煤田地质与勘探2016，Vol.44Issue(6)：1-7,7.DOI:10.3969/j.issn.1001-1986.2016.06.001
韩城矿区南中深部隐伏逆冲构造的发现及其地质意义
Discovery and geological significance of concealed thrust-fault at medium and big depth in the south of Hancheng mining area
摘要
Abstract
To guide geological exploration, the Paper analyzedthe deformation characteristics of concealed thrust fault, revealed the formation mechanism of the fault, carred out the structural prediction. Through the fine surface observation, 2D seismic exploration and verification of drilling engineering, on the basis of discovery and under-standing of the morphological features of structures, the coupling relationship between shallow structures and deep structures was analyzed. In combination with the stress field of paleostrcture, the genesis of structures was elabo-rated. The results showed that the north-south and deep concealed thrust faults were dipping to the west and thrusting to the east, the dip of the fault plan is 20°~35°. The faulting took place inside Shihezi Formation, under-lying coal-bearing measures and their basement. The vertical throw is 190~260 m, the horizontal displacement is 260~470 m. The shallow strata occurred as unidirectional assymmetrical anticlines. The shallow strata and the deep strata were closely associated in space, interrelated in geometry and kinematics, unified in genesis. The shallow anticline was the result of fault-propagation folding under control of deep overthrusting. The concealed thrust-fault was the response to the reverse thrust faulting induced by the tectonic crushing stress in the basin during middle Yanshan orogeny. The thrust fault dislocated coal seams, led to repetition of seams, controlled the spatial distribu- <br> tion of coal seams, constituted important tectonic boundary in the mid and deep part of the south of Hancheng mining area.关键词
反冲断层/断弯褶皱作用/NWW向构造挤压/渭北石炭-二叠纪煤田/韩城矿区Key words
overthrust-fault/fault-bend folding/NWW tectonic compression/Weibei Permo-Carboniferous coalfield/Hancheng mining area分类
天文与地球科学引用本文复制引用
王辉,贺小龙,范玉海,崔胜,李小强,梁敏,潘春娟,金谋顺,张少鹏..韩城矿区南中深部隐伏逆冲构造的发现及其地质意义[J].煤田地质与勘探,2016,44(6):1-7,7.基金项目
国家科技重大专项课题(2008ZX05025-006)；国家重点基础研究发展计划(973计划)项目(2015CB453000)；国家自然科学基金(U1261111)@@@@National Science and Technology Major Project(2008ZX05025-006)；The National Basic Research Program of China (973 Program)(2015CB453000)；National Natural Science Foundation of China(U1261111) （2008ZX05025-006）
