查询词典 sediments

Sedimentary facies model for mixed sediments of recent reefoid carbonates and siliciclastics is developed from the facies model of fringing and barrier reefs. Based on the sedimentary facies and textures, mixed sediments may be subdivided into 5 types as follows: 1 reef base mixed sedimentary rocks and reef framework mixed sedimentary rocks; 2 reef flat sand-gravel mixed sedimentary rocks; 3 backreef beach-dune gravel-sand mixed sediments; 4 backreef lagoonal sand mixed sediments ; and 5 reef front littoral sand mixed sediments.

礁源与陆源混合沉积相模式是从岸礁一堡礁相模式基础上发展而来，根据其沉积相和沉积结构特徵可以分为5种混合沉积：①礁基混积岩和礁格架混积岩；②礁坪砂砾屑混积岩；③礁后海滩－沙提砾砂屑混合沉积；④礁后泻湖砂屑混合沉积；⑤礁前浅海砂屑混合沉积。

Sediments of this system were sequentially extracted in natural granularity. The result showed that there was a good linear relationship between organic matter and org / bact P contents in sediments. This organic matter in sediments was the source of org / bact P. The total phosphorus in sediments dominated the content of total dissolved phosphorus and phosphate in interstitial water. In addition, there were good relatiohships between total phosphorus in sediment and the total dissolved phosphorus in interstitial water, and between total phosphorus in sediment and phosphate in interstitial water. FeP and AlP in sediments were correlative with Eh and phosphate in interstitial water, respectively. This showed that the FeP and AlP contents were affected by Eh in interstitial water and the total content of FeP and AlP dominated the content of phosphate in interstitial water.

对沉积物—间隙水中磷形态的连续提取分析发现，自然粒度下，沉积物中有机质含量与沉积物中有机/细菌聚合磷存在很好的线性相关性，说明沉积物中有机质是有机/细菌聚合磷的源；沉积物中总磷决定间隙水中总溶解性磷和溶解性磷酸盐的含量，并且总磷与间隙水中总溶解性磷和溶解性磷酸盐存在很好的相关性；沉积物中FeP和AlP分别与间隙水中的Eh和溶解性磷酸盐存在相关性，说明Eh的大小严重影响FeP和AlP的含量，但是FeP和AlP含量之和又主导着间隙水中溶解性磷酸盐的含量。

The deep water deposition means the deposition in the area where the water depth is larger than 30 meters, in which the major sediments are coarse sand and gravel. This kind of deposition is the relic deposition formed by the Pleistocene alluvial-lacustine deposition reworked under modern channel currents actions, and ususally the Holocene acummulation lack in the deep waters. The transitional zone deposition is the deposition between the low tidal level line and the 30 meters isobath, where the sediment types is changeable and the grain sizes are gradually coarsening from the low tidal line to the deep water area. This kind of deposition is developed by the deep water eroded sediments sorting under the transitional zone current action. The different types distributed along the isobath. The tidal flat deposition is the fine sediment deposition on the tidal flat which is flo sedimentation of the silty clay under the tidal flat dynamic action and ususally developed fluid mud on the lower tidal flat. The channel mouth deposition is the deposition in the channel mouth area. According to the sediment types, it includes sand deposition where there are coarse sediments supply and silt deposition where there are only fine sediments surpport.

峡道深水区沉积是指水深大于30米的峡道底部沉积，它以粗颗粒砂砾石沉积为特色，是现代峡道水动力对第四纪海退时发育的冲洪积和坡积物进行改造形成的蚀余沉积，全新世沉积地层往往缺失；峡道过渡带沉积是指水深介于低潮位线至30米水深线之间发育的峡道边坡沉积，该带沉积以沉积物类型多样为特色，自低潮位线至30米水深线，沉积物粒级逐渐变粗，由粉砂质粘土逐渐递变为中粗砂，是峡道深水区沉积物经多次分选沉积而发育的，基本平行于等深线分布的条带状沉积，在岸坡较陡岸段，过渡带下部可发育重力沉积；峡道潮滩沉积是指在低潮线与海岸线之间发育的细颗粒沉积，它是粘性细颗粒泥沙在潮滩动力作用下，发生动水絮凝沉积而形成的粉砂质粘土沉积，在低潮滩可发育浮泥；峡道口门区沉积则是在峡道汇入大海或海湾时，在峡道出口水流影响所及范围的沉积，根据峡道口门区供给泥沙的特性，峡道口门区沉积有粉砂质淤泥沉积和砂质沉积两种类型。

The AVS-SEM distribution in the sediments of Guanting Reservoir and Yongding River was studied and the metal concentration in the water above the sediments and the pore water was measured. Based on the results, the reaction between the sediments and metal ions were discussed and the heavy metal pollution of the sediments in Guanting Reservoir and Yongding River was evaluated preliminarily.

官厅水库沉积物，由于处于缺氧性环境，沉积物中的酸可挥发性硫化物控制着大多数金属离子在沉积物和孔隙水两相间的分配，本文通过现场采样，分析了官厅水库和永定河沉积物中的AVS—SEM的分布，同时测定了沉积物上覆水以及部分样点的孔隙水中的重金属浓度，探讨了沉积物与重金属离子的作用；并根据采样分析结果对官厅水库及永定河沉积物中的重金属污染做了初步评价。

The results showed that pH of the irradiated sediment core is higher than the unsterilized one,and microorganisms could have an effect on the pH of sediments.All the four sediments are in the strong reductive environment at the depth of 7～30 cm,and the values of Eh are quite closer,the main factor that affect the redox environment may be the compaction of the sediment.All the sediments had a cumulation of phosphorus at the surface layer,and the total phosphorus of the sediments at the depth of 4～10 cm are lower than the average.It is indicated that phosphorus had been redistributed at the suface layer.

