沉积盖层

含油气区沉积盖层中分布的成岩磁铁矿具有典型球粒状的特有矿物形貌标志，它们携带了较为稳定的化学剩磁（CRM）。

Diagenetic magnetites within sedimentary cover strata over oil or gas field are present primarily as spherical crystal aggregates that usually carry stable chemical remanent magnetization ( CRM ) .

它是江南&雪峰基底拆离推覆体由SE向NW方向水平挤压作用下中上扬子古生界盆地沉积盖层产生递进（衰减）变形的结果。

When the Jiangnan-Xuefeng basement decoupling nappe horizontally extruded from SE to NW , the sedimentary cover of Middle-Upper Palaeozoic basin progressively ( decreasingly ) deformed and resulted in kink structure .

通过合成地震图与大同余震记录的对比，证明可以利用P彼波列的特征定性地确定台站下沉积盖层和基底界面的大致速度结构特征。

It is demonstrated by using synthetic seismogram method and an example that the characteristics of P-wave-trains can be used to estimate the site structures under stations .

华北地区自早元古代结晶基底形成以后的沉积盖层发育演化可划分为五个阶段：拗拉槽克拉通边缘（Pt2Pt3）；

In northern China , evolution of the sedimentary sequences since formation of the early Proterozoic crystal basement can be divided into five stages , i.

认为R1界面不仅是结晶基底之顶界的反映，而且STD可能沿着R1界面展布，也即R1界面同时是一条沉积盖层和基底之间的拆离层。

It is suggested that the interface R1 not only marks the top of the crystalline basement but also represents the possible one , along which STD is spreaded , i. e. the R1 interface at the same time is a detachment between the sedimentary cover and the basement .

结果表明：震区地壳内8km以上速度结构横向非均匀性较强，反映了该区厚达数公里的沉积盖层介质特征；

The results show that velocity structure over the depth of 8 km is strongly and horizontally heterogeneous . Characteristics of sedimentary cover of several kilometers in this region is revealed .

盆地基底为华北板块的南缘，岩性主要由古生界组成，沉积盖层发育较全，厚达12000m，是一个中、新生代陆相沉积盆地。

The basement of the basin is the southern edge of the North china Plate , which lithologically consists of the Palaeozoic . As a Mesozoic and Cenozoic terrestrial facies sedimentary basin its cover is well developed with a thickness of 12000m .

层状沉积盖层变形的特殊性；

Deformation particularity of layered sedimentary mantle ;

宁镇山脉海相中、古生界沉积盖层内部存在多层滑脱系统。

The gliding-decollement systems at multiple levels took place within the Mesozoic-Palaeozoic marine sedimentary sequences .

在底基断裂之上的沉积盖层中，由于底基断裂的走滑挤压作用派生出次级应力场作用而发展，花状构造组合为油气运移和储集提供了有利的地质条件。

The flower-structure provides a favorable geological condition for the migration and traps of oil-gas .

区内沉积盖层主要为新近系的陆相和海相地层。

Sedimentary strata in this area mainly consist of Neogene continental strata and marine strata .

鄂尔多斯盆地边缘沉积盖层底部类冰碛岩的讨论

Tilloid at the bottom of the sedimentary covers on the margins of the Ordos Basin

这些控制着温度场和西西伯利亚沉积盖层中有机质成熟度的因素是全球性的。

These factors controlling temperature field and cap rock 's organic matter maturity are found globally .

世界上的沉积盖层有很大一部分是由古代三角州沉积所组成的。

A very large proportion of the world 's sedimentary cover is composed of ancient deltaic deposits .

另一种为重力成因，多为中、小型规模，且广泛发育于沉积盖层中。

For the second situation , fault is usually middle or small scope , and develops in sedimentary covers widely .

盆地沉积盖层由中生界三叠系、侏罗系、新生界第三系、第四系组成，侏罗系是其主要勘探目的层。

Sediment cover consists of Trias , Jurassic , Tertiary and Qaternary , but Jurassic is the mainly exploited stratum .

大庆外围盆地存在多套烃源岩层和多种类型的储层，各盆地区域构造条件不同，盆地的沉积盖层和成藏条件也不同。

A number of sets of hydrocarbon source rock and multi-type reservoirs exist in the surrounding basins of Daqing Oil ? eld .

