Mesozoic and Cenozoic magma activity in the Wolong Lake mining area of Huaibei is frequent, and the degree of magma intrusion into coal seams remarkable. On the one hand, magma intrusion affects the utilization of coal resources; on the other hand, the macro and trace elements in coal are redistributed to form new mineral types. This study uses the Wolong Lake magma intrusion coal seam as a research object. The mineral paragenesis for igneous rock, coke, and thermally-altered coal in an igneous intrusion zone is studied using SEM, XRD, and Raman spectroscopy. During igneous intrusion, the temperature and pressure of igneous rock metamorphose ambient low-rank coal to high-rank coal and coke. The response mechanism of minerals and trace elements to magmatic intrusion is discussed. The results are: ① SEM analysis shows that ankerite and pyrite are formed from magma intrusion. Both minerals are strongly developed in the magma-coal contact zone, and less well developed in thermally-altered coal. ② XRD analysis shows that igneous intrusion strongly influences the types and content of minerals in coke and thermally-altered coal. In addition to the increase amounts of ankerite and pyrite, chlorite, serpentine, and muscovite, and other secondary minerals, are generated following igneous intrusion. ③ Raman analysis suggests that thermally-altered coal possesses the characteristics of both pyrite and coke. Coke from the magma-coal boundary zone possesses the typical characteristics of pyrite. Igneous rock contains a mineral similar to pyrite, confirmed by both having similar Raman peaks. The scattering intensity of Ag indicates that the formation pressure of pyrite increases from thermally-altered coal via the boundary between the coke zone and the igneous rock.

淮北卧龙湖矿区中，新生代岩浆活动频繁，岩浆侵入煤层的程度明显。一方面，岩浆侵入影响煤炭资源的利用。另一方面，煤中的宏观和微量元素会重新分布以形成新的矿物类型。本研究以卧龙湖岩浆侵入煤层为研究对象。利用扫描电镜，X射线衍射和拉曼光谱研究了火成岩侵入区火成岩，焦炭和热变质煤的矿物共生作用。在火成岩侵入过程中，火成岩的温度和压力将周围低阶煤转化为高阶煤和焦炭。讨论了矿物和微量元素对岩浆侵入的响应机理。结果是：①扫描电镜分析表明，岩浆侵入形成了铁矿和黄铁矿。两种矿物都在岩浆—煤层接触带中强烈发育，而在热改变的煤中则不太发达。②X射线衍射分析表明，火成岩侵入对焦炭和热变质煤中矿物的类型和含量有很大影响。除了火成岩和黄铁矿的数量增加外，火成岩侵入后还生成了亚氯酸盐，蛇纹石和白云母以及其他次要矿物。③拉曼分析表明，热蚀煤具有黄铁矿和焦炭的特征。岩浆煤边界带的焦炭具有黄铁矿的典型特征。火成岩含有类似于黄铁矿的矿物，这两种矿物均具有相似的拉曼峰。