共查询到20条相似文献,搜索用时 15 毫秒
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Yu Chongwen Faculty of Earth Sciences China University of Geosciences Wuhan 《中国地质大学学报(英文版)》1998,9(1)
POSINGTHEPROBLEM“ComplexityandSelf-OrganizedCriticalityofSolidEarthSystem”isanewproblemaswelasanewproposition.Theauthorputsfo... 相似文献
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Deng Jinfu Mo Xuanxue Zhao Hailing Luo Zhaohua Dai Shengqian Department of Geology Mineral Resources China University of Geosciences Beijing 《中国地质大学学报(英文版)》1999,10(1)
CATASTROPHEOFLITHOSPHERE┐ASTHENOSPHERESYSTEMANDYANSHANIANMETALLOGENICEXPLO┐SIONINEASTCHINATheoreticalConsiderationAnormallith... 相似文献
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Wang Pinxian 《地球科学进展》2014,29(11):1277-1279
Earth system science should not be understood as an all embracing term that combines various disciplines studying the planet Earth. Rather, it is a new approach to consider interaction between its various subsystems, and seeks to integrate various research fields to understand the Earth as a system. Earth system science has developed from global changes studies, then extended into the deep geological past and now is facing a new challenge connecting the surface processes with those in the Earth’s interior. 相似文献
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Doklady Earth Sciences - A model of the Earth’s cooling, which describes the formation of a solid core, is considered. Its formation enhances the convection due to additional energy sources... 相似文献
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G. L. Leitchenkov Yu. B. Guseva V. V. Gandyukhin S. V. Ivanov L. V. Safonova 《Geotectonics》2014,48(1):5-23
The Southern Indian Ocean comprises large sedimentary basins of the Riiser-Larsen Sea (western sector); the Cosmonauts, Cooperation (Commonwealth), Davis seas (central sector); and the Mawson-d’Urville seas (eastern sector). The main tectonic provinces of the Southern Indian Ocean (Antarctica) have been outlined as a result of comprehensive interpretation of the geophysical data. Special attention is paid to determining the boundary between the rifted continental and oceanic crust. The basin of the Riiser-Larsen Sea was formed in the Early Jurassic under the action of the Karoo mantle plume. The intrusive complex, as a remote manifestation of the mantle plume, occurs along the inner boundary of the marginal rift. Opening of the ocean in the basin of Riiser-Larsen Sea started about 160 Ma ago and was characterized by rearrangement of plate motion and intense volcanic activity at the early stage. In the basin of the Cosmonauts, Cooperation, and Davis seas, the final stage of rifting was accompanied by the rise of the lithospheric mantle and by intrusive magmatism. The opening of the ocean started here 134 Ma ago. Emplacement of the Kerguelen plume resulted in jumping of ridges and detachment of continental crustal blocks from the Indian margin with the formation of the Kerguelen Plateau (microcontinent). The basin of the Mawson-d’Urville seas has evolved under conditions of long-term rifting since the Late Jurassic and is characterized by an extended zone of mantle unroofing. Breakup of the lithosphere between Australia and Antarctica developed asynchronously over a time interval of 95–65 Ma ago with propagation of MOR from the west eastward. The research was carried out using a great body of geophysical information (~140000 km of CDP seismic profiling, more than 250 stations of seismic refraction sounding, and more than 250000 km of magnetic and gravity profiles) obtained by expeditions from many countries over more than 30 years. 相似文献
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Doklady Earth Sciences - New data on the structural–hydrodynamic organization of the ore-forming system (OFS) of the Irokinda deposit in the architecture of deep-seated faults are presented.... 相似文献
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HSU Weibiao 《《地质学报》英文版》2004,78(5)
