查询词典 lacustrine

The Lower/Upper Cretaceous boundary in Songliao Basin is,therefore,between the Quantou and Denglouku formations,instead of between the Quantou and Qingshankou formations.2.The dark mudstones and shales in the Member 1 of Qingshankou Formation are of high organic carbon and low diasteranes contents.Organic geochemical characters are illustrated by biomarkers of 28,30-bisnorhopane and gammacerane,and positive excursion of kerogen isotopes.It is suggested that the dark mudstones and shales in the Member 1 of Qingshankou Formation are the products of lake anoxic period.It corresponds to the oceanic anoxic event at Cenomanian-Turonian boundary in Cretaceous.3.Based on the study of biostratigraphy,chronostratigraphy,magnetostratigraphy and event stratigraphy,a correlation of the lacustrine sequence to marine standard has been proposed,i.e.,the Quantou Formation corresponds to Cenomanian stage,Qingshankou Formation correlates to Later Cenomanian-Early Turonian,Yaojia Formation to Later Turonian-Coniacian,Nenjiang Formation to Santonian-Campanian.Sifangtai and Minshui Formations to Maastrichtian. 4.Analysis of lithology,lithofacies and microfossils of Cretaceous in Songliao Basin, shows that shore and shallow lake facies yield the most abundant microfossil groups,and the predelta and deltaic distributary plain facies rich in fossils as well.In the shore and shallow lake areas during the high level periods(such as Qingshankou and Nenjiang sedimentary periods),the lacustrine biota are of high diversity and high abundance.

因此，松辽盆地上、下白垩统的界线应在泉头组的底界，即泉头组与登娄库组之间，而不是泉头组的顶界。2、青山口组一段黑色泥岩、页岩具有有机碳含量高、重排甾烷含量低，生物标志物出现28，30—双降藿烷和伽马蜡烷，干酷根碳同位素具有正向偏移等有机地球化学特征，表征为青山口组一段黑色页岩、油页岩是古湖泊缺氧事件的产物，它对应于白垩纪古海洋Cenomanian—Turonian期界线附近缺氧事件，二者具同步性。3、通过生物地层学、年代地层学、磁性地层学和事件地层学研究，认为泉头阶大体相当于Cenomanian阶，青山口阶相当于晚Cenomanian—早Turonian阶，姚家阶对应于晚Turonian—Coniacian阶，嫩江阶对应于Santonian—Campanian阶，四方台阶和明水阶相当于Maastrichtian阶。4、通过对松辽盆地上白垩统的岩性、岩相及微体化石分析，认为滨浅湖相是微体生物群最为发育的相带，其次为三角洲前缘相和三角洲分流平原相。

From bottom to top, a complete terrigeous sequence in fault-depressed lacustrine basin consists of the following sequence units in turn: Sequence Boundary→Lowstand System Tract (no coast-onlap)→Trangressive System Tract (distinct coast-onlap)→Highstand System Tract being composed aggradational lacustrine mudstone with low sedimentation rate→Regressive System Tract (distinct coast-dropback)→Sequence Boundary.

断陷湖盆中一个完整的陆相层序自下而上依次由下列层序单元构成；层序界面→无湖岸上超的低水位体系域→湖岸显著上超的水进体系域→由沉积速率缓慢的垂向加积型湖相泥质岩构成的高水位体系域→湖岸显著退却的水退体系域→层序界面。

Three main methods with lacustrine carbonates have been used to reconstruct the lake water palaeo-temperature at present. First, the technique of isotopic geological thermometer, since being put forward to reconstruct sea-water paleo-temperature, was subsequently introduced into lacustrine carbonate sediments for constructing lake-water based upon the function relationship between lake-water temperature and the oxygen isotopic compositions of lacustrine carbonate and lake-water. Second, paleo-temperature of the lake-water can be reconstructed by determining Mg/Ca values of the lacustrine ostracode shells. And third, paleo-temperature of the lake-water can be reconstructed based upon the statistic model between the oxygen isotopic composition of lacustrine carbonate and the Lake-water temperature by testing the modem hydrogeological parameters and some relevant isotopic data of the lake basin.

目前利用湖泊碳酸盐对湖泊古水温进行重建主要有三种方式，一是运用同位素地质温度计原理，利用水温与湖泊碳酸盐氧同位素值和湖水氧同位素值三者之间的函数关系，对湖泊古水温做定量研究；二是通过测定介壳[Mg(上标 2+)]/[Ca(上标 2+)]进而重建古水温；三是通过测定湖泊流域范围内现代水文气象参数及一些相关的同位素资料直接建立起湖泊自生碳酸盐氧同位素值与温度间的统计模型。

The source rock is a set of grey and grey to dark calcareous mudstones of lacustrine, which were controlled by lacustrine depositional system.

