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Interseismic GPS velocities in Sakhalin indicate that the island moves to the west at 3-4 mm/yr with respect to the Eurasian plate, which is about half of the relative Eurasia North America plate convergence rate. GPS measurements...
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Interseismic GPS velocities in Sakhalin indicate that the island moves to the west at 3-4 mm/yr with respect to the Eurasian plate, which is about half of the relative Eurasia North America plate convergence rate. GPS measurements across the central Sakhalin fault system provide evidence of compressive and strike-slip strain accumulation at a rate less than or equal to3 mm/yr. Coseismic vertical displacements produced by the August 4, 2000 M-w 6.8 Uglegorsk earthquake in Sakhalin were analyzed by constrained nonlinear inversion which provided evidence for a reverse faulting mechanism on an east-dipping fault plane. [References: 10]
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Subduction plays a fundamental role in dynamics of the mantle convection and in material circulations of the Earth’s interior. Slabs have been imaged to subduct near horizontally in the transition zone (TZ) beneath the Northeast ...
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Subduction plays a fundamental role in dynamics of the mantle convection and in material circulations of the Earth’s interior. Slabs have been imaged to subduct near horizontally in the transition zone (TZ) beneath the Northeast Asia in seismic tomography. Triplication waveform modeling is an effective tool to study the detailed seismic structure in the TZ. However, TZ triplication modeling has traditionally relied on 1-D models. In this study, we use the spectral element method to explore influences of 2-D/3-D slab structure on TZ triplication waveforms and to model, for the first time, the slab and TZ structures beneath the Northeast Asia. Synthetic tests suggest that, for a subduction zone earthquake, slab structure can have important influences on TZ triplication waveforms and that, even in a narrow azimuth range, the effects from 2-D/3-D slab structure on the wave propagation can lead to erroneous conclusions with 1-D modeling. Our data are high-quality triplicated SH waveforms (at distances of 10°–32°) from a deep event (below 410 km discontinuity) in the Pacific subducting slab. Our 2-D/3-D waveform modeling results suggest that a simple model of the subducting slab (+5% high-velocity anomaly and ~100 km thick down to 560 km) but normal below 560 km can match most of the observed waveforms remarkably well. The bottom of the TZ of the sampling region (north of the Yellow Sea) contains a patch of very slow anomaly. The results indicate that subhorizontal slab above the 660 discontinuity is not everywhere beneath Northeast Asia and the subducting slab is not everywhere continuous to the bottom of the TZ. Compared with the traditional 1-D modeling, our new 2-D/3-D approach provides better fits to the data and allows us to constrain the slab geometry and to separate TZ structure from slab structure
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According to various factors influencing the economic openness, this paper probes tentatively into the way Northeast China complies with and participates in the Northeast Asian cooperation, with particular attention to the analysi...
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According to various factors influencing the economic openness, this paper probes tentatively into the way Northeast China complies with and participates in the Northeast Asian cooperation, with particular attention to the analysis and estimation of the advantageous geographical condition of the external cooperation in Northeast China from the present situation of developing the external economy and cooperation with the adjacent countries.
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Northeast Asia with China, Japan and South Korea as the main components has drawn more and more attention worldwide. Many scholars have researched on the prospect of some alternatives of regional economic integration in Northeast ...
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Northeast Asia with China, Japan and South Korea as the main components has drawn more and more attention worldwide. Many scholars have researched on the prospect of some alternatives of regional economic integration in Northeast Asia and/or Yellow Sea Rim as its core area. In this paper the authors start with an introduction of the major arguments embracing Yellow Sea Rim regionalism, and attempt to identify the dynamics challenging the proposed approaches of sub-regionalism of Northeast Asia. The paper firstly gives a brief review on the update development of bilateral economic exchanges, mainly Sino-Japanese and Sino-South Korean trades and direct investments with related contemporary issues. When the changing pattern of economic interactions is analyzed, special concerns are given to the possibility to realize the supposed potential of regional economic cooperation mainly based on economic complementarity among the related regions of China, North Korea, South Korea, and Japan. The authors then made their major efforts on putting forward possible approaches of multilateral cooperation of three countries in the near future, that is, deepened cooperation in select-ed sectors of industry and transportation and coordinated development among major cities. The authors stress that the develop-ment of sub-regional sectoral cooperation and the formation of interactive network of city-regions via social and economic interactions at local level are significant to the future regional integrated development in Northeast Asia.
