摘要
贵州中部EW向构造带位于黔中隆起北缘，西起威宁以北，向东经纳雍、大方、黔西、息烽、瓮安、施秉直抵镇远之东，大致在北纬26°25′～27°30′之间。构造形迹在中西段（息烽－纳雍间）表现最为明显，以EW向排列的"穹盆"构造（北部）和EW向断裂（南部）为其特点；东段（余庆之南－镇远以东）则以EW向断裂占主导地位。从整体看，构造形迹断续跳跃，以其横向延伸格局横亘贵州中部，脉络清晰可见，虽然它们沉淀着加里东构造阶段EW向构造──黔中隆起的色彩，但其历史定位仍属燕山构造阶段的产物。
An EW-trending structural zone in Central Guizhou is located at northern edge of Central-Guizhou Uplift, from north of weining in the west, through Nayon, Dafang, Qianxi, Xifeng, Weng'an and Shibing to east of Zhenyuan in the east, approximately at 26°45′to 27°30′N. In the central-western segment of the zone (between Xifeng and Nayong), the structural feature is clearest and charcateriszed by an array of EW-trending'dome-basin'structures (in the north) and EW-trending faults (in the south); Whereas that of the eastern segment (from south of Yuqing to east of Zhenyuan) is dominated by EW-trending faults.On the whole, the structural feature changes discontinuously and a clear transverse-extending structural framework is across Central Guizhou. Inspite of inheriting the characteristics of Caledonian EW-trending structure-Central Guizhou Uplift, it still is the product of Yanshan tectonization
出处
《贵州地质》
1997年第1期40-45,共6页
Guizhou Geology
