| 碳、氧、锶同位素在羌塘盆地龙尾错地区层序地层研究中的应用 |
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| 关键词:Middle- Upper Jurassic C, O, Sr isotopes sequence stratigraphy Qiangtang basin |
| 基金项目:国家油气专项(编号:XQ2004-06) |
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| 摘要: |
| The Application of Carbon, Oxygen and Strontium Isotopes to the Study of Middle-Upper Jurassic Sequence Stratigraphy in Longweicuo Area, Qiangtang Basin |
| Based on an analysis of outcrops in Lonweicuo area, this paper deals with the Middle-Late Jurassic sequence stratigraphy and the responses of carbon, oxygen and strontium isotopes. The strata can be divided into three 3rd-grade sequences from Buqu Formation to 1st Member of Xueshan Formation, with δ13C, δ18O and 87Sr/86Sr changing regularly from TST to HST. The averages of δ13C, δ18O and 87Sr/86Sr are relatively high in TST and show positive characteristics on the longitudinal curve, which is opposite to things of HST in the same sequence from Buqu period to late Suowa period. The three distinct positive and negative excursions corresponded to three times of sea-floor spreading and stagnation. A few abnormal data are also analyzed in this paper. |
| LIU Jian-qing,JIA Bao-jiang,YANG Ping,CHEN Yu-lu,PENG Bo,LI Zhen-jiang.2007.The Application of Carbon, Oxygen and Strontium Isotopes to the Study of Middle-Upper Jurassic Sequence Stratigraphy in Longweicuo Area, Qiangtang Basin[J].Acta Geoscientica Sinica,28(3):253-260. |
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