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混合岩

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Migmatization in Higher Himalayan Crystallines resulted from anatexis that took place at 22.67(/-0.60) Ma.

3高喜马拉雅结晶岩系的混合岩化现象是地壳深熔作用的结果。

During the evolution of these granitoids which resulted from rejuvenation and anatexis of the old basement (1200-2000Ma), the main ways for REE differentiations were:(1) partial melting;(2) fractional crystalization;(3) thermogravitational diffusion;(4) differentiations of metamorphism and migmatism, and (5) hydrothermalism.

在花岗岩的形成和演化过程中,有五种最主要的方式造成REE的分馏作用:(1)部分熔融作用;(2)分离结晶作用;(3)热重力扩散作用;(4)变质-混合岩化作用和(5)热液流体作用。

The chemical composition of Pingyang gneissic granite with high contents of SiO〓, Na〓O, Sr and Ba was inherited and developed from that of mainly biotite gneiss through anatexis under the background of regional migmatisation, it might also be introduced the fluid material from deep.

平阳片麻状花岗岩的化学成分是在区域混合岩化对岩石成分总体改造趋势的背景下,在黑云斜长片麻岩成分的基础上,通过黑云斜长片麻岩的深熔以及可能的变质脱水反应流体和深部流体的加入演变而成,富SiO〓、Na〓O以及Sr和Ba。

This paper demonstrates some rock genesis discrimination about Archean gray gneiss based upon REE geochemistry.

本文以稀土元素地球化学理论论证了北京、辽吉地区某些花岗岩为岩浆成因而非混合岩构成的"地层"。

The process of magmatic generation (namely migmatization and granitization)is the first step of undergoing formation of all granitoids.However only,some granites formed in the early period of geological history or the specified tectonic environment can preserve characte-ristics of migmatization and granitization in some degree.

岩浆的发生过程是所有壳型花岗岩类形成所必经的第一步,但往往只是一些在地质历史早期或特定的构造环境下形成的花岗岩才不同程度保留混合岩化、花岗岩化的特征。

This magmatic thermal event, which resulted in migmatization, granitization and magmatic intrusion in the basement rocks, played an important role in the formation of Zhejiang-Fujian stable crystalline basement.

用单颗粒锆石U-Pb稀释法获得的浙西南前寒武纪变质基底中花岗质岩石的年龄为:下际二长花岗岩1975±80Ma,里庄二长花岗岩1870±36Ma,田后花岗闪长岩1832±80Ma,三枝树混合岩1963±44Ma。

Or was migmatite by metasomatism.

或是交代成因的混合岩

This thesis analyzed the basic geological characteristics, petrology, mineral deposit geology, litho geochemistry, and deposit geochemistry of the copper deposit, acquired the following results:(1) According to the metamorphic grade and the metamorphic types of the rocks, suggesting that the mixed granite, granitic migmatite, plagioclase gneiss and hornblende gneiss of the first lithologic member and the second lithologic member in the first sub-formation of Aerbishimaibulake Formation in upper silurian-lower Devonian series belong to Xingxingxia group in proterozoic.

本文对该矿床基础地质特征和岩石学、矿床学、岩石地球化学以及矿床地球化学等方面进行研究,取得了以下熟悉:(1)根据岩石变质程度和变质类型,初步提出矿区上志留-下泥盆统阿尔彼什麦布拉克组第一亚组的第一岩性段和第二岩性段的混合花岗岩、花岗质混合岩以及斜长片麻岩、角闪片麻岩应回为元古界星星峡群。

During the early stage of Yanshan Movement in the Mesozoic Era, when the North China Plate had completed joining the Yangtze Plate to become a new united Craton massif, the tectonic movement turned to intracontinental orogenic stage, resulting in widespread magmatic activity and migmatization so that Tianzhu granitic batholith intruded the area on a large scale to form an embryo of the granite peak forest in the Tianzhu mountain area and ultrahigh pressure metamorphic zone further retraced its way, and consequently outcropped on the crust surface.

中生代燕山早期,华北、扬子板块已完成对接拼合,形成了新的统一的克拉通地块,构造运动已转入陆内造山阶段,引起广泛的岩浆作用和混合岩化作用,天柱山花岗质岩基大规模侵入,形成了区内天柱山花岗岩峰林胚胎,并导致超高压变质带进一步折返,并最终出露地表。

Since the Dabie orogenic belt was affected meanwhile by the delamination of post collision of Indo-Chinese epoch and the subduction toward EuraAsia continent of Izanagi plate, the upwelling of asthenosphere material supplied a lot thermal energy for crust, isobathythem ascented, this made middle and lower crust amphibolite and granulite facies metamorphic and large-scale free water-bearing system and large area migmatites and granites were formed.

在大别造山带印支期碰撞后所产生的拆沉作用和伊佐奈崎板块向欧亚板块的NWW向俯冲作用的共同影响下,软流圈物质上涌,为地壳输送大量的热能,等温面上升,使中下地壳发生角闪岩相或麻粒岩相变质作用和大规模含自由水体系的熔融,形成了大面积混合岩和花岗岩。

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