论文部分内容阅读
腾冲盆地为一火山堰塞型含泥炭褐煤山间盆地,面积约35km~2.盆地充填史可上逆至1000ka B.P,最大沉积厚度250余米,其中晚更新世至全新世地层连续沉积.本文从煤岩学、煤化学及放射性同位素年代学角度,论证了该盆地晚更新世软褐煤的存在,进而探讨了其形成的地质机理.晚更新世褐煤的发现,在国内外尚未见报道.
The Tengchong Basin is a volcanic plugged peat lignite interbasic basin with an area of about 35 km ~ 2. The basin filling history can go up to 1000 ka BP with a maximum deposition thickness of 250 meters, of which sediments are continuously deposited from Late Pleistocene to Holocene. From the perspectives of coal petrology, coal chemistry and radioisotope dating, the existence of soft lignite in the Late Pleistocene in the basin was demonstrated, and the geological mechanism of the formation was also discussed.The discovery of late Pleistocene lignite has not been reported at home and abroad.