,不同等级与不同走向断层表现为平行断层系、帚状断层系和雁列断层系等三种断层组合形式。剖面中,单条断层样式... 对白云凹陷地震资料的解释分析表明,该凹陷断裂构造以正断层和走滑断裂为主,未见逆断层。在平面上,断裂主要为NWW至近EW走向,不同等级与不同走向断层表现为平行断层系、帚状断层系和雁列断层系等三种断层组合形式。剖面中,单条断层样式相对简单,主要呈现平面式、铲式和座椅式等构造样式;多条断层主要表现为花状组合、马尾状组合、Y字型组合和阶梯状组合等构造特征。通过对断裂活动强度统计发现,不同区域断裂的发育时间和发育强度亦有差异,其中50—30MaBP是断裂的强烈发育期,控制凹陷的同张裂期沉积充填;13.8—10MaBP受东沙运动的影响断裂再次活化,属于中等强度发育期。 展开更多
关键词 白云凹陷 珠江口盆地 断裂 构造活动
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白云凹陷地球物理场及深部结构特征 被引量:23
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作者 吴湘杰 周蒂 +2 位作者 庞雄 郝沪军 申俊 《热带海洋学报》 CAS CSCD 北大核心 2005年第2期62-69,共8页
珠江口盆地白云凹陷是南海最具代表性的第三系深水陆坡沉积区。以穿过白云凹陷中部的一条深反射地震剖面(14s)为研究基础,采用综合地球物理研究方法分析了该区地球物理场特征,根据重力异常平面等值线勾画了白云凹陷的形态,并提取该测线... 珠江口盆地白云凹陷是南海最具代表性的第三系深水陆坡沉积区。以穿过白云凹陷中部的一条深反射地震剖面(14s)为研究基础,采用综合地球物理研究方法分析了该区地球物理场特征,根据重力异常平面等值线勾画了白云凹陷的形态,并提取该测线相对应的重磁剖面数据,利用重磁资料和地震剖面进行了综合反演。以深剖面地震资料建立了地质模型,利用所得的重力数据进行了研究深部结构的正演拟合,实测与计算值拟合较好,支持中生代俯冲洋壳存在的观点;同时结合地震资料对深部结构进行了分析,该区莫霍面由陆向海抬升,呈阶梯状变化,地壳厚度逐渐减薄,具有大陆边缘陆壳向洋壳过渡的特征。根据地质模型还进行了变密度综合反演拟合来分析基底岩性特征,该区基底主要为中酸性岩浆岩,部分为变质岩和基性火山岩,岩石密度由陆向洋逐渐减小,磁性体分布不均。 展开更多
关键词 白云凹陷 珠江口盆地 地球物理场 地壳结构
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珠江口盆地东沙隆起的沉降史及其动力机制 被引量:17
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作者 刘安 吴世敏 程卫华 《海洋学报》 CAS CSCD 北大核心 2011年第6期117-124,共8页
根据东沙隆起及其周围钻井资料的一维构造沉降对比分析,结合前人在基底、盖层及断裂等方面的研究,将东沙隆起地区的构造演化分为5个阶段:白垩纪挤压阶段、古新世-早渐新世伸展断陷阶段、早渐新世末期抬升剥蚀阶段、晚渐新世-中新世快速... 根据东沙隆起及其周围钻井资料的一维构造沉降对比分析,结合前人在基底、盖层及断裂等方面的研究,将东沙隆起地区的构造演化分为5个阶段:白垩纪挤压阶段、古新世-早渐新世伸展断陷阶段、早渐新世末期抬升剥蚀阶段、晚渐新世-中新世快速的裂后沉降阶段、晚中新世以来断块升降阶段。认为下地壳高速层是促使早渐新世末期抬升剥蚀的重要因素,而与高磁异常带、磁静区没有密切的联系。 展开更多
关键词 南海 珠江口盆地 东沙隆起 构造沉降 动力机制
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珠江口盆地白云凹陷珠江组深水牵引流沉积特征及其地质意义 被引量:15
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作者 李云 郑荣才 +1 位作者 朱国金 胡晓庆 《海洋学报》 CAS CSCD 北大核心 2012年第1期127-135,共9页
