查询词典 dikes

The source of 100-110Ma and 90±Ma mafic dikes is similar to that of 125±Ma mafic dikes, and the source of 100-110Ma mafic dikes include more depleted mantle content.

这两期的基性岩脉的源区可能由亏损地幔、EMⅠ和EMⅡ地幔组分组成，与（125±Ma）基性岩脉类似，但早白垩世未期（100～110Ma）基性岩脉的源区可能含有相对较高的亏损地幔组分。

Petrologic and geochemical investigations of mafic dikes in detail were concentrated in north Gangdong from southeast China so far, a few half-backed study on mafic dikes of south Hainan and coastal belt of Fujian and southeast Hunan and ore region of some hydrothermal deposits, so systemically and large area investigations of mafic dikes from southeast China is still few and need to undertake in the future.

由于出露面积的关系，岩脉或岩脉群往往容易被人忽略，直到最近五年来中国东部中新生代基性岩脉的地球动力学意义才引起地质学者的关注，甚至有些学者指出中国东部中生代基性岩脉的研究可以填补国际上对此方面的空白。

Ma (early epoch of early Cretaceous) mafic dikes from south and north Jiangxi province, respectively, are available to comparative geological and geochemical discuss reveal that they are related to curst extension event and distinguish between rock series and trace element and isotopic characteristics of mafic dikes from south and north Jiangxi.

对赣南大吉山地区和赣北地区早白垩世基性岩脉的地质地球化学特征进行了系统的研究，表明它们可能代表中国东南部早白垩世初存在一次重要的岩石圈伸展和地壳拉张事件。

According to several types of Eco-dikes, several methods of revetment is brought forward, and several important problems in the process of building Eco-dikes is discussed and summarized; and the rivers rich in nature is concluded and compared, and it introduce the method of building river rich in nature in detail too.

根据生态河堤的几种类型，提出了相应的几种护岸做法，并对生态河堤建设中产生的几个重要性问题进行了探讨与总结；对于多自然型河流，进行了归纳与比较，并且对多自然河流的建设方法也进行了详尽的介绍。

There are strong to weak schistosity from rim to centre in all the dikes. The chemical compositions of the dikes are similar to that of the basalts.

无论哪种产状的脉体都发育片理化现象，且从脉体的边缘向中心减弱。

D dissertation mainly studied some Yanshanian mafic dikes, volcanic rocks and alkalic-ultramafic dikes in Shandong Province.

但关于它们的年代学和系统的地球化学研究还比较薄弱，且对其成因和形成的构造环境，仍存在着争议。

Although there is a little carbonite caused by some magmatic dikes in the CarboniferousPermiam coal, most Carboniferous-Permian coal has no great differences in vitrinite reflectance, crystalline indices, bulk specific gravity, hardness, and the content of velotile matter from the Jurassic coal, and both are super-anthracite.

区内石炭—二叠系煤与侏罗系煤除了前者含有一些由侵入体造成的天然焦或半焦外，二者均为超无烟煤，在镜质体反射率、煤晶核结构、显微硬度、挥发份和容重等方面上均没有明显的差异，说明区域变质是在煤系地层沉积之后发生的。

It is common occurance to demolish the spur dikes in daily life for development of economy.

因此，对于丁坝水流的研究具有普遍的理论意义。

The ancient shell dike is unique in China and one of the three existing large shell dikes in the world.

沿海的古贝壳堤是中国唯一也是世界现存的三大古贝壳堤之一。

Based on multi\|dimension gray evaluating theory, a method for evaluating hidden troubles in dikes is presented, and the computer software is compiled.

根据多维灰色系统综合评估理论，提出了一套堤防隐患的评估方法，并编制了相应的计算机软件。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。