摘要:A potash deposit, which was discovered, for the first time, a few years ago, is located in the Dawenkou Basin of Shandong Province in Chine. The potash-bearing bed occurs as an intercalated one in the multi-beds of rock salt in the second member of the Guanzhuang formation of the Eocene-Oligocene sediments. The author has proposed some views in terms of the specific conditions of the potash salt deposition based on the geological and geophysical exploration results and synthesized relevant data:1.The salt-b...

摘要:A fossil specimen of Sinamia sp. which is in association with fossil Lycoptera sinensis was, for the first time, discovered in the yellow-green sandy shales of the upper part of the Laiyang formation in the Laiyang Basin, Shandong Prov. during the regional geological surveying in this area in 1984. This discovery is of significance of increasing the fish fossil species in the Laiyang Basin and of extending the geographical distribution of Sinamia. It provides a new criterion for the stratigraphic correlatio...

摘要:By the geological surveying in the Jiagezhuang area where the standard section of the Fenzishan Group was established, the authors proposed some new ideas:(1) The bottom of the Fenzishan Group is not the feldspathic quartzite (or "~bottom conglomerate" ) but should be a layer biotite schist which has the characteristics of fossil residuum and can be reccognized as a key horizon.(2) The Fenzishan Group is not of mon(?)linal features but has the overturned isoclinal structures in this area.(3) Due to the infl...

摘要:The neutron activation logging technique which is an advanced nuclear logging technique was discussed in this paper. The technical requirements and conditions for determining the fluorite(CaF_2) content of rocks in drills, the factors which influence the use of the technique and the correction approaches were described in detail. The calculations of the CaF_2 content in the rocks from the measurements, the sensitivity of the logging, the precision and accuracy of the measurements were discussed as well.Two ...

摘要:The sepiolite studied occurs in the altered marble in a skarn—type iron mine near Jinan. The mineral is white in colour with a silky and earthy luster and occurs as fibrous aggregate in general. The microhardness(HV) of the mineral is 27.09 kg/mm~2 ( Mohs hardness =2.1); its specific gravity=2.03; Ng=1.5253, Np=1.5170, (一)2V=52°. The sepiolite is usually associated with dolomite.The chemical composition of the sepiolite is given as follows: SiO_2= 53.67%, MgO=23.66%, H_2O=18.55%, Fe_2O_3=1.68%, CaO=0.51%, A...

摘要:In this paper, the last part of an experimental research report, the author presents the procedure for the adjustment and correction of the model of groundwater quality. With the finite element method, the groundwater 1 evels and the concentrations of pollutants in several time intervals, calculated by a computer program according to the model, were fitted to the actually measured levels and concentrations until the absolute errors between the calculated and actual values were decreased to within the expect...

摘要:ln Shandong the karst springs which are the natural outcrops of karst groundwater can be classified into five genetic types, i. e. the erosion-fault springs, the erosion—contact springs, the igneous—body—related contact springs, the erosion springs and the fault springs with the first two types predominated. 308 karst springs have been found of which 36 have a flow greatcr than 10000 cubic meters per day. They are mainly distributed in the hilly land of the central—south of Shandong Prov. and, in particular...

摘要:The drafting of the stereogram to present precisely a crystal form was accompanied with the use of a duoble ring reflection goniometer. The stereographic presentation methods of mineral crystals, however, have not been adopted widely by the heavy mineral researchers yet even over a hundred years later which caused some incorrect illustrations of Crystal forms and crystallograp ic indices in the publications. In addition to the stereographic methods illustrating crystal forms, the methods for the planar illu...