四川江油石炭纪锶同位素曲线—年代地层对比和海平面变化

基金项目: 国家自然科学基金项目“上扬子古生代海相碳酸盐岩的锶同位素组成及主要控制因素(批准号:49972044)”资助。

Srisotope curve from the Carboniferous section in Jiangyou,Sichuan:Chronostratigraphic correlation and sea level changes

摘要: 据从采自四川江油马角坝石炭系剖面中的未蚀变海相岩石样品中获得的22个锶同位素测试数据，建立了剖面的石炭纪锶同位素演化曲线。马角坝剖面的锶同位素曲线与我们在贵州惠水、Denison等在北美建立的同时代锶同位素曲线总体上是一致的，表明了锶同位素曲线对海相地层进行年代地层划分对比的重要性，根据对比结果，讨论了马角坝石炭系剖面的年代地层划分和海平面变化。
- 四川江油 /
- 石炭系 /
- 锶同位素演化曲线 /
- 年代地层 /
- 海平面变化
Abstract: A Carboniferous strontium isotope evolutionary curve was constructed based on22data of strontium isotope analyses of unaltered marine rock samples collected from a Carboniferous section at Ma-jiaoba,Jiangyou,Sichuan.The variation trend of this curve is consistent on the whole with that of the contemporaneous strontium isotope curves constructed using samples from Huishui ,Guizhou,China,and from North America,showing the importance of strontium isotope curves for the chronostratigraphic cor-relation of marine strata.According to the correlation of these curves,this paper discusses the chronostrati-graphic division of the Carboniferous section in Majiaoba and the sea level changes.
- Jiangyou /
- Sichuan /
- Carboniferous /
- Sr-isotopic curve /
- chronostratigraphy /
- sea level change