查询词典 petrographic

There are remarkable differences among chondrite groups in petrographic, mineralogical, chemical and O isotopic characteristics.

不同的球粒陨石群，其岩石学、矿物学、化学及氧同位素组成均有明显的差异。

Quantitative textural analysis of igneous rocks has been improving the traditional qualitative and semi-quantitative petrographic methods to a new level that can be compared to geochemical analysis, which including crystal size distribution, spatial distribution pattern, crystal alignment factor and dihedral angle etc.

定量化火成岩结构分析将传统的定性或半定量化的岩相学研究，提高到了与岩石地球化学分析相比拟的定量化程度，实现了诸如晶体粒度分布、晶体空间分布、晶体定向程度分析和二面角测量等方面的定量化研究。

Seven coals from Shenfu, Huangling, Huating, Yaojie, Lingwu, Datong and Urumuqi coal districts were selected as samples to study in this project. At first, petrographic characteristics, proximete and ultimate were done upon the coals.Lithotypes as vitrain, fusain, clarain and durain were separated.

本项目选择我国西北地区的神府矿区、黄陵矿区、华亭矿区、窑街矿区、灵武矿区、大通矿区、乌鲁木齐矿区的七种煤，首先进行了煤岩、煤质研究，得出这些煤的惰质组含量普遍较高。

It is called pleochroism when minerals or grains contained in a rock exhibiting variety of colors when viewed at any angles or spot under "polarizing petrographic microscope" Iolite gems have variety of colors depending on the angles.

它被称为多色当矿物或岩石中包含谷物展示各种颜色时，在任何角度观看，或当场在"偏光显微镜岩"玛瑙宝石有各种颜色不同的角度。

First, in the investigation, the author present the field and petrographic data in order to analyze the sedimentary facies of each profile, and to discuss the characters of the lithofacies and paleogeography in reference to some local data.

首先以实测剖面资料为基础，逐个分析每一剖面沉积相发育特征；结合有关区域资料，进行了研究区岩相展布规律的分析。

These features include:(1) the clear boundary being enriched with residue organic substance and the obvious fluidization feature shown by the relative accumulation of silty grains under the petrographic microscope;(2) the accompanied wrinkle structure and the palimpsest ripples which indicate the development of microbial mats on the sedimentary surface.

因此，这种粉砂岩岩墙应该解释为沉积面在曾经被微生物席封闭的情况下，相对富含有机质的细粒沉积物在早期成岩作用过程中所发生的脱气作用和脱水作用的产物，最终可以归为由微生物形成的沉积构造的一种类型。

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。

On the basis of the past schemes, new classifications of pyroclasts and the petrographic as well as the petrogenetic classification of pyroclastic rocks are proposed in this paper.

中国学者提出的火山碎屑岩分类时间较早，有自己特色，在一定的范围得到了应用。

Studies of longitudinal and horizontal distribution of coal reservoir ,macroscopic petrographic types,microcosmic petrographic component,pore configuration and permeability,vitrinite reflectance as well as absorbability in coal-bearing formation of Neopaleozoic in Shenmu area of the Ordos Basin indicate that,coal beds are thicker in the east and west,but thinner in the north and south.

通过对鄂尔多斯盆地神木地区上古生界含煤岩系中煤储层的纵横向分布、宏观煤岩类型、微观煤岩组分、孔隙结构与渗透性、镜质体反射率和吸附性能等方面特征的研究，认为：煤层总厚呈东西厚、南北薄的分布特点，煤层厚度满足煤层气开发的要求；多为半亮煤，仅东部边缘地带以半暗煤为主，表现为低含水、中等灰分含量和高挥发分含量的烟煤；煤岩显微组分中，镜质组含量最高，其次为惰质组；孔隙类型以微孔、过渡孔为主。

Dynamic evolution analysis of the sandy desertification in the Shenmu area , North Shaanxi, China;2. The stratigraphic order characteristics of coal-bearing strata in the Lower and Middle Jurassic in Shenmu area , North Shaanxi;3. Studies of longitudinal and horizontal distribution of coal reservoir,macroscopic petrographic types,microcosmic petrographic component,pore configuration and permeability,vitrinite reflectance as well as absorbability in coal-bearing formation of Neopaleozoic in Shenmu area of the Ordos Basin indicate that,coal beds are thicker in the east and west,but thinner in the north and south.

通过对鄂尔多斯盆地神木地区上古生界含煤岩系中煤储层的纵横向分布、宏观煤岩类型、微观煤岩组分、孔隙结构与渗透性、镜质体反射率和吸附性能等方面特征的研究，认为：煤层总厚呈东西厚、南北薄的分布特点，煤层厚度满足煤层气开发的要求；多为半亮煤，仅东部边缘地带以半暗煤为主，表现为低含水、中等灰分含量和高挥发分含量的烟煤；煤岩显微组分中，镜质组含量最高，其次为惰质组；孔隙类型以微孔、过渡孔为主。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。