查询词典 sediments

Further analysis on the pyrogenic PAHs of the Huangpu River sediments discovered two major sources of vehicular exhaust and coal combustion, the contributions of which were quantified as 30% and 27%, respectively.

黄浦江流经上海市区，以燃烧源PAHs污染为主，在不同河段具有不同类型的燃烧源，上游河段PAHs污染主要源于草本植物、木材和煤的不完全燃烧，中下游河段PAHs污染主要来源于油类的燃烧。

In this area seven microfacies in the Chuangde Fm. red beds can be separated. They are: 1 reddish foraminifera grainstone; 2 reddish microfossils packstone/wackestone; 3 reddish marlstone with microfossils; 4 reddish marlstone; 5 red to variegated floatstone ; 6 reddish shales; 7 reddish radiolarite/ radiolarian chert.In the Yamudok Cuo area, it can be distinguished six microfacies in the redbeds including 1 reddish foraminifera grainstone; 2 reddish microfossils marlstone; 3 reddish shales; 4 yellow-grayish floatstone ; 5 reddish radiolarian chert; 6 reddish chert with radiolaria. The depositional environment of the Chuangde formation can be interpreted from sediments composition, as is deep oceanic basin adjacent to continental slope/rise. The slope/rise setting is indicated by the occurrence of olistoliths and slumped pelagic/hemipelagic limestone, present near the top of the Chuangde Fm.

进一步资料对比研究表明，全球上白垩统海相红层具有以下特征：a上白垩统红层出现在北大西洋、阿尔卑斯、喀尔巴阡、土耳其，向东一直到特提斯喜马拉雅地区和澳大利亚西北角的Exmouth海底高原，横贯整个特提斯和北大西洋；b沉积环境以外陆棚-斜坡和盆地为主，在斜坡环境下多发育有浊流沉积，如Scaglia Rossa和Nietrental组；c有机碳含量普遍很低，0～0.3％之间；d盆地相仅发育红色泥质岩，而斜坡和远洋环境下不仅发育红色页岩，同时还有红色泥灰岩、红色灰岩和红色硅质岩；e北大西洋和地中海地区在Cenomanian-Turonian界线黑色页岩之后不久的Turonian早期就出现红色沉积，而藏南出现在Santonian早期，Exmouth出现在Campanian早期，红层出现似乎有&西早东晚&的趋势。

The results indicate that the distribution of gross amount of REE in surface sediments well corresponds to that of the sediment types.

结果表明，表层沉积物中稀土元素总量的分布与沉积物类型有良好的对应性。

The metal elements of the volcanic-hosted massive sulfide deposit have two sources, the copper and zinc are derived from rhyolitic magmas whereas the lead are probably related to old sediments overlying the rhyolites.(4) It is suggested here that the volcanic rocks hosting massive sulfide deposit in the north Qilian orogen, which are previously considered as a bimodal suite of Neo-proterozoic to middle Cambrian age in a continental rift, are virtually related to subduction magmatism in Ordovician age, and there might have no continental rift magmatism of Neo-proterozoic to middle Cambrian in the north Qilian.

Th/Ta比高(5.0～11.7)，εNd为较大的负值(-2.6～-8.4)，流纹岩的形成可能是两个端元组分混合的过程、或是上地壳混染的结果，形成在活动陆缘环境；(3)北祁连块状硫化物矿床成矿金属物质具有两种来源，Cu、Zn等来源于流纹岩，而Pb的来源可能与古老沉积物有关；(4)本文认为，前人厘定的北祁连新元古代-中寒武纪赋存块状硫化物矿床的大陆裂谷双峰式火山岩应是与俯冲作用有关的奥陶纪火山岩，说明北祁连可能不存在新元古代-中寒武纪的大陆裂谷活动。

Seed, in situ dropped from the rooted aquatic plant and by the deposition of well laminated lacustrine sediments. The lake level thereafter became deeper than 4 m so that Ruppia L.

烧失量研究结果清楚显示：黄旗海从全新世早期起进入了稳定的湖泊发展阶段后有机生产率显著上升，自生碳酸盐产量同步大幅度增长。

When the culture medium was the mixture of lake water and sediments, the average absorption velocity of DP was 2 ng for per 10000 Microcystis aerugilnosa and 7.6 ng for per 10000 Scenedesmus obiquus respectively everyday. And the average increasing velocity was 1.19×10~5 per mL and 3.7×10~4 per mL respectively everyday.

在沉积物和湖水作培养基的情况下，每1万个微囊藻吸收水中的溶解性磷的平均速率约为2ng／天，斜生栅藻约为7.6ng／天，微囊藻和栅藻的平均增长速率为1.19×10~5个／mL·d和3.7×10~4个／mL·d。

Based on the analysis of the contents of Cu, Pb, Mn, Zn, and Cr in the rhizosphere sediments of Phragmites australis and Scirpus mariqueter at tidal flat in Changjiang Estuary, the following conclusions can be drawn.

长江口滨岸潮滩芦苇与海三棱草根系、茎叶以及根际沉积物中Cu、Pb、Mn、Zn、Cr的含量分析发现，Cu、Pb、Zn、Cr在根系中的含量较高，而Mn在茎叶中的含量达到总量的55%以上。

The results of the examine indicated that Scirpus mariqueter disturbed the phosphorous distribution by drawing phosphate from sediments and microbial degradation which formed the horizontal and vertical concentrational grads.

实验结果表明，海三棱藨草通过根系对磷的吸收和自身有机质降解，在沉积物里形成了水平的和垂直的浓度梯度，干扰了磷的正常累积和迁移。

In the two lake sediments, the character of d(001) peak shape of smectite changes in fine correspondence with sediment layers.

。泸沽湖和草海沉积物中蒙脱石d(001)峰形的变化与分层层理之间存在着比较好的对应关系。

Clay minerals in the surface sediments of the central and southern South China Sea are illite, smectite, kaolinite and chlorite and their average percent contents are in tune 47%, 19%, 17% and 16%.

南海中南部表层沉积物中的私土矿物组合类型为伊利石－蒙脱石－高岭石－绿泥石，含量平均值依次为47%、19%、17%和16%。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。