| 西藏层序地层研究进展 |
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| 引用本文：彭勇民,惠兰,谭富文,王全海.2002.西藏层序地层研究进展[J].地球学报,23(3):273-278. |
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| 基金项目:国家自然科学基金项目(4996200) |
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| 中文摘要:迄今为止，西藏区内所开展的层序地层分析主要涉及到中生代的二级或三级层序。基于露头剖面的沉积相、古生物、磁性地层以及地质事件的综合研究，探讨了三叠纪、侏罗纪和白垩纪的层序地层模式及其形成机制。现今所取得的进展主要表现在3个方面：①初步建立了区内中生代层序地层年代格架；②不同时代、不同类型盆地中的层序数量、结构与层序类型具有较大的差异；③层序地层与磁性地层的结合研究，取得了重要的成果。未来区内的层序地层研究应在3个方面展开；①高分辨率层序地层研究，树立株罗纪－第三纪海平面变化曲线；②探索层序地层填图新方法；③多岛弧造山模式和多机制的隆升模式等大陆动力学问题也是层序地层所遇到的新挑战。 |
| 中文关键词:中生代 层序地层 进展 西藏 |
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| Advances in Sequence Stratigraphy of Tibet |
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| Abstract:So far, analyses of sequence stratigraphy in Tibet have only been associated with second and third order sequences of the Mesozoic. Based on facies, paleontology, magnetism stratigraphy and geological events from outcrop sections, this paper has dealt with models and mechanisms of sequences from Triassic to Cretaceous. The advances made are as follows: ① Sequence frameworks are established for the Mesozoic. ② It is revealed that basins of different ages and types have remarkably different quantities, structures and types of sequences.③ Important achievements have been made by the combined studies of sequence and magnetism stratigraphy. The following three aspects are expected to develop in future in sequence stratigraphy of Tibet: ① High resolution sequence stratigraphy is to be used to build up the Jurassic Tertiary sea level curves of Tibet.② It is possible to apply sequence stratigraphy to new mapping. ③Sequence stratigraphy will be encountered with new challenges from continental dynamics of archipelago arc orogenic models and multi mechanism uplifting models. |
| keywords:Mesozoic sequence stratigraphy advance Tibet |
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