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greenschist belt
相关语句
  绿岩带
     Strata in greenschist belt are source of gold mineralization belt, and tectonic function provides road for gold-bearing thermal flow and transformation.
     绿岩带地层为金矿化之矿源层,岩浆作用为金矿化带的形成提供了热源,构造作用对含金热液的流动与迁移提供了通道。
短句来源
  相似匹配句对
     BELT ART
     腰间艺术
短句来源
     Synchronous Belt Drive
     同步带传动的研究
短句来源
     The blueschist is characterized by the coexistence of sodic amphibole and epidote and occurs as bands or remnants in the extensive greenschist of belt A.
     蓝片岩相以钠质问石+绿帘石共生为特征,在A带的大面积绿片岩中呈条带或残片状分布。
短句来源
     New mineral evidence of high-pressure metamorphism of the Subei high-pressure belt——Aragonite inclusions in garnet from greenschist
     苏北高压变质带绿片岩中石榴石内文石包裹体的发现
短句来源
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  greenschist belt
The Highi? Massif is part of the Highi? Biharia Shear Zone, a 320-300?Ma Variscan greenschist belt, with a 114-100?Ma Alpine overprint.
      
From south to north these units are: Tongbai gneiss rise (TGR); Hongyihe-Luozhuang eclogite belt (HLE); Maopo-Hujiazhai igneous rock belt (MHI); Zhoujiawan flysch belt (ZFB); Yangzhuang greenschist belt (YGB); and Dongjiazhuang marble belt (DMB).
      


Basing on the materials collected during compilation of"Metamorphic Map of China(1/4000000)", this paper, firstly, gives a simple description of the main meta-morphic features and geological history of ten metamorphic provinces in China. Three main periods are distinguished about the crustal evolution of our country;1. during Archaean-early proterozoic period, the sialic crust of China was formed by vertical thickening and lateral overgrowth.By the end of early Proterozoic,the extensive cratonization gave rise...

Basing on the materials collected during compilation of"Metamorphic Map of China(1/4000000)", this paper, firstly, gives a simple description of the main meta-morphic features and geological history of ten metamorphic provinces in China. Three main periods are distinguished about the crustal evolution of our country;1. during Archaean-early proterozoic period, the sialic crust of China was formed by vertical thickening and lateral overgrowth.By the end of early Proterozoic,the extensive cratonization gave rise to the paleo- China craton.The regional metamorphism of this period is characterized by widespread monotonous am-phibolite facies of intermediate pressure as well as some granulite-facies implying an universal high thermal-flow value in upper crust of moderate thickness.2. in middle Proterozoic-early Mesozoic period, the crust of China craton was fractured and reworked repeatedly with the development of many new en-sialic mobile belts.They are characterized by regional low-temperature dynamic metamorphism of monotonous low greenschist facies.But in some rift and sag belts with thinning and highly cracing of sialic crust, the progressive metamorphism of centre-type plays an important role.The occurrence and mineral assemblages of glaucophane greenschist belts, which are rather common in each metamorphic epochof this period, are some different from that of typical glaucophane-lawsonitefacies in subduction zone of oceanic plate.They are formed under local tectonic overpressure at closing stage of some deep sea trough controlled by deep fault.3. metamorphism of Mesozoic-Cenozoic period is characterized by the formation of Miyashiro,s"paired autamorphic belt" in southern Tibet and Taiwan. They are related to plate tectonics.

根据中国十个变质地区各时期变质岩系的特征分析,提出中国的地壳演化可分三大阶段:(1)太古—早元古代古中国克拉通形成阶段;(2)中元古—中生代初克拉通“分——合”和活化阶段;(3)中、新生代板块活动阶段。

Four high-pressure metamorphic belts(HPMB),present in the Dabie orogenic zone,range from the north to the south:3T-phengite-bearing HPMB in the North Huaiyang massif, coesite-and diamond-bearing eclogite belt in the Dabie massif, glaucophane eclogite belt in the Dawu massifand glaucophane greenschist belt in the southern boundary of the orogenic zone.The granitoid data show that rock uplift-exhumation in the North Huaiyang massif, Dawu massif and western segment of the Dabie massif took mainly place before...

Four high-pressure metamorphic belts(HPMB),present in the Dabie orogenic zone,range from the north to the south:3T-phengite-bearing HPMB in the North Huaiyang massif, coesite-and diamond-bearing eclogite belt in the Dabie massif, glaucophane eclogite belt in the Dawu massifand glaucophane greenschist belt in the southern boundary of the orogenic zone.The granitoid data show that rock uplift-exhumation in the North Huaiyang massif, Dawu massif and western segment of the Dabie massif took mainly place before Jurassic, but that in the eastern segment segment of the Dabie massif occurred mainly after Jurassic.Since Caledonian,rock uplift-exhumation has extended to only about 10km in the North Huaiyang massif, but that in the Dabie massif to about 2km since Hercynian.The present paper suggests that the combination of the load pressure of over 20 km with the ultra-overpressure and high strain in the continental collision may result in the formation of high-pressure metamorphic rocks containing coesite eclogites. However, diamond in the HPMB may be,more probably, the xenocrysts carried to the earth crust by the early-time mantle-derived magma.

根据花岗岩类资料,分析了大别造山带自古生代以来的岩石隆升-剥露历史。认为北淮阳地块、大别地块西段及大悟地块的岩石隆升-剥露主要发生于侏罗纪之前,而大别地块东段在白垩纪之后还发生了强烈岩石隆升-剥露.本文指出,含超高压变质岩的大别地块东段自海西期以来的岩石隆升-剥露幅度达20km.这一深度的负荷压力与大陆碰撞过程中超过压和高应变条件的结合,有可能形成柯石英榴辉岩,但高压变质地体中的金刚石,更可能是早期慢源岩浆挟带到地壳中的捕虏晶。

Through study on geological characteristics, gold source bed, mineral combination and gold occurrence in Xinghuasi gold deposit, effects of metamorphism, magmatism and tectonic process to gold activating, transferring and concentration are studied in this paper. It is regarded that mineralization has a close relation with greenschist belt, ductile shear belt and Yanshan period magmatic movement, and the deposit belongs to polyphasic thermal filling-alteration type.

对兴化寺金矿床地质特征、矿物组合、金的赋存状态、金的矿源层进行了研究 ,探讨了变质作用、岩浆作用及构造作用对金的活化、迁移、富集的影响。其矿化与绿岩带、韧性剪切带及燕山期岩浆活动关系密切。属多期次热液充填蚀变成因。

 
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