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云英岩

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In contrast, the ε(322 Ma) values of five woiframite separates from the topaz-quartz vein ores range from -4.16 to -8.05, much lower than values of the greisen massive ore.

云英岩型钨矿石的形成作用与亏损地幔源岩浆活动有关,而黄玉-石英脉型钨矿石则很可能是壳源岩浆活动的产物。

The WO3 content of the W-bearing topaz-quartz veins and that of greisen blocks range from 1.23% to 1.86%(1.55% on average) and 0.26% to 0.54%(0.40% on average) respectively.

研究表明,红尖兵山钨矿床的矿化类型大体可划分为云英岩型和黄玉-石英脉型。

Through the geological work of Baxiannao area,we find that the area contains fracture zone compound type of quartz vein,the belt type of rock in thin vein,the belt type of greisen quartz in thin vein and some other kinds of the same stuff with multitype which are wolframite and cassiterite ore deposit polymetallic ore.

通过对八仙脑矿区的地质工作,发现本区存在破碎带-石英脉复合型、石英细脉带型、云英岩-石英细脉带型等一体多型钨锡多金属矿床类型,本文对其地质特征进行了较为详细的论述,总结了区内各钨锡多金属矿床类型找矿评价的工作方法。

The original defined adakitesare sodium igneous rocks, they are tonalite, trondhjemite or (plagioclase-rich) granodiorite in whole-rock chemistry; however, the K-rich "C-type" adakite defined by Chinese scholars are potassic igneous rocks, they are granite, quartz monzonite and (alkali feldspar-rich) granodiorite, etc.

最初定义的埃达克岩是钠质火成岩,其全岩化学成分相当于英云闪长岩、奥长花岗岩和花岗闪长岩;而富钾的"C型埃达克岩"全岩化学成分相当于花岗岩、石英二长岩和花岗闪长岩。

The peak is composed of banded biotite tonalite of fine mediate grain developing in Mengshan rock suit of Fuping period of Archean era about 2.7billion years ago. It's very steep.

由27亿年左右形成的太古代阜平期蒙山岩套条带状中细粒黑云母英云闪长岩构成,柱状节理发育,差异性风化剥蚀作用强烈,组成云蒙"山"峰,俗称"挂心崛子",形容云蒙峰之陡峻。

Neoproterozoic Baoxing Complex in middle to lower metamorphic grade, located in western margin of Yangtze Craton, consists mainly of metamorphic gabbroic, dioritic gneisses, tonalitic and granodioritic gneisses, and massive monzogranites The studies of petrochemistry and SmNd isotopes of Baoxing Complex reveal that the gabbroic and dioritic magmas came from a congenetic magma derived from the partial melting of spinel lherzolites in depletive mantle, and that the magma was intensively contaminated by crustal materials during its emplacement The tonalitic and granodioritic magma were derived from the partial melting of metamorphic basalts in the lower crust And the monzogranitic magma was formed from partial melting of metagreywacks Integrating the lithological association, their trace elements, SmNd isotopic characteristics and petrogenesis, the Baoxing Complex must likely have been emplaced in an island arc tectonic background at the Neoproterozoic active continental margin of Yangtze Craton

位于扬子克拉通西缘的新元古代宝兴杂岩主要由中低级变质的辉长质片麻岩、闪长质片麻岩、英云闪长质到花岗闪长质片麻岩和块状二长花岗岩组成。岩石地球化学和SmNd同位素特征表明,辉长质片麻岩和闪长质片麻岩为同源岩浆演化序列,原始岩浆起源于亏损地幔尖晶石橄榄岩的部分熔融,在上升和侵位过程中受到了地壳岩石强烈混染。英云闪长质和花岗闪长质岩浆形成于下地壳玄武质岩石部分熔融,而二长花岗质岩浆形成于杂砂岩的部分熔融。综合分析宝兴杂岩的岩石组合、微量元素和同位素特征,该杂岩体最有可能形成于新元古代活动大陆边缘火山弧构造背景,并可能经历了碰撞过程。

In Qiongshangou area, the outcropping strata in gully consists of thick quartz rock and the thin-to-thick marble contained two-greisen schist, of Maoxian Group in Silurian System, and bedrock consists of metamorphic granite, diorite gneissose and a few of metamorphic marble, and its surface layer contains a 30~60cm thick residual slope deposits formed by weathering.

邛山沟流域内出露地层为志留系茂县群厚层石英岩、二云英片岩夹薄至厚层大理岩,基岩表面风化形成30~60cm 厚的残坡积物。

In the K-Na-Ca diagram, intermediate part has the tendency of toellite, and acid part has the tendency of calc-alkaline. According to the above data, its tectonic setting is thought to be continental arc.

其序列组成为石英闪长岩-花岗闪长岩/斜长花岗岩/英云闪长岩-二长花岗岩组合,二长花岗岩略多,地球化学特征具典型造山花岗岩特征,K-Na-Ca图解中性段具英云闪长岩趋势,酸性段呈钙碱性趋势,其构造坏境为大陆弧。

The original defined adakitesare sodium igneous rocks, they are tonalite, trondhjemite or (plagioclase-rich) granodiorite in whole-rock chemistry; however, the K-rich "C-type" adakite defined by Chinese scholars are potassic igneous rocks, they are granite, quartz monzonite and (alkali feldspar-rich) granodiorite, etc.

最初定义的埃达克岩是钠质火成岩,其全岩化学成分相当于英云闪长岩、奥长花岗岩和花岗闪长岩;而富钾的&C型埃达克岩&全岩化学成分相当于花岗岩、石英二长岩和花岗闪长岩。

Accompanying the Jungar plate subdueted dewnwards along the northwest edge of Siberian eraton, the volatile-rich felsie biotite diorite batholiths and a lot of fracture-controlled quartz diorite vein intruded the are-back basin, Au preferently distributed within the disseminated magmatic sulfide during granitoid melt crystallization

阶段Ⅰ。华力西晚期伴随着准噶尔板块向北部西伯利亚板块的强烈俯冲,在额尔齐斯弧后盆地形成偏中性富含挥发份深源黑云英闪侵入岩及大量明显受构造控制的石英闪长岩脉,Au在岩浆结晶-分异演化过程优先在花岗岩中呈浸染状分布的岩浆碱化物中相对富集

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