石油与天然气地质 ›› 2003, Vol. 24 ›› Issue (2): 126-129,135.doi: 10.11743/ogg20030205

• 油气地质 • 上一篇    下一篇

徐家围子断阶带对火山岩体和沉积相带的控制

程日辉1, 王璞珺1, 刘万洙1, 单玄龙1, 陈树民2   

  1. 1. 吉林大学地球科学学院, 吉林长春, 130061;
    2. 大庆油田勘探开发研究院, 黑龙江大庆, 163712
  • 收稿日期:2002-04-16 出版日期:2003-06-25 发布日期:2012-01-16
  • 基金资助:

    国家自然科学基金资助项目(编号:49894190-12)

VOLCANIC MASSIF AND SEDIMENTARY FACIES BELTS CONTROLLED BY XUJIAWEIZI FAULT TERRACE BELTS IN SONGLIAO BASIN

Cheng Rihui1, Wang Pujun1, Liu Wanzhu1, Shan Xuanlong1, Chen Shumin 2   

  1. 1. College of Earth Sciences, Jilin University, Changchun, Jilin;
    2. Daqing Institute of Exploration and Development, Daqing, Heilongjiang
  • Received:2002-04-16 Online:2003-06-25 Published:2012-01-16

PDF (PC)

699

被引次数

61

摘要：

徐家围子断陷在晚侏罗世-早白垩世期间从断陷边缘至断陷中心形成一系列的断阶带,控制断阶带形成的同沉积断层也分割了凸起带、斜坡带和凹陷带等次级盆地单元。徐家围子断陷的次级构造单元在断陷北部和南部存在差别。北部区由东、西两个半地堑组成,而南部区由3个半地堑组成。每个半地堑一般是由盆缘凸起带、陡坡断阶带、凹陷带和缓坡或缓坡断阶带组成,半地堑之间为次级凸级。断阶带的发育控制了盆地自边缘至凹陷的地形,因此控制了沉积相类型与分布;同时断裂活动引发的或与断裂活动伴生的火山活动导致火山物质的盆地充填,改造或塑造盆地次级单元构造样式和盆地地形,因此也控制沉积相类型与分布。徐家围子断陷的断阶带控制了火山岩体和沉积相带的分布,这种控制作用受多种因素影响,并非单一机制所能解释。

关键词: 断阶带, 火山岩体, 幕式活动, 沉积相, 分布, 松辽盆地

Abstract:

A series of fault terrace belts were found in Xujiaweizi fault depression, from the margin to the center of the depression, in late Juassic to early Cretaceous.The synsedimentary faults,controlling the generation of fault terrace belts,segmented the secondary geological units,such as uplift belt,slope belt and hollow zone.Xujiaweizi fault-depression can be divided into north and south regions:the former consists of west and east two half-grabens;while the latter is composed of three half-grabens.Each half-graben generally consists of basin-margin uplift,steep-slope fault terrace,hollow zone and gentle-slope fault terrace.There is a secondary uplift between two half-grabens. The development of fault terrace belts controlled the topographies from the margin to the sag in the basin, and hence controlled the types of depositional facies and their distributions,too. Moreover, volcanic activities induced by faulting or associated with faulting resulted in the infilling of volcanic materials in the basin,and the transformation of secondary tectonic pattern and topography in the basin, which would, therefore, controlled the types and distribution of sedimentary facies.It is susgested that the distribution of volcanic massifs and sedimentary facies have been controlled by the fault terraces in Xujiaweizi fault depression.Such control should have been affected by multiple factors, and cannot be easily explained with a single meachanism.

Key words: fault terrace belt, volcanic massif, episodic movement, sedimentary facies, Songliao basin

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