研究深水牵引流对古大洋环流重建、陆坡位置判断及沉积矿产和能源资源勘探具有重要意义。珠江口盆地白云凹陷中新统珠江组取心段发育丰富的、与远洋低密度浊流和半远洋-远洋悬移沉积有明显区别的深水牵引流沉积,产物包括平行层理细砂岩... 研究深水牵引流对古大洋环流重建、陆坡位置判断及沉积矿产和能源资源勘探具有重要意义。珠江口盆地白云凹陷中新统珠江组取心段发育丰富的、与远洋低密度浊流和半远洋-远洋悬移沉积有明显区别的深水牵引流沉积,产物包括平行层理细砂岩、双泥岩纹层、双向交错层粉-细粒砂岩、波状层理和脉状层理灰质粉-细粒砂岩、波状层理和脉状层理抱球虫灰岩、透镜状沙纹层理粉砂岩等岩石相类型。珠江组深水牵引流沉积的发现具有重要地质意义,由其可以推测自渐新世末(23.8Ma)白云凹陷陆架坡折带形成之后就开始存在沿着陆架坡折带活动的深水牵引流,并可能影响和改变沉积物的物质组成和区域分布,这将为南海北部古大洋洋流循环重建起到重要启示作用。 展开更多
关键词 珠江口盆地 白云凹陷 中新统 珠江组 深水扇 深水牵引流
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浅海陆棚环境的层序地层学研究 被引量:3
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作者 刘豪 王英民 +1 位作者 王媛 张哨楠 《沉积与特提斯地质》 CAS CSCD 2001年第2期31-38,共8页
对于海相沉积盆地而言 ,在一个三级海平面变化周期内形成的层序 ,具有全球可对比性的等时地层单元 ,跨时约 0 .3~ 3Ma。在三维高分辨率地震、岩心和测井解释资料基础之上 ,通过岩石地层旋回特征、可容空间以及层序地层关键界面识别 ,... 对于海相沉积盆地而言 ,在一个三级海平面变化周期内形成的层序 ,具有全球可对比性的等时地层单元 ,跨时约 0 .3~ 3Ma。在三维高分辨率地震、岩心和测井解释资料基础之上 ,通过岩石地层旋回特征、可容空间以及层序地层关键界面识别 ,将珠江口盆地渐新世晚期的珠海组二段分为S1和S2 两个三级层序。由于坳陷处于浅海陆棚环境 ,每个层序中的低水位体系域不发育 ,局部以受断层控制的水下峡谷充填为特征。 展开更多
关键词 珠江口盆地 构造层序 Fischer曲线 层序地层学 海相沉积盆地 浅海陆棚环境
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珠江口盆地(东部)珠江组碳酸盐岩层序地层及储层分布 被引量:16
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作者 黄海平 傅恒 +1 位作者 周小康 朱焕 《沉积学报》 CAS CSCD 北大核心 2012年第2期291-300,共10页
以层序地层学理论为指导,运用岩芯观察及薄片鉴定、测井、录井、地震及其古生物等资料对珠江口盆地(东部)珠江组碳酸盐岩进行层序地层研究,共识别出5个三级层序界面和4个三级层序,各三级层序界面均是Vail的Ⅱ类层序界面的具体表现,建立... 以层序地层学理论为指导,运用岩芯观察及薄片鉴定、测井、录井、地震及其古生物等资料对珠江口盆地(东部)珠江组碳酸盐岩进行层序地层研究,共识别出5个三级层序界面和4个三级层序,各三级层序界面均是Vail的Ⅱ类层序界面的具体表现,建立了珠江组碳酸盐岩的层序地层格架。在层序地层研究的基础上,对碳酸盐岩储层的时空分布进行了系统研究,储层主要发育在三级层序高位体系域。结果表明:有利储集相带分布于流花地区SQ3-HST台地边缘礁及生屑滩,较有利储集相带分布于惠州地区SQ1-HST、SQ2-HST台地边缘礁、生屑滩或台内点礁、生屑滩,以及陆丰地区SQ1-HST台内点礁、生屑滩。 展开更多
关键词 珠江口盆地 珠江组 碳酸盐岩 层序地层 储层
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