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The Permian marine biostratigraphy, faunal successions and mutual correlations (where possible) throughout East and Northeast Asia are synthesized, region by region, based on both published literature and the author's field observ...
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The Permian marine biostratigraphy, faunal successions and mutual correlations (where possible) throughout East and Northeast Asia are synthesized, region by region, based on both published literature and the author's field observations in certain parts of the region. The correlation of the Permian marine successions of NE Asia with the Permian international timescale and, in particular, with Gondwanan Permian marine sequences remains a major challenge, due to profound marine provincialism during the Permian. However, by employing biogeographically mixed faunas from East Asia (SE Mongolia, NE China, South Primorye of Far East Russia and the South Kitakami Terrane of Japan) as 'biostratigraphic gateways', coupled with some bipolarly and bi-temperately shared Permian marine taxa and faunas, it has been possible to correlate, with reasonable confidence, some of the high-palaeolatitude Permian marine rock units and faunas of NE Asia with those of the Tethyan region and Gondwana. Palaeobiogeographically, the Permian marine faunas of East and NE Asia are assigned to four major provinces: Verkolyman, Sino-Mongolian-Japanese, Cathaysian and Panthalassan provinces, on the basis of their palaeogeographical distribution patterns and characteristics of faunal assemblages. Of these, the Sino-Mongolian-Japanese Province has considerable significance for regional palaeogeographical, plate tectonic and palaeoceanographical reconstructions during the Middle Permian, because of its conspicuously mixed cool- and warm-water marine biota. The origin of this biogeographically mixed marine biota is interpreted to have resulted from a combination of some key factors, including the increased tectonic convergence between the Bureya-Jiamusi Terrane and the Sino-Korean Platform during the Permian and the intermingling of both warm-and cold-water ocean currents off the eastern coastal areas of the Bureya-Jiamusi Terrane and the Sino-Korean Platform during the Middle Permian.
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The purpose of this study is to suggest a major strategy to become effective for each port in Northeast Asia by analyzing the relative efficiency of each port to determine the current level of efficiency, efficient harbors plan. I...
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The purpose of this study is to suggest a major strategy to become effective for each port in Northeast Asia by analyzing the relative efficiency of each port to determine the current level of efficiency, efficient harbors plan. Individual port of the major 16 ports in Northeast Asia was analysed targeting efficiency and relative efficiency. In this study, DEA technique was used. Of the DEA model, CCR (constant returns to scale) models and BCC (variable return to scale) model was applied to analyze the efficiency and effectiveness of the port. Then the efficiency measured through CCR model is again compared with the efficiency measured by the BCC model. In this way, the empirical analysis includes the input factors of the operating ports such as the number of berths, wharf, depth, total area of the pier, C / C numbers and output elements includes the container throughput. The results of the study show that most of the ports in China is efficient whereas those in Korea and Japan are relatively inefficient. There are some pairs of ports which has the similar input factors, like Busan port and Shanghai port, Lianyungang port and Incheon port, Dalian port and Gwangyang port, but the container throughput of them has a huge difference.
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This volume presents some of the contributions resulting from a conference on recent developments in studies of the NE Asian Palaeolithic and Pleistocene that was held in June, 2013, in Yinchuan, the Ningxia Hui Autonomous Region,...
