论文部分内容阅读
青海、新疆地区陆相、海相晚白垩世—第三纪地层颇为发育。为配合我国西部地区油气、膏盐的普查找矿工作,在地矿部有关部门大力支持下,笔者从1976年开始对青海西宁—民和盆地,新疆塔里木盆地的库车、莎车、乌恰等地区的晚白垩世—第三纪地层进行了系统的生物地层学研究。先后对20条露头剖面作了野外观测、系统采集和分析了样品2000余块,获得极为丰富的孢粉化石,从而建立了该区晚白垩世—第三纪孢粉组合序列,并对地层划分、对比,古气候,古植被及沉积环境,白垩系—第三系有关地层界线,孢粉植物地理分区等问题进行了讨论。为该区晚白垩世—第三纪地层划分及普查勘探提供了古生物学依据。
The continental and marine facies of the Late Cretaceous-Tertiary strata in Qinghai and Xinjiang are rather developed. In order to meet the prospecting work of oil and gas and gypsum salt in the western part of China, with the strong support of relevant departments of the Ministry of Geology and Minerals, the author started to study the mineral resources of Xiku-Minhe Basin in Qinghai Province, Kuche, Shache, Wucha And other areas of the Late Cretaceous - Tertiary stratigraphy systematic bio-stratigraphic study. Field observations were made on 20 outcrop sections in succession. More than 2000 samples of the samples were collected and analyzed to obtain extremely rich sporopollen fossils, and a sequence of Late Cretaceous-Tertiary sporopollen assemblages in this area was established. , Contrasts, palaeoclimate, paleofacies and sedimentary environment, stratigraphic boundaries of Cretaceous-Tertiary, geographical division of pollen plants and other issues were discussed. It provides the paleontological basis for the division of Late Cretaceous-Tertiary strata in this area and general survey and exploration.