详细论述了地壳深大断裂及盆地断块构造活动对沉积盖层中流体活动的影响。

The effects of the deep fractures of crust and block tectonic movements on the fluid migration in sedimentary cap rocks are elaborated .

重、磁资料综合解释结果为沉积盖层构造分区、基底断裂推断及火成岩岩性识别提供依据。

The result of gravity and magnetic interpretation provide inference of structural di - vision of the basement and distinguish of igneous rock .

由此可以认为伸展构造亦是控制统一变质基底与沉积盖层的形成机制之一。

Therefore , the extensional movement is also one of the mechanisms for controlling formation of the unifying metamorphic basement and sedimentary cover .

太行山山前中&新生代伸展滑脱的主拆离构造出现在早前寒武纪变质结晶基底和中元古代以后的沉积盖层之间。

The Meso-Cenozoic detachment zones in the front of the Taihang Mountains occur between the early Precambrian metamorphic crystalline basement and post-Mesoproterozoic sedimentary cover .

中生代火山岩的基底主要为加里东褶皱系，其上还有华力西&印支期沉积盖层；

The basement of Mesozoic volcanic rocks in Fujian Province is mainly in the Caledonian fold system and is laid over the Variscan-Indosinian sedimental cover .

虽然前陆盆地是世界上最重要和高产的含油气盆地类型，但油气田只保存于盆地有同造山期沉积盖层的范围内。

Although foreland basin is the most prolific basin type , hydrocarbon accumulations can only be preserved in regions where there are synorogenic sedimentary covers .

此外，估算磁源深度对于估计盆地沉积盖层的厚度和矿体的埋深也具有重要的意义。

In the interpretation of magnetic anomalies , information about depth of the magnetic source bodies tends to be very important , which is critical to geophysical and geological interpretation .

上地壳主要为绿片岩相（部分低角闪岩相）的板岩、千枚岩、片岩、变粒岩以及花岗岩组成，顶部为沉积盖层。

The upper crust is mainly composed of slates , phyllites , schists , granulite of greenschist facies ( partly low-amphibolite facies ) and granite intrusions , and sedimentary rocks at the top .

结合沉积盖层及浅层土壤的磁性、矿物及地球化学成分建立含油、气区地磁-地化相关模型，可能是利用磁法直接找油的一种全新的油气预测新方法。

The geomagnetic-geochemical model of oil and gas field based on magnetism of sedimentary cover strata and shallow soil along with mineral and geochemical composition may be a new method for oil and gas prediction .

一般而言只有结晶基底才有足够的强度积累大量的应变能然后突然释放形成破坏性地震，而沉积盖层则由于富含孔隙、流体因此较软弱而不能积累足够的能量形成大的地震。

In general , only basement rocks are strong enough to accumulate strain energy for destructive earthquake . While sediment layers are porous and full of fluids , thus they are too soft to accumulate enough strain energy .

受深部热流影响沉积盖层中的有机质成熟度较高，因而使得盆地北部油气富集程度高，目前已发现的油气田均集中在北部。

The caprock has higher organic maturity resulting from deeper geothermal flow , so oil and gas are enriched in northern Yanqi basin , which is evidenced by the fact that the discoveries so far took place in northern Yanqi basin .

塔北隆起北部正断层的成因模式揭示了塔里木盆地北部基底&盖层统一构造变形的关系，对解释中国西北地区挤压构造背景下沉积盖层局部引张构造变形具有重要的地质意义。

The genetic mechanism of the normal faults reveals the united relationship of deformation of the basement and the overlying formation , which is of important geological significance to explaining the local extensional deformation of the overlying formation in North-west China under compressional background .

总之，火山活动对沉积盖层呈二元结构的盆地的油气生成增加多种模式，使二元结构盆地存在有机生油机制、合成生油机制，同时也存在无机生烃机制。

The conclusion shows that the effect of a volcanic activity on a basin with two-component cap structure could increase or accelerate its hydrocarbon generation . The multiple models give rise to mechanisms of organic , synthetic and inorganic hydrocarbon generation in basins with two-component cap structures .