本文關鍵詞： 塔中隆起 下古生界 逆沖斷裂 分段差異 分期差異 控制機理　出處：《科學技術與工程》2017年33期 　論文類型：期刊論文

【摘要】：塔中隆起斷裂差異分段、分期變形特征及其控制機理是學者們關注的重大問題,但一直以來缺乏較為詳細的研究。本文在詳細的地震解釋基礎上,分析了塔中隆起主要斷裂的分段差異特征,甄別斷裂活動期次,進一步探討了塔中隆起斷裂差異變形的控制機理。塔中逆沖斷裂多具有分段差異變形特征,體現(xiàn)為沿斷裂走向基底卷入和膏鹽層滑脫型并存;加里東早期,塔中逆沖斷裂在局部構造段存在伸展正斷層的活動證據(jù);加里東中期Ⅲ幕,NW向逆沖變形最為強烈,同時大規(guī)模發(fā)育以NE向走滑斷裂;海西早期之后逆沖變形僅存在于部分斷裂的局部構造分段。本文研究表明,塔中地區(qū)基底構造具有橫向差異性,這可能是其下古生界差異變形特征的基礎;此外,塔中隆起變形強度也存在分段差異性,其橫向差異收縮作用是主要斷裂變形差異和活動差異的主控因素,也可能是北東向走滑調(diào)節(jié)斷裂的形成原因。
[Abstract]:The differential segmentation of the Tazhong uplift fault, the characteristics of the stage deformation and its controlling mechanism are the important problems that the scholars pay attention to, but there has been a lack of more detailed research. This paper is based on the detailed seismic interpretation. This paper analyzes the segmental differential characteristics of the main faults in the Tazhong uplift, discriminates the active stages of the faults, and further discusses the controlling mechanism of the differential deformation of the Tazhong uplift. The Tazhong thrust faults have the characteristics of segmental differential deformation. It is embodied in the coexistence of basement involvement and gypsum detachment along the fault strike. In the early Caledonian period, the Tazhong thrust fault has active evidence of extensional normal fault in the local tectonic segment. The NW thrust deformation was the strongest in the middle Caledonian stage 鈪，

本文編號：1482838