黑龙江东部勃利煤盆地海相双壳类化石的发现及其意义

THE DISCOVERY THE MARINE FACIES BIVALVE FOSS ILS IN THE BOLI COAL BAS IN, EASTERN PART OF HEILONGIlANG PROVINCE, AND ITS SIGNIFICANCE

黑龙江东部勃利煤盆地海相双壳类化石发现于七台河市区北96号钻孔岩芯中。经鉴定确认为:Quenstedtia inglongshanensis Liet. Yu根据海相双壳类化石分布可推测:中、晚侏罗世,黑龙江东部发生四期海侵:第Ⅰ期发生在中侏罗世巴统中一晚期;第Ⅱ期发生在中侏罗世卡洛至牛律期;第Ⅲ期发生在晚侏罗世牛津晚期至启未里早期;第Ⅳ期发生在晚侏罗世启未里晚期至伏尔加早期。前三期海水来自日本海,最后一期海水亲自鄂霍茨克海。

The marine facies bivalve fossils of the Boli coal baein, in. the east of Heilongjiang province were found in the drill hok no. 06 in the north of Qitaihe city. It was identified as: Quenstedtia qinglongshanensis Li et yu. It was inferred that cluring the nliddle—late jurassic epoch there were four periods of transgressions in the east Heilongjang.province according to the distribution of the marine facies bivalve fossils. The first, transgression took place in middle—late bathon of middle jurassic epochr, the second in callov—middle oxtord of middle jurassic epoch the third in late oxtord—earlp kimmeriag of upper jurassic epoch, and last in upper kimmerag—early volg. Tha sea water during theferst 3 period of the transgressions came from the japan sea, during the last period, the sea water came from the ohotehk Sea (Oxomckoeuope).