地学前缘 ›› 2012, Vol. 19 ›› Issue (1): 51-57.

• 论文 • 上一篇    下一篇

试论湖相高频旋回水下间断面的成因：揭示湖盆短期沉降过程的突破口

王冠民, 吴智平, 陈清华   

  1. 中国石油大学（华东） 地球科学与技术学院， 山东 青岛 266555
  • 收稿日期:2011-11-15 修回日期:2011-12-01 出版日期:2012-01-10 发布日期:2012-01-10
  • 作者简介:王冠民（1969—），男，教授，从事沉积学方面的教学与研究。E-mail：wguanmin@sina.com
  • 基金资助:

    中央高校基本科研业务费专项资金项目（09CX04010A）

Brief discussion about formation cause of underwater discontinuity surface in lacustrine highfrequency cycle： Breakthrough of revealing the shortterm subsidence of lake basin.

  • Received:2011-11-15 Revised:2011-12-01 Online:2012-01-10 Published:2012-01-10

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摘要：

在湖相条件下，常发育沉积水体单一向上变浅的高频旋回，旋回底部为水下间断面，间断面之上的古水深迅速增大。在陆相层序地层学研究中，常将这类间断面直接归为古气候变化引起湖泛和物源后退形成的水下无沉积作用面。但这种认识目前还难以得到圆满的解释，而如果将其归为盆地短周期的间歇性构造沉降成因似乎显得更为合理。针对湖相高频旋回水下间断面的成因研究，不仅可以进一步探讨盆地短周期的构造活动方式及其对湖相高频旋回沉积过程的影响，也为在湖相条件下更好地应用米兰柯维奇旋回理论提供研究基础。

关键词: 湖相, 高频旋回, 水下间断面, 无沉积作用, 幕式构造沉降

Abstract:

 Highfrequency cycle of upwardshallowing often develops in lake facies. Underwater discontinuity surface， located at the bottom of cycle， above that paleobathymetry rapidly increases. In continental sequence stratigraphy study， this kind of discontinuity surface is usually directly attributed to ancient lake flooding caused by climate change and underwater nondepositional surface formed by source back. However， this understanding is still difficult to get a satisfactory explanation， and it seems more reasonable if it is classified as results of the basins shortcycle intermittent tectonic subsidence. The research of underwater discontinuity surfaces formation cause in lacustrine highfrequency cycle， not only further explore the basins shortperiod tectonic activity patterns and its influence on lake sedimentation in the highfrequency cycle， but provide research base for better application of Milankovitch cycle theory in lake facies.

Key words: lake facies, highfrequency cycle, underwater discontinuity surface, nondepositional, episodic tectonic subsidence

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