脆性变形

藏南的上地幔盖层则可能发生以正断层为主的脆性变形。

Brittle deformation might occur in the uppermost mantle of southern Xizang .

结果表明Gr／Al的应力应变曲线可分为两个部分：非线性弹脆性变形以及材料失稳后的残余变形。

The experimental results show that complete stress strain curves of the material can be divided into two parts : the elastical brittle deformation and residual deformation .

汶川-茂汶断裂代表一条20～25km宽的剪切带的晚期脆性变形阶段。

This fault represents the last , brittle deformational stages of a 20 ~ 25 km wide shear zone .

结合X衍射分析方法研究结果认为，脆性变形不引起煤级的变化，而韧性变形可以促进煤的变质；温度是引起煤级升高的主导因素，定向压力是煤化作用进程的催化剂。

X-ray diffraction analysis indicates that brittle deformation cannot bring about the change of the coal rank , but ductile deformation can and that temperatures are the main factor for raising the coal rank and the directional pressure acts as the " catalysis " in the process of coalification .

向断裂带与E-W向断裂带是崎峰茶-得田沟金矿田内主要赋矿构造带，具有韧-脆性变形特征；

In the Qifengcha Detiangou gold field , the N S trending and E W trending fault zones are the major ore bearing structural zones , which are characterized by ductile brittle deformation .

燕山中晚期构造应力场转化为NW-SE拉伸，控矿断裂则以脆性变形为主。

Therefore , In the middle and last period of Yanshan , the regional stress system transformed from NW-SE direction pressure to NW-SE direction tension , and the stones in the structure belt expressed brittle deformation .

上地壳表现为脆性变形，中、下地壳为韧性的流动变形。

The middle crust and the lower crust is in the ductile field .

燕山期叠加的脆性变形使金锑矿进一步富集。

The Yanshanian ductile shearing resulted in further enrichment of gold and antimony .

矿床主要形成于韧－脆性变形阶段。

The deposit was formed in the phase of ductile - brittle deformation .

川东台阶状逆断层与韧-脆性变形的显微构造特征

Stepped thrust faults and microstructural features of ductile-brittle transition deformation in eastern Sichuan

固态岩石只能发生脆性变形和局部的脆韧性变形。

And in solid rocks could only happened brittle deformation or partially brittle deformation .

构造由多条长期活动的断裂带构成，沿断裂有糜棱岩带、角砾岩带和片理化带分布，同时发育韧、脆性变形；

That mylonite belts , breccia belts and schistosity belts occur along the fault ;

该推覆体的推覆面（映秀断裂）为脆－韧性变形，且以脆性变形为主的逆冲推覆断裂，并且有走滑性质。

The nappe underwent ductile deformation on which brittle deformation superimposed , with imbricated faults .

显微构造变形特征反映，断裂构造是在韧性&脆性变形条件下发生的。

Microscopic structure features reflect that faults occurred under the conditions of the ductile-brittle deformation .

研究结果表明：在岩石破坏过程中，韧性变形和脆性变形共同发展；

Testing results show that ductile deformation appears with brittle deformation before the failure of rock .

燕山期，全面陆-陆碰撞期间其主要表现为脆性变形特征。

The brittle deformation mainly occurred in the nouthern part during continent-continent collision in the Yanshanian epoch .

并在该环境下接受后期以脆性变形为主的变形改造。

Then rose to shallow surface environment , and underwent the later brittle deformation in this condition .

蛇绿岩中伸展变形构造经历了完整的变形序列：从韧性变形、经韧脆性变形到脆性变形。

These extensional structures underwent the integrated processes from ductile deformation , through ductile-brittle deformation to brittle deformation .

而晚期变形则发生在角闪岩相条件下，表现为脆性变形的特点。

But , in late stage , the garnets displayed brittle deformation under the condition of amphibolite facies .

最佳区段参数&低温韧-脆性变形-变质带和弱碱性钾质花岗岩；

The favourable section parameters , including low-temperature ductile - brittle deformation-metamorphic zone and weakly basic potassic granite bodies ;

随试验温度、压力条件的升高，岩石、矿物从脆性变形向塑性变形演变。

With the elevation of test temperature and pressure , the rocks and minerals were deformed from brittleness to ductility .

黄铁矿（Ⅰ）经历了韧脆性变形，因而是金的最佳载体矿物。

It is clear that pyrite has experienced ductile-brittle deformation , and therefore it is the best carrier mineral of gold .

反映了地质体由深部构造层次到上部构造层次，由韧性变形环境到脆性变形环境的总体演化过程。

These observed characteristics represent geologic body evolution from lower to shallow tectonic-level , and from plastic to cataclastic flow deformation in diwa .

矿化富集主要通过韧、脆性变形和岩浆隐蔽爆破，产生多次破碎，多期蚀变矿化。

The ore concentration are controlled by ductile and brittle deformation , and mag-matic hidden explosion resulting in rock multiple breaking and multiphase alteration .

在瓦斯突出过程中，已经历过塑性变形的煤岩又叠加了脆性变形，因而发生大量煤粉尘随突出而抛出。

In the process of gas outbursts , the plastic deformation is superimposed by brittle deformation , thus ejecting large quantities of coal dust .

脆性变形区的张性空间有利于再活化流体的运移和卸载，而韧性变形区则不利。

In contrast to plastically deformed areas , tensile spaces in the brittle deformation area could provide conduits for fluid transport and space for metal precipitation .

在较大范围内形成脆性变形系列的构造煤，是煤层气勘采的有利区带；

Since mylonitic coal is limited in a narrow area , biggish area in that tectonic coals of brittle deformation distribute is favorable for CBM exploration .

黑云母击象是脆性变形产物，它形成于以柔性变形为主的糜棱岩带中是由于构造过程中的应变硬化。

The percussion figure of biotite as the product of brittle deformation occurs within the mylonite belt characterized by ductile deformation because of strain hardening during tectonic pulsation .

构造变形分析显示该区在三叠纪曾发生韧性变形，在侏罗纪早期产生韧&脆性变形；

Analysis of tectonic deformation indicates that ductile deformation occurred in Triassic Period , ductile-brittle deformation occurred in Early Jurassic , while brittle deformation occurred after Jurassic Period .

断层岩中方解石的变形，在光学显微镜下表现有波状消光、机械双晶、显微破裂和碎裂等特征，反映了岩石的变形以脆性变形为主，韧性变形为韧-脆性过渡型变形。

Deformations of calcite of faulted rocks show optically fluctuating extinction , mechanical twinning and microcracks , and show that faulted rocks pass through a ductile-brittle transition deformation .