陆壳

After that, the break off of the subducted slab and the delamination of lithospheric roots happened.

该过程使俯冲板片或加厚的陆壳拆沉至软流圈中。

The authors think that the magmas of the intermediate-acid volcanic rocks were derived from basaltic magmas of the lower crust and are mixed magmas produced by the increase of geothermal gradients due to diapiric injection of basaltic magmas and partial melting of intermediate-basic metamorphic igneous rocks in the lower crust,and that they resulted from a series of tectonomagmatic activities that took place when the closing of the Mongolian-Okhotsk sea trough and continent-continent collision caused crustal thickening and brought about the formation of the Hinggan-Mongolian orogenic belt in the process of oblique subduction of the Paleo-Pacific plate beneath the Siberian plate.

中文摘要：通过对大兴安岭北段晚侏罗世吉祥峰组中酸性火山岩的岩石地球化学研究，发现其中存在高Sr低Y型火山岩，即文献上所称的埃达克质岩，笔者认为中酸性火山岩的岩浆起源于下地壳玄武质岩浆，为玄武质岩浆底辟上侵引起地热梯度增加、下地壳中基性变质火成岩石部分熔融的之混合岩浆，是古太平洋板块向西伯利亚板块斜向俯冲过程中，蒙古鄂霍次克海槽封闭，陆壳碰撞使地壳加厚，形成兴蒙造山带时所引起的一系列构造岩浆活动。

The results show that:(1) the earthquakes and hot springs are mostly located in the three main NEN trending strike slip fault zones and associated P,R′ faults;(2)The basic structural patterns in the region of high temperature hot springs or strong earthquake epicentres comprise left lateral en echelon faults and p...

结果表明：1研究区地震和温泉主要集中在 3条 NNE向主走滑断裂带及其伴生的 P、R′断裂带；2高温热泉或强震震中区的基本构造样式为走滑断层左行、左阶雁列带和拉分盆地构造；3陆壳结构分层特征是影响该区地震作用强度的一个重要因素。

Different from the magnetic lineations in oceans, magnetic quiet zone, where magnetic anomalies are greatly subdued in amplitude with long wavelengths, also probably contains information of tectonic activities and evolutions from continental margin rifting to sea floor spreading.

磁静区与磁异常条带不同，具有宽缓的低幅值磁异常特征，但可能同样包含了从陆壳张裂到海底扩张早期的构造活动和演化信息。

Low-Ti basalt magma was obviously contaminated by continent crust, in a larger extent than high-Ti basalt magma.

低钛玄武岩浆受到陆壳物质的明显混染，高钛玄武岩浆也受到混染，但混染程度弱于低钛玄武岩浆。

The change of REE composition between the upper and lower samples from Hongcan well implied the tectonic setting and property of the sediment provenance in Zoige Basin were altered obviously between late-period of Middle Triassic and mid-period or late-period of Late Triassic. This change was probably due to elevation and erosion of the matured continental crust on the east of Zoige Basin, and lots of clastic materials transported into the basin in late-period of Late Triassic.

通过对比杂砂岩稀土元素组成在上层和下层样品之间的变化，若尔盖盆地内中三叠世中期到晚三叠世中期及晚期沉积物源区的构造背景和性质发生了明显的改变，而这一变化很可能是盆地东侧成熟陆壳在晚三叠世后期被抬升和剥蚀，其大量碎屑物质被带到盆地的结果。

The results of investigation show that the crust in Junggar basin features continental character, and the basement of the basin is characterized by two-layer structure, the upper layer is Hercynian folded basement, and the lower is Pre-Cambrian crystalline basement.

结果表明，准噶尔盆地地壳具有陆壳性质，基底为双层结构，上层为海西运动期褶皱基底，下层为前寒武系结晶基底，褶皱基底厚度不超过10 km，在三个泉凸起以北厚度较大，为3~10 km。

The 207Pb/206Pb age (593Ma) of single zircon of quartz-syenite porphyry reflects that the intrusion of subvolcanics is accompanied by capture of paleo-zircon of the basement rocks, implying that the Precambrian continental basement possibly exists below Aqishan-Yamansu volcanic island arc.

而石英正长斑岩单颗粒锆石207Pb/206Pb年龄值(593Ma)反映了岩体侵位过程中捕获了基底岩石中古锆石的年龄信息。进一步推测在阿齐山－雅满苏火山岛弧之下可能存在前寒武纪陆壳基底。

However, the Precambrian sedimentary rocks are so minor that they cannot reveal the shape of the old blocks.

这一现象不但是地壳演化的普遍规律，而且也可反过来用沉积岩反映陆壳的演化。

Of the workings of the atmosphere, ocean, and continental crust over the entire planet. These data are shared globally

由已经进入轨道或是即将发射的卫星所形成的网络已开始提供有关整个地球的大气、海洋和陆壳运动情况的详细观测资料。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。