Coupled with a petrographical study, I carried out an ion probe study of rare earth element microdistributions in mineral phases of silicate inclusions from the Colomera ⅡE iron meteorite. Most mineral grains have homogeneous REEs, but show considerable inter-grain variations by a factor of 2 to 100. The whole rock REE abundances for Colomera, estimated by combining REE data with modal abundances, are relatively LREE-enriched with REEs of -10'CI, which suggest that Colomera silicates were highly differentiated and might represent a low degree partial melt (-10%) of a chondritic source. REE geochemistry of Colomera silicate inclusions points to an origin that involves differentiation, dynamic mixing, remelting, reduction, recrystallization, and subsequent rapid cooling near the surface of a planetary body. 相似文献
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Dubinina E. O. Filimonova L. G. Avdeenko A. S. Chizhova Yu. N. Kossova S. A. Zhilicheva O. M. Aranovich L. Ya. 《Doklady Earth Sciences》2023,507(3):S390-S395
Doklady Earth Sciences - The oxygen isotopic composition of minerals (Qtz, Zrn, Kfs) and bulk samples of Late Cretaceous porphyritic leucogranites of the Omsukchan trough and the adjacent... 相似文献
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《Russian Geology and Geophysics》2016,57(5):639-652
The paper discusses a possible model of the ancient (Hadean-Archean) Earth’s geodynamic evolution. We believe that the early Earth was characterized by a stagnant lid regime and whole-mantle convection suggesting cells that convect through the whole mantle (from the core-mantle boundary to the lithosphere base). The lid tectonics was perturbed by asteroid-meteorite bombardments that destroyed the primary terrestrial partly granitoid crust. The destroyed crust together with the residual enriched mantle reservoirs sank into the lower mantle. In addition to the crust destruction, the bombardments led to emplacement of a huge proportion of basalt-komatiitic melts, which can be interpreted as mantle overturn events. In the Hadean, the Earth survived frequent large-scale asteroid-meteorite bombardments, which resulted in almost a complete destruction of the primary terrestrial crust. In the Early Archean, the Earth still experienced the same tectonic processes, as in the Hadean; however, meteorite impact was small-scale and the bombardments influenced only a limited area of a common, as it seems to us, subequatorial supercontinent. Those bombardments led to the sagduction of the Archean basalt-komatiiic terrestrial crust, which sank into the mantle, transforming into amphibolite-eclogite rocks giving rise to a tonalite-troondhjemite-granodiorite suite. As preserved in the zircon record, the formation of the Archean mantle-derived magmas occurred as pulses at 4.5, 4.2-4.3, 3.8-3.9, and 3.3-3.4 Ga. These peaks, most likely, correspond to the Hadean-Archean meteorite bombardments. There is evidence of formation of the subcontinental lithospheric mantle (SCLM) beneath the cratons between 3.3 and 3.5 Ga. This SCLM was markedly different from peridotites of modern ophiolites. However, the existence of ophiolitic peridotites indicates that modern style plate tectonic processes were in operation at that time, as we will discuss below. The transition from the early Earth (Hadean-Archean) tectonic style to the recent tectonics occurred between 3.4 (2.7?) and 2.0 Ga. 相似文献
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正Following the publication of Part Ⅰ of the series on"Frontiers in early Earth history and primordial life"(Maruyama and Santosh,2017),we present the second part in this volume compiling state-of-the-art research focusing on issues related to the early evolutionary history of the Earth and life.The first paper by Imaeda and Ebisuzaki(2018)on"Single planet formation regime in the high-ionization environment: 相似文献
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Doklady Earth Sciences - Data on the Early Jurassic volcanic rocks of the Kobyumé graben system, which formed at the Verkhoyansk passive margin of the Siberian Craton, are presented. The... 相似文献
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《地学前缘》2006,(1)
As of 2006 Earth Science Frontiers(ESF)is transitioningfroma quarterly publicationto bi-month-ly publication.Each year ,from2007 onwards ,issues ofESFwill be developed along three themes :1·Earth Materials for Nos .1 and 2 .2·Earth Tectonics and Dynamics for Nos .3 and 4 .3·Earth Surface Processes for Nos .5 and 6 .“Earth Materials”will focus onthe study of the Earth s composition,principally dealing with mineralogyand crystallography ,petrology ,fluids , mineral deposits and mine… 相似文献