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local unconformity
相关语句
  局部不整合
     Marked by the local unconformity and sedimentary transformation base,Qingshankou Formation can be subdivided into 4 third-order sequences.
     以局部不整合、沉积转换面为标志 ,青山口组可划分出 4个三级层序。
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  相似匹配句对
     Local Activities
     地方动态
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     LOCAL ANESTHETICS
     局麻药
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     Observation and study of unconformity
     不整合的观察和研究
短句来源
     Marked by the local unconformity and sedimentary transformation base,Qingshankou Formation can be subdivided into 4 third-order sequences.
     以局部不整合、沉积转换面为标志 ,青山口组可划分出 4个三级层序。
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The Wuliyasitai faulted basin,a typical faulted basin in Erlian basin group,is bounded by a listric normal fault on the northwestern side of the basin,with very thick marginal fan complexes indicating contemporaneous sedimentation along the faults.It is infilled with Jurrasic and Early Cretaceous sediments of up to 5 000 m in thickness which a series of different scale hiatuses and tectonic events have been discerned during hydrocarbon exploration in the basin.In this present paper the principle and method...

The Wuliyasitai faulted basin,a typical faulted basin in Erlian basin group,is bounded by a listric normal fault on the northwestern side of the basin,with very thick marginal fan complexes indicating contemporaneous sedimentation along the faults.It is infilled with Jurrasic and Early Cretaceous sediments of up to 5 000 m in thickness which a series of different scale hiatuses and tectonic events have been discerned during hydrocarbon exploration in the basin.In this present paper the principle and method of high-resolution sequence stratigraphy are adopted to deal with seismic reflection profiles and well logs data.the various orders of sequence boundaries have been identified and the sequence stratigraphic framework of Wuliyasitai faulted basin has been reconstructed.According to regional and local unconformity and corresponding conformities,the basin infillings of the basin may be subdivided into two tectonic sequences,represented by J 1~J 2 (TC1)and K 1(TC2)rifting type filling sequences,respectively,which constituted two proto-type basins developing in two rifting stages,among which the major infilling sequence TC2 may be further subdivided into four sequence sets and eleven sequences.Generally,the boundaries of tectonic sequences were regional unconformities,and the unconformity boundaries of sequence sets can be traced on a basin scale ,while the unconformity boundaries of sequences only developed in basin margins or intrabasin uplift,which merged into conformity boundaries toward center part of basin.Based on the sequence stratigraphic framework,sequence system tracts that are characterized by one-lay type system tract,often developed in initial and final evolution phrases of basin,and the two-lay type system tracts consisting of fining-upward tract,i.e,expanding lacustrine system tract and coarsening upward tract,i.e,contraction lacustrine system tract have been reconstructed.Unlike depositional systems of sea basin, in lacustrine basin like the Wuliyasitai faulted basin subaqueous fan, deep lake turbidite fan and fan delta developed generally in highstand phrase of lake level. Basin tectonic subsidence rate and total subsidence rate computed by backstripping method show three changes from fast to slow,which corresponds with three sequence sets stated above,indicating that the basin underwent thee stretching episodes during synrifting stage,which have been interpreted asa result of a multiple stretching of the lithosphere.The episodic tectonism of the basin,showing clear relationship to depositional fillings of the basin,is a major controlling factor of the formation of higher-order sequences in the basin,such as tectonic sequence and sequence sets,and controlled the development of sequences to a certain content.The conclusions have been applied to the prospect of reservoir and hydrocarbon source-rock distribution and lithologic-stratigraphic traps in this basin,and proved to be effective.

应用高分辨层序地层学分析的原理和方法,通过地震反射剖面和测井等资料的综合分析,揭示了盆地内部各级层序界面,建立了乌里亚斯太断陷盆地的层序地层格架。通过盆地的充填记录、构造特征和盆地的沉降史等信息,论证了该盆地经历了不同级别构造事件控制下的幕式演化过程。幕式构造运动是盆地内高级别层序发育的主控因素,与盆地的沉积充填具有良好的响应关系。一个裂陷期与盆地内部的一级层序相对应,并控制了盆地原型的构成;一个裂陷期内不同的裂陷幕控制了盆地原型内二级构造层序的发育;而三级层序的发育受控于低级的幕式伸展事件。此外,文章还通过层序内部结构分析,阐述了该湖盆体系域的构成模式。

Yishu graben is a typical transform-extensional basin. This graben is bounded by a steep dipping transform fault on the northwestern side and subparal lel normal faults on the southeastern side, with very thick marginal fan complex es indicating contemporaneous sedimentation along the faults. It is infilled wit h Tertiary sediments of up to 6000m thick, in which a series of different scaled hiatuses and tectonic inversion events have been discerned during hydrocarbon e xploration in the basin. According to...

