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crustal environment
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  地壳环境
     POTENTIAL RISK IN CRUSTAL ENVIRONMENT FOR FUTURE DEVELOPMENT IN BEIJING URBAN AREA
     北京城市未来发展中地壳环境的潜在危机
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     This shows that diamonds may be formed at a relatively low temperature and pressure in crustal environment. The kimberlite is not only the carrier of diamond,but also the parent rock of diamond.
     这说明金刚石可形成于温度、压力较低的地壳环境,金伯利岩不仅是金刚石的载体,也可以是金刚石的源岩。
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  相似匹配句对
     Environment
     拯救地球环境
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     The Environment
     环境
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     CRUSTAL CONDUCTIVITY LAYER IN TIANSHAN AREA AND HYPOCENTER ENVIRONMENT
     天山的壳内高导层与震源环境
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     Fundamental database of crustal stress environment in continental China
     中国大陆地壳应力环境基础数据库
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  crustal environment
Ore lead shows a fairly homogeneous isotopic signature (206/204: 18.2-18.4; 207/204 ≈ 15.7; 208/204: 38.5-38.6), defining a high μ, high W province suggestive of an evolution in a crustal environment since at least the Middle Proterozoic.
      
A pervasive chloritic alteration (mainly clinochlore + magnetite) that overprints earlier assemblages probably took place in the upper crustal environment.
      
Therefore, even minor quantities of dissolved water will have a marked effect on the dynamic properties of silicate liquids in the crustal environment.
      
Subsequently, the composition and origin is discussed of the volatile species that are present in the deep crustal environment in which these scapolites formed.
      
Polybaric crystallisation of a larnite normative liquid in a crustal environment coupled with fractionation especially of phlogopite is important in the generation of members of the Bitterfontein suite.
      
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The appearance of clinopyroxene and garnet is only in the inner part of the contact aureole. The pyroxene from zone of pyroxene is higher in CaO and lower in A1_2O_3 and Na_2O. The garnet is higher in FeO、MnO and in lower MgO. These are interpreted as that they are formed by High-temperature contact metamorphism in upper crustal environments.The color of the hornblendes Changes from blue-green to brown with increase of metamorphic grade. Chemical changes in the hornbendes across the contact zone are the...

The appearance of clinopyroxene and garnet is only in the inner part of the contact aureole. The pyroxene from zone of pyroxene is higher in CaO and lower in A1_2O_3 and Na_2O. The garnet is higher in FeO、MnO and in lower MgO. These are interpreted as that they are formed by High-temperature contact metamorphism in upper crustal environments.The color of the hornblendes Changes from blue-green to brown with increase of metamorphic grade. Chemical changes in the hornbendes across the contact zone are the increase of (Na+K), Al and Ti. The data from Song Shu Gou contact metamorphic aureoles indicate the composition of hornblends in metamorphosed basic rocks may be used as an indicator of metamorphic grade.

松树沟橄榄岩是一个弱蛇纹石化的超镁铁质岩体,它侵入在区域变质的斜长角闪片岩中。业已证明,该岩体有一个出露良好且未受破坏的高温变质带。可用以下证据来鉴定松树沟接触变质围岩:从远离接触带到靠近接触带斜长石成分愈来愈基性,由An_(12)—An_(60),角闪石的颜色从蓝绿—绿—褐绿—深褐色,辉石和柘榴石只局限于接触带的内部,向着接触带榍石减少,钛磁铁矿增多,穿过接触带,角闪石的化学成分表现出(Na+K),Al和Ti的增多。

Being a member of the core complex in the Qinling folded belt the Qinling Group, is highly metamorphosed into amphibolite facies with migmatization. It displays a series of lens-shaped domains delineated by anastomosing ductile deformation zones. The petrography of the metamorphic rock indicates that the predominent biotite gneiss is evolved from argillo-arenaceous rock of terrigenous provenance. The REE pattern and the abundance of minor elements show that they belong to post Archean metasediments. The basic...

Being a member of the core complex in the Qinling folded belt the Qinling Group, is highly metamorphosed into amphibolite facies with migmatization. It displays a series of lens-shaped domains delineated by anastomosing ductile deformation zones. The petrography of the metamorphic rock indicates that the predominent biotite gneiss is evolved from argillo-arenaceous rock of terrigenous provenance. The REE pattern and the abundance of minor elements show that they belong to post Archean metasediments. The basic dyke swarms indicate that there developed an extensional crustal environment.

豫西秦岭群是东秦岭褶皱带的核心岩系,具角闪岩相变质并有不同程度的混合岩化.空间上呈透镜状构造域,其内部可识别三期变形,韧性强应变带十分发育。变质岩系内主体岩石显示为成熟度不高的陆源碎屑沉积,是活动带沉积的特点,变质泥砂岩沉积的稀土组成及微量元素显示为后太古沉积的特征,而区内广泛分布的变质基性岩墙群,可代表早期的地壳拉张环境。

A new kind of chemically complex diamond inclusion suite has been found in the Fuxian diamond formation in Liaoning Province. The diamonds in this formation possess a ring-like structure. The diamond inclusions include quatz, feldspar, oxide, sulfide, carbonate, silica-aluminium glass, and some spheres, reflecting a crustal geochemical environment. This shows that diamonds may be formed at a relatively low temperature and pressure in crustal environment. The kimberlite is not only the carrier of diamond,but...

A new kind of chemically complex diamond inclusion suite has been found in the Fuxian diamond formation in Liaoning Province. The diamonds in this formation possess a ring-like structure. The diamond inclusions include quatz, feldspar, oxide, sulfide, carbonate, silica-aluminium glass, and some spheres, reflecting a crustal geochemical environment. This shows that diamonds may be formed at a relatively low temperature and pressure in crustal environment. The kimberlite is not only the carrier of diamond,but also the parent rock of diamond.

本文通过对辽宁金伯利岩中具环带构造的金刚石中包裹体的研究,发现了国内外均未报道过的复杂成分的包体组合。其中包括石英、长石、氧化物、硫化物、碳酸盐、硫酸盐、硅铝质玻璃及球体等,具有明显的壳源物质特征。这说明金刚石可形成于温度、压力较低的地壳环境,金伯利岩不仅是金刚石的载体,也可以是金刚石的源岩。

 
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