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 共查询到20条相似文献,搜索用时 46 毫秒
1.
HYALOPHANEBEARINGGNEISSINNORTHCHINACRATONANDITSGEOLOGICALIMPLICATIONYanYuehuaInstituteofGeology,ChineseAcademyofSciences,Bei...  相似文献   

2.
METAMORPHOSEDMICROCLASTICROCKTYPEGOLDDEPOSITSINCHINALuDefuInstituteofGeology,ChineseAcademyofSciences,Beijing100029WangXiuzh...  相似文献   

3.
WEBGEOGRAPHICINFORMATIONSYSTEMSongXianfengTheInstituteofGeography,ChineseAcademyofSciences,Beijing100101TanHaiqiaoChinaUniver...  相似文献   

4.
EvolutionandStructuralStyleofTianshanandAdjacentBasins,NorthwesternChina¥LinHefu(EepartmentofEnergyResourcesGeology,ChinaUniv...  相似文献   

5.
CONCEPTIONSOFHEAVYFLOODSCAUSINGLAND┐SLIDE/SLIDETherearemanydisasters/hazardsoccuringontheearth’ssurface.Theseeventspresenteda...  相似文献   

6.
COVERED KARST COLLAPSE IN TONGLING AREA, ANHUI, CHINA   总被引:2,自引:0,他引:2  
COVEREDKARSTCOLLAPSEINTONGLINGAREA,ANHUI,CHINAWangGuoqiangDepartmentofEnvironmentandResource,HefeiUniversityofIndstry,Hefei23...  相似文献   

7.
THECYCLEOFHOLOCENECLIMATICANDENVIRONMENTGEOLOGICALCHANGESINCHINABiFuzhiandYuanYoushenInstituteofCrustalDynamics,StateSeismol...  相似文献   

8.
SOMENEWOPINIONSABOUTTRIASSICGASTROPODASSEMBLAGESINCHINAPanYuntang(GraduateSchol,ChineseAcademyofSciences,Beijing100039)(Rece...  相似文献   

9.
OntheAcretionofEasternAsianContinentalBlockssinceTriasic*WanTianfengZhuHongDepartmentofGeologyandMineralResources,ChinaUniver...  相似文献   

10.
AnIntroductiononBasinGeodynamicsofEasternChinaLiSitianFacultyofEarthResources,ChinaUniversityofGeosciences,Wuhan430074Geodyna...  相似文献   

11.
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.  相似文献   

12.
Robert L. Linnen   《Lithos》2005,80(1-4):267-280
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.  相似文献   

13.
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.  相似文献   

14.
正The Kuqa depression deposited thick rock salt,which has a lower density than surrounding rocks.When salt bodies form a certain scale,obvious negative gravity anomalies can be detected in the surface.Therefore,gravitational method can quickly obtain the shape,plane distribution of deep-seated salt bodies and overall tectonic morphology of the basin.  相似文献   

15.
正1 Introduction The Pingluoba brine,which characterized as high concentration with sodium,potassium,boron,lithium,and rubidium,possess great development value.The main composition of the brine can be summarized to the  相似文献   

16.
正1 Introduction In the present paper,MgCl2·6H2O,FeCl3·6H2O,and CeCl3·6H2O were used as raw materials in the precipitationhydrothermal method to synthesize MgF eC e hydrotalcite.The effects of the Fe:Ce molar ratio on the composition,crystal structure,and thermal stability of hydrotalcite are examined.Energy-dispersive X-ray spectroscopy(EDS),X-  相似文献   

17.
正1 Introduction Crystallization is one of important unit operations in the chemical production process,which requires not only the crystal product with high purity and yield,but also the available particle size of the crystal products to ensure product quality.Crystallization process is affected by  相似文献   

18.
正Dear Authors and Readers:First of all,on behalf of the new Editorial Board,I would like to express our sincere appreciation for your continuing support of our journal.This journal,founded in 1922,is the oldest geological journal in China.As the flagship journal of the Geological Society of China,it has become more and more influential in earth sciences in China and beyond.The journal is now indexed by SCI,CA and more than 20 other databases,with an impact  相似文献   

19.
正20141283 Bai Daoyuan(Hunan Institute of Geological Survey,Changsha 410016,China);Zhong Xiang Nature,Origin and Tectonic Setting of Jinzhou Basin in the South Segment of Xuefeng Orogen(Geology in China,ISSN1000-3657,CN11-1167/P,40(4),2013,p.1079-1091,10 illus.,47 refs.)Key words:foreland basins,strike-slip faults,Hunan Province  相似文献   

20.
正20142093Chen Daohua(Guangzhou Marine Geological Survey,Guangzhou 510075,China);Diao Shaobo The Latest Progress of Geological Marine Testing Technology in China(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,32(6),2013,p.850-859,105refs.)Key words:chemical analysis,China  相似文献   

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