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- rapakivi aplite 环斑细晶岩
- Rapakivi is a special rock in Precambrian. 环斑花岗岩是发育于前寒武纪的一种特殊岩石。
- The rapakivi granites have a number of petrological peculiarities. 环斑花岗岩具有若干岩石学的特征。
- This paper also makes theoretic discussions on the rapakivi granites. 最后对研究秦岭环斑花岗岩的几个理论问题进行了探讨。
- Many diorite porphyrite and albite aplite dikes are found in the gold district and its surrounding areas. 晚期在浅部为风化淋滤富集成矿。
- The Yingfeng rapakivi granite which like a bean between Tanjianshan group and Dakendaban group, located between scale ductile shear zone. 摘要鹰峰岩体侵位于达肯大阪群和万洞沟群之间,呈扁豆状产出。
- The authors reported Mesozoic granitoids with rapakivi texture occurring in the Qinling orogenic belt. 笔者曾报道了在秦岭造山带中发育有印支期具有环斑结构的花岗质岩石。
- Recent studies show, however, that rapakivi granites can be formed in age from Archaean to Phanerozoic and can even occur in orogen. 环斑花岗岩既可以出现于从太古代到显生宙的各个地质时期,也可以产生于造山带中。
- The rapakivi granite of the Qinling-Kunlun is remarkably characterized by its existence in the orogenic belt,closely related with the suture belt of platform. 秦岭-昆仑造山带中环斑花岗岩的显著特征是都产在造山带中,与板块缝合带关系密切,时代从元古宙到古生代直到中生代都有发现,具多旋回性。
- Lu Xinxiang, Wei Xiangdong, Xiao Qinghui, Li Rongshe and Yang Yongcheng. 1998. Rapakivi granite belt discovered in the western Qinling mountains. Geol. Rev. , 44(5) :535. 卢欣祥;尉向东;肖庆辉;李荣社;杨永成.;1998
- According to field investigation,the Yingfeng rapakivi granite is formed in mid-Proterozoic and located between shear belts as a lentiform in the structural belt of north margin of Qaidam basin. 野外调查表明,鹰峰环斑花岗岩体形成于中元古代,位于柴北缘构造带,呈透镜状夹持在剪切带间。
- 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。
- As the age and tectonic setting of the Shahewan pluton obviously differ from those of typical rapakivi granites, whether the granite belongs to rapakivi granite or a new type of granites needs further investigation. 由于其形成时代和产出背景不同于典型环斑花岗岩 ,该岩体属典型环斑花岗岩还是一种新的似环斑花岗岩还有待于进一步研究
- The study on the Zhashui rapakivi granite body in this paper shows that the rapakivi granite has the characteristics of I- and A-type granite in terms of geochemistry of major elements, trace elements, rear earth elements and primitive Isr. 研究表明,柞水岩体的主元素、微量元素及稀土元素地球化学、Sr 同位素初始值 I_(Sr)等清楚的显示具有I-型和A-型花岗岩特征,大地构造环境判别属碰撞后隆升阶段或造山后花岗岩。
- genetic type of rapakivi granites; 世界上环斑花岗岩的成因类型;
- 2) definition of rapakivi granites; 环斑花岗岩的定义;
- rapakivi -textured K -feldspar phenocryst 环斑结构钾长石似斑晶
- 3) genetic type of rapakivi granites; 世界上环斑花岗岩的成因类型;
- Keywords pegmatite;aplite;asymmetrically layered structure;magmatic -hydrothermal transitional stage;volatile saturation;residual granitic melt; 水溪庙花岗伟晶岩脉;层状花岗伟晶岩;岩浆一热液过渡阶段;不对称带状结构;
- Keywords porphyry copper deposit;metasomatism;K feldspar rapakivi texture; 斑岩铜矿;钾长环斑结构;交代作用;找矿标志;