摘要
川西前陆盆地是从晚三叠世晚期（须家河期）以来开始发育的，其形成是龙门山推覆构造带自北西往南东持续推覆的结果。本区的构造发展经历了伸展裂陷、构造反转和持续推覆３个主要阶段。构造变形的力源主要来自松潘－甘孜褶皱带的北东～南西向收缩派生的南东向挤压。
(Ⅰ) The middle Longmenshan thrust－nappe belt was developed by SE-directed compression,while the Songpan-Ganzi fold belt was subjected to NE－SW shortening. The Songpan-Ganzi foldbelt underwent four generations of deformation during middle-late stages of late Triassic : NW-trending structures were formed in D1 and deformed into acurate structures by left-lateral shear-ing in D2 ; D3 was Characterized by SE-directed thrusting , and granites intruded in D4. the mid-dle Longmenshan thrust-nappe belt consists of Yingxiu-Beichuan, Wenchuan-Maowen, Guanxi-an-Anxian and Southeastern marginal nappes, and the Yingxiu－Beichuan nappe can be dividedinto Jiudingshan, Pengguan Complex and Tangwangzhai sub-nappes. Klippen belongs to Peng-guan Complex sub-nappe. The thrust-nappe belt was propagated form NW to SE.
出处
《地震地质》
EI
CSCD
北大核心
1994年第4期413-421,共9页
Seismology and Geology
基金
地震科学联合基金
关键词
龙门山
推覆构造带
构造演化
构造变形机制
: Longmenshan, Thrust-nappe zone, Deformational Characterlstics, Defor-mation Mechanism Abstract (Ⅱ) The western Sichuan foreland basin initiated in T by continuous compression of the Long-menshan thrust-nappe belt, and its depositional centers were gr
