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1、合肥工業(yè)大學(xué)碩士學(xué)位論文滁河斷裂特征研究及其意義姓名:蘇蓉申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):構(gòu)造地質(zhì)學(xué)指導(dǎo)教師:劉國(guó)生20100401滁河斷裂特征研究及其意義摘要本文完成了滁河斷裂(巢湖地區(qū)青苔山一一草鞋嶺)段的構(gòu)造填圖,發(fā)現(xiàn)滁河斷裂在該區(qū)段有多條產(chǎn)狀一致、性質(zhì)相同的斷層組成,它們?cè)谄拭嫔蠘?gòu)成疊瓦狀組合;該斷裂以脆性破裂為主,構(gòu)造巖發(fā)育,主要為構(gòu)造角礫巖、碎裂巖和碎粉巖,其中發(fā)育了三條規(guī)模相對(duì)較大的構(gòu)造巖帶,這些角礫巖帶分別代表了三條強(qiáng)變形帶。在此基礎(chǔ)上,查明了滁河斷裂的特征(幾何學(xué)、運(yùn)動(dòng)學(xué)),對(duì)滁河斷裂構(gòu)造巖特征進(jìn)行了探討,提出了這些構(gòu)造巖經(jīng)歷了多期斷裂疊加;
2、在野外對(duì)多條斷層的擦痕進(jìn)行了統(tǒng)計(jì)、測(cè)量并利用法國(guó)巴黎南方大學(xué)研制的計(jì)算機(jī)程序反演了研究區(qū)內(nèi)古應(yīng)力場(chǎng)特征及演化過(guò)程,在綜合前人對(duì)該區(qū)動(dòng)力學(xué)背景研究的成果基礎(chǔ)上,探討了滁河斷裂的演化過(guò)程及各階段特征,即滁河斷裂經(jīng)歷了造山期的逆沖擠壓、晚侏羅世末一早白堊世初的左行平移、早白堊世一古近紀(jì)時(shí)期的伸展正斷及新近紀(jì)以來(lái)的逆沖擠壓活動(dòng)。在對(duì)滁河斷裂研究的基礎(chǔ)上,認(rèn)為該斷裂屬于下?lián)P子區(qū)的一條邊界斷裂,它控制著北西側(cè)滁一全坳陷的沉積、影響著南東側(cè)巢一含隆起的構(gòu)造變形。作為郯廬斷裂系的重要組成部分,與郯廬斷裂帶的構(gòu)造特征和演化方面有著良好的一致關(guān)系。關(guān)鍵詞:斷裂構(gòu)造構(gòu)造特征
3、應(yīng)力場(chǎng)分析滁河斷裂StudyonthecharacteristicandsignificanceoftheChuhefaultABSTRACTBasedonthetectonicmappingoftheChuhefault(fromQintaishantoCaoxielininChaohuarea),thispaperfindsouttheChuhefaultiscomposedofseveralfaultswhichhavethesameoccurrencesandcharacters,andtoformtheimbricatestructurein
4、sections;Thebrittlefracturegaveprioritytothisfault,thetectonitearedeveloped,mostlysuchasthetectonicbreccia,thecataclasiteandsmithereens,andthreelargetectonitezonesaredevelopedinit,thesebrecciazonesareseparatelyrepresentedthethreestrongdeformationbelts.Onthisbasis,thecharacterist
5、icsoftheChuhefault(Geometryandkinematics)arefoundout,thecharacteristicsofthetectonitearediscussed,andthesetectonitesexperiencedseveralissuesofthefaultoverlayonit;Inthefield,thescratchsofmanyfaultsarestatisticedandmeasured,then,thispaperutilizedtheprogrammetoinversingtheancientst
6、ressfield’SevolutionofthestudyareabythecomputerprogramdevelopedbySouthernUniversityinParis,F(xiàn)rance.Onthefoundationofthedynamicsbackgroundbyourpredecessors,theevolutionprocessandcharacteristicsofeachphasesarediscussed,thatiStosay,theChuhefaultzonehasexperiencedfourperiods,thethrus
7、textrusionduringtheorogenyperiod,thesinistralstrike—slipduringLateTriassictoEarlycretaceous;theextenddownfaultduringEarlyCretaceousandresultedinthesinistraIstrike.slipmovement;theextenddownfaultduringEarlyCretaceoustothePaleocene;thethrustextrusionduringtheNeogene.Onthefoundatio
8、nofresearchontheChuhefault.itiSconsideredthatit