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斑岩

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The former petrochemical and geochemical characteristics show that it is similar to island are tholeiitic rocks and andesite. It is comparable with the geochemical pattern of the typical island arc basalt in the world, indicating thatisland arc environment is dominnant in the diagenetic process.

其中前者岩石化学、地球化学特征表明,具类似于岛弧拉斑玄武岩及安山岩的特点,并与世界典型的岛弧玄武岩地球化学型式具可比性,反映出岩石在成岩过程中具育相当于岛弧环境为主的演化趋势。

However, the Nb/Ta ratios lower than chondrite value (~17) in eclogites are inconsistent with previously proposed Nb/Ta high in subducted oceanic crust to complement the mass balance of Nb and Ta in the evolution of continental crust.

柴北缘沙柳河、鱼卡河、锡铁山和胜利口的榴辉岩类样品的地球化学分析显示它们的原岩的主体是与洋壳有关的火山岩,其中包括岛弧拉斑玄武岩、洋岛火。。。

Also on the analysis of geochemical data, it is sugested that the composition of eclogite is not simple butacombination of terrestriaI tholeiite and basic volcanic tuff and marl.

同时根据地球化学资料等分析,认为榴辉岩的成分不是单一的,一部分为大陆拉斑玄武岩、一为基性的火山凝灰岩和泥灰岩。

Three different kinds of clinopyroxenes were found in ankaramite and basalts: big phenocryst, small phenocrysts and microcrystals in groundmass respectively.

北塔山组富辉橄玄岩和玄武岩中存在着三种类型的单斜辉石:大斑晶辉石、小斑晶辉石和基质辉石。

Through the restoration of the metamorphic rocks, we conclude that the protolith are principally volcanic rocks. The volcanic rocks in the area evolved from the tholeiite series to the calcalkaline series, along with some terrestrial clastics.

通过对变质岩的原岩恢复,得出其原岩主要为火山岩,具有从拉斑玄武岩向钙碱性火山岩演化的特点,局部有陆源碎屑的加入。

Fresh perlitic rocks are found in the Jiutai area of the southeastern uplift of Songliao basin. In the perlitic rocks, phenocrysts are well preserved and they are mainly composed of plagioclase, biotite, amphibole, and mafic clinopyroxene and orthopyroxene.

在松辽盆地边缘东南隆起九台地区出露有比较新鲜的珍珠岩,内部斑晶保存完好,裂隙发育;斑晶矿物主要有斜长石、黑云母、角闪石,还有镁铁质的单斜辉石和斜方辉石。

Ore deposit, have been studied detailly; the orebody pattern (sedimental bedded ores combined with stringer ores of hydrothermal origin) is also outlined; four metallogenic epoches are devided; the zoning of mineralization (including zones of ores, elements, mineral assemblages and temperature of mineralization) have been depicted; the main types of wall-rock alteration are characterized as propylitization of basic rocks and pyritization-sericitization-silicification of acidic pyroclastic rocks; the origin of ores and seven kinds of main minerals have been studied; and the metamorphism and deformation of orebodies is thought mainly due to the shearing and the intrusion of subvolcanic rocks

研究了七个矿化带特别是I号矿床的矿床地质特征,描绘了矿体的双层结构(沉积矿石与热液充填交代的细网脉状矿石),划分了四个成矿期次,区分了矿化分带(包括矿石组构的成因分带、元素分带、矿物组合分带、温度分带),指出了围岩蚀变的主要特征是细碧岩青盘岩化而石英角斑质凝灰岩黄铁绢英岩化;对矿石及七种主要矿石矿物的成因作了研究;探讨了矿体的变质、变形,指出韧性剪切及次火山岩侵入的热力作用和应力作用是导致矿体变质变形的主要原因

Compared with the typical rapakivi granite, Yingfeng complex is characterized by smaller exposing area, monotonous rock types, larger megacryst content, even megacryst size, diversified matrix texture, and obvious deformation and metamorphism.

与典型环斑花岗岩相比,该岩体有出露面积小,岩石类型单调,球斑含量大,大小较均匀且为多晶集合体,出溶作用强烈,基质结构多样,变质变形明显等特征。

The Zhashui granite body, with typical rapakivi texture, is intruded into the nearby Shangdan suture zone of the Qinling orogen.

柞水岩体侵位于秦岭造山带商丹缝合带附近,具有比较典型的环斑花岗结构,本文获得了213.6±1.8 Ma的单颗粒锆石 U-Pb 年龄,MSWD 为 1.5,这个年龄与前人在东秦岭沙河湾环斑花岗岩测定的锆石 U-Pb年龄非常一致。

The mantle shear zone formed at lithospheric extensional setting of Meso-Tethys and reworked by serpentinization, cataclasis, and compressional deformation including deformed lens such as ophiolite, gabbro, and chronite, thrust faults, and folds produced during closure of the Meso-Tethys.

在南北向挤压导致海盆消亡的早期阶段,处于深层侵位环境的地幔橄榄岩由于物性的不均一性,变形分解作用产生不同尺度的透镜网络,如蛇绿岩体、辉长岩脉、纯橄岩异离体、豆荚状铬铁矿体、眼球状橄榄石、辉石残斑晶等。

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