摘要:Detailed study of Linglong Granites has been carried out.The petrological and mineralogical characteristics of the Linglong,Granites, the contact relationship of the granitic body with pre-Sinian metamorphic country rocks,the presence of relicts of the country rocks,as well as the melt and fluid inclusion evidence indicate that the Linglong granites are not,products of fractional crystallization from the mantle-derived magma, but are the result of granitization from the pre-Sinian metamorphic rocks The gran...

摘要:Through the studies on the biostratigraphy,lithostratigraphy,isotopic age determination,spectrum determination and heavy minerals of the Qing- sha Formation in the Mengyin Basin,we may gain the following recog- nition: 1.The Qingshan Formation can be divided into five lithologic mem- bers(from the top to the bottom): (5)volcanic breccia-agglomerate member; (4)andesite-basalt member; (3)volcanic breccia-agglomerate member; (2)tuff-siltstone member; (1)conglomerate-agglomerate member. 2.The fossils in the Qin...

摘要:The Yishu Fault Zone(a segment of the Tancheng--Lujiang Fault Zone in Shandong Province)and the structures in its surrounding areas have been clearly shown on the gravitational and magnetic maps;the Yishu Fault Zone is expressed as a NE-trending gravity gradient zone and a ran- tdom magnetic zone,whereas the boundary between the Jiaonan Uplift and he Jiaolai Depression on the east side of the Yishu Fault Zone is indicated by a distinct gravity gradient and an aeromagnetic linear normal anomaly, both of whic...

摘要:In this paper,the authors ascribe the metamorphosed strata on the Jiaonan Uplift to as the Jiaonan Group for which a detailed division has been made.The protolith and the formations of the Jiaonan Group,its contact relationship with other rocks,the volcano-sedimentary eycles,the lithofacies-and palaeogeographic features,the stratigraphic correlation as well as the forming ages of the Jiaonan Group are expounded.The unique tectonic setting of the Jiaonan--Dabie Uplift,situated between the North China Contine...

摘要:Through the study of chemical compositions of typomorphic minerals and nodules in the Mengyin kimberlites,it is deduced that the forming temperatures and pressures for the Mengyin kimberlites are in the range of 1300—2000℃ and 45—99 kb respectively.It is further suggested that: (1)the depth at which the diamond-bearing kimberlites were formed is no less than 140km;(2)a boundary between the upper part and the lower part of the ideal profile of the upper mantle can be set at the depth of about 140kin,above wh...

摘要:In this paper,the first part of an experimental research report,five aspects are expounded,They are:(1)geohydrologic conditions in the area for the experimental study and the division of the studied area in terms of the characteristics of the stratigraphy(aquifer beds)and of ground water movements through the aquifer beds;(2)the selection of pollu rants for the simulation and the distribution of pollution sources based on a brief discussion on the initial values of groundwater pollutio nand the pollution st...

摘要:This paper discusses the feasibility and the mechanism for reducing fluorine content in water and improving its quality for drinking by the natural clinoptilolite—potassium aluminium sulphate system based on the theory of surface chemistry of the hetrogeneous coagulation and through tests and verification with different experimental methods.The process of exchange-adsorption reaction is discribed in detail and relevant chemi- cal equations have been given.A fluorine-removing water-supply station designed ac...