"磁暴基础数据库"项目成果介绍     

"磁暴基础数据库"项目组 《国际地震动态》2006,(9):9-12

本文详细介绍了“磁暴基础数据库”项目的立项背景、目标、所开展的主要工作、取得的成果、研究成果的社会效益和对该领域研究未来工作的展望。  相似文献   

被动源电磁阵列系统及其在某铜矿区的应用试验   总被引：3，自引：0，他引：3  

遥测电磁项目组 《物探与化探》1998,22(4):247-250271

本文介绍被动源电磁阵列系统的特点及该系统在某铜矿区的应用试验工作。与已知资料对比,试验结果给出了地下矿体的空间赋存形态,为矿区下一步工作提供了有意义的参考资料。  相似文献   

Search for Young Giant Planets with the Subaru 8-Meter Telescope: Instrument and Strategy     

Tamura  M.  Suto  H.  Itoh  Y.  CIAO Group 《Earth, Moon, and Planets》1998,81(1):109-110

Earth, Moon, and Planets -  相似文献   

MASS MOVEMENTS AND SEDIMENT TRANSPORT AS A NATURAL HAZARD     

Wolfgang KRON Senior Hydraulic Engineer  Geosciences Research Group  Munich Reinsurance Company  Munich  Germany 《国际泥沙研究》1997,(3)

I.INTRODUCTIONFormillionsofyearswindandwaterhaveshapedtheearth,mountainshavebeenliftedanderodedaway,waterhasevaporatedfromtheoceansandfallenbackonland,rivershaveformedandcarriedwaterandsedanmentfromthemoufltainstotheseas.Someoftherivers--suchastheColoradoRiverintheGrandCanyonregionofNorthAJnerica-foundstablecoursesastheycarvedthemselvesintotheground,others--suchastheYellowhiverinChina-havechangedtheircoursesfrequentlyallthewayintorecenthistory.Itwasonlyafewthousandyearsagothatmanstarte…  相似文献   

中国空间物理学学科发展战略研究报告     

中国空间物理学学科发展战略研究组 《地球科学进展》1996,11(2):140-150

从战略高度论述了空间物理学在认识人类生存环境、航天活动、经济发展中的重要地位和战略意义；以科学的态度分析了空间物理的发展史、现状和趋势；根据学科发展与我国国情相结合的原则提出了长期、中期和近期空间物理学的战略目标、战略重点和鼓励研究的课题以及实现战略目标的基本措施。  相似文献   

Crustal structure across the TESZ along POLONAISE''97 seismic profile P2 in NW Poland     

T. Janik  J. Yliniemi  M. Grad  H. Thybo  T. Tiira  POLONAISE P Working Group 《Tectonophysics》2002,360(1-4):129-152

The POLONAISE'97 (POlish Lithospheric ONset—An International Seismic Experiment, 1997) seismic experiment in Poland targeted the deep structure of the Trans-European Suture Zone (TESZ) and the complex series of upper crustal features around the Polish Basin. One of the seismic profiles was the 300-km-long profile P2 in northwestern Poland across the TESZ. Results of 2D modelling show that the crustal thickness varies considerably along the profile: 29 km below the Palaeozoic Platform; 35–47 km at the crustal keel at the Teisseyre–Tornquist Zone (TTZ), slightly displaced to the northeast of the geologic inversion zone; and 42 km below the Precambrian Craton. In the Polish Basin and further to the south, the depth down to the consolidated basement is 6–14 km, as characterised by a velocity of 5.8–5.9 km/s. The low basement velocities, less than 6.0 km/s, extend to a depth of 16–22 km. In the middle crust, with a thickness of ca. 4–14 km, the velocity changes from 6.2 km/s in the southwestern to 6.8 km/s in the northeastern parts of the profile. The lower crust also differs between the southwestern and northeastern parts of the profile: from 8 km thickness, with a velocity of 6.8–7.0 km/s at a depth of 22 km, to ca.12 km thickness with a velocity of 7.0–7.2 km/s at a depth of 30 km. In the lowermost crust, a body with a velocity of 7.20–7.25 km/s was found above Moho at a depth of 33–45 km in the central part of the profile. Sub-Moho velocities are 8.2–8.3 km/s beneath the Palaeozoic Platform and TTZ, and about 8.1 km/s beneath the Precambrian Platform. Seismic reflectors in the upper mantle were interpreted at 45-km depth beneath the Palaeozoic Platform and 55-km depth beneath the TTZ.

The Polish Basin is an up to 14-km-thick asymmetric graben feature. The basement beneath the Palaeozoic Platform in the southwest is similar to other areas that were subject to Caledonian deformation (Avalonia) such that the Variscan basement has only been imaged at a shallow depth along the profile. At northeastern end of the profile, the velocity structure is comparable to the crustal structure found in other portions of the East European Craton (EEC). The crustal keel may be related to the geologic inversion processes or to magmatic underplating during the Carboniferous–Permian extension and volcanic activity.  相似文献   

High-resolution body wave tomography beneath the SVEKALAPKO array: I. A priori three-dimensional crustal model and associated traveltime effects on teleseismic wave fronts   总被引：3，自引：0，他引：3  

Senén Sandoval  Edi Kissling  Jörg Ansorge  the SVEKALAPKO Seismic Tomography Working Group 《Geophysical Journal International》2003,153(1):75-87

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Non-linear body wave teleseismic tomography along the TOR array   总被引：2，自引：0，他引：2  

Z. Hossein Shomali  Roland G. Roberts  the TOR Working Group 《Geophysical Journal International》2002,148(3):562-574

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陕西省城固县桔园乡山地坡面观测及低空探测气象资料的分析     

The Research Group of Western China Mountainous Region Chengdu Institute of Meteorology 《成都信息工程学院学报》1989,(4)

本文通过陕西省城囿县山地实际考察资料的分析,旨在找出冬季山地逆温及暖带的分布规律,并为提高坡地柑桔种植上限高度提供依据,研究指出:当地逆温暖带高度为650—750米,坡地柑桔种植上限高度可达800米左右。  相似文献   

Improving depth resolution of teleseismic tomography by simultaneous inversion of teleseismic and global P-wave traveltime data—application to the Vrancea region in Southeastern Europe     

C. Weidle  S. Widiyantoro  CALIXTO Working Group 《Geophysical Journal International》2005,162(3):811-823

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