1) Mylonitization granite through the action of ductile shearing
韧性剪切作用糜棱岩化花岗岩
2) mylonitize granite
糜棱岩化花岗岩
1.
There are mylonitize granite distributing in southeast Mid-Da Hinggan Mountains of Zhalantun area.
东北大兴安岭东南处扎兰屯地区东南部分布着糜棱岩化花岗岩,1∶20万地质图依据其产状及岩石特征将此类变形花岗质岩石划分为混合变质岩系,视为额尔古纳-兴安地块早元古代形成的结晶基底。
3) Mylonitic granite
糜棱岩状花岗岩
4) granitic mylonite
花岗质糜棱岩
1.
The granitic mylonite occurred at the left-later shear Mayinebo fault belt as veined and banded shapes, which is consistent with shear-extension direction, belonging to syn-tectonic granite.
玛因鄂博断裂带具有左型剪切活动特征,分布其中的花岗质糜棱岩呈脉状、条带状产出,展布方向与剪切拉伸方向一致,为同构造花岗岩。
2.
This study also focused on 40Ar-39Ar dating of the biotite from granitic mylonite in the shear zone and yielded plateau ages of 347.
西秦岭北缘新阳—元龙大型韧性剪切带是分划西秦岭造山带与祁连造山带的区域主构造边界,通过对其物质组成和构造特征的研究,结合两侧不同(洋-陆)构造环境下各类地质体的研究成果,重点对剪切带内花岗质糜棱岩中黑云母单矿物进行了40Ar-39Ar定年研究。
5) syn-orogen mylonitization
同造山糜棱岩化作用
6) mylonitization
糜棱岩化
1.
It is considered that the mylonitized alkaline granite is of sedimentary-metamorphic genesis in view of the following facts: bedding is exhibited in the rocks, before mylonitization the rocks had granoblastic texture and rock-forming minerals such as natro-griinerite, which reflect region metamorphic genesis, and the zircons.
本文在野外工作基础上,系统研究了云南大平糜棱岩化碱性花岗岩岩石结构构造、矿物组成、主微量元素和锆石特征等。
2.
The mylonitization occurred in about 353- 370Ma ago with the temperature ranging from 425℃ to475℃ and pressure 3.
并论证了相应的糜棱岩化作用发生在353～370Ma前。
3.
Here,we report a field study of mylonitization and intensive sericitization impacts on zircons from the Fangcheng syenites.
而靠近断裂带的糜棱岩化和强烈绢云母化霓辉正长岩中的锆石则为淡黄-黄褐色半透明颗粒,其阴极发光和背散射电子图像显示其裂隙非常发育,有时为钾长石穿插呈海绵状,仅个别颗粒的局部区域仍可见残留的岩浆锆石的环带结构。
补充资料：糜棱岩
| 糜棱岩 mylonite 原岩遭受强烈挤压破碎后形成的一种动力变质岩。主要由细粒石英、长石及少量新生绢云母、绿泥石等矿物组成。矿物颗粒细小，一般小于 0.5毫米。具明显的条带状和眼球状构造，线理发育。显微镜下可见碎屑矿物具波状消光、解理和双晶纹弯曲 、颗粒边部碎裂等现象 。岩性致密、坚硬。主要由花岗岩、石英砂岩等刚性岩石经强烈动力变质形成。多发育于扭性或压扭性断裂带。依糜棱岩化程度分为糜棱岩化岩、糜棱岩、超糜棱岩和千糜岩等。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条