摘要:Many large gold deposits with plenty ore reserves are hosted immediately in the Linglong Granites and, hence, the study of its age is of great interest to clarify the rock-forming process(es) of the Linlong Granites and the related ore-forming process(es). Through the detailed reduction and analysis of 49 isotopic age measurements of different kinds from the Linglong Granites during 1964—1984, it is suggested that the Linglong Granites were formed in the early Yanshan movement of the late Jurassic. The mode...

摘要:In this paper the regional gravitational and magnetic fields in the Jiao-Lai Depression and its surrounding area are discussed and explained in terms of the plate-tectonics by analyzing the gravitational and magnetic data ayailable. A preliminary view on the mechanism of the formation of the JiaoLai Depression and the evolution of the deep structures and superstructures in the region is thus proposed; and a model of upwelling of the Conrad discontinuity-basalt layer has been developed for discussion.

摘要:In this paper a part of collection of fossil insects obtained from the Laiyang Formation in Shandong province is described. It contains 16 genera and 19 species, of which 11 genera and 17 species are new. They are listed below: Laiyangia delicatula sp. nov., Pseudoacrida of. P. costata Lin, Falsirameus ravus gen. et sp. nov., Mesoccus lutarius gen. et sp. nov., M. advens sp. nov., Sinojassus gen. et sp. nov., Arehijassus?Plurinervis sp. nov., Clypostemma xyphiale J. Popov, C. petila sp. nov., Karataviella s...

摘要:It was proved by the palaeontological, mineralogical, petrological and geochemical studies that the transgressions had twice taken place in the Eogene period in the Jiyang depression. The first one took place when the middle and upper parts of the Shahejie-4 Formation in the Eocene series was deposited; the second one occurred when the lower and middle parts of the Shahejie—1 Formation in the Oligocene was formed. The transgressions changed the continent into a lagoon in this area. After the transgressions ...

摘要:By the study and comparison of the chemical compositions of the garnets and diopsides from deep-seated xenoliths in the kimberlites in Shandong with those of the same minerals in diamond and diamondiferous xenoliths, as have been reported in the literature, the author shows that the difference in chemical compositions of the same mineral in the xenoliths derived from different depth can exist, and further expounds the characteristics in chemistry of those deepest-seated minerals in the kimberlites which are...

摘要:The Eastern Shandong Peninsula, which is a typical hilly land, has undergone long-term uplifting. Metamorphic rocks are widespread in this region, faults are well developed and multi-phase magmatic intrusions are present. The aqueous system in bedrock in the metamorphic terrain consists mianly of the weathering fissure water, structure fissure water, karst fissure water and underground thermal water from the geothermal regime. They are distributed as zones. The fissure water in the bedrock has been formed a...

摘要:Based on the conception of water isostatic compansation, the regiona geomorphological and structural features and a good deal of core-drilling data, the author studied the regularities of the supply, runoff, storage and drainage of groundwater in the Tai-Lai valley (basin) in Shandong Province during the 1956-1979 period by synthesizing and analyzing the actually measured quantities of runoff of the rivers and the data recorded on the groundwater conditions of the region. A formula for the calculation of th...

摘要:The gold deposits in the Zhaoyuan-Yexian region are controlled by three basic factors: the stratigraphy(the Jiaodong Group), magmatic rocks and structures. The Jiaodong Group spreading approximately in the E-W direction is chars cterized by high abundance of gold and, thut, is generally considered to be the source bed of the gold deposits. It is probably the primary source material yielding the Linglong and Guojialing granitoid bodies. The Linglong and Guojialing bodies also have a higher abundance of gold ...

摘要:The brecciated Danyashan Quartzite which intercalates some of the brecciated slate in the Penglai region, Shandong Province belongs to the Fuzikuang formation of the Penglai series of the Proterozoic era. The origin and the characteristics of the breeciated quartzite are described. The author suggests that the brecciated quartzite belongs to the cryptoexplosion breccia which was related to the eruption of basalt during the Tertiary period and is neither sedimentary and syngenetic conglomerate, nor tectonic ...