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This volume presents some of the contributions resulting from a conference on recent developments in studies of the NE Asian Palaeolithic and Pleistocene that was held in June, 2013, in Yinchuan, the Ningxia Hui Autonomous Region, in the Peoples' Republic of China, near the famous Palaeolithic site complex of Shuidonggou (SDG). At this conference, over 60 papers were presented on new evidence from China, and others on Mongolia, Korea, Japan, and Siberia, and of these, 22 are published here.
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Eighty-four species of spiders and one species of harvestman are reported from Eastern Koryakia. 37 species and one family; Agelenidae, are new to Koryakia. Of these, 25 species and seven genera are new to the entire Kamchatka Pen...
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Eighty-four species of spiders and one species of harvestman are reported from Eastern Koryakia. 37 species and one family; Agelenidae, are new to Koryakia. Of these, 25 species and seven genera are new to the entire Kamchatka Peninsula. Seven speciesare illustrated. A list of all species reported from Koryakia is presented and most interesting finds are discussed.
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The possibility of an asymmetric response of summer (June-July-August; JJA) vegetation vigor over Northeast Asia (NEA), captured by Advanced Very High Resolution Radiometer Normalized Difference Vegetation Index (NDVI), to the pre...
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The possibility of an asymmetric response of summer (June-July-August; JJA) vegetation vigor over Northeast Asia (NEA), captured by Advanced Very High Resolution Radiometer Normalized Difference Vegetation Index (NDVI), to the preceding spring (February-March-April; FMA) El Nio-Southern Oscillation (ENSO) cycle was investigated. Over the period 1982-2006, negative NDVI anomalies with statistical significance appeared over NEA during El Nio episodes; whereas, during La Nia, only slightly increasing NDVI anomalies appeared, and without statistical significance. Results showed the asymmetric responses of atmospheric circulations to El Nio and La Nia to be the most likely main mechanisms responsible for the asymmetric impacts of the spring (FMA) ENSO cycle on summer (JJA) NDVI over NEA (NEA-NDVI). During El Nio, a meridional teleconnection with an anticyclone-cyclone-anticyclone poleward structure is formed from the Philippine Sea to the Sea of Okhotsk. NEA is located right at the border between the mid-latitude cyclone and the high-latitude anticyclonic anomalies, accompanied by a strong northeasterly wind anomaly and the transport of dry, cold air from Russia and East Siberia to NEA. Therefore, the vegetation vigor is distinctly inhibited during El Nio episodes. However, during La Nia episodes, there is a quasi-meridional teleconnection along the Great Circle Route from the tropical western Pacific to the North Pacific, which is quite different from the meridional teleconnection formed during El Nio episodes. Results showed that the northeastward pattern has little impact on circulation and climate factors over NEA. As a result, during La Nia, only a slightly increasing NDVI anomaly appears over NEA, and without statistical significance.
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It is shown that the granitoids of the Main Kolyma Batholith Belt do not penetrate into the Upper Jurassic deposits of the Yana-Kolyma mesozoids. The applicability of U-Pb SHRIMP zirconometry to the Mesozoic period of geological h...
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It is shown that the granitoids of the Main Kolyma Batholith Belt do not penetrate into the Upper Jurassic deposits of the Yana-Kolyma mesozoids. The applicability of U-Pb SHRIMP zirconometry to the Mesozoic period of geological history is subject to critical analysis. It is concluded that analytical limitations preclude the solution of the concordance-discordance alternative of the obtained datings in the Mesozoic U-Pb isotopic systems by computational approaches. The U-Pb isotopic system is established as highly sensitive to the superimposed processes. Based on the reconciliation of the U-Pb, Rb-Sr, Ar-Ar, and K-Ar geochronometric data, the granitoids of the Kolyma Main Batholith Belt intruded 170-160 Ma ago, while their isotopic systems were transformed 150-140, 135-125, and 100-80 Ma ago. The local SHRIMP zirconometry combined with other isotopic methods can be applied to date igneous rocks by the relic dates, to set the time of intrusion into their isotopic systems, and to predict thermal events not identified yet. The U-Pb SHRIMP zirconometry should not be considered as arbitrary.
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