第35卷第6期中国矿业大学学报V01.35No.62006年11月JournalofChinaUniversityofMining&TechnologyNov.2006文章编号:1000—1964(2006)06—0778—05贵州晚二叠世含煤地层沉积格局及其构造控制熊孟辉1’2,秦勇1,易同生h2(1.中国矿业大学资源与地球科学学院,江苏徐州221116;2.贵州煤田地质局地质勘察研究院,贵州安顺561000)摘要:贵州省主要含煤地层是上二叠统龙潭组和长兴组,先前研究基本查明了其沉积环境和区域构造背景.在此基础上,结合近年来的勘探成果,进一步就区域构造对含煤地层沉积格局的控制作用进行了探讨.研究表明:晚二叠世期间发育的同沉积断裂对含煤地层沉积格局起着区域性控制作用,形成了“东西分带、南北分区”的沉积与聚煤格局.总体来看,以横贯中部的遵义一惠水NNE向断裂带为界,东部地区海相沉积较为发育且煤层发育极差,西部地区以海陆交互相沉积为主且煤层发育较好;以盘县一六盘水NNE向断裂带为界,西部主要表现陆源区,而东部为沉积区.在此构造背景上,六盘水一瓮安断裂带将贵州中、西部进一步划分为黔北隆起和黔南坳陷2个一级构造单元,2个单元的沉积作用和聚煤特征差异显著.不同断裂带在不同沉积阶段沉降活动的差异性,是导致龙潭早期、龙潭晚期、长兴期沉积格局和聚煤特征有所不同的重要原因.关键词:贵州;晚二叠世;含煤地层;沉积格局;构造控制中图分类号:P618.11文献标识码:ASedimentaryPatternsandStructuralControlsofLatePermianCoal—BearingStratainGuizhou,ChinaXIONGMeng-huil一,QINYon91,YITong—shen91’2(1.SchoolofResourcesandEarthScience,ChinaUniversityofMining&Technology,Xuzhou,Jiangsu221116,China;2.GeologicalSurveyingInstitute,GuizhouCoalGeologyBureau,Anshun,Guizhou561000,China)Abstract:Themajorcoal—bearingstratainGuizhou,SouthChina,iscomposedofthelatePer—mianLongtanandChangxingformationswhosesedimentaryenvironmentsandstructuralset—tinghadbeenfoundoutinpreviousresearches.Inthispaper,thecontrolsoftheregionalstructuretothesedimentarypatternsofthestratawerediscussed.TheresultsshowthatthestratawasregionallycontrolledbythesynsedimentaryfaultswithinthelatePermian,whichresultedinthesedimentaryandcoal··accumulatingpatternsofthewest··eastzoningandnorth-southsectioninginGuizhou.Ingeneral,takingtheZhunyi—HuishuiNNEfaultzoneasaboundary,themarinedepositswithpoorcoalseamwereratherdevelopedintheeastern,andthecontinental—oceanictransitionaIdepositswithbettercoalseamweredominantinthewest—ern.TakingthePanxian-LiupanshuiNNEfaultzoneasaboundary,the1and—sourceareaexis—tedmainlyinthewestern,andsedimentaryareaoccurredintheeastern.Basedonthestructur—alsetting。thecentralwesterninGuizhouwasfurtherdividedintotWOthefirst-orderstructuralunits,i.e.,thenorthGuizhouupliftandsouthGuizhoudepression,whichweredistinctlydif—ferentinsedimentationandcoalaccumulation.Thediversityofthesedimentaryandcoal-accu-收稿日期:2006一01一06基金项目:国家自然科学基金项目(40572095)作者简介:熊孟辉(1964一),男,湖南省湘阴县人,高级工程师,硕士,从事煤田地质与勘探及煤炭资源的研究E-raail:menghuixiong@sina.cornTel:0853—8102305万方数据第6期熊孟辉等:贵州晚二叠世含煤地层沉积格局及其构造控制mulatingpatternsamongtheearlyLongtan,lateLongtanandChangxingageswasmainlyre—suhedfromthedifferentialsubsidenceinvariousfaultzoneswithinthedifferentsedimentarystages.Keywords:Guizhou;latePermian;coal—bearingstrata;sedimentarypattern;structuralcontrol贵州是我国的煤炭资源大省之一[】],素有“江南煤海”之称.其中,晚二叠世含煤地层分布面积7.5万km2,由下至上划分为龙潭组和长兴组,富煤区主要分布于桐梓一遵义一贵阳一贞丰一线以西地区.龙潭...