山西太原组和山西组煤类分布特征及变质作用分析

Taiyuan and Shanxi Formations Coal Rank Distribution and Metamorphism Analysis in Shanxi Province

山西煤类齐全,煤质较优良,是我国主要的炼焦煤和无烟煤基地。以山西多年来的煤炭资源预测资料和众多矿区勘查资料为基础,全面总结了山西省太原组和山西组煤类分布特征及其变质作用。研究认为,山西的煤类分布具有明显的南北分带性,38°线以北煤变质程度较低,煤类较单一,以气煤为主;38°线以南煤变质程度相对较高,煤类较多;山西省煤变质类型主要有深成变质、岩浆热变质和接触变质三种类型,深成变质是基础,也是山西省最重要的变质类型,岩浆热变质主要是燕山期岩浆活动叠加于深成变质的基础上造成的,接触变质只是局部的,对区域性的变质影响甚微。研究成果可以为山西省煤炭资源的合理利用提供依据。

The Shanxi Province has coals with complete coal ranks and excellent coal quality and the province is the main coking coal and anthracite base in the country.Based on coal resource prediction data and mining areas exploration data in many years,and summarized the Taiyuan and Shanxi formations coal rank distribution and metamorphism features in the round.The study considered that the coal rank distribution in the province has obvious NS zonation,coal metamorphism degree to the north of 38o line is lower,rather unitary coal rank,mainly gas coal;to the south relatively higher,with multiple coal ranks.Metamorphic types mainly have hypozonal,magmatic thermal and contact three kinds of metamorphisms.The hypozonal metamorphism is the basic type and most important in the province;the magmatic thermal metamorphism is caused by mainly Yanshanian stage magmatic activities and superimposed on hypozonal metamorphism basis;while the contact metamorphism is only local and slight impact on regional metamorphism.The result can be the basis of Shanxi coal resources rational utilization.