degree of metamorphism

The higher degree of metamorphism is related to more intensive activity of magma .

煤变质程度较高与板块岩浆活动较强烈有关。

As to the coal seams with complex texture and higher degree of metamorphism , the qualitative division of coal species is more complex .

对于煤层结构复杂、变质程度较高的煤类，定性分类较为复杂。

Degree of metamorphism has influenced both the amount of coalbed methane generated from coal and the filtration properties of coal beds ;

煤岩变质程度一是影响生气量，二是影响煤岩的渗滤性；

Research shows that maceral and the degree of metamorphism of coal rock are key factors that control the generating and storing capacity of coal rock .

煤岩组分和煤变质程度是影响煤层生储气能力的主控因素。

Degree of metamorphism steps up along the strike from south to north , whereas steps up along the dip in company with depth .

在走向上煤的变质程度由南向北逐渐增高，在倾向上煤层随赋存深度的增大变质程度逐渐增高。

The results show that Jingxi anthracite is of low ash and low sulfur and has the deepest degree of metamorphism all over the country .

研究表明，京西无烟煤是一种低灰、低硫的高煤阶无烟煤，其变质程度是所有无烟煤矿区中最高的。

Coal samples metamorphic grade in the study area , overall coal microfractures in the number of articles with the coal degree of metamorphism increase tended to increase .

该区岩样变质程度内，整体上煤岩显微裂隙条数随煤的变质程度增加呈增加趋势。

Magma directly intruded into the coal beds or the seam floor in Himalayan epoch , resulting in generally higher degree of metamorphism and larger gas concentration of coal beds ;

喜山期岩浆直接侵入到煤层或煤层底板，使煤的变质程度普遍增加，煤的含气量增大；

In the regional geologic investgation ( 1 ∶ 50 000 ) the high grade metamorphic area was found for the first time in the Liuhe area , Jilin province , the degree of metamorphism can be granulite facies .

笔者在1∶5万区调工作中，于吉林省柳河地区首次发现了高级变质区，其变质程度达到麻粒岩相。

The fineness of native gold is influenced by many factors , such as genetic type , formation depth , the degree of metamorphism , mineralizing temperature and stages etc. Of all the factors , the formation depth of gold deposit is the most important .

影响金成色的因素较多，包括矿床成因类型、形成深度、变质程度、成矿时代、成矿温度和矿化阶段等，其中金矿床形成深度是最关键的因素。

The paper goes into details on the relation of the fineness of gold and electrum with gold metallogenetic epoch , depth , pressure and temperature , stages of mineralization , degree of metamorphism , deposit type and pH & Eh values of solution .

详细论述了自然金、银金矿成色与金矿形成时代、成矿深度、压力、温度以及矿化阶段、变质程度、矿床类型、溶液的pH值、Eh值等的关系。

The higher the degree of coal metamorphism is , the better the conductivity of coal is and the clearer the electric effect of methane gas in coal is .

煤化程度越高的煤导电性越好，且甲烷气体在煤中的电动效应越明显；

The influence of the degree of coal metamorphism , the storing heat circumstances of loosing and piling up coal , the air leaking on the process of active free radical chain reaction of coal natural oxidation are also analyzed .

分析了煤的变质程度、浮煤堆放蓄热环境和漏风供氧对煤炭自然氧化的活性自由基链式反应过程的影响；

According to the collected gas-geology data , the structural characteristics of Xin ' an minefield and geological tectonics and magmatic activity relationship has been studied , analyzing effects of magmatic activity to the coal seams , The degree of coal metamorphism and gas occurrence .

根据所收集的新安矿井的瓦斯地质资料，研究了新安井田构造特征以及地质构造与岩浆活动的关系，分析了岩浆活动对煤层、煤质和瓦斯赋存的影响。