Yishu graben is a typical transform-extensional basin. This graben is bounded by a steep dipping transform fault on the northwestern side and subparal lel normal faults on the southeastern side, with very thick marginal fan complex es indicating contemporaneous sedimentation along the faults. It is infilled wit h Tertiary sediments of up to 6000m thick, in which a series of different scaled hiatuses and tectonic inversion events have been discerned during hydrocarbon e xploration in the basin. According to regional and local unconformity and corres ponding conformities, the basin infilling of the graben may be subdivided into t hree tectonic sequences, among which the major infilling sequence TS2 may be fur ther subdivided into three sequences sets and fourteen sequences. Based on the s equence stratigraphic framework, depositional system tracts that are characteriz ed by marginal fan complexes on both sides of basin and deep or shallow lacustri ne deposits in the central part are reconstructed. The subsidence curves show th at the graben had undergone several rapid subsidence episodes, which have been i nterpreted as result of a multiple stretching of the lithosphere. Integrative an alysis of the depositonal structural features shows that regional tectonic stres s system experienced a transformation from dextral tenso-shear, through thermal subsidence to sinistral compresso-shear under a general extensional background. The composite mechanism of extension and transform dominated the graben evolutio n and affected to depositional infilling style in different evolutionary stages, the spatial configuration of depositional system and its relationship with unco nformities. The conclusions have been applied with some success to prospection o f reservoir and hydrocarbon source-rock distribution and lithologic-stratigrap hic traps in this basin.

伊舒地堑是一典型的转换伸展型盆地,它以构造上和沉积上的不对称结构,沉降中心的明显迁移和快速沉降充填为主要特征。本文应用盆地充填记录、盆地构造格架和盆地沉降史分析论证了伊舒地堑构造演化过程中不同级别的幕式裂陷作用,确定了幕式裂陷作用的沉积响应。此外,文章还总结了3种类型的沉积体系域构成样式和沉积特征

On the basis of the larger regional unconformity,Changling depression can be divided into 2 second-order sequences of Quantou Formation-Qingshankou Formation and Yaojia Formation-Nenjiang Formation.Marked by the local unconformity and sedimentary transformation base,Qingshankou Formation can be subdivided into 4 third-order sequences.In Daqingzijin region situated in front of the deltaic sandstone body of Baokang,sandstone bodies are widely spread in sequence S1 and S2 of lowstand system tracts which are...

On the basis of the larger regional unconformity,Changling depression can be divided into 2 second-order sequences of Quantou Formation-Qingshankou Formation and Yaojia Formation-Nenjiang Formation.Marked by the local unconformity and sedimentary transformation base,Qingshankou Formation can be subdivided into 4 third-order sequences.In Daqingzijin region situated in front of the deltaic sandstone body of Baokang,sandstone bodies are widely spread in sequence S1 and S2 of lowstand system tracts which are main oil-bearing strata in that region.Sequence stratigraphy does not only control the type of oil and gas accumulation but also control the nature of oil bearing.600/0 of industrial oil and gas wells are estimated to locate in the low level system tracts.

根据较大的区域不整合 ,长岭凹陷可以划分为泉头组 -青山口组和姚家组 -嫩江组两个二级层序。以局部不整合、沉积转换面为标志 ,青山口组可划分出 4个三级层序。位于保康三角洲砂体前缘带的大情字井地区 ,在层序S1和S2低位体系域中砂岩分布广泛 ,为该区的主要含油层段。层序地层不仅控制油气藏的类型 ,而且还控制含油性。据统计 ,6 0 的工业油气井位于低位体系域

 
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