烃源岩岩性为一套湖相的深灰色、灰黑色含钙质泥岩，明显受湖相沉积体系的控制。

The source rock is a set of grey and grey to dark calcareous mudstones of lacustrine, which were controlled by lacustrine depositional system (shallow-moderate-deep lake).

烃源岩岩性为一套湖相的深灰色、灰黑色含钙质泥岩，明显受湖相沉积体系的控制。

During the paleo-geography evolution, inland lacustrine basin began to form, and the two delta skirt in east and west lakeshore are primary formed in Chang 10, lacustrine basin subsidized quickly, lake district enlarged rapidly and destructive delta are developed in Chang 9, delta are more developed in Chang 8, lakeshore line move outward at large range, turbidite developed well near west lakeshore, delta range is decreased in east lakeshore in Chang 7, features of lacustrine basin are changed remarkably, deep lake and half deep lake area is decreased greatly, while delta sedimentary system is developed at its most in Chang 6, framewok is inherited better, but delta′s construction is slowed and is swamping at large scale in Chang 4+5, lacustrine basin began to be silting, shrinking and dying out, and riverway gradually developed well since Chang 3, distributary riverway developed best in Chang 2, because of imbalance subsidence, subsidence center is formed in east Zichang area and in which lacustrine turbidite is sedimented.

在古地理演化过程中，长10期内陆湖盆开始形成，东西两岸两大三角洲裙初步形成；长9期湖盆快速下沉，湖区迅速扩大，三角洲多为破坏性的；长8期三角洲进一步发育；长7期湖岸线大幅度向外推移，西部浊积岩发育，东部三角洲面积明显减小；长6期湖盆面貌发生了显著的变化，深湖－半深湖面积大大减少，三角洲沉积体系极为发育；长4+5期继承了长6的沉积格局，三角洲建设进程减慢，三角洲大面积沼泽化；从长3期湖盆开始逐步淤浅、萎缩、消亡，河道逐渐发育；长2期分流河道发育；长1期由于差异沉降，在东部子长一带形成沉降中心，沉积了湖相浊积岩。

The characteristics of sequence development, source reservoir - seal assemblage and types of hydrocarbon reservoir for each sequence were discussed in detail. The dark colored shale of deep lacustrine facies in the transgressive system tract of SⅡ sequence deposited around the maximum flooding surface is the main source rock in this area. The shale of shallow lacustrine facies in the TST of SⅢ sequence around the MFS is the most important regional seal rock.

结果表明，该区古近系可划分为SⅠ，SⅡ，SⅢ和SⅣ4个层序，分别对应于房身泡组、沙三段、沙一段沙二段和东营组。SⅡ层序水进体系域最大湖泛期沉积的半深湖深湖相暗色泥岩是研究区的主力烃源岩系；SⅢ层序水进体系域最大湖泛面附近的浅湖相泥岩是最重要的区域盖层。

The sedimentary environment divided in to fluvial deposit and lacustrine deposit. The sedimentary evolution of each depositional circle usually began with alluvial channel to fluvial deposit, and evolved into lacustrine deposit which is mainly made up of shore-shallow lake sedimentary model with relatively stirring hydrodynamic condition.

其沉积环境主要可以分为河流沉积和湖泊沉积两种类型，每一个沉积旋回都是以洪积扇到河流相沉积开始，向湖泊相沉积演化，湖泊沉积阶段主要以湖水相时动荡的滨浅湖沉积为主。

The study results show that:①The distribution of Cd in shallow surface soils is characterized as: The content of Cd in lacustrine deposit, alluvial lacustrine and alluvial-diluvial low-lying plain is 1.4 to 1.8 times as high as in alluvial-diluvial high valley flat and alluvial-diluvial high bank physiognomy areas.②The content variation of Cd in horizontal distribution was controlled by clay primarily and OrgC secondly. The variation of OrgC was major factor that affected the content variation of Cd in vertical distribution.

结果表明：①研究区浅层土壤中w的分布特征为，湖积低平原区、冲－湖积低平原区及冲洪积低洼平原区地貌成因类型土壤中的含量明显高于冲洪积高漫滩平原区、冲洪积高亢平原区地貌成因类型土壤，其质量分数差异达1.4~1.8倍；②研究区不同地貌成因类型土壤中，w的横向分布特征主要受黏粒含量分布的控制，其次是wC(下标 org；垂向分布特征的主要控制因素是wC

The sedimentary environment divided into fluvial deposit and lacustrine deposit. The sedimentary evolution of each depositional circle usually began with alluvial channel to fluvial deposit, and evolved into lacustrine deposit which is mainly made up of shore-shallow lake sedimentary model with relatively stirring hydrodynamic condition.

其沉积环境主要可以分为河流沉积和湖泊沉积两种类型，每一个沉积旋回都是以洪积扇到河流相沉积开始，向湖泊相沉积演化，湖泊沉积阶段主要以湖水相对动荡的滨浅湖沉积为主。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了