| 松辽盆地白垩系的密集段及海水进侵的新证 |
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| 引用本文： | 叶淑芬,魏魁生.松辽盆地白垩系的密集段及海水进侵的新证[J].地球科学,1996,21(3):267-271,T001. |
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| 作者姓名： | 叶淑芬 魏魁生 |
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| 作者单位： | Department of Energy Resources and Geology，China University of Geosciences，Beijing，100083 |
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| 基金项目： | 地质行业基金项目,自然科学基金项目 |
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| 摘 要： | 在总结松辽盆地白恶系层地层特征的基础上，阐述了密集段的地质学和地球物理学标志，经分析，大多数重要反射与密集段相关而并非是层序边界，根据扫描电镜分析结果，在密集段中首次发现了钙质超微化石，为区内白垩纪海水进侵的提供了新的证据，由稳定同位素分析，密集段形成了缺氧，相对可容纳空间最大及水体最深时期。
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| 关 键 词： | 密集段 氧同位素 地层 白恶纪 海水入侵 |
CONDENSED SECTION AND NEW EVIDENCE OF MARINE INUNDATION IN CRETACEOUS,SONGLIAO BASIN |
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| Ye Shufen Wei Kuisheng.CONDENSED SECTION AND NEW EVIDENCE OF MARINE INUNDATION IN CRETACEOUS,SONGLIAO BASIN[J].Earth Science-Journal of China University of Geosciences,1996,21(3):267-271,T001. |
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| Authors: | Ye Shufen Wei Kuisheng |
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| Abstract: | Based on the fundamental concept of sequence stratigraphy,the authors have summarzied the basic characteristics of nonmarine sequences and described the distinguishable features of condensed sections in lithology,paleontology,geophysics and geochemistry in Cretaceous of Songliao Basin. It is pointed out that several strong events are truly related to the condensed sections rather than sequence boundaries. Nannofossils,the new evidence for the influence of the open sea on the basin in Cretaceous,are firstly found by analysis of SEM. According to the analysis result of oxygen isotope stratigraphy,the condensed section is demonstrated to form in the deep water environment with high accomodation of poor oxygen. |
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| Keywords: | sequence condensed sections strong reflection nannofossil oxygen isotope |
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