本研究采集太湖梅梁湾沉积物，通过印Co.y射线辐照、添加可溶性淀粉等处理研究微生物活性对太湖沉积物pH，Eh及总磷分布影响，以揭示微生物在湖泊沉积物中的沉积后作用，为探索富营养化湖泊表层沉积物磷的归趋提供理论基础。1 材料与方法1.1 样品采集和处理2005年1 1月，采用自制的柱状采泥器采集太湖梅梁湾沉积物，采样位点为31.30.306 N.120.13.370 E，采集后立即带回实验室，其理化性质见表1。

According to the literatures about the gold contents in crust, rocks and sediments published in recent 15 years and a huge amount of reliable analytical data in the study about crust and rocks accumulated, it is recommended that the gold abundance in the crust and in the exposed crust are 1.0 and 0.8 ng/g, the average contents of gold in rocks, igneous rocks, sedimentary rocks and metamorphic rocks are 0.9, 0.6, 1.0 and 1.0 ng/g, the average contents of gold in stream sediments, flood plain sediments, shallow sea sediments and soils in China are 1.4, 1.6, 1.2 and 2.0 ng/g, respectively.

根据近15年来发表的大量有关金在地壳、岩石和沉积物中含量的文献，结合作者在地壳与岩石研究中积累的金的大量可靠数据，综合给出金的地壳丰度为1.0ng/g，出露地壳丰度为0.8ng/g，金在岩石、火成岩、沉积岩和变质岩中的平均含量分别为0.9、0.6、1.0和1.0ng/g，金在中国水系沉积物、泛滥平原沉积物、浅海沉积物和土壤中的平均含量分别为1.4、1.6、1.2和2.0ng/g。

This paper mainly examined the longterm variations in the grain size of bottom sediments since the 1950s at Datong, the landward limit of the Yangtze Estuary. There is an increasing trend in grain size (〖WTBX〗d〖WTBZ〗50) of bottom sediments from 1977 to 2004 mainly in response to a sustained decrease in suspended sediments from upstream.

主要研究长江潮区界大通断面20世纪50年代以来床沙粒径的长期变化。1977~2004年床沙粒径(〖WTBX〗d〖WTBZ〗50)有一稳定增大的趋势，这主要是对上游河道悬沙来量持续减少的响应。

Distribution of biogenic silica content in surface sediments from deep water areas showed that it could not only reflect the paleoproductivity of siliceous micropaleontology in surface waters, but also indicate the strong or feeble upwelling. Thus, it was further confirmed that using biogenic silica content in sediments to trace upwelling and its change was effective and reliable. The analyzed result showed that radiolaria and poriferous specula have more contribution for biogenic opal, comparing with diatom in surface sediments from the northern studied area, probably owing to the diatom dissolved easily away and eaten by other organisms with little effort.

深水区表层沉积物中生物硅的含量分布表明，其不仅能反映出表层水体中硅质生物的古生产力水平，而且还能指示上升流的强弱，从而进一步证实了利用沉积物中生物硅含量来追踪上升流发育和变化的有效性与可信度研究结果还显示，在研究区域中北部表层沉积生物硅中放射虫和海绵骨针较硅藻占有更大的比重，这可能是由于硅藻易被溶解并易被其他生物体摄食的缘故。

Based on the complexity of the sources for the sediments in the Okinawa Trough, the sequential extraction procedure was applied to the hydrothermal influenced sediments in the core H9 recovered from the middle Okinawa Trough. Five fractions, including exchangeable, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual were acquired. Based on detailed analysis for major, minor and rare earth element compositions, the distributions of the elements in various speciations of the sediments were determined and the controlling mechanism was discussed. The variations of hydrothermal signatures in the core, partitioned from the terrigenous, volcanic and biogenic materials, have been demonstrated and the accumulation rates of some elements were evaluated.

本文针对冲绳海槽多种物源沉积作用混杂的特征，采用顺序淋滤萃取方法对海槽中部受热液活动影响的H9岩芯沉积物进行了分离，将沉积物中分为可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态五个部分，并对各个结合态中常量、微量和稀土元素组成进行了分析，确定了不同元素在不同结合态中分配的比例，分析了控制不同元素进入沉积物的主要机制。

Deep-water carbonate sediments include allochthonous carbonate sediments released from shallow water by gravity flow and carbonate contourite arid static autochthonous deep sea carbonate sediments.

深水碳酸盐沈积包括深水重力流作用形成的异地沈积和非重力流沈积，在非重力流沈积中又有深水牵引流（等深流、内波、内潮汐等）沈积和静态原地碳酸盐沈积。

The small blue capacitor has very high chances to go fully shorted compare to electrolytic capacitor which is very rare.

小蓝电容器具有很高的机会去充分地缩短了比较电解电容器，这是非常罕见的。

In the Italian campaigns of 1513 and 1515, when the Swiss won the victories of Novara and Marignan, he acted as army chaplain.

在意大利的运动， 1513年和1515年，当瑞士赢得了胜利，诺瓦拉和marignan ，他担任军队的牧师。