查询词典 rhyolite-porphyry

The rock types include rhyolite,dacite and sedimentary volcaniclastic rocks,among which the lava tuff breccia was newly discovered in the 1∶ 50 000 region.

岩石类型为流纹岩、英安岩和沉火山碎屑岩，其中的熔结角砾凝灰岩是本次 1∶ 5万区调中的新发现。

The research results indicate that the volcanic rocks in the studied abea are composed of two different kinds of association: Tholeiitic series and calc-alkaline series (basalt, andenite, dacite and rhyolite ).

结果表明，研究区火山岩由拉斑系列大洋玄武岩和钙碱性系列岛弧玄武岩、玄武安山岩、安山岩、英安岩和流纹岩组成。

Volcanic gas reservoirs of low permeability in the carboniferous of a basin are characterized by deep burial depth, complex genesis, many types, wide distribution and non-evident expressions in three-porosity log curves, as well as the variedvalues of density and compression wave of main four volcanic gas reservoirs (such as the basalt, andesite, dacite and rhyolite). So a number of effective methods based on three porosity log data cannot work in identifying the volcanic gas reservoirs of the carboniferous of the basin.

石炭系火山岩的低渗透气藏具有的埋藏深、成因复杂、类型多、分布广、三孔隙度曲线响应特征不明显等特点，并且主要的四种火山岩气藏：玄武岩、安山岩、英安岩、流纹岩的密度和纵波时差测井值差别较大，因此使基于三孔隙度测井资料的一系列识别气层的有效方法在该盆地石炭系火山岩气层的识别中无明显效果。

Firstly, the volcanics and shaly sand were separated with FMI static images and conventional logging data. Then, the image characteristics of all typical volcanics were analyzed with the dynamic FMI images to establish the FMI image patterns of volcanic lava (including rhyolite, dacite, andesite, and basalt) and volcaniclastic rock (including volcanic breeds and tuff).

首先利用FMI静态图像和常规测井曲线将砂泥岩与火山岩区分开来；然后利用FMI动态图像分析了火山岩各种岩性的图像特征，归纳总结出火山熔岩类（流纹岩、英安岩、安山岩、玄武岩）和火山碎屑岩类的FMI图像模式。

The volcanic rocks belong to high kalium calc alkalic series and can be divided into andesite, dacite, trachydacite and rhyolite by petrochemical composition.

据岩石化学成分，金刚台组火山岩可划分为安山质、英安质、粗面英安质和流纹质几种类型，并属于高钾钙碱性系列。

The intermediate-basic volcanic rocks with SiO2 content less than 57.48 wt% are high in Al2O3(20.22-16.34 wt%) and K2O, enriched in large ion lithophile elements, show obvious Nb, Ta negative anomaly, these are same to the basalts which formed in island arc. The andesite, dacite and rhyolite rocks with SiO2 content between 62.11-75.19 wt%, are similar with the I-type granitic rocks formed in island arc in their geochemistry. It is suggested that the Jueluotage area of East Tianshan was in island arc setting during Late Carboniferous, when the subduction of the ancient Asian Ocean was in progress.

其中w(SiO2)小于57.48%的中基性火山岩具有高w(Al2O3)(16.34%~20.22%)，较富钾，富集大离子亲石元素，具明显的Nb、Ta负异常；w(SiO2)介于62.11%~75.19%之间的安山岩、英安岩和流纹岩岩石化学特征与准铝质的Ⅰ型花岗质岩石相似，其地球化学特征也反映出岛弧花岗岩的特点，表明东天山觉罗塔格地区路白山一带在晚石炭世仍处于古亚洲洋向南俯冲的岛弧环境。

The Mesozoic volcanic rocks are mainly located in Huoshiling Formation and Yingcheng Formation. The former consists of basaltic andesite, trachyandesite and dacite, the latter is composed of basaltic trachyandesite, trachyandesite and rhyolite. The cathodoluminesence images and high Th/U ratios of the zircons suggest their magmatic origin.

松辽盆地南部中生代含火山岩地层主要包括火石岭组和营城组，其中火石岭组火山岩由玄武安山岩－粗安岩－粗面英安岩组成，营城组火山岩由玄武质粗面安山岩－粗面安山岩－流纹岩组成。

Geological and geochemical features suggest that the bimodal volcanism took place in rift setting of continental margin, basic magma originated from not strongly depleted mantle, and rhyolite derived from the original melt formed by partial melting of granulite facies orthometamorphite in lower crust.

地质和地球化学特征指出吕梁群上部的双峰式火山岩形成于大陆边缘的裂谷环境，其中的玄武质岩浆起源于亏损程度较低的上地幔，并受到了陆壳物质的混染。酸性端元是由下地壳麻粒岩相正变质岩的部分熔融形成。

The primary formation of the mine is a rhyolite and obsidian flow, full of gas pockets.

主要形成的矿井是一个流纹岩和黑曜石流动，充满了气体的口袋。

In fact, the mine is made up of rhyolite and obsidian that has gas pockets in it, and silica which is necessary for much gemstone production and was carried to its.

事实上，地雷是由流纹岩和黑曜石它已在天然气口袋，这对硅很多宝石生产进行必要的和它的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。