朝鲜半岛的历史地震资料   总被引：1，自引：0，他引：1  

吴戈 《东北地震研究》1994,(1)

朝鲜半岛历史悠久．整理朝鲜半岛地震史料表明，从公元１３年至１９４５年，在半岛上曾经发生过２０７０次历史地震，可堪称是个多地震的地区．这些历史地震资料，对于分析研究中朝邻近地区及其海域的地震活动可能具有很大的参考意义．  相似文献   

Helium and Argon Isotopes of the Tertiary Volcanic Rocks, Shandong Peninsula：Significance for Crust-Mantle Circulation     

Tang Huayun State Key Lab of Geological Processes  Mineral Resources  China University of Geosciences  Wuhan  China  Faculty of Earth Sciences  China University of Geosciences  Wuhan  China Yu Chunmei Faculty of Earth Sciences  China University of Geosciences  Wuhan  China 《中国地质大学学报(英文版)》2005,16(1):24-28

Noble gases have successfully been used to con strain the mantle structure (Allegre et al., 1983),discuss mantle heterogeneity (Ma and Tao, 2002),determine different mantle source components and soon, because of their chemical inertia and isotopicfractionation during the evolution of the earth. Het erogeneities of the subcontinental mantle beneatheastern China have been confirmed by abundant stud ies of mantle magmas and xenoliths, in mineralogy,petrology and isotop…  相似文献   

Sr, Nd and Pb Isotopic Systematics of the Cenozoic Basalts of the Korean Peninsula and Their Implications for the Permo-Triassic Continental Collision Boundary     

Kye-Hun Park  Jun-Beom Park  Chang-Sik Cheong  Chang Whan Oh 《Gondwana Research》2005,8(4):529-538

Sr, Nd and Pb isotopic compositions of the Cenozoic basalts were analyzed from Baengnyeongdo Island, Jeongok, Ganseong, and Jejudo Island of Korea. They reveal relatively enriched Sr and Nd isotopic compositions (⁸⁷Sr/⁸⁶Sr = 0.703300.70555, ¹⁴³Nd/¹⁴⁴Nd = 0.512980.51256) compared with MORB.²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb values of all the analyzed Korean basalts lie above the Northern Hemisphere Reference Line (NHRL) defined by Hart (1984). Pb isotopic compositions of basalts from Jejudo Islands (²⁰⁶Pb/²⁰⁴Pb = 18.6119.12, ²⁰⁷Pb/²⁰⁴Pb = 15.5415.69, ²⁰⁸Pb/²⁰⁴Pb = 38.9839.72) are significantly more radiogenic than the rest (²⁰⁶Pb/²⁰⁴Pb = 17.7218.03, ²⁰⁷Pb/²⁰⁴Pb = 15.4415.58, ²⁰⁸Pb/²⁰⁴Pb = 37.7738.64). The Cenozoic Korean basalts thus can be divided into two groups based on their Sr, Nd and Pb isotopic compositions. The north group reveals mixing between DMM and EM1 while the south group displays DMM-EM2 mixing. Such a distribution is the same as Chinese Cenozoic basalts and it can be interpreted that the subcontinental lithospheric mantle under Korea represents simple lateral continuation of the South and North China Blocks. We suggest that Korean continental collision zone cross the Korean Peninsula through the region between the north and south basalt groups of Korea.  相似文献   

影响辽东半岛的热带气旋降水分析   总被引：5，自引：4，他引：5  

梁军  陈联寿  李英  王秀萍 《热带气象学报》2006,22(1):41-48

选取移动路径和转向趋势极为相似的两个热带气旋——9711（Winnie）和9406（Tim）为例，对其路径、降水量、移动速度进行对比分析，结果表明，Winnie路径偏东，转向后移动速度增幅大，在辽东半岛地区的降水量大；Tim路径偏西，转向后移动速度增幅小，强降水偏西。并针对其在辽东半岛造成的降水量的差异，采用NCEP全球分析资料，诊断分析其环境流场和结构特征，分析表明，除了地形和海洋的影响，副热带高压位置、高低空急流和锋区与辽东半岛地区的强降水有直接关系。Winnie影响期间，有利、稳定的副高位置使来自东南和西南的暖湿空气输送到辽东半岛上空，并阻挡着低压系统东移出海，使降水持续增加；高低空急流在高空急流人口区上升支环流圈内耦合，对流层上层强辐散场的抽吸作用及高位涡的向下输送，有利于气旋的发展加强；东、西两侧冷空气作用使其变性加强，形成温带气旋，引起强降水。Tim影响期问，副高中心偏西、偏北，高低空急流在高空急流出口区下沉支环流圈内相互作用，其上空辐散强度较弱，只是Winnie的八分之一，不利于气旋的发展加强；Tim位于高空槽后，获得负涡度平流，在东部弱冷空气作用下，引起台风弱变性，并没有形成气旋，在东北地区被西风槽合并后消失，辽东半岛只出现10mm以下的降水。  相似文献   

