contact metamorphism

Through analysis of Hegang coalfield regional stratigraphy, structure and magmatic activity patterns, the paper expounded that the coal metamorphism in the area is mainly regional metamorphism, locally some contact metamorphism.

通过对鹤岗煤田区域地层、区域构造、岩浆活动规律的分析研究，阐述了鹤岗煤田煤变质作用以区域变质作用为主，局部出现接触变质作用。

Contact metamorphism between granitic magma and sedimentary rocks, such as carbonate rocks and clastic rocks, occurred strongly in or near the contact area where skarn-type copper, tin and polymetallic ore bodies were formed in the same stage.

已有工程揭示花岗质岩浆与寒武系碳酸盐、泥砂质岩石发生了较强的接触交代作用，并在接触带附近产生矽卡岩型铜锡多金属矿（化）；

There is a complete metamorphic series of coal from lignite to meager coal in Wumuchang area, Yimin, the main metamorphism type is contact metamorphism of coal.

伊敏五牧场区存在着从褐煤到贫煤完整的变质系列，其主要煤变质类型为接触变质。

They are probably related to the subduction of the Paleo-Asia Oceanic plate, and their intrusion resulted in the contact metamorphism of the Majiajie Group.

它们的形成可能与晚古生代古亚洲洋的消减作用有关，该期花岗岩的就位导致马家街群发生了接触变质作用。

On the condition of thermal contact metamorphism, clay minerals in coal are changed into andalusite.

无烟煤中红柱石是煤中粘土质矿物经热接触变质作用形成的.

Types of metamorphic rocks: regional metamorphism, contact metamorphism and dynamic metamorphism.

变质岩类型: 区域变质 、 接触变质和动力变质.

Crumple structure formed by contact thermodynamic metamorphism;

接触热动力变质形成的揉皱构造；

The country rocks of the ores are characterized by heat contact metamorphism and metasomatism and clearly controlled by tectonic structures and magmatite.

矿体围岩具有热接触变质、接触交代变质特点，受断裂构造、岩浆岩控制明显。

The amount of CO2 releasing is calculated and its relative calculation model is proposed during the contact metamorphism in carbonate rocks.

对接触变质作用条件下碳酸盐岩石CO2气体释放量进行了地球化学模拟计算。

The theory of mantle degassing Fisher-Tropsch synthesis and possible modes oil and gas Fisher-Tropsch synthesis in plate structures, the mechanics and conditions of reservoir formed by contact metamorphism are introduced briefly.

简要介绍了油气形成的地幔脱气说、费-托法合成以及板块构造中油气费-托合成的可能方式、接触变质形成油气的机理以及条件等。

Magmatic contact metamorphism can lead to the variations of distribution patter of REEs in coal.

岩浆接触变质作用可导致煤中稀土元素分布模式的变化.