| 龙门山中段推覆构造带及相关构造的演化历史和变形机制（二） |
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| 引用本文： | 陈社发 邓起东. 龙门山中段推覆构造带及相关构造的演化历史和变形机制（二）[J]. 地震地质, 1994, 16(4): 413-421 |
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| 作者姓名： | 陈社发 邓起东 |
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| 作者单位： | 中国地质大学，国家地震局地质研究所，成都地质学院 |
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| 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
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| 关 键 词： | 龙门山 推覆构造带 前陆盆地 构造演化 构造变形机制 |
DEFORMATIONAL CHARACTERISTICS,EVOLUTIONARY HISTORY, AND DEFORMATION MECHANISM OF THE MIDDLE LONGMENSHAN THRUST-NAPPES AND RELATED TECTONICS |
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| Abstract: | (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 |
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| Keywords: | 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 |
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