In petrographic terms, this stone is defined as volcanic tufa.
地质学上，此石材属于火山凝灰岩。
It may be subdivided into three members based on the petrographic characteristics.
根据岩石特征划分三个岩性段。
The chemical composition, petrographic analysis and dispersing property of kinds of bauxitic clay are compared.
对比研究了几种铝矾土的化学组成、相组成和分散性能。
Through accurate description and dissection of deltaic front outcrops, 11 petrographic facies types are established.
通过对三角洲前缘露头的精细描述和解剖 ，建立了研究区 1 1种岩石相类型。
The results show that coals combustion characteristics have a linear dependence relation with the petrographic factor.
研究表明：煤的燃烧特性与岩相因子有很好的线性相关性。
Both petrographic features and the geochemical modeling also show that they are the late-stage crystallization phases.
岩相学特征和地球化学模拟也都表明这些富铝矿物结晶较晚。
This text adopted the method of clinker burning, X-ray analysis, petrographic analysis to analyse the relationship and mechanism.
本文在研究过程中采用了熟料试烧、小磨试验、X -射线分析、岩相分析、物理性能试验等手段来分析相互关系及机理。
With the progress in petrographic analysis of coal, petrographic analysis of coking coal is applied abroad in blending and coking.
随着煤岩测定技术的进步，炼焦煤的煤岩性质已在炼焦配煤中得到广泛应用。
The example to process the Sichuan series of red granites indicates that the sawability will be effected by the petrographic characters of the granites.
并以四川红系列花岗岩石材加工为例，说明了花岗岩岩相学特征对岩石可锯性影响的程度。
The relation between the character of the flotation feed and the petrographic constituents of raw coal and especially the flowsheet is briefly described.
扼要地概括浮选原料的性质与原煤的岩相组成的关系，特别是和工艺流程的关系。
The earlier units contain abundant mafic micro-enclaves, and the petrographic study of the enclaves indicates the crust-mantle mixing origin of the granitic magma.
较早次单元中富含镁铁质微粒包体，经包体岩相学研究，花岗岩浆具壳幔混合成因。
By means of SEM, EDAX and om, the petrographic structure and microscopic chemical composition of cement clinker have been researched by adding rare-earth lean ore.
采用SEM、EDAX、OM等分析测试方法，研究了稀土贫矿掺加条件下，水泥熟料的岩相结构及其微区化学组成。
The abnormal transformation of smectite clay minerals in central Junggar Basin is analyzed according to the petrographic thin section and X - ray diffraction data.
利用岩石薄片和X射线衍射资料，分析了准噶尔盆地腹部地区蒙皂石粘土矿物的不正常转化。
Petrography and mineral chemistry of 100 meteorites collected from the Grove Mountains, Antarctica, were studied and their chemical-petrographic types were assigned.
本文主要报道了南极格罗夫山新回收的100块陨石的岩石学和矿物化学特征。
By adopting the analytic methods such as thermal-gravimetric analysis and petrographic analysis, an appraisal research on burning characteristics of the composite coal is made.
采用热重分析和岩相分析等方法，对复杂煤种的燃烧特性进行了评价。
By petrographic analysis the microstructure characteristics of ladle slag building-up has been researched and the process and mechanism of the ladle slag building-up discussed.
通过岩相分析方法研究了钢包粘渣试样各段带的显微结构特征，探讨了钢包粘渣的过程和机理。
Because the properties of maceral groups are not similar, the difference of petrographic constituents should be taken into consideration when Datong coal is utilized or studied.
因为各显微组分组的性质不同，所以对大同煤的研究和利用必须考虑其煤岩组成的差别。
In the petrographic analysis of the corrosion product of zircon mullite sintered brick only the aluminosilicious crystal phase was observed, which often leads to mistake analysis result .
针对前脸墙鼻部烧结锆莫来石砖侵蚀物结石中常常只看到铝硅质晶相而被误判，详细介绍了烧结锆莫来石 砖的蚀变过程及侵蚀产物的岩相分析。
This paper deals with petrographic characteristics and coal qualities of Jiaoping coal by means of coal petrologic, instrumental analytical and organic solution extraction methods, and so on.
基于煤岩分析、仪器分析及有机溶剂抽提等方法，对焦坪煤进行了系统的煤岩、煤质研究。
This provides petrographic evidence for the study of the genesis of the granites and also implies that vertical crustal growth probably took place in the Late Paleozoic Jiamusi-Songnen craton.
这为探讨这些花岗岩的成因提供了岩石学依据，同时也暗示晚古生代佳木斯—松嫩古陆可能发生过地壳的垂向生长。
The origin of the usual siliceous stone in float glass was discussed on the basis of petrographic examination and its formation mechanism analysis. A solution to this kind of stone was proposed.
通过对实际生产中各种常见硅质结石缺陷的岩相鉴定及生成机理分析，对该类结石来源进行探讨，并提出解决的办法。
A quick-setting (flash-setting) cement and a no (?) mal-setting cement were systematically studied for the difference in petrographic structure of clinker, their hydration and hardening of cements.
着重观测了快(闪)凝与正常凝的水泥熟料的结构和水化过程的显著差别。
This paper explains slag erosion mechanism of middle grade MgC brick based on petrographic analysis after the slag erosion, as well variation of the slag composition before and after the slag erosion.
根据渣侵后镁碳砖的岩相和渣侵前后钢渣成分的变化，阐述了中档镁碳砖的渣侵机理。
This paper explains slag erosion mechanism of middle grade MgC brick based on petrographic analysis after the slag erosion, as well variation of the slag composition before and after the slag erosion.
根据渣侵后镁碳砖的岩相和渣侵前后钢渣成分的变化，阐述了中档镁碳砖的渣侵机理。
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