| 强迫型海退及强迫型海退楔体系域--对传统Exxon层序地层学模式的修正 |
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| 引用本文： | 梅冥相,杨欣德.强迫型海退及强迫型海退楔体系域--对传统Exxon层序地层学模式的修正[J].地质科技情报,2000,19(2):17-21. |
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| 作者姓名： | 梅冥相 杨欣德 |
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| 作者单位： | 中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 中国科学院资助项目，国家攀登计划，49802012，SS ER，， |
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| 摘 要： | 传统Ｅｘｘｏｎ层序地层学模式把层序界面定义在下降拐点，低水位体系域则位于类型Ⅰ层序之底，且低水位体系域（ＬＳＴ）被定义为海平面相对下降期至初始上升阶段的产物；但是，在建立海平面变化曲线时，又假定层序界面位于海平面变化的最低点，从而造成层序地层学概念体系的下连贯性。强迫型海退被定义为与沉积物注入无关，而与相对海平面下降相关的滨线向海方向迁移的海退过程，由此而产生的一系列沉积体则构成强迫型海退楔体系域
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| 关 键 词： | 强迫型海退 强迫型海退楔体系域 层序地层学 |
FORCED REGRESSION AND FORCED REGRESSIVE WEDGE SYSTEM TRACT: REVISION ON TRADITIONAL EXXON MODEL OF SEQUENCE STRATIGRAPHY |
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| Mei Mingxiang,Yang Xinde.FORCED REGRESSION AND FORCED REGRESSIVE WEDGE SYSTEM TRACT: REVISION ON TRADITIONAL EXXON MODEL OF SEQUENCE STRATIGRAPHY[J].Geological Science and Technology Information,2000,19(2):17-21. |
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| Authors: | Mei Mingxiang Yang Xinde |
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| Abstract: | In traditional Exxon of sequence stratigraphy,sequence boundary is defined at the inflection point of sea-level,so the low-stand system tract(LST) resulted from the sedimentation during the relative falling and initial rising period of sea-level changes constitutes the bottom unit of type I sequence.In the process of establishing an eustatic curve,sequence boundary is supposed to be formed at the lowest point of sea-level changes,which leads to the non-continuity of the concept system.Forced regression refers to the regressive process related to the relative falling of sea-level changes,which is distinctive from the normal regression resulted from the bayline migration to basin direction formed by sediment over injection.If sequence boundary is placed at the lowest of sea-level changes,type I sequence consists of four system tracts,namely low-stand progressive wedge system tract (LPWST),transgressive system tract(TST),high-stand system tract (HST) and forced regressive wedge system tract (FRWST).This revision of traditional Exxon model of sequence stratigraphy could overcome its non-continuity of concept system,which could get more reasonable explanation on many controversional problems and could provide the theoretical basis that will lead to the improvement of working method. |
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| Keywords: | forced regression forced regressive wedge system tract sequence stratigraphy |
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