豫西煤田构造煤反射率及其与古构造应力场的关系  

Relationship between vitrinite reflectance of deformed coal and palaeotectonic stress field in western Henan coalfield

作　　者：谢洪波[1] 徐亚富[2] 康继武[2] 

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]河南理工大学资源环境学院,河南焦作454000

出　　处：《煤田地质与勘探》2008年第4期1-4,共4页Coal Geology & Exploration

基　　金：国家自然科学基金重点项目(50534070);河南省自然科学基金项目(994070600)

摘　　要：为研究构造应力对煤反射率的影响,以豫西煤田不同构造区的构造煤和原生结构煤为对象,采用定向标本及反射率测定的方法作对比研究,发现构造煤的反射率比原生结构煤的反射率普遍偏高。根据反射率与构造应力的关系,求得各构造区的古构造应力场,通过与聚煤期后多次构造运动的主应力方向进行对比,可推知:影响嵩箕区二1煤变形和镜煤反射率的主要构造,是在前期断裂基础上喜山早期掀斜运动诱发的重力滑动构造,而影响崤熊区的则为燕山晚期的逆冲推覆作用。In order to study the influence of tectonic stress on coal vitrinite reflectance, taking the primary structure coal and the deformed coal from deferent tectonic areas in the coal fields of western Henan as the research objects, and using the method of oriented samples and reflectance measurement for contrast research, the article found that the reflectance of deformed coal is commonly higher than that of primary structure coal, According to the relation between vitrinite reflectance and tectonic stress, the palaeotectonic stress field of each tectonic area can be obtained. The correlation study of principle stress direction of multi-tectonic movements after coal accumulation indicates that the great tectonic movement affected the coal deformation and vitrinite reflectance of No.21 coal is gravity sliding structure induced by the early Xishan raise-slanting movement based on earlier faults in Songji tectonic area, but in Xiaoxiong tectonic area is a kind of the reverse thrust nappe structure generated during the later Yanshan movement.

关 键 词：豫西煤田 二1煤 镜煤反射率 

分 类 号：P618.110.2[天文地球—矿床学]