Late Jurassic trachyandesites from Tiaojishan Formation in Western Hills of Beijing are similar to adakitic rocks in geochemical characteristics.
北京西山晚侏罗世髫髻山组粗安岩具有高的SiO2 (>5 6 % )、Al2 O3(16 。
Excepting a few high-K 2O rhyolite, trachydacite and trachyte, latites commonly having clino and orthopyroxenes phenocrysts are superior in quantity and distribution.
除少量的高钾流纹岩、粗面岩和粗面英安岩外，在数量和分布上以普遍含二辉石斑晶的安粗岩占优势。
This paper compares latitic series of the Yan-shanian tectonic cycle in Beijing region with those of the generally accepted latitic series bothat home and abroad, then discusses the characteristics of the different volcanic rock series,and lastly points out that the latitic series is an independent volcanic rock series which maycoordinate with the tholeiite series,calcalkali.
安粗岩系是指由钾质粗面玄武岩、橄榄玄武粗安岩、安粗岩、粗面岩和高钾流纹岩等富钾岩石组成的火山岩系列，本文以北京地区燕山构造旋回安粗岩系火山岩为例，通过与国内外公认的安粗岩系比较，以及对不同系列火山岩特征的对比分析，明确提出：安粗岩系是可以与拉斑玄武岩系、钙碱性岩系和碱性玄武岩系并列存在的独立的火山岩系列，它有自己特定的产出环境，有别于其他岩系的岩石类型、岩石组合及物质成分等特点。
Their petrology,lithochemistry and trace element geochemistry revealed that,though,the rock series changed from shoshonite to quartz syenite,syenite and alkaline-feldspar granite,they did not belong to ultrapotassic rocks(K2O/Na2O<2,w(MgO)<3%).
对二者进行岩相学、岩石化学及微量元素地球化学的比较研究可知:岩石组合上从橄榄安粗岩系向正长岩和碱性花岗岩变化,不属于过钾质岩石(K2O/Na2O<2,MgO<3%);微量元素和稀土配分形式大致相同(富集Rb,Th等大离子亲石元素,亏损Ti等高场强元素,LREE富集);主量元素显示具有同源岩浆结晶分异的特征(Al2O3,MgO,FeO*,TiO2,CaO,P2O5都与SiO2呈现良好的负相关)。
The rock assemblages of the Bayinbuluke formation are mainly alkaline basalt-thick andesite-alkaline rhyolite.
火山岩岩石组合以碱性玄武岩-粗安岩-碱性流纹岩为主.
Discovery of the basaltic andesite-high-K basaltic andesite-trachyandesite association in the Yuximoiegai Daban, West Tianshan and its geological significance.
西天山玉希莫勒盖达坂玄武安山岩-高钾玄武安山岩-粗安岩组合的发现及其地质意义
A-TYPE GRANITES ALONG WITH SHOSHONITIC ROCKS IN THE LUZONG AREA
庐枞地区A型花岗岩类与橄榄安粗岩系研究
Gneiss is called bastard granite.
片麻岩叫作粗花岗岩。
Characteristics and zircon SHRIMP U-Pb dating of the Amduo trachyte,Tibet,China
西藏安多地区粗面岩的特征及其锆石SHRIMP U-Pb定年
A dark, fine - grained igneous rock;diabase.
粗玄岩，辉绿岩一种暗色微粒火成岩；辉绿岩
massive coarse grained porphyritic granite
块体粗粒斑状花岗岩
The coarsest sandstones intercalated with grey mudstones.
最粗粒砂岩与灰色泥岩成互层。
The minerals are disseminated in the schist and hornfelsed schist near the dolerite contact.
这些矿物也浸染在靠近粗玄岩接触带的片岩和角岩片岩中。
diorite ,further worked than roughly split or squared
闪长岩,经过除粗劈或粗削方以外的进一步加工
lava further worked than roughly split or squared
火山岩,经过除粗劈或粗削方以外的进一步加工
block, slate, further worked than roughly split, roughly squared, or squared by sawing
板岩块，除粗劈、粗方锯或锯方外经进一步加工的
A light-colored igneous rock consisting essentially of alkali feldspar.
粗面岩一种浅色火成岩，主要由碱长石构成
A light - colored tuff used in hydraulic cement.
粗面凝灰岩一种用来生产硬水泥的淡色凝灰岩
The olivine grains in the troctolite of the Upper Zone are rather short and thick.
上岩带橄长岩中的橄榄石颗粒相当短粗。
In lithology, the calcareous sandstone is of coarse grain and fairly well sorted.
岩性主要为粒度相对较粗、分选较好的碎屑岩。
a sedimentary rock formed of coarse-grained material.
一种由粗颗粒物质形成的沉积岩。
`Rough as a saw edge, and hard as whinstone!
“像锯齿一样地粗，像岩石一样地硬！