期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
四川盆地下中三叠统盐系地层古地磁研究与成盐条件有关问题探讨 被引量:13
1
作者 林耀庭 何金权 《盐湖研究》 CSCD 2005年第4期1-4,共4页
四川盆地下中三叠统嘉陵江组—雷口坡组(T1j-T2L)盐系地层蒸发岩发育,是我国海相碳酸盐岩沉积区探盐找钾的重要地区层位。现通过四川盆地下中三叠统盐系地层古地磁样品的系统采集和测试工作,首次在我国建立了古地磁磁性地层剖面,并根据... 四川盆地下中三叠统嘉陵江组—雷口坡组(T1j-T2L)盐系地层蒸发岩发育,是我国海相碳酸盐岩沉积区探盐找钾的重要地区层位。现通过四川盆地下中三叠统盐系地层古地磁样品的系统采集和测试工作,首次在我国建立了古地磁磁性地层剖面,并根据测定结果,结合地质资料,探索了四川盆地下中三叠统(T1j-T2L)成盐古气候条件及其时代归属等有关问题。 展开更多
关键词 磁性地层剖面 古纬度与气候 成盐条件 下中三叠统 四川盆地
下载PDF
四川凉桥晚二叠世磁性地层学剖面 被引量:1
2
作者 陈海泓 Friedrich Heller 《科学通报》 EI CAS CSCD 北大核心 1994年第1期69-72,共4页
极性年表的问世使地层对比,尤其是洲际地层对比的精度大大地改善.然而,目前获得普遍接受的极性年表仅限于新生代与晚中生代.中侏罗世之前的极性转换历史,则因缺少大洋磁异常带以资对比而无广泛认同的标准.因此,若建立这一时期的极性年表... 极性年表的问世使地层对比,尤其是洲际地层对比的精度大大地改善.然而,目前获得普遍接受的极性年表仅限于新生代与晚中生代.中侏罗世之前的极性转换历史,则因缺少大洋磁异常带以资对比而无广泛认同的标准.因此,若建立这一时期的极性年表,大量的洲际对比是必须的. 展开更多
关键词 磁性地层剖面 晚二叠世 古地磁学
原文传递
The age measures and its layer sequence tratigraphy of Late Quaternary sediment in Lushan Dajiaochang of China
3
作者 Hu Dongsheng Hu Rong +5 位作者 Li Xiaoyu Hu Wenxuan Wang Xulong Tian Xingong Liu Weiguo Zhang Guowei 《Engineering Sciences》 EI 2013年第6期48-57,共10页
Through the scientific investigation on Lushan for a long time, detailed studies have been carried out on the geologic stratum section of Late Quaternary in Dajiaochang. The series age data of complete stratigraphic s... Through the scientific investigation on Lushan for a long time, detailed studies have been carried out on the geologic stratum section of Late Quaternary in Dajiaochang. The series age data of complete stratigraphic section and full time formation since 400 kaBP were based on the results of the analyses using the dating methods with various instruments such as the ancient geomagnetism, electronics spin resonance (ESR), 36C1 and lumines- cence dating, etc. Corresponding to these data, it identified the paleomagnetic polarity events including Biwa- III event (320 kaBP), Biwa- 1I event (260 kaBP), Biwa- I event (180 kaBP, scarcity due to the disturbance of the iron dish), Blake event (100 kaBP) and Laschamp event (20 kaBP, didn't grow due to the activities of the surface), etc. Combined with the sequence stratigraphy, layer type characteristics and its sediment environment, the strati- graphic can be divided into 4 stages of development respectively : Stage [ is the climate period of glacial epoch (200-400 kaBP); stage 11 is the climate period of interglacial epoch (100-200 kaBP); stage llI is the climate peri- od of periglacial epoch (10-100 kaBP); stage IV is the climate period ofpostglacial epoch (0-10 kaBP). 展开更多
关键词 sediment of Late Quaternary various instrument dating data layer type sequence and integrated ages Dajiaochang area of Lushan
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部