【摘要】：太行山構造巖漿帶由于礦產(chǎn)豐富、構造復雜、地理位置優(yōu)越等因素,長期以來都是地質(zhì)研究的熱點地區(qū)。宏觀上走向北北東、傾向南東的紫荊關斷裂帶就是太行山地區(qū)的主要構造之一,其對周邊巖體與礦床的控制、巖漿與成礦物質(zhì)來源、以及中生代華北構造格局的形成機制都具有重要的指示意義。因此,本文在充分收集和總結前人研究成果、資料的基礎上,以野外構造現(xiàn)象為基礎,以斷裂構造研究為主線,對紫荊關斷裂帶的構造特征進行了系統(tǒng)的研究。通過大量調(diào)查和室內(nèi)分析,探討了斷裂帶的幾何學、運動學和動力學特征,提出紫荊關斷裂帶具有以下特征:(1)紫荊關斷裂帶總體走向為北北東方向,傾向南東,北陡南緩。(2)紫荊關斷裂帶經(jīng)歷了三次不同強度的構造活動:前二次為較強的擠壓活動;第三次的張性斷裂活動,相對前兩次較弱。(3)由于紫荊關斷裂帶在平面上整體分布不連續(xù),斷裂各段之間呈左階斜列分布,故紫荊關斷裂帶在平面上具有分段性。(4)紫荊關斷裂帶在切過不同力學性質(zhì)的地層時展現(xiàn)出了分帶性。(5)紫荊關斷裂帶經(jīng)歷了三次不同性質(zhì)的構造活動:早期:晚侏羅世的近南北方向的強烈擠壓,中期:晚侏羅世到早白堊世受到北西南東向擠壓應力形成密集節(jié)理帶和花崗巖的左行逆沖斷層;晚期:晚白堊世的北西、南東向拉張兼右行走滑。
[Abstract]:The Taihang tectonic magma belt has long been a hot area in geological research due to its rich mineral resources, complicated structure and superior geographical location. The Zijingguan fault zone, with a macroscopic strike north to the north and a tendency to the south, is one of the main structures in the Taihang Mountain area, which controls the surrounding rock masses and deposits, and the source of magma and ore-forming materials. The formation mechanism of the Mesozoic North China tectonic framework is of great significance. Therefore, on the basis of collecting and summarizing the previous research results and data, based on the field structural phenomena and the main line of fault structure research, the structural characteristics of the Zijingguan fault zone are systematically studied in this paper. Based on a large number of investigations and laboratory analysis, this paper discusses the geometric, kinematic and dynamic characteristics of the fault zone, and points out that the Zijingguan fault zone has the following characteristics: (1) the overall trend of the fault zone is north to east and inclines south to east. (2) the Zijingguan fault zone experienced three tectonic activities of different strength: the first two were strong compressive activity, the third extensional fault activity was weaker than the previous two. (3) because of the discontinuous distribution of the Zijingguan fault zone on the plane, The faults are distributed in a left-order oblique sequence. Therefore, the Zijingguan fault zone is segmented on the plane. (4) the Zijingguan fault zone shows zonation when cutting through the strata with different mechanical properties. (5) the Zijingguan fault zone experienced three tectonic activities of different properties: early period: late pygmy. The strong compression of Ros near the north and south, The middle period: late Jurassic to early Cretaceous due to the compression stress of NNW direction formed dense joint zone and left thrust fault of granite, late stage: late Cretaceous NW, S E trending extension and right strike slip.
【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P542

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