查询词典 sediments

In the Shasan (the third member of Shahejie Formation of the Palaeogene) age, huge deep water mudstone and multiple low angle sloped lake floor fan sediments were deposited as a result of active faulting and subsiding.

本区在老第三纪沙河街组第三段即沙三段沉积时期断陷活动强烈，发育了巨厚的深水泥岩和多期次缓坡型湖底扇沉积，为油气聚集成藏提供了丰富的油气源条件和储集条件。

Deeply study on changes of marine environment, provenance and flux of the sediments during the glaciation-interglaciation climatic cycle is a highlight field of the paleoceanography studies in the Okinawa Trough .

深入揭示冰期/间冰期气候旋回中冲绳海槽沉积物记录的海洋环境、物质来源和通量变化及其对古气候和海平面变化的响应信息，是该区古海洋学研究的前沿课题。

With the rich sediments supplied by the Pearl River, under the paleogeography sedimentary background of Baiyun Sag continuously subsiding, with sedimentary sequences related to relative transgressive sea level change ,contrary to regressive eustasy, the Pearl River Deepwater Fan System has specific evolution characteristics, which left the sedimentary record controlled by peripherical significant geological events. The sharp change of deposition rate and lithologic geochemical characteristics about 23.8Ma sequence boundary demonstratesd that sediment source had changed, perhaps related to the uplift of Tibet plateau and spreading of the South China Sea, which led the paleoPearl River drainage to expand to western China plateau , maybe much broader than present.

珠江深水扇系统以珠江为沉积物源、以持续深沉降的白云凹陷为沉积古地理背景、以与全球海退型海平面相反的相对海侵型海平面变化的沉积层序构成了其发育演化的特殊性，并留下了控制沉积的周边重要事件的记录。23.8 Ma等界面沉积速率和岩石地球化学特征均有突变，反映出物源区的变化，可能折射出与青藏高原隆升、南海扩张有关的重要事件，使得古珠江骤然向西部高原拓展，甚至较今天的珠江流域范围还广阔；承载珠江深水扇系统的白云凹陷持续沉降形成了陆坡内盆地，导致21~10.5 Ma BP多个层序深水扇垂向叠置充填的特殊沉积建造；根据60多口井资料建立的相对海平面变化曲线，具有与全球海平面变化相一致的三级旋回和不一致的二级旋回。

With the rich sediments supplied by the Pearl River, under the paleogeography sedimentary background of Baiyun Sag continuously subsiding, with sedimentary sequences related to relative transgressive sea level change ,contrary to regressive eustasy, the Pearl River Deepwater Fan System has specific evolution characteristics, which left the sedimentary record controlled by peripherical significant geological events.

珠江深水扇系统以珠江为沉积物源、以持续深沉降的白云凹陷为沉积古地理背景、以与全球海退型海平面相反的相对海侵型海平面变化的沉积层序构成了其发育演化的特殊性，并留下了控制沉积的周边重要事件的记录。23.8 Ma等界面沉积速率和岩石地球化学特征均有突变，反映出物源区的变化，可能折射出与青藏高原隆升、南海扩张有关的重要事件，使得古珠江骤然向西部高原拓展，甚至较今天的珠江流域范围还广阔；承载珠江深水扇系统的白云凹陷持续沉降形成了陆坡内盆地，导致21~10.5 Ma BP多个层序深水扇垂向叠置充填的特殊沉积建造；根据60多口井资料建立的相对海平面变化曲线，具有与全球海平面变化相一致的三级旋回和不一致的二级旋回。

Sulfur isotope of franeolite indicate that sulfur isotope value of phos phate concretion is larger than that of evaporite sulfate, there is little doubt that sulfur isotope fraetionation happens during phosphorite diagenesis, heav ier sulfur is laid in sediments because of formation of H〓S.

磷结核的稳定S同位素测试表明：其值大于同时代海水蒸发盐的值，这是由于在成岩作用过程中发生了S同位素分馏，生成H〓S，从而使沉积物中富集〓S。

Distribution of planktonic forminifera and pteropods in South China Sea sediments.

南海北部晚第四纪浮游有孔虫的溶解作用旋回［C］。

Later, under the weight of overlying sediments, this salt flowed plastically upward to form salt domes.

后来，在上层沉淀物的重压下，盐向上形成了含盐的圆顶。

Previous studies indicate two possibilities of the formation of the greigite: 1 the seepage of seawater during the postglacial transgression provides sulfate and makes the reducing diagenetic conditions; 2 it may be precipitated as the authengenic mineral in marine or lacustrine sediments during the low sea-level stand of the Late Pleistocene.

本研究在前期工作基础上，针对已发现的硫复铁矿富集区选择典型柱状样6根(深约1.5-2.5m，长柱样；B436、B437、B439、B459、B483、B484)，同时于扬子浅滩前缘新获取柱状样4根(深约0.3-0.5m，短柱样；ST9、ST13、ST15、ST23)，进行了U系测年，粒度分析、磁性测量、X—射线衍射分析、微体古生物鉴定分析、粘土矿物和化学元素含量测试，试图揭示东海外陆架浅部地层结构、揭露硫复铁矿在地层中的分布规律及成因机制，从而探讨该区晚更新世以来海平面波动模式及其控制下的地层发育。

Psychrophilic and psychro-tolerant bacteria were cultured and used for screening the cold-active enzymes. Some characteristics of cold-active protease and chitinase were analyzed then. Microbial 16S rDNA clone libraries of deep sea sediments were constructed and studied by PCR-RFLP (Restriction Fragment Length Polymorphism) and phylogenetic analysis based on 16S rDNA sequences.

通过构建沉积物中微生物16S rDNA克隆文库，采用PCR-RFLP分析、DNA-DNA杂交、16S rDNA序列测定以及系统发育分析的方法，研究了西太平洋&暖池&区和东太平洋&结核&区两个不同海区深海沉积物中的微生物多样性和群落结构特征及其与环境的相互关系，得到了一些与&暖池&区环境特点紧密相关的新发现，新认识。

Psychrophilic and psychro-tolerant bacteria were cultured and used for screening the cold-active enzymes. Some characteristics of cold-active protease and chitinase were analyzed then.Microbial 16S rDNA clone libraries of deep sea sediments were constructed and studied by PCR-RFLP (Restriction Fragment Length Polymorphism) and phylogenetic analysis based on 16S rDNA sequences.

通过构建沉积物中微生物16S rDNA克隆文库，采用PCR-RFLP分析、DNA-DNA杂交、16S rDNA序列测定以及系统发育分析的方法，研究了两太平洋&暖池&区和东太平洋&结核&区两个不同海区深海沉积物中的微生物多样性和群落结构特征及其与环境的相互关系，得到了一些与&暖池&区环境特点紧密相关的新发现，新认识。

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。