Abstract:

Jinbei buried hill consists mainly metamorphic terrigenous clastic rock,diamictite,carbonatite,evaporite and silicite. Paleo-microphytes of the study area include 20 genera and 33 kinds,the characteristic fossils and the fossil assemblages could be correlated to that of Middle Proterozoic in Jixian County nearby.Illite crystallinity of the buried hill is 122～150,bo-value is 9.030～9.066, showing low metamorphic greenschist facies. In short,the strata of the buried hill show similarity in lithology,lithofacies, fossils,metamorphic grade and geochemistry with those of Middle Proterozoic Dahongyu,Gaoyuzhuang,Yangzhuang,Wumishan Formations of the neighbouring areas but differ greatly from those of the Paleozoic. So it is suggested that the strata should correspond to the above mentioned formations.

Key words: Jinbei dolomitite, buried hill, lithohorizon, biostratum, metamorphic grade,geochemistry