| 论塔里木盆地西部海相古新统划分 |
| |
| 引用本文： | 郭宪璞.论塔里木盆地西部海相古新统划分[J].地质论评,1994,40(4):322-329. |
| |
| 作者姓名： | 郭宪璞 |
| |
| 作者单位： | 中国地质科学院地质研究所 北京 |
| |
| 摘 要： | 塔里木盆地古部海相古新统原来由陈尔塔什组和齐姆根两个组构成，根据在陈尔塔什组下伏地层－吐依洛克组发的有孔虫组合和介形虫的时代，本文将该组厘定为古新统Ｄａｎｉａｎ阶而非上白垩统，本文从生物地层学、事件地层学、稳定同位素地层学，古气候学和地球化学五个方面确定了古新统的底界；提出了古新统划分新方案，即自下而上包括吐依洛克组、阿尔塔什组和刘姆根组三个组；划分出古新统五个有孔虫组合，其中两个为新建；文中还描
|
| 关 键 词： | 塔里木盆地 海相 古新世 地层划分 |
THE STRATIGRAPHIC DIVISION OF THE MARINE PALEOCENE IN THE WESTERN TARIM BASIN |
| |
| Guo Xianpu.THE STRATIGRAPHIC DIVISION OF THE MARINE PALEOCENE IN THE WESTERN TARIM BASIN[J].Geological Review,1994,40(4):322-329. |
| |
| Authors: | Guo Xianpu |
| |
| Abstract: | Lower Paleocene foraminifer fossils were first found by the author in the Tuylok Formatior. in the western part of the Tarim Basin. They include 7 ger.era and 4 species, which are quite different from the forms of the Upper Cretaceous. The present study shows that foraminfers of the Tuylok Formation are very similar to those from the Tertiary of Europe, North America ar.d Russia. The age of the Tuylok Formation, therefore, can be determined to be Early Paleocene, i. e. the Danian, rather than the Late Cretaceous as was considered before.Five foraminiferal assemblages are recognized ir, the Paleocene of the Kuzgongsu section and Artash section, which are from the bottom upwards as follows;1.the Cibicides-Cibicidoides assemblage2.the Spiroplcctammina-Textularia assemblage3.the Lagenammina-Haplophragmoides assemblage4.the Discorbis-Globigerina-Globorotalia assemblage5.the Nonionellina-Anomalina assemblageThe Paleocene can be divided into three formations, namely in ascending order: the Tuylok Formation, the Artash Formation and the Qimugen Fornation, based on new evidence of foraminiferal fossils and geochemical and paleoclimatic anomalies between the Tuylok Formation and the underlying Ygezya Formation (i. e. the Cretaceous-Tertiary boundary found in this region). |
| |
| Keywords: | foraminiferal assemblages geochemistry paleoclitnatology Paleocene series Tarim |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
|
