秦岭洛阳-伊川-十堰-秭归地学断面大陆岩石圈的岩石学模型

来源 :岩石学报 | 被引量 : 0次 | 上传用户:psobb045
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
根据该地学断面Vp结构模型,造山带中基性火成岩、金伯利岩和花岗岩中的深源包体资料,以及火成岩和变质岩,特别是超高压变质岩和超基性岩的分布和组成所揭示的壳幔深部组成的信息,结合与相对应的岩石实验Vp数据的对比,建立了秦岭洛阳-伊川-十堰-秭归地学断面及邻区的岩石圈组成的岩石学模型。这一岩石学模型表明,华北与扬子克拉通,南北秦岭造山带与其克拉通的过渡带岩石圈的岩石学模型各不相同。华北克拉通下地壳是以麻粒岩相中酸性片麻岩和紫苏花岗岩为主,同时含有基性麻粒岩,而扬子克拉通的下地壳是以角闪岩相-麻粒岩相酸性片麻岩和TTG为主体,广泛存在基性火成岩层。南北秦岭造山带的中下地壳各自继承了扬子和华北克拉通的中下地壳的特点,但已被强烈改造;南北秦岭造山带上地幔组成差异性较大,北秦岭上地幔上部以榴辉岩及榴闪岩为主,而南秦岭以蛇纹石化橄榄岩为主体,各单元100km以下的地幔都是一样的,都是石榴石二辉橄榄岩组成。因此,秦岭造山带是一个具有近30亿年历史的由不同大陆块体拼合组成的,不具简单的岩石圈分层结构样式。 Based on the Vp structural model of the geoscience section, the deep-sourced inclusions in the basic igneous, kimberlite and granite in the orogenic belt, as well as the distribution and composition of igneous and metamorphic rocks, especially the ultrahigh-pressure metamorphic and ultrabasic rocks Based on the information of the deep crust and mantle, the lithology models of the lithospheric composition of the Luoyang-Icheon-Shiyan-Zigui geochronological section and its adjacent area in the Qinling Mountains are established based on the comparison with the corresponding Vp data of the rock experiment. This petrological model shows that the petrological models of the lithospheric lithosphere in the North China and Yangtze Craton, the North-South Qinling orogen and their craton are different. The lower crust of North China Craton is dominated by the acidic gneiss and peridotite granulite facies and contains basic granulite, whereas the lower crust of the Yangtze craton is characterized by amphibolite facies - granulite facies acidity Gneiss and TTG as the main body, there are widespread basic igneous rocks. The middle and lower crusts of the Qinling orogenic belt in the north and south China inherited the characteristics of the middle and lower crusts of the Yangtze and North China cratons, respectively, but have been greatly altered. The composition of the mantle beneath the Qinling orogenic belt in the north and south is quite different. And mainly composed of garnet, whereas the South Qinling is dominated by serpentinized peridotites. The mantle below 100 km in each unit is the same, and is composed of garnet lherzolite. Therefore, the Qinling orogenic belt is a nearly 3 billion-year-old assemblage composed of blocks of different continents, with no simple layered structure of lithosphere.
其他文献
The electrochemical impedance spectra for bare steel and sample covered with calcareous deposit in artificalseawater were determined; the dependence of the impe
介绍一种 TiC/i- C双层复合硬质薄膜,该复合膜由碳化钛( TiC)膜层和 i- C(离子辅助沉 积)无定形硬质碳膜组成。采用反应磁控溅射的方法沉积碳化钛( TiC)膜层。随后在维持镀膜系 统真
有关专家对日本列岛未来地震趋势的看法在发生阪神大震灾1年之后,日本东京大学地震研究所阿部胜征教授和气象厅气象研究所地震火山研究部第三研究室主任石川有三于1996年1月14日在《日
9月30日,是阿根廷著名球星马拉多纳的“复活日”。马拉多纳在准备赴巴黎之前,接受了记者的采访。 记者:您即将在韩国汉城复出,对此您有何感想? 马拉多纳:我要用行动证明自己
《春节晚会一二三)中,作者是这样写电视导演邓在军的:“拍了自己视坛生涯的电视专题片后,总结了自己丰富的当电视导演的经验,也栖息视坛,悠哉悠哉,神仙般地享受子孙的天伦之
加强地矿博物馆工作的浅见李益民(成都理工学院博物馆成都,610059)中共中央、国务院"关于加速科学技术进步的决定"指出:"加强科学技术的宣传和普及工作,提高全民族的科技文化素质是推进科学
在“三资”企业年度查账工作中,经常查出一些未尽的会计事项.主要表现为应摊未摊、应提未提的各项成本费用.例如,固定资产折旧费、无形资产摊销、中方职工四项基金提取、汇兑
一部中国京剧史,从某种意义上说,就是诸多前辈艺术家的创业史。而支撑这部创业史的主体,则是那些卓有建树的表演艺术大师暨流派创始人。京剧史上的数度辉煌,莫不是因为涌现出一位
Anemia is a frequent finding in most diseases which cause malabsorption. The most frequent etiology is the combination of iron and vitamin B12 deficiency. Celia
鱼竿:我用的是4.5米(5节)的玻璃钢手竿改制的车竿,优点是竿长有挑力,如果竿短了,在钓上鱼的第一下起竿时,用很大的猛力也缺乏挑力,不易把鱼钩牢。我有一支3.06米的车竿也没