| 西藏定日贡扎上白垩统锶同位素曲线及年代地层划分 |
| |
| 引用本文： | 石和,黄思静,孙治雷.西藏定日贡扎上白垩统锶同位素曲线及年代地层划分[J].地层学杂志,2006,30(1):21-25. |
| |
| 作者姓名： | 石和 黄思静 孙治雷 |
| |
| 作者单位： | 1. 成都理工大学沉积地质研究院,四川成都,610059
2. 油气藏地质及开发工程国家重点实验室,四川成都,610059 |
| |
| 摘 要： | 根据从西藏定日贡扎上白垩统剖面中未经蚀变的海相碳酸盐样品中获得的50个锶同位素测试数据建立了对应于地层厚度的锶同位素演化曲线,与W.H.Burke等(1982)对应于地质年代建立的锶同位素曲线的同时代部分进行了对比,两条曲线极为相似,显示了地质历史中古海洋中的锶同位素组成具有全球一致的演化规律,为定日贡扎上白垩统剖面的年代地层划分提供了依据,同时还讨论了定日贡扎地区晚白垩世地层划分对比中的一些问题。
|
| 关 键 词： | 西藏 定日 上白垩统 锶同位素地层学 年代地层划分 |
| 文章编号： | 0253-4959(2006)01-0021-05 |
| 收稿时间： | 10 31 2005 12:00AM |
| 修稿时间： | 11 21 2005 12:00AM |
STRONTIUM ISOTOPIC CURVE OF THE UPPER CRETACEOUS FORM DINGRI, TIBET, AND THE CHRONOSTRATIGRAPHIC DIVISION |
| |
| SHI He,HUANG Si-jing,SUN Zhi-lei.STRONTIUM ISOTOPIC CURVE OF THE UPPER CRETACEOUS FORM DINGRI, TIBET, AND THE CHRONOSTRATIGRAPHIC DIVISION[J].Journal of Stratigraphy,2006,30(1):21-25. |
| |
| Authors: | SHI He HUANG Si-jing SUN Zhi-lei |
| |
| Abstract: | The fundamental principle of the Sr-isotopic stratigraphy is introduced briefly in this paper. An evolutionary curve of the Sr-isotope composition versus the thickness was set up based on 50 unaltered marine carbonate samples collected from the Late Cretaceous section in Gongza, Dingri, Tibet. It was correlated with the coeval part of the curve versus geologic time set up by W. H.Burke et al.(1982). The fairly close similarity between them exhibits a global consistent law of the evolution of strontium isotopic composition in ancient seawater during the geologic time and provides a basis for dating the Gongza section. Some problems about the stratigraphical division and correlation were discussed for the Gongza section in this paper. |
| |
| Keywords: | Sr-isotopic stratigraphy Tibet Dingri Upper Cretaceous chronostratigraphic division |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
