中国东部新太古代末期构造演化——来自古老陆核构造恢复的启示

太古宙陆核的完整性对前寒武纪构造演化研究具有重要意义。华北克拉通东部陆块内太古宙陆核构造上受郯庐断裂影响较大，包括前期断裂带南侧NNE向左行走滑和后期断裂带北侧NE向左行走滑。本文还原了郯庐断裂发育之前华北克拉通东部陆块太古宙陆壳的原始格局。构造恢复后古老地体及地体内岩石片麻理均呈NNW走向。通过对弓长岭地区BIF铁矿进行深入的构造解析工作，发现含矿太古宙表壳岩发育大量暗示水平运动的逆冲推覆构造。结合其年代学特征，本文进一步揭示新太古代末期一定规模的侧向挤压构造(水平运动)可能已经在华北克拉通内出现。

Late Neoarchean tectonic evolution in eastern China: Enlightenment from the ancient continental core restoration

Unified Archean continental core is of great significance to the study of the tectonic evolution of Precambrian continental crust. The Archean continental core in the eastern block of the North China Craton is greatly affected by the Tan-Lu fault, including the early NNE-trend sinistral strike-slip movement in the southern segment of the Tan-Lu fault and the later NE-trend sinistral strike-slip movement in the southern segment of the Tan-Lu fault. This study restores the original pattern of the Archean continental crust in the eastern block of the North China Craton before the development of the Tan-Lu fault. The structural recovered ancient terrane and the gneissic foliations of the rocks all show the NNW-trending feature. Based on our structural analysis of the Gongchangling BIF area, a large number of thrust structures suggestive of a horizontal movement were developed in the ore-bearing Archean supercrustal rocks. Combined with geochronological age-dating of this Archean structure in the Gongchangling BIF, this paper further reveals that lateral compression structures (horizontal movement) may have occurred in the North China Craton at the end of the Neoarchean.