海侵体系域

区内缺乏低位域，层序由海侵体系域（TST）和高位域（HST）组成，并且海侵体系域不甚发育，高位域组成了层序的主体。

The sequences are only composed of transgressive systems tract ( TST ) and highstand systems tract ( HST ) because of lack of lowstand systems tract ( LST ), and in fact the sequences are mainly composed of HST because of poor development of TST .

在开裂高峰期或开裂向闭合转换期，海侵体系域与高位体系域优势均不明显，层序结构样式以TH型较多；

During the stage of opening peak or transition from opening to closing , the dominance of the transgression systems tract and highstand systems tract were not obvious and the sequence stratigraphic architecture styles were dominated by the TH style ;

认为烃源岩的富集层段主要位于H型样式的二级层序海侵体系域（TST）中，其中TST的三级层序样式中，T型数量较多或H型数量较少。

It is considered that enrichment of the source rocks is mainly located in TST of Pattern H ( Grade ⅱ transgressive sequence marine domain ), while in Grade ⅲ sequence of TST , the number of Pattern T is more and H is less .

海侵体系域表现为向上泥岩厚度加大、砂岩厚度减薄的叠置特点；

Dynamic Audio Frequency Domain Transgressive system tracts are characterized by thinning in sandstone thickness and thicking in mudstone thickness upward .

本区的石炭～二叠系层序，以海侵体系域为主，低位或陆架边缘体系域与高位体系域发育次之。

The transgressive systems tracts are the main part of the sequence for the Carboniferous-Permian . Lowstand system tract , shelf marginal systems tracts and highstand system tract account for a small proportion .

在建立区域层序地层格架的基础上，指出区域性主力烃源岩及盖层主要形成于超层序的海侵体系域；

Based on establishment of regional sequence stratigraphic framework , it is believed that the regional main source rocks and cap rocks would have been formed in the transgressive system tract of the supersequence ;

陆表海充填沉积的三级层序为二元结构，即下部为海侵体系域，上部为高水位体系域，缺少低水位体系域。

The third-order sequence of sediment filling in epicontinental sea is of dualistic structure , that is , the lower part is transgressive system tract and the upper high stand tract , lacking low stand tract .

层序1海侵体系域可细分为相带1和相带2，即，砂泥岩薄互层岩相和板状交错层理砂岩岩相。

The transgressive deposit of sequence 1 can be subdivided , from base to top , into two main facies : ( 1 ) thin-bedded sandstone alternating with thin-bedded mudstone ; ( 2 ) planar stratified sandstone .

对层序沉积演化特征的分析表明，该区层序1和层序2低位体系域不发育，其它层序均由低位体系域、海侵体系域和高位体系域组成。

According to sequence depositional evolution characteristics , others were made up of low system tract , transgressive system tract and high system tract except that sequence 1 and sequence 2 did not have low system tract .

在南口虎峪剖面中，海侵体系域砂岩地层与高水位体系域砂泥质白云岩和叠层石白云岩组成了较有规律的层序地层相序，可以作为混积岩系层序地层划分的典型代表。

In this section , the regular sedimentary succession composed of both the sandstone strata of the transgressive system tract and the sandy to muddy dolomite strata of the high-stand system tract enables the Dahongyu Formation to become an emblem on the sequence division of mixed rock system .

第二个层序为Ⅱ型层序，发育陆棚边缘体系域、海侵体系域和高位体系域，由陆棚、火山陆隆和浊流沉积组成。

The secondary sequence is type ⅱ sequence , including the continental shelf , the volcanic continental rise and the turbidity current deposits , which has the shelf marginal system tract ( SMST ), the transgression system tract ( TST ) and the high system tract ( HST ) .

盆地相区的低水位沉积体系域和海侵沉积体系域较发育，而高水位沉积体系域不发育；

In basin facies area , lowstand and transgression depositional system tracts occur quite widely , but highstand depositional system tract does not .

润滑剂及添加剂：边界润滑；第2个二级层序由海侵-高位体系域所构成。

The second second - order sequence boundary consists of transgressive and highstand systems tracts .

中部为次深海沉积，为海侵和高水位体系域；

The middle is bathyal-abyssal , which belongs to the transgression system tract ( TST ) and high system tract ( HST ) .