1) rapakivi-textured K-feldspar phenocryst
环斑结构钾长石似斑晶
2) crystals of feldspar
钾长石斑晶
1.
According to field survey and analysis on lithofacies, porphyritic crystals of feldspar belong to primary crystals formed by magma crystallization.
根据野外观察及岩石、矿物学特征测试分析,钾长石斑晶属于岩浆结晶形成的原生斑晶,受化学成分及侵位结晶过程中的物理化学条件影响,钾长石的生长速度大于其成核密度,因而形成粗大斑晶。
3) phenocryst texture
斑晶结构
4) rapakivi texture
环斑结构
1.
Rapakivi granite, a special kind of granite with rapakivi texture, mostly occurs in Proterozoic cratons.
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。
2.
The Doupangling composite granite body consist of Silurian, late-Triassic and middle-Jurassic granite bodies, among which the late-Triassic granites have rapakivi texture and are characterized by high in Si, K, REE, Rb and low in Sr with strong depletion of Eu.
通过岩石学研究发现晚三叠世三个单元的花岗岩均具斜长环斑结构 ,为黑云母奥长环斑花岗岩。
3.
This paper introduces the connotation of rapakivi texture and geological and geochemical characteristics of rapakivi granites.
本文介绍了环斑结构的含义及奥长环斑花岗岩的地质与地球化学特征。
5) Sanidine phenocryst
透长石斑晶
6) plagioclase phenocryst
斜长石斑晶
1.
Throughout the pluton there are randomly distributed mafic microgranular enclaves,Both in this enclave and granite exist a kind of plagioclase phenocryst ,which has a parthy core, In such plagioclase there are two composition surfaces,which divided the plagioclase p.
位于俄罗斯境内高加索地区的埃提哲尔花岗岩体中广泛分布暗色微粒包体，花岗岩体由黑云母花岗斑岩及暗色微粒包体组成，这两种岩石均含有一种具斑点状结构核的斜长石斑晶。
补充资料：似长石
化学组成与长石相似，金属阳离子为钾、钠或钙，但Si/Al比值小于3的一些无水架状结构铝硅酸盐矿物的总称。也称副长石。包括霞石、白榴石、方柱石、钙霞石和方钠石等。它们都产出在富含碱质而贫于硅的条件下，不与石英共生。其中以霞石和白榴石最为重要，是碱性岩石的主要造岩矿物。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条