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31.
Climate changes and associated natural and anthropogenic processes have manifested themselves particularly clearly during the last two decades. The study of consequences of these changes has become one of the central scientific, social and political issues of our time (Pilot 2000; UNEP 2007). 相似文献
32.
Anatoly Obzhirov 《东北亚地学研究》2006,9(2):161-163
The research works of methane concentration in water column of the Okhotsk Sea from 1984 to 2005 were reviewed.And some regularities of methane distribution in water column in the North-East Sakhalin slope of the Okhotsk Sea were concluded. 相似文献
33.
V.V. Makarov L.S. Ksendzenko V.M. Sapelkina A.A. Opanasyuk N.A. Opanasyuk E.N. Jashkova 《东北亚地学研究》2006,9(2):168-172
Rock mass failure on the high depth near the underground openings often has zonal character. The mechanism of this phenomenon consists in the periodical character of stresses in surrounding rock mass and developing of tensile macrocracks at the places (zones) of maximum tangentional stresses. Mathematical model of the high stressed rock mass is developed on the base of the defect media mechanics and nonequilibrium thermodynamics principals. The correspondence between the experimental research of faulted zonal structures near the high depths openings and mathematical model calculation is achieved. Relationships between the width of cracking zones and rock mass strength property have been determined. 相似文献
34.
1. Introduction In spite of the progress achieved in global climatemodelling during the last few decades, the models stillshow considerable errors even for the surface air tem-perature ?eld (Covey et al., 2000; IPCC, 2001; Lam-bert and Boer, 2001). As i… 相似文献
35.
1 Introduction The stromatolites of the Jiawengmen area in the southern belt of the Eastern Kunlun orogen were initially interpreted as vortex structures by the Regional Geological Survey Team, Qinghai Bureau of Geology and Mineral Resources in 1973; these samples were then identified as algal fossils of Sinian age by the Nanjing Institute of Geology and Paleontology (Qinghai Bureau of Geology and Mineral Resources, 1973). In 1994, Chen and Luo (1998) discovered some stromatolites, i… 相似文献
36.
Saurabh Baruah Santanu Baruah Naba Kumar Gogoi Olga Erteleva Felix Aptikaev J. R. Kayal 《地震学报(英文版)》2009,(3):283-291
Strong ground motion parameters for Shillong plateau of northeastern India are examined. Empirical relations are obtained for main parameters of ground motions as a function of earthquake magnitude, fault type, source depth, velocity characterization of medium and distance. Correlation between ground motion parameters and characteristics of seismogenic zones are established. A new attenuation relation for peak ground acceleration is developed, which predicts higher expected PGA in the region. Parameters of ... 相似文献
37.
BairN.Abramov 《东北亚地学研究》2004,7(1):15-19
In southern framing of Siberian Platform, basite-ultrabasite intrusive complexes were forming over a long period of time (Early Proterozoic-Paleozoic Era) as a result of collisional and post-collisional processes. In Muja zone they formed mainly in island-arch geodynamic conditions, in Kodaro-Udokan zone-in continental. Most productive toward noble metals in Muja zones are basite-ultrabasites of the Dovyrensk complex‘, in Kodaro-Udokan basites of the Chiney complex. Gold in these formations has both mantle and crustal springs. 相似文献
38.
LeonidV.Zamana LarisaP.Chechel 《东北亚地学研究》2004,7(1):52-57
Peculiarities of the tungsten deposits drainage flow chemical composition formation, the development of which was ceased almost 40 years ago, have been considered. Migration peculiarities of ore components have been covered, and forms of their migration have been calculated. Inertial characteristics of the surface flow contamination are shown. 相似文献
39.
Stratigraphy of southeastern flanks of Raichikhinsk brown coal field (Zeya-Bureya sedimentary basin)
Tat'yanaV.Kezina 《东北亚地学研究》2004,7(2):110-119
The results of the palynologic and paleobotanic analyses have allowed determining the Paleocene (including Danian) and Eocene deposits in the series of coal-bearing sediments of southeastern flanks of the Raichikhinsk brown coal field. Their age was corroborated by the palynologic and paleobotanic data. The detailed biostartigraphic data were obtained in the area““ Pioneer““ for the first time. The coal-bearing strata were correlated with those from the sections of the Arkhara-Boguchan brown coal field and the stratotype of the Tsagajan Formation of the Bureya Belogor‘ye. 相似文献
40.
1IntroductionThe south of the Far East comprises the largest mountain-folded and platform structures in the east-ern margin of Eurasia. The former ones are the Stanovoy, Yankan-Tukuringra-Dzhagdy, Turan, Bu-reya, Amur-Tugur and Sikhote-Alin arched and arched-block uplifts separated by the systems of in-termontane depressions (Tynda-Zeya, Khingan-Ni-man, etc.) with the inner small basins (Uda-Zeya, Upper Bureya, Mid-Amur, Konino-Khurmulinskiy, Lower Amur) (Fig.1). The Aldan shield a… 相似文献