查询词典 mantle

The study on the mechanism of petrogenesis of highFe magnesian magmas is important to understand the tectonic regime of magmas in depth, early evolution of crust, the heterogeneity of lower mantle and the interaction of coremantle. Meanwhile, it is also most significative for us to understand the petrogenesis of highFe magnesian rocks discovered from southern Taihang Mountains and other regions, in China.

其成因机制的研究对于理解其岩浆深部构造背景、早期壳—幔演化、下地幔组成不均一性和核幔相互作用有着重要意义；同时，对于最近在我国南太行山地区及其它地区发现的具有高铁镁特征岩石的研究具有极其重要的意义。

Keywords: Emeishan large igneous province; picrite; geochemistry; mantle plume; petrogenesis

中文关键词：峨眉山大火成岩省；苦橄岩；地球化学；地幔柱；岩石成因

In this paper, though the field geological investigations, and studies of element-isotope geochemistry, mineralogy and the geo-chronology, combining with the regional geotectonic analysis, the geochemical characteristics and petrogenesis of the mafic dikes from the coastal areas of Guangdong Province and Hainan Island are discussed, mafic magma episodes and mantle characteristics are analyzed, and the relationships between mafic magmatism and lithosphere evolution are studied.

本论文通过野外地质调查和一系列配套的岩石化学、微量元素、同位素地球化学、矿物学及年代学方法，结合区域地质构造分析，对广东沿海地区及海南岛基性岩脉的地球化学特征、成因、基性岩浆活动期次、地幔源区地球化学特征，以及岩石圈结构特征、形成机理和演化等进行了探索性的研究，得出以下几点认识： 1。

In some cases, stratigraphic relations require these excursions to be sustained for millions of years at values even below the mantle average of -5‰, the minimum value for a steady state C isotope mass balance in the Phanerozoic ocean.

某种程度上来说，层序的相关性需要至少低于地幔平均值-5‰并且至少多个百万年的同位素数值来获得，稳定碳同位素最小值对于新生代海洋碳同位素平衡起到了平衡的作用。

Dated from Proterozoic to Mesozoic, they have poly-circle characteristics, found from one tectonic circle to another, which is very rare in the worldwide orogens. This reveals that the orogen and stable area of the world, the mantle and crust states of the Proterozoic and Phanerozoic are different in tectonic evolvement and dynamic process and that the rapakivi granite of the Qinling-Kunlun is a kind of orogenic granite different from the stable area of the Proterozoic.

它们出现在每一个大的造山旋回晚期，即向另一个构造旋回的转折期，这在世界造山带中是十分罕见的，反映出世界上造山带与稳定区元古宙和显生宙的地慢与地壳状态是不一样的，有着不同的构造演化历史和动力学过程，表明秦岭－昆仑地区的环斑花岗岩是一种有别于元古宙稳定区的造山型环斑花岗岩。

Study on the lithology and petrology (fine-grained cold-quenching ring of the enclaves, the reverse vein, the complex enclaves, the plagioclase phenocryst from both host rock and enclaves that is consist on the crystal form, composition and light, et al.), petrogeochemistry (Y/Nb=2.77～6.82, La/Nb=0.91～4.33, Ba/Nb=0.13～37.86, et al.), Sr and Nd isotope most ISr between 0.7031～0.7041,εNd(t=5.2～7.1 and LA-ICP-MS zircon U-Pb dating (the host rock age is 311±12Ma, and enclaves is 306±7Ma), believe the Huangyangshan pluton is crust-mantle hybrid genesis.

通过岩石学和岩相学（包体细粒淬冷边，反向脉，复合包体以及寄主岩石和包体中斜长石斑晶在形态、成分、光性上的一致性等），岩石地球化学（Y/Nb=2.77～6.82，La/Nb=0.91～4.33，Ba/Nb=0.13～37.86等），Sr和Nd同位素（ISr多数在0.7031～0.7041，εNd在5.2～7.1之间）以及LA-ICP-MS锆石U-Pb测年（寄主岩石为311±12Ma，包体为306±7Ma）综合研究认为黄羊山花岗岩是壳-幔源岩浆混合成因的。

The mantle metasomatism in western Shandong could be subdivided into two stages, i.e. early metasomatic event with interstitial phlogopite and late metasomatic event with orthopyroxene vein or orthopyroxene+phlogopite vein.

鲁西区地幔交代作用应有两期，即早期的填隙型金云母和晚期的斜方辉石脉或斜方辉石+金云母脉体的形成，早期交代介质为富含CO〓和H〓O的熔体，晚期交代介质为富硅质的熔体。

The lower lithospheric mantle in western Shandong could be composed of Group Ⅰ inclusions which were subjected to orthopyroxene vein or orthopyroxene+ phlogopite vein and disseminated phlogopite metasomatism.

鲁西区软流圈的顶部，即岩石圈地幔的底部应为一套组Ⅰ型包体，它们存在斜方辉石交代脉体和斜方辉石+金云母的交代脉体以及弥漫型金云母；向上(约43～57km±)为一套堆积岩。

Through analysis of the experimental data about ultrapotassic rocks, typeI ultrapotassic rocks came from the source region of phlogopite harzburgite that had undergone metasomatism of fluid enriched in silica and potassium; while the source region of typeⅢ potassicultrapotassic volcanics is carbonated peridotite mantle bearing potassic amphibole.

综合超钾质岩石的实验资料，可知区内I型超钾质岩的源区以富硅、富钾流体交代形成的金云母方辉橄榄岩为主；Ⅲ型钾质超钾质岩浆源区则以斜辉橄榄岩地幔为主。

The picrite field, located in the southwest of Emeishan continental flood basalts and with the center in Lijiang—Dali—Panzhihua triangular area, is about 5×104 km2 and regarded as the axial area of the Emei mantle plume.

峨眉山大陆溢流玄武岩的西南部以丽江、大理和攀枝花三角区为中心的苦橄岩分布区，面积约5×10 4 km2 ，为峨眉地幔柱的轴部区。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