THE ANALYSIS OF TROPICAL CYCLONE PRECIPITATION AFFECTING THE LIAODONG PENINSULA     

LIANG Jun  CHEN Lian-shou  WANG Shi-gong 《热带气象学报(英文版)》2006,12(1)

1 INTRODUCTION Tropical cyclones (TCs) moving north and getting to the Liaodong Peninsula and waters of the Yellow and Bohai Seas are in their late phase of life cycle.While weakening rapidly, TCs carry a large amount of warm and humid air that forms heavy rainfall by itself on the one hand and interact with westerlies in the middle latitudes on the other.  相似文献   

胶东半岛主要环境工程地质问题及防治对策研究   总被引：2，自引：1，他引：1  

李相然  张绍河 《地质灾害与环境保护》1998,9(4):42-47

胶东半岛为我国的工农业生产基地,在沿海经济发展战略中有着重地位。随着地区经济的蓬勃发展和对外开放的不断深入,胶东半岛也面临着日益严峻的环境工程地质问题,对胶东半岛主要环境工程地质问题进行系统研究,并提出综合防治对策与建议。  相似文献   

New and little known species of the genus Candona (Crustacea, Ostracoda) from Macedonia and other Balkan areas     

Trajan Petkovski  Burkhard Scharf  Dietmar Keyser   《Limnologica》2002,32(2)

  相似文献   

辽东湾辽中凹陷中部古近系东营组震浊积岩特征研究   总被引：1，自引：0，他引：1  

王元君  王峻  周心怀  滕玉波  陈安清 《矿物岩石》2008,28(3)

辽东湾辽中凹陷中部古近系东营组地层中发育多期大规模浊积扇,利用岩芯、薄片、测井及地震资料,对这些浊积岩及其下伏地层的沉积成岩特征、沉积构造和岩石类型分析,认为研究区东营组浊积岩与典型的原地震积岩伴生,属于地震成因的浊积岩.这些浊积扇的扇中以长石砂岩和岩屑长石砂岩为主,埋深一般在1 500 m～2 500 m左右,为早成岩演化Bl期.测井解释孔隙度平均为27.5%,储层物性良好,并且具有良好的生储盖组合,钻探证实其良好的含油气性.此类浊积扇与地震活动紧密相关,其分布具有一定的等时性,因此可以推测渤海海域郯庐断裂两侧在活跃期发育的大规模浊积扇,具有良好的岩性油气藏勘探前景.  相似文献   

山东玲珑金矿流体包裹体地球化学特征   总被引：8，自引：12，他引：8  

张祖青赖勇  陈衍景 《岩石学报》2007,23(9):2207-2216

玲珑金矿位于胶东半岛招-掖成矿带东部,是我国典型的超大型含金石英脉型金矿。成矿过程可划分为早、中、晚三个阶段,金主要在中阶段沉淀。早阶段流体包裹体为纯 CO_2型(L_(CO_2) V_(CO_2)>90%)和富 CO_2型(10%≤L_(CO_2) V_(CO_2)≤90%),中阶段为纯 CO_2型、富 CO_2型、富 H_2O 型,晚阶段为水溶液包裹体。从早到晚,包裹体均一温度分别集中在240℃～360℃、220℃～360℃、180℃～260℃和80℃～180℃,盐度分别集中在3.4%～10.4%、3.0%～10.2%、4.0%～14.6%和2.4%～5.0%NaCl eqv;早、中阶段流体盐度随温度降低而升高。中阶段第一世代石英中大量水溶液包裹体和富 CO_2包裹体共生,指示流体强烈沸腾。从早到晚,流体包裹体的变化记录了成矿流体性质和构造环境的演化。早阶段石英中沿 X 型节理发育面型包裹体群,既记录了石英脉遭受的剪切变形事件,又记录了同构造流体作用。而充填于张性裂隙的黄铁矿为主的多金属硫化物-石英组合则表明主成矿期构造环境由压性向张性转化,成矿流体系统减压沸腾、逐步开放,并导致金等成矿物质大量沉淀。结合区域构造演化和成矿时间,认为玲珑金矿成矿系统发育在应力场由挤压向伸展转换的构造背景,流体压力变化滞后于构造应力场变化,流体成分以低盐度、富 CO_2为特征,应属典型的造山型金矿系统。  相似文献   

A Simple Shear Model for the Asymmetry in the Paleoproterozoic Fold Belt in Liaodong Peninsula     

Cui Yingchun  Liu Junlai  Ma Lijie  Guan Huimei 《世界地质(英文版)》2001,4(1)

Several aspects of the Liaodong Paleoproterozioc fold belt, including its components, tectonic, metamorphic and magmatic characteristics are discussed in the paper, with emphasis on the asymmetry of the fold belt and differences between the northern lineal - fold belt and the southern dome - fold belt. It is suggested that the fold belt is one magrnatic passive margin, instead of a rift zone or the classical passive continental margin. The formation and evolution of the fold belt is discussed with a simple shear model, which may best explain the co - existence of contemporaneous tectonic facies with different characteristics, the volcanic and plutonic activities, sedimentary formations and their geological attributes